Merge pull request #191 from sasjs/issue-190

fix: added more gremlin characters

README.md

@@ -9,40 +9,49 @@
 
 Our goal is to help SAS developers everywhere spend less time on code reviews, bug fixing and arguing about standards - and more time delivering extraordinary business value.
 
-## Linting
+# Linting
+
 @sasjs/lint is used by the following products:
 
-  * [@sasjs/vscode-extension](https://github.com/sasjs/vscode-extension) - just download SASjs in the VSCode marketplace, and select view/problems in the menu bar.
+- [@sasjs/vscode-extension](https://github.com/sasjs/vscode-extension) - just download SASjs in the VSCode marketplace, and select view/problems in the menu bar.
-  * [@sasjs/cli](https://cli.sasjs.io/lint) - run `sasjs lint` to get a list of all files with their problems, along with line and column indexes.
+- [@sasjs/cli](https://cli.sasjs.io/lint) - run `sasjs lint` to get a list of all files with their problems, along with line and column indexes.
 
 Configuration is via a `.sasjslint` file with the following structure (these are also the defaults if no .sasjslint file is found):
 
 ```json
 {
-    "noEncodedPasswords": true,
+  "noEncodedPasswords": true,
-    "hasDoxygenHeader": true,
+  "hasDoxygenHeader": true,
-    "hasMacroNameInMend": true,
+  "hasMacroNameInMend": true,
-    "hasMacroParentheses": true,
+  "hasMacroParentheses": true,
-    "ignoreList": [
+  "ignoreList": ["sajsbuild/", "sasjsresults/"],
-      "sajsbuild/",
+  "indentationMultiple": 2,
-      "sasjsresults/"
+  "lowerCaseFileNames": true,
-    ],
+  "maxLineLength": 80,
-    "indentationMultiple": 2,
+  "noNestedMacros": true,
-    "lowerCaseFileNames": true,
+  "noGremlins": true,
-    "maxLineLength": 80,
+  "noSpacesInFileNames": true,
-    "noNestedMacros": true,
+  "noTabs": true,
-    "noSpacesInFileNames": true,
+  "noTrailingSpaces": true,
-    "noTabIndentation": true,
+  "defaultHeader": "/**{lineEnding}  @file{lineEnding}  @brief <Your brief here>{lineEnding}  <h4> SAS Macros </h4>{lineEnding}**/"
-    "noTrailingSpaces": true,
-    "defaultHeader": "/**{lineEnding}  @file{lineEnding}  @brief <Your brief here>{lineEnding}  <h4> SAS Macros </h4>{lineEnding}**/"
 }
 ```
 
-### SAS Lint Settings
+## SAS Lint Settings
 
-#### defaultHeader
+Each setting can have three states:
 
-This sets the default program header - applies when a SAS program does NOT begin with `/**`.  The default header is as follows:
+- OFF - usually by setting the value to `false` or 0. In this case, the rule won't be executed.
+- WARN - a warning is written to the log, but the return code will be 0
+- ERROR - an error is written to the log, and the return code is 1
+
+For more details, and the default state, see the description of each rule below. It is also possible to change whether a rule returns ERROR or WARN using the `severityLevels` object.
+
+### defaultHeader
+
+This isn't actually a rule - but rather a formatting setting, which applies to SAS program that do NOT begin with `/**`. It can be triggered by running `sasjs lint fix` in the SASjs CLI, or by hitting "save" when using the SASjs VS Code extension (with "formatOnSave" in place)
+
+The default header is as follows:
 
 ```sas
 /**
@@ -52,7 +61,7 @@ This sets the default program header - applies when a SAS program does NOT begin
 **/
 ```
 
-The default header is automatically applied when running `sasjs lint fix` in the SASjs CLI, or by hitting "save" when using the SASjs VS Code extension.  If creating a new value, use `{lineEnding}` instead of `\n`, eg as follows:
+If creating a new value, use `{lineEnding}` instead of `\n`, eg as follows:
 
 ```json
 {
@@ -60,122 +69,163 @@ The default header is automatically applied when running `sasjs lint fix` in the
 }
 ```
 
-#### noEncodedPasswords
+### noEncodedPasswords
 
-This will highlight any rows that contain a `{sas00X}` type password, or `{sasenc}`.  These passwords (especially 001 and 002) are NOT secure, and should NEVER be pushed to source control or saved to the filesystem without special permissions applied.
+This rule will highlight any rows that contain a `{sas00X}` type password, or `{sasenc}`. These passwords (especially 001 and 002) are NOT secure, and should NEVER be pushed to source control or saved to the filesystem without special permissions applied.
 
-* Default:  true
+- Default: true
-* Severity: ERROR
+- Severity: ERROR
 
-#### hasDoxygenHeader
+### hasDoxygenHeader
-The SASjs framework recommends the use of Doxygen headers for describing all types of SAS program.  This check will identify files where a doxygen header does not begin in the first line.
 
-* Default:  true
+The SASjs framework recommends the use of Doxygen headers for describing all types of SAS program. This check will identify files where a doxygen header does not begin in the first line.
-* Severity: WARNING
 
-#### hasMacroNameInMend
+- Default: true
-The addition of the macro name in the `%mend` statement is optional, but can approve readability in large programs.  A discussion on this topic can be found [here](https://www.linkedin.com/posts/allanbowe_sas-sasapps-sasjs-activity-6783413360781266945-1-7m).  The default setting was the result of a poll with over 300 votes.
+- Severity: WARNING
 
-* Default:  true
+### hasMacroNameInMend
-* Severity: WARNING
 
-#### hasMacroParentheses
+The addition of the macro name in the `%mend` statement is optional, but can approve readability in large programs. A discussion on this topic can be found [here](https://www.linkedin.com/posts/allanbowe_sas-sasapps-sasjs-activity-6783413360781266945-1-7m). The default setting was the result of a poll with over 300 votes.
-As per the example [here](https://github.com/sasjs/lint/issues/20), macros defined without parentheses cause problems if that macro is ever extended (it's not possible to reliably extend that macro without potentially breaking some code that has used the macro).  It's better to always define parentheses, even if they are not used.  This check will also throw a warning if there are spaces between the macro name and the opening parenthesis.
 
-* Default:  true
+- Default: true
-* Severity: WARNING
+- Severity: WARNING
 
-#### ignoreList
+### hasMacroParentheses
-There may be specific files (or folders) that are not good candidates for linting.  Simply list them in this array and they will be ignored.  In addition, any files in the project `.gitignore` file will also be ignored.
+
+As per the example [here](https://github.com/sasjs/lint/issues/20), macros defined without parentheses cause problems if that macro is ever extended (it's not possible to reliably extend that macro without potentially breaking some code that has used the macro). It's better to always define parentheses, even if they are not used. This check will also throw a warning if there are spaces between the macro name and the opening parenthesis.
+
+- Default: true
+- Severity: WARNING
+
+### ignoreList
+
+There may be specific files (or folders) that are not good candidates for linting. Simply list them in this array and they will be ignored. In addition, any files in the project `.gitignore` file will also be ignored.
+
+### indentationMultiple
 
-#### indentationMultiple
 This will check each line to ensure that the count of leading spaces can be divided cleanly by this multiple.
 
-* Default:  2
+- Default: 2
-* Severity: WARNING
+- Severity: WARNING
 
-#### lowerCaseFileNames
+### lowerCaseFileNames
-On *nix systems, it is imperative that autocall macros are in lowercase.  When sharing code between windows and *nix systems, the difference in case sensitivity can also be a cause of lost developer time.  For this reason, we recommend that sas filenames are always lowercase.
 
-* Default: true
+On *nix systems, it is imperative that autocall macros are in lowercase. When sharing code between windows and *nix systems, the difference in case sensitivity can also be a cause of lost developer time. For this reason, we recommend that sas filenames are always lowercase.
-* Severity: WARNING
 
-#### maxLineLength
+- Default: true
-Code becomes far more readable when line lengths are short.  The most compelling reason for short line lengths is to avoid the need to scroll when performing a side-by-side 'compare' between two files (eg as part of a GIT feature branch review).  A longer discussion on optimal code line length can be found [here](https://stackoverflow.com/questions/578059/studies-on-optimal-code-width)
+- Severity: WARNING
+
+### maxLineLength
+
+Code becomes far more readable when line lengths are short. The most compelling reason for short line lengths is to avoid the need to scroll when performing a side-by-side 'compare' between two files (eg as part of a GIT feature branch review). A longer discussion on optimal code line length can be found [here](https://stackoverflow.com/questions/578059/studies-on-optimal-code-width)
 
 In batch mode, long SAS code lines may also be truncated, causing hard-to-detect errors.
 
-We strongly recommend a line length limit, and set the bar at 80.  To turn this feature off, set the value to 0.
+We strongly recommend a line length limit, and set the bar at 80. To turn this feature off, set the value to 0.
 
-* Default: 80
+- Default: 80
-* Severity: WARNING
+- Severity: WARNING
 
-#### noNestedMacros
+### noGremlins
-Where macros are defined inside other macros, they are recompiled every time the outer macro is invoked.  Hence, it is widely considered inefficient, and bad practice, to nest macro definitions.
 
-* Default:  true
+Capture zero-width whitespace and other non-standard characters.  The logic is borrowed from the [VSCode Gremlins Extension](https://github.com/nhoizey/vscode-gremlins) - if you are looking for more advanced gremlin zapping capabilities, we highly recommend to use their extension instead.
-* Severity: WARNING
+
+The list of characters can be found in this file: [https://github.com/sasjs/lint/blob/main/src/rules/line/noGremlins.ts](https://github.com/sasjs/lint/blob/main/src/rules/line/noGremlins.ts)
+
+- Default: true
+- Severity: WARNING
+
+### noNestedMacros
+
+Where macros are defined inside other macros, they are recompiled every time the outer macro is invoked. Hence, it is widely considered inefficient, and bad practice, to nest macro definitions.
+
+- Default: true
+- Severity: WARNING
+
+### noSpacesInFileNames
 
-#### noSpacesInFileNames
 The 'beef' we have with spaces in filenames is twofold:
 
-* Loss of the in-built ability to 'click' a filepath and have the file open automatically
+- Loss of the in-built ability to 'click' a filepath and have the file open automatically
-* The need to quote such filepaths in order to use them in CLI commands
+- The need to quote such filepaths in order to use them in CLI commands
 
-In addition, when such files are used in URLs, they are often padded with a messy "%20" type quotation.  And of course, for macros (where the macro should match the filename) then spaces are simply not valid.
+In addition, when such files are used in URLs, they are often padded with a messy "%20" type quotation. And of course, for macros (where the macro should match the filename) then spaces are simply not valid.
 
-* Default:  true
+- Default: true
-* Severity: WARNING
+- Severity: WARNING
 
-#### noTabIndentation
+### noTabs
-Whilst there are some arguments for using tabs to indent (such as the ability to set your own indentation width, and to reduce character count) there are many, many, many developers who think otherwise.  We're in that camp.  Sorry (not sorry).
 
-* Default:  true
+Whilst there are some arguments for using tabs (such as the ability to set your own indentation width, and to reduce character count) there are many, many, many developers who think otherwise. We're in that camp. Sorry (not sorry).
-* Severity: WARNING
 
-#### noTrailingSpaces
+- Alias: noTabIndentation
-This will highlight lines with trailing spaces.  Trailing spaces serve no useful purpose in a SAS program.
+- Default: true
+- Severity: WARNING
 
-* Default:  true
+### noTrailingSpaces
-* severity: WARNING
 
-### Upcoming Linting Rules:
+This will highlight lines with trailing spaces. Trailing spaces serve no useful purpose in a SAS program.
 
-* `noTabs` -> does what it says on the tin
+- Default: true
-* `noGremlins` -> identifies all invisible characters, other than spaces / tabs / line endings.  If you really need that bell character, use a hex literal!
+- severity: WARNING
-* `lineEndings` -> set a standard line ending, such as LF or CRLF
 
-## SAS Formatter
+## severityLevel
+
+This setting allows the default severity to be adjusted. This is helpful when running the lint in a pipeline or git hook. Simply list the rules you would like to adjust along with the desired setting ("warn" or "error"), eg as follows:
+
+```json
+{
+  "noTrailingSpaces": true,
+  "hasDoxygenHeader": true,
+  "maxLineLength": 100,
+  "severityLevel": {
+    "hasDoxygenHeader": "warn",
+    "maxLineLength": "error",
+    "noTrailingSpaces": "error"
+  }
+}
+```
+
+- "warn" - show warning in the log (doesn’t affect exit code)
+- "error" - show error in the log (exit code is 1 when triggered)
+
+## Upcoming Linting Rules:
+
+- `noGremlins` -> identifies all invisible characters, other than spaces / tabs / line endings. If you really need that bell character, use a hex literal!
+- `lineEndings` -> set a standard line ending, such as LF or CRLF
+
+# SAS Formatter
 
 A formatter will automatically apply rules when you hit SAVE, which can save a LOT of time.
 
 We've already implemented the following rules:
 
-* Add the macro name to the %mend statement
+- Add the macro name to the %mend statement
-* Add a doxygen header template if none exists
+- Add a doxygen header template if none exists
-* Remove trailing spaces
+- Remove trailing spaces
 
 We're looking to implement the following rules:
 
-* Change tabs to spaces
+- Change tabs to spaces
-* zap gremlins
+- zap gremlins
-* fix line endings
+- fix line endings
 
 We are also investigating some harder stuff, such as automatic indentation and code layout
 
-## Sponsorship & Contributions
+# Sponsorship & Contributions
 
-SASjs is an open source framework!  Contributions are welcomed.  If you would like to see a feature, because it would be useful in your project, but you don't have the requisite (Typescript) experience - then how about you engage us on a short project and we build it for you?
+SASjs is an open source framework! Contributions are welcomed. If you would like to see a feature, because it would be useful in your project, but you don't have the requisite (Typescript) experience - then how about you engage us on a short project and we build it for you?
 
 Contact [Allan Bowe](https://www.linkedin.com/in/allanbowe/) for further details.
 
+# Contributors ✨
 
-
-
-## Contributors ✨
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
+
 [![All Contributors](https://img.shields.io/badge/all_contributors-8-orange.svg?style=flat-square)](#contributors-)
+
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
+
 Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):
 
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->

sasjslint-schema.json

@@ -13,9 +13,10 @@
     "indentationMultiple": 2,
     "lowerCaseFileNames": true,
     "maxLineLength": 80,
+    "noGremlins": true,
     "noNestedMacros": true,
     "noSpacesInFileNames": true,
-    "noTabIndentation": true,
+    "noTabs": true,
     "noTrailingSpaces": true,
     "lineEndings": "lf",
     "strictMacroDefinition": true,
@@ -29,7 +30,8 @@
       "noSpacesInFileNames": true,
       "lowerCaseFileNames": true,
       "maxLineLength": 80,
-      "noTabIndentation": true,
+      "noGremlins": true,
+      "noTabs": true,
       "indentationMultiple": 4,
       "hasMacroNameInMend": true,
       "noNestedMacros": true,
@@ -64,6 +66,14 @@
       "default": "/**{lineEnding}  @file{lineEnding}  @brief <Your brief here>{lineEnding}  <h4> SAS Macros </h4>{lineEnding}**/",
       "examples": []
     },
+    "noGremlins": {
+      "$id": "#/properties/noGremlins",
+      "type": "boolean",
+      "title": "noGremlins",
+      "description": "Captures problematic characters such as zero-width whitespace and others that look valid but usually are not (such as the en dash)",
+      "default": [true],
+      "examples": [true, false]
+    },
     "hasMacroNameInMend": {
       "$id": "#/properties/hasMacroNameInMend",
       "type": "boolean",
@@ -120,11 +130,11 @@
       "default": true,
       "examples": [true, false]
     },
-    "noTabIndentation": {
+    "noTabs": {
-      "$id": "#/properties/noTabIndentation",
+      "$id": "#/properties/noTabs",
       "type": "boolean",
-      "title": "noTabIndentation",
+      "title": "noTabs",
-      "description": "Enforces no indentation using tabs. Shows a warning when a line starts with a tab.",
+      "description": "Enforces no indentation using tabs. Shows a warning when a line contains a tab.",
       "default": true,
       "examples": [true, false]
     },
@@ -159,6 +169,125 @@
       "description": "An array of paths or path patterns to ignore when linting. Any files or matching patterns in the .gitignore file will also be ignored.",
       "default": ["sasjsbuild/", "sasjsresults/"],
       "examples": ["sasjs/tests", "tmp/scratch.sas"]
+    },
+    "severityLevel": {
+      "$id": "#/properties/severityLevel",
+      "type": "object",
+      "title": "severityLevel",
+      "description": "An object which specifies the severity level of each rule.",
+      "default": {},
+      "examples": [
+        {
+          "hasDoxygenHeader": "warn",
+          "maxLineLength": "warn",
+          "noTrailingSpaces": "error"
+        },
+        {
+          "hasDoxygenHeader": "warn",
+          "maxLineLength": "error",
+          "noTrailingSpaces": "error"
+        }
+      ],
+      "properties": {
+        "noEncodedPasswords": {
+          "$id": "#/properties/severityLevel/noEncodedPasswords",
+          "title": "noEncodedPasswords",
+          "type": "string",
+          "enum": ["error", "warn"],
+          "default": "error"
+        },
+        "hasDoxygenHeader": {
+          "$id": "#/properties/severityLevel/hasDoxygenHeader",
+          "title": "hasDoxygenHeader",
+          "type": "string",
+          "enum": ["error", "warn"],
+          "default": "warn"
+        },
+        "noGremlins": {
+          "$id": "#/properties/severityLevel/noGremlins",
+          "title": "noGremlins",
+          "type": "string",
+          "enum": ["error", "warn"],
+          "default": "warn"
+        },
+        "hasMacroNameInMend": {
+          "$id": "#/properties/severityLevel/hasMacroNameInMend",
+          "title": "hasMacroNameInMend",
+          "type": "string",
+          "enum": ["error", "warn"],
+          "default": "warn"
+        },
+        "hasMacroParentheses": {
+          "$id": "#/properties/severityLevel/hasMacroParentheses",
+          "title": "hasMacroParentheses",
+          "type": "string",
+          "enum": ["error", "warn"],
+          "default": "warn"
+        },
+        "indentationMultiple": {
+          "$id": "#/properties/severityLevel/indentationMultiple",
+          "title": "indentationMultiple",
+          "type": "string",
+          "enum": ["error", "warn"],
+          "default": "warn"
+        },
+        "lowerCaseFileNames": {
+          "$id": "#/properties/severityLevel/lowerCaseFileNames",
+          "title": "lowerCaseFileNames",
+          "type": "string",
+          "enum": ["error", "warn"],
+          "default": "warn"
+        },
+        "maxLineLength": {
+          "$id": "#/properties/severityLevel/maxLineLength",
+          "title": "maxLineLength",
+          "type": "string",
+          "enum": ["error", "warn"],
+          "default": "warn"
+        },
+        "noNestedMacros": {
+          "$id": "#/properties/severityLevel/noNestedMacros",
+          "title": "noNestedMacros",
+          "type": "string",
+          "enum": ["error", "warn"],
+          "default": "warn"
+        },
+        "noSpacesInFileNames": {
+          "$id": "#/properties/severityLevel/noSpacesInFileNames",
+          "title": "noSpacesInFileNames",
+          "type": "string",
+          "enum": ["error", "warn"],
+          "default": "warn"
+        },
+        "noTabs": {
+          "$id": "#/properties/severityLevel/noTabs",
+          "title": "noTabs",
+          "type": "string",
+          "enum": ["error", "warn"],
+          "default": "warn"
+        },
+        "noTrailingSpaces": {
+          "$id": "#/properties/severityLevel/noTrailingSpaces",
+          "title": "noTrailingSpaces",
+          "type": "string",
+          "enum": ["error", "warn"],
+          "default": "warn"
+        },
+        "lineEndings": {
+          "$id": "#/properties/severityLevel/lineEndings",
+          "title": "lineEndings",
+          "type": "string",
+          "enum": ["error", "warn"],
+          "default": "warn"
+        },
+        "strictMacroDefinition": {
+          "$id": "#/properties/severityLevel/strictMacroDefinition",
+          "title": "strictMacroDefinition",
+          "type": "string",
+          "enum": ["error", "warn"],
+          "default": "warn"
+        }
+      }
     }
   }
 }

src/format/formatFile.spec.ts

@@ -32,16 +32,8 @@ describe('formatFile', () => {
     const expectedContent = `/**\r\n  @file\r\n  @brief <Your brief here>\r\n  <h4> SAS Macros </h4>\r\n**/\r\n%macro somemacro();\r\n%put 'hello';\r\n%mend;`
     const expectedResult = {
       updatedFilePaths: [path.join(__dirname, 'format-file-config.sas')],
-      fixedDiagnosticsCount: 2,
+      fixedDiagnosticsCount: 4,
-      unfixedDiagnostics: [
+      unfixedDiagnostics: []
-        {
-          endColumnNumber: 7,
-          lineNumber: 8,
-          message: '%mend statement is missing macro name - somemacro',
-          severity: 1,
-          startColumnNumber: 1
-        }
-      ]
     }
     await createFile(path.join(__dirname, 'format-file-config.sas'), content)
 

src/format/formatFile.ts

@@ -16,7 +16,7 @@ export const formatFile = async (
   configuration?: LintConfig
 ): Promise<FormatResult> => {
   const config = configuration || (await getLintConfig())
-  const diagnosticsBeforeFormat = await lintFile(filePath)
+  const diagnosticsBeforeFormat = await lintFile(filePath, config)
   const diagnosticsCountBeforeFormat = diagnosticsBeforeFormat.length
 
   const text = await readFile(filePath)
@@ -25,7 +25,7 @@ export const formatFile = async (
 
   await createFile(filePath, formattedText)
 
-  const diagnosticsAfterFormat = await lintFile(filePath)
+  const diagnosticsAfterFormat = await lintFile(filePath, config)
   const diagnosticsCountAfterFormat = diagnosticsAfterFormat.length
 
   const fixedDiagnosticsCount =

src/format/shared.ts

@@ -30,7 +30,7 @@ export const processLine = (config: LintConfig, line: string): string => {
   config.lineLintRules
     .filter((r) => !!r.fix)
     .forEach((rule) => {
-      processedLine = rule.fix!(line, config)
+      processedLine = rule.fix!(processedLine, config)
     })
 
   return processedLine

src/lint/lintFile.spec.ts

@@ -46,10 +46,10 @@ const expectedDiagnostics = [
     severity: Severity.Error
   },
   {
-    message: 'Line is indented with a tab',
+    message: 'Line contains a tab character (09x)',
     lineNumber: 7,
     startColumnNumber: 1,
-    endColumnNumber: 1,
+    endColumnNumber: 2,
     severity: Severity.Warning
   },
   {

src/lint/lintFolder.spec.ts

@@ -53,10 +53,10 @@ const expectedDiagnostics = [
     severity: Severity.Error
   },
   {
-    message: 'Line is indented with a tab',
+    message: 'Line contains a tab character (09x)',
     lineNumber: 7,
     startColumnNumber: 1,
-    endColumnNumber: 1,
+    endColumnNumber: 2,
     severity: Severity.Warning
   },
   {

src/lint/lintProject.spec.ts

@@ -51,10 +51,10 @@ const expectedDiagnostics = [
     severity: Severity.Error
   },
   {
-    message: 'Line is indented with a tab',
+    message: 'Line contains a tab character (09x)',
     lineNumber: 7,
     startColumnNumber: 1,
-    endColumnNumber: 1,
+    endColumnNumber: 2,
     severity: Severity.Warning
   },
   {

src/lint/shared.ts

@@ -18,7 +18,7 @@ export const processFile = (
 ): Diagnostic[] => {
   const diagnostics: Diagnostic[] = []
   config.pathLintRules.forEach((rule) => {
-    diagnostics.push(...rule.test(filePath))
+    diagnostics.push(...rule.test(filePath, config))
   })
 
   return diagnostics
@@ -27,7 +27,7 @@ export const processFile = (
 const processContent = (config: LintConfig, content: string): Diagnostic[] => {
   const diagnostics: Diagnostic[] = []
   config.fileLintRules.forEach((rule) => {
-    diagnostics.push(...rule.test(content))
+    diagnostics.push(...rule.test(content, config))
   })
 
   return diagnostics

src/rules/file/hasDoxygenHeader.ts

@@ -11,8 +11,11 @@ const description =
 const message = 'File missing Doxygen header'
 const messageForSingleAsterisk =
   'File not following Doxygen header style, use double asterisks'
+
 const test = (value: string, config?: LintConfig) => {
   const lineEnding = config?.lineEndings === LineEndings.CRLF ? '\r\n' : '\n'
+  const severity = config?.severityLevel[name] || Severity.Warning
+
   try {
     const hasFileHeader = value.trimStart().startsWith('/**')
     if (hasFileHeader) return []
@@ -27,7 +30,7 @@ const test = (value: string, config?: LintConfig) => {
               .length + 1,
           startColumnNumber: 1,
           endColumnNumber: 1,
-          severity: Severity.Warning
+          severity
         }
       ]
 
@@ -37,7 +40,7 @@ const test = (value: string, config?: LintConfig) => {
         lineNumber: 1,
         startColumnNumber: 1,
         endColumnNumber: 1,
-        severity: Severity.Warning
+        severity
       }
     ]
   } catch (e) {
@@ -47,7 +50,7 @@ const test = (value: string, config?: LintConfig) => {
         lineNumber: 1,
         startColumnNumber: 1,
         endColumnNumber: 1,
-        severity: Severity.Warning
+        severity
       }
     ]
   }

src/rules/file/hasMacroNameInMend.ts

@@ -11,11 +11,14 @@ const name = 'hasMacroNameInMend'
 const description =
   'Enforces the presence of the macro name in each %mend statement.'
 const message = '%mend statement has missing or incorrect macro name'
+
 const test = (value: string, config?: LintConfig) => {
   const lineEnding = config?.lineEndings === LineEndings.CRLF ? '\r\n' : '\n'
   const lines: string[] = value ? value.split(lineEnding) : []
   const macros = parseMacros(value, config)
+  const severity = config?.severityLevel[name] || Severity.Warning
   const diagnostics: Diagnostic[] = []
+
   macros.forEach((macro) => {
     if (macro.startLineNumbers.length === 0 && macro.endLineNumber !== null) {
       const endLine = lines[macro.endLineNumber - 1]
@@ -25,7 +28,7 @@ const test = (value: string, config?: LintConfig) => {
         startColumnNumber: getColumnNumber(endLine, '%mend'),
         endColumnNumber:
           getColumnNumber(endLine, '%mend') + macro.termination.length,
-        severity: Severity.Warning
+        severity
       })
     } else if (
       macro.endLineNumber === null &&
@@ -36,7 +39,7 @@ const test = (value: string, config?: LintConfig) => {
         lineNumber: macro.startLineNumbers![0],
         startColumnNumber: 1,
         endColumnNumber: 1,
-        severity: Severity.Warning
+        severity
       })
     } else if (macro.mismatchedMendMacroName) {
       const endLine = lines[(macro.endLineNumber as number) - 1]
@@ -53,7 +56,7 @@ const test = (value: string, config?: LintConfig) => {
           getColumnNumber(endLine, macro.mismatchedMendMacroName) +
           macro.mismatchedMendMacroName.length -
           1,
-        severity: Severity.Warning
+        severity
       })
     } else if (!macro.hasMacroNameInMend) {
       const endLine = lines[(macro.endLineNumber as number) - 1]
@@ -62,7 +65,7 @@ const test = (value: string, config?: LintConfig) => {
         lineNumber: macro.endLineNumber as number,
         startColumnNumber: getColumnNumber(endLine, '%mend'),
         endColumnNumber: getColumnNumber(endLine, '%mend') + 6,
-        severity: Severity.Warning
+        severity
       })
     }
   })

src/rules/file/hasMacroParentheses.ts

@@ -9,9 +9,12 @@ import { LintConfig } from '../../types'
 const name = 'hasMacroParentheses'
 const description = 'Enforces the presence of parentheses in macro definitions.'
 const message = 'Macro definition missing parentheses'
+
 const test = (value: string, config?: LintConfig) => {
   const diagnostics: Diagnostic[] = []
   const macros = parseMacros(value, config)
+  const severity = config?.severityLevel[name] || Severity.Warning
+
   macros.forEach((macro) => {
     if (!macro.name) {
       diagnostics.push({
@@ -24,7 +27,7 @@ const test = (value: string, config?: LintConfig) => {
         endColumnNumber:
           getColumnNumber(macro.declarationLines![0], '%macro') +
           macro.declaration.length,
-        severity: Severity.Warning
+        severity
       })
     } else if (!macro.declarationLines.find((dl) => dl.includes('('))) {
       const macroNameLineIndex = macro.declarationLines.findIndex((dl) =>
@@ -44,7 +47,7 @@ const test = (value: string, config?: LintConfig) => {
           ) +
           macro.name.length -
           1,
-        severity: Severity.Warning
+        severity
       })
     }
   })

src/rules/file/lineEndings.ts

@@ -7,6 +7,7 @@ import { Severity } from '../../types/Severity'
 const name = 'lineEndings'
 const description = 'Ensures line endings conform to the configured type.'
 const message = 'Incorrect line ending - {actual} instead of {expected}'
+
 const test = (value: string, config?: LintConfig) => {
   const lineEndingConfig = config?.lineEndings || LineEndings.LF
   const expectedLineEnding =
@@ -18,8 +19,10 @@ const test = (value: string, config?: LintConfig) => {
     .replace(/\n/g, '{lf}')
     .split(new RegExp(`(?<=${expectedLineEnding})`))
   const diagnostics: Diagnostic[] = []
+  const severity = config?.severityLevel[name] || Severity.Warning
 
   let indexOffset = 0
+
   lines.forEach((line, index) => {
     if (line.endsWith(incorrectLineEnding)) {
       diagnostics.push({
@@ -29,7 +32,7 @@ const test = (value: string, config?: LintConfig) => {
         lineNumber: index + 1 + indexOffset,
         startColumnNumber: line.indexOf(incorrectLineEnding),
         endColumnNumber: line.indexOf(incorrectLineEnding) + 1,
-        severity: Severity.Warning
+        severity
       })
     } else {
       const splitLine = line.split(new RegExp(`(?<=${incorrectLineEnding})`))
@@ -51,7 +54,7 @@ const test = (value: string, config?: LintConfig) => {
             lineNumber: index + i + 1,
             startColumnNumber: l.indexOf(incorrectLineEnding),
             endColumnNumber: l.indexOf(incorrectLineEnding) + 1,
-            severity: Severity.Warning
+            severity
           })
         }
       })

src/rules/file/noNestedMacros.ts

@@ -10,11 +10,14 @@ import { LineEndings } from '../../types/LineEndings'
 const name = 'noNestedMacros'
 const description = 'Enfoces the absence of nested macro definitions.'
 const message = `Macro definition for '{macro}' present in macro '{parent}'`
+
 const test = (value: string, config?: LintConfig) => {
   const lineEnding = config?.lineEndings === LineEndings.CRLF ? '\r\n' : '\n'
   const lines: string[] = value ? value.split(lineEnding) : []
   const diagnostics: Diagnostic[] = []
   const macros = parseMacros(value, config)
+  const severity = config?.severityLevel[name] || Severity.Warning
+
   macros
     .filter((m) => !!m.parentMacro)
     .forEach((macro) => {
@@ -34,7 +37,7 @@ const test = (value: string, config?: LintConfig) => {
           ) +
           lines[(macro.startLineNumbers![0] as number) - 1].trim().length -
           1,
-        severity: Severity.Warning
+        severity
       })
     })
   return diagnostics

src/rules/file/strictMacroDefinition.ts

@@ -25,9 +25,11 @@ const validOptions = [
 const processParams = (
   content: string,
   macro: Macro,
-  diagnostics: Diagnostic[]
+  diagnostics: Diagnostic[],
+  config?: LintConfig
 ): string => {
   const declaration = macro.declaration
+  const severity = config?.severityLevel[name] || Severity.Warning
 
   const regExpParams = new RegExp(/(?<=\().*(?=\))/)
   const regExpParamsResult = regExpParams.exec(declaration)
@@ -88,7 +90,7 @@ const processParams = (
           lineNumber: paramLineNumber,
           startColumnNumber: paramStartIndex + 1,
           endColumnNumber: paramEndIndex,
-          severity: Severity.Warning
+          severity
         })
       }
     })
@@ -101,9 +103,11 @@ const processParams = (
 const processOptions = (
   _declaration: string,
   macro: Macro,
-  diagnostics: Diagnostic[]
+  diagnostics: Diagnostic[],
+  config?: LintConfig
 ): void => {
   let optionsPresent = _declaration.split('/')?.[1]?.trim()
+  const severity = config?.severityLevel[name] || Severity.Warning
 
   if (optionsPresent) {
     const regex = new RegExp(/="(.*?)"/, 'g')
@@ -136,7 +140,7 @@ const processOptions = (
             startColumnNumber: declarationLine.indexOf(trimmedOption) + 1,
             endColumnNumber:
               declarationLine.indexOf(trimmedOption) + trimmedOption.length,
-            severity: Severity.Warning
+            severity
           })
         }
       })
@@ -149,9 +153,9 @@ const test = (value: string, config?: LintConfig) => {
   const macros = parseMacros(value, config)
 
   macros.forEach((macro) => {
-    const _declaration = processParams(value, macro, diagnostics)
+    const _declaration = processParams(value, macro, diagnostics, config)
 
-    processOptions(_declaration, macro, diagnostics)
+    processOptions(_declaration, macro, diagnostics, config)
   })
 
   return diagnostics

src/rules/line/indentationMultiple.ts

@@ -6,9 +6,11 @@ import { Severity } from '../../types/Severity'
 const name = 'indentationMultiple'
 const description = 'Ensure indentation by a multiple of the configured number.'
 const message = 'Line has incorrect indentation'
+
 const test = (value: string, lineNumber: number, config?: LintConfig) => {
   if (!value.startsWith(' ')) return []
 
+  const severity = config?.severityLevel[name] || Severity.Warning
   const indentationMultiple = isNaN(config?.indentationMultiple as number)
     ? 2
     : config!.indentationMultiple
@@ -24,7 +26,7 @@ const test = (value: string, lineNumber: number, config?: LintConfig) => {
       lineNumber,
       startColumnNumber: 1,
       endColumnNumber: 1,
-      severity: Severity.Warning
+      severity
     }
   ]
 }

src/rules/line/index.ts

@@ -1,5 +1,6 @@
+export { noGremlins } from './noGremlins'
 export { indentationMultiple } from './indentationMultiple'
 export { maxLineLength } from './maxLineLength'
 export { noEncodedPasswords } from './noEncodedPasswords'
-export { noTabIndentation } from './noTabIndentation'
+export { noTabs } from './noTabs'
 export { noTrailingSpaces } from './noTrailingSpaces'

src/rules/line/maxLineLength.ts

@@ -6,7 +6,9 @@ import { Severity } from '../../types/Severity'
 const name = 'maxLineLength'
 const description = 'Restrict lines to the specified length.'
 const message = 'Line exceeds maximum length'
+
 const test = (value: string, lineNumber: number, config?: LintConfig) => {
+  const severity = config?.severityLevel[name] || Severity.Warning
   const maxLineLength = config?.maxLineLength || 80
   if (value.length <= maxLineLength) return []
   return [
@@ -15,7 +17,7 @@ const test = (value: string, lineNumber: number, config?: LintConfig) => {
       lineNumber,
       startColumnNumber: 1,
       endColumnNumber: 1,
-      severity: Severity.Warning
+      severity
     }
   ]
 }

src/rules/line/noEncodedPasswords.ts

@@ -1,3 +1,4 @@
+import { LintConfig } from '../../types'
 import { LineLintRule } from '../../types/LintRule'
 import { LintRuleType } from '../../types/LintRuleType'
 import { Severity } from '../../types/Severity'
@@ -5,7 +6,9 @@ import { Severity } from '../../types/Severity'
 const name = 'noEncodedPasswords'
 const description = 'Disallow encoded passwords in SAS code.'
 const message = 'Line contains encoded password'
-const test = (value: string, lineNumber: number) => {
+
+const test = (value: string, lineNumber: number, config?: LintConfig) => {
+  const severity = config?.severityLevel[name] || Severity.Error
   const regex = new RegExp(/{sas(\d{2,4}|enc)}[^;"'\s]*/, 'gi')
   const matches = value.match(regex)
   if (!matches || !matches.length) return []
@@ -14,7 +17,7 @@ const test = (value: string, lineNumber: number) => {
     lineNumber,
     startColumnNumber: value.indexOf(match) + 1,
     endColumnNumber: value.indexOf(match) + match.length + 1,
-    severity: Severity.Error
+    severity
   }))
 }
 

src/rules/line/noGremlins.spec.ts

@@ -0,0 +1,15 @@
+import { Severity } from '../../types/Severity'
+import { noGremlins } from './noGremlins'
+
+describe('noTabs', () => {
+  it('should return an empty array when the line does not have any gremlin', () => {
+    const line = "%put 'hello';"
+    expect(noGremlins.test(line, 1)).toEqual([])
+  })
+
+  it('should return a diagnostic array when the line contains gremlins', () => {
+    const line = "–  ‘ %put 'hello';"
+    const diagnostics = noGremlins.test(line, 1)
+    expect(diagnostics.length).toEqual(2)
+  })
+})

src/rules/line/noGremlins.ts

@@ -0,0 +1,59 @@
+import { Diagnostic, LintConfig } from '../../types'
+import { LineLintRule } from '../../types/LintRule'
+import { LintRuleType } from '../../types/LintRuleType'
+import { Severity } from '../../types/Severity'
+import { gremlinCharacters } from '../../utils'
+
+const name = 'noGremlins'
+const description = 'Disallow characters specified in gremlins array'
+const message = 'Line contains a gremlin'
+
+const test = (value: string, lineNumber: number, config?: LintConfig) => {
+  const severity = config?.severityLevel[name] || Severity.Warning
+
+  const diagnostics: Diagnostic[] = []
+
+  const gremlins: any = {}
+
+  for (const [hexCode, config] of Object.entries(gremlinCharacters)) {
+    gremlins[charFromHex(hexCode)] = Object.assign({}, config, {
+      hexCode
+    })
+  }
+
+  const regexpWithAllChars = new RegExp(
+    Object.keys(gremlins)
+      .map((char) => `${char}+`)
+      .join('|'),
+    'g'
+  )
+
+  let match
+  while ((match = regexpWithAllChars.exec(value))) {
+    const matchedCharacter = match[0][0]
+    const gremlin = gremlins[matchedCharacter]
+
+    diagnostics.push({
+      message: `${message}: ${gremlin.description}, hexCode(${gremlin.hexCode})`,
+      lineNumber,
+      startColumnNumber: match.index + 1,
+      endColumnNumber: match.index + 1 + match[0].length,
+      severity
+    })
+  }
+
+  return diagnostics
+}
+
+/**
+ * Lint rule that checks if a given line of text contains any gremlins.
+ */
+export const noGremlins: LineLintRule = {
+  type: LintRuleType.Line,
+  name,
+  description,
+  message,
+  test
+}
+
+const charFromHex = (hexCode: string) => String.fromCodePoint(parseInt(hexCode))

src/rules/line/noTabIndentation.ts

@@ -1,30 +0,0 @@
-import { LineLintRule } from '../../types/LintRule'
-import { LintRuleType } from '../../types/LintRuleType'
-import { Severity } from '../../types/Severity'
-
-const name = 'noTabs'
-const description = 'Disallow indenting with tabs.'
-const message = 'Line is indented with a tab'
-const test = (value: string, lineNumber: number) => {
-  if (!value.startsWith('\t')) return []
-  return [
-    {
-      message,
-      lineNumber,
-      startColumnNumber: 1,
-      endColumnNumber: 1,
-      severity: Severity.Warning
-    }
-  ]
-}
-
-/**
- * Lint rule that checks if a given line of text is indented with a tab.
- */
-export const noTabIndentation: LineLintRule = {
-  type: LintRuleType.Line,
-  name,
-  description,
-  message,
-  test
-}

src/rules/line/noTabs.spec.ts

@@ -1,20 +1,20 @@
 import { Severity } from '../../types/Severity'
-import { noTabIndentation } from './noTabIndentation'
+import { noTabs } from './noTabs'
 
 describe('noTabs', () => {
   it('should return an empty array when the line is not indented with a tab', () => {
     const line = "%put 'hello';"
-    expect(noTabIndentation.test(line, 1)).toEqual([])
+    expect(noTabs.test(line, 1)).toEqual([])
   })
 
   it('should return an array with a single diagnostic when the line is indented with a tab', () => {
     const line = "\t%put 'hello';"
-    expect(noTabIndentation.test(line, 1)).toEqual([
+    expect(noTabs.test(line, 1)).toEqual([
       {
-        message: 'Line is indented with a tab',
+        message: 'Line contains a tab character (09x)',
         lineNumber: 1,
         startColumnNumber: 1,
-        endColumnNumber: 1,
+        endColumnNumber: 2,
         severity: Severity.Warning
       }
     ])

src/rules/line/noTabs.ts

@@ -0,0 +1,38 @@
+import { LintConfig } from '../../types'
+import { LineLintRule } from '../../types/LintRule'
+import { LintRuleType } from '../../types/LintRuleType'
+import { Severity } from '../../types/Severity'
+import { getIndicesOf } from '../../utils'
+
+const name = 'noTabs'
+const alias = 'noTabIndentation'
+const description = 'Disallow indenting with tabs.'
+const message = 'Line contains a tab character (09x)'
+
+const test = (value: string, lineNumber: number, config?: LintConfig) => {
+  const severity =
+    config?.severityLevel[name] ||
+    config?.severityLevel[alias] ||
+    Severity.Warning
+
+  const indices = getIndicesOf('\t', value)
+
+  return indices.map((index) => ({
+    message,
+    lineNumber,
+    startColumnNumber: index + 1,
+    endColumnNumber: index + 2,
+    severity
+  }))
+}
+
+/**
+ * Lint rule that checks if a given line of text is indented with a tab.
+ */
+export const noTabs: LineLintRule = {
+  type: LintRuleType.Line,
+  name,
+  description,
+  message,
+  test
+}

src/rules/line/noTrailingSpaces.ts

@@ -1,3 +1,4 @@
+import { LintConfig } from '../../types'
 import { LineLintRule } from '../../types/LintRule'
 import { LintRuleType } from '../../types/LintRuleType'
 import { Severity } from '../../types/Severity'
@@ -5,8 +6,11 @@ import { Severity } from '../../types/Severity'
 const name = 'noTrailingSpaces'
 const description = 'Disallow trailing spaces on lines.'
 const message = 'Line contains trailing spaces'
-const test = (value: string, lineNumber: number) =>
+
-  value.trimEnd() === value
+const test = (value: string, lineNumber: number, config?: LintConfig) => {
+  const severity = config?.severityLevel[name] || Severity.Warning
+
+  return value.trimEnd() === value
     ? []
     : [
         {
@@ -14,9 +18,11 @@ const test = (value: string, lineNumber: number) =>
           lineNumber,
           startColumnNumber: value.trimEnd().length + 1,
           endColumnNumber: value.length,
-          severity: Severity.Warning
+          severity
         }
       ]
+}
+
 const fix = (value: string) => value.trimEnd()
 
 /**

src/rules/path/lowerCaseFileNames.ts

@@ -2,20 +2,25 @@ import { PathLintRule } from '../../types/LintRule'
 import { LintRuleType } from '../../types/LintRuleType'
 import { Severity } from '../../types/Severity'
 import path from 'path'
+import { LintConfig } from '../../types'
 
 const name = 'lowerCaseFileNames'
 const description = 'Enforce the use of lower case file names.'
 const message = 'File name contains uppercase characters'
-const test = (value: string) => {
+
+const test = (value: string, config?: LintConfig) => {
+  const severity = config?.severityLevel[name] || Severity.Warning
   const fileName = path.basename(value)
+
   if (fileName.toLocaleLowerCase() === fileName) return []
+
   return [
     {
       message,
       lineNumber: 1,
       startColumnNumber: 1,
       endColumnNumber: 1,
-      severity: Severity.Warning
+      severity
     }
   ]
 }

src/rules/path/noSpacesInFileNames.ts

@@ -2,12 +2,16 @@ import { PathLintRule } from '../../types/LintRule'
 import { LintRuleType } from '../../types/LintRuleType'
 import { Severity } from '../../types/Severity'
 import path from 'path'
+import { LintConfig } from '../../types'
 
 const name = 'noSpacesInFileNames'
 const description = 'Enforce the absence of spaces within file names.'
 const message = 'File name contains spaces'
-const test = (value: string) => {
+
+const test = (value: string, config?: LintConfig) => {
+  const severity = config?.severityLevel[name] || Severity.Warning
   const fileName = path.basename(value)
+
   if (fileName.includes(' ')) {
     return [
       {
@@ -15,7 +19,7 @@ const test = (value: string) => {
         lineNumber: 1,
         startColumnNumber: 1,
         endColumnNumber: 1,
-        severity: Severity.Warning
+        severity
       }
     ]
   }

src/types/LintConfig.spec.ts

@@ -1,98 +1,78 @@
 import { LineEndings } from './LineEndings'
 import { LintConfig } from './LintConfig'
 import { LintRuleType } from './LintRuleType'
+import { Severity } from './Severity'
 
 describe('LintConfig', () => {
-  it('should create an empty instance', () => {
+  it('should create an instance with default values when no configuration is provided', () => {
     const config = new LintConfig()
-
     expect(config).toBeTruthy()
-    expect(config.fileLintRules.length).toEqual(0)
-    expect(config.lineLintRules.length).toEqual(0)
   })
 
-  it('should create an instance with the noTrailingSpaces flag set', () => {
+  it('should create an instance with the noTrailingSpaces flag off', () => {
-    const config = new LintConfig({ noTrailingSpaces: true })
+    const config = new LintConfig({ noTrailingSpaces: false })
 
     expect(config).toBeTruthy()
-    expect(config.lineLintRules.length).toEqual(1)
+    expect(config.lineLintRules.length).toBeGreaterThan(0)
-    expect(config.lineLintRules[0].name).toEqual('noTrailingSpaces')
+    expect(config.fileLintRules.length).toBeGreaterThan(0)
-    expect(config.lineLintRules[0].type).toEqual(LintRuleType.Line)
+    expect(
-    expect(config.fileLintRules.length).toEqual(0)
+      config.lineLintRules.find((rule) => rule.name === 'noTrailingSpaces')
+    ).toBeUndefined()
   })
 
-  it('should create an instance with the noEncodedPasswords flag set', () => {
+  it('should create an instance with the noEncodedPasswords flag off', () => {
-    const config = new LintConfig({ noEncodedPasswords: true })
+    const config = new LintConfig({ noEncodedPasswords: false })
 
     expect(config).toBeTruthy()
-    expect(config.lineLintRules.length).toEqual(1)
+    expect(config.lineLintRules.length).toBeGreaterThan(0)
-    expect(config.lineLintRules[0].name).toEqual('noEncodedPasswords')
+    expect(config.fileLintRules.length).toBeGreaterThan(0)
-    expect(config.lineLintRules[0].type).toEqual(LintRuleType.Line)
+    expect(
-    expect(config.fileLintRules.length).toEqual(0)
+      config.lineLintRules.find((rule) => rule.name === 'noEncodedPasswords')
+    ).toBeUndefined()
   })
 
-  it('should create an instance with the hasDoxygenHeader flag set', () => {
+  it('should create an instance with the hasDoxygenHeader flag off', () => {
-    const config = new LintConfig({ hasDoxygenHeader: true })
+    const config = new LintConfig({ hasDoxygenHeader: false })
 
     expect(config).toBeTruthy()
-    expect(config.lineLintRules.length).toEqual(0)
+    expect(config.lineLintRules.length).toBeGreaterThan(0)
-    expect(config.fileLintRules.length).toEqual(1)
+    expect(config.fileLintRules.length).toBeGreaterThan(0)
-    expect(config.fileLintRules[0].name).toEqual('hasDoxygenHeader')
+    expect(
-    expect(config.fileLintRules[0].type).toEqual(LintRuleType.File)
+      config.fileLintRules.find((rule) => rule.name === 'hasDoxygenHeader')
-  })
+    ).toBeUndefined()
-
-  it('should create an instance with the hasMacroNameInMend flag set', () => {
-    const config = new LintConfig({ hasMacroNameInMend: true })
-
-    expect(config).toBeTruthy()
-    expect(config.lineLintRules.length).toEqual(0)
-    expect(config.fileLintRules.length).toEqual(1)
-    expect(config.fileLintRules[0].name).toEqual('hasMacroNameInMend')
-    expect(config.fileLintRules[0].type).toEqual(LintRuleType.File)
   })
 
   it('should create an instance with the hasMacroNameInMend flag off', () => {
     const config = new LintConfig({ hasMacroNameInMend: false })
 
     expect(config).toBeTruthy()
-    expect(config.lineLintRules.length).toEqual(0)
+    expect(config.lineLintRules.length).toBeGreaterThan(0)
-    expect(config.fileLintRules.length).toEqual(0)
+    expect(config.fileLintRules.length).toBeGreaterThan(0)
-  })
+    expect(
-
+      config.fileLintRules.find((rule) => rule.name === 'hasMacroNameInMend')
-  it('should create an instance with the noNestedMacros flag set', () => {
+    ).toBeUndefined()
-    const config = new LintConfig({ noNestedMacros: true })
-
-    expect(config).toBeTruthy()
-    expect(config.lineLintRules.length).toEqual(0)
-    expect(config.fileLintRules.length).toEqual(1)
-    expect(config.fileLintRules[0].name).toEqual('noNestedMacros')
-    expect(config.fileLintRules[0].type).toEqual(LintRuleType.File)
   })
 
   it('should create an instance with the noNestedMacros flag off', () => {
     const config = new LintConfig({ noNestedMacros: false })
 
     expect(config).toBeTruthy()
-    expect(config.lineLintRules.length).toEqual(0)
+    expect(config.lineLintRules.length).toBeGreaterThan(0)
-    expect(config.fileLintRules.length).toEqual(0)
+    expect(config.fileLintRules.length).toBeGreaterThan(0)
-  })
+    expect(
-
+      config.fileLintRules.find((rule) => rule.name === 'noNestedMacros')
-  it('should create an instance with the hasMacroParentheses flag set', () => {
+    ).toBeUndefined()
-    const config = new LintConfig({ hasMacroParentheses: true })
-
-    expect(config).toBeTruthy()
-    expect(config.lineLintRules.length).toEqual(0)
-    expect(config.fileLintRules.length).toEqual(1)
-    expect(config.fileLintRules[0].name).toEqual('hasMacroParentheses')
-    expect(config.fileLintRules[0].type).toEqual(LintRuleType.File)
   })
 
   it('should create an instance with the hasMacroParentheses flag off', () => {
     const config = new LintConfig({ hasMacroParentheses: false })
 
     expect(config).toBeTruthy()
-    expect(config.lineLintRules.length).toEqual(0)
+    expect(config.lineLintRules.length).toBeGreaterThan(0)
-    expect(config.fileLintRules.length).toEqual(0)
+    expect(config.fileLintRules.length).toBeGreaterThan(0)
+    expect(
+      config.fileLintRules.find((rule) => rule.name === 'hasMacroParentheses')
+    ).toBeUndefined()
   })
 
   it('should create an instance with the indentation multiple set', () => {
@@ -123,6 +103,23 @@ describe('LintConfig', () => {
     expect(config.lineEndings).toEqual(LineEndings.CRLF)
   })
 
+  it('should create an instance with the severityLevel config', () => {
+    const config = new LintConfig({
+      severityLevel: {
+        hasDoxygenHeader: 'warn',
+        maxLineLength: 'error',
+        noTrailingSpaces: 'error'
+      }
+    })
+
+    expect(config).toBeTruthy()
+    expect(config.severityLevel).toEqual({
+      hasDoxygenHeader: Severity.Warning,
+      maxLineLength: Severity.Error,
+      noTrailingSpaces: Severity.Error
+    })
+  })
+
   it('should create an instance with the line endings set to LF by default', () => {
     const config = new LintConfig({})
 
@@ -148,11 +145,12 @@ describe('LintConfig', () => {
       indentationMultiple: 2,
       hasMacroNameInMend: true,
       noNestedMacros: true,
-      hasMacroParentheses: true
+      hasMacroParentheses: true,
+      noGremlins: true
     })
 
     expect(config).toBeTruthy()
-    expect(config.lineLintRules.length).toEqual(5)
+    expect(config.lineLintRules.length).toEqual(6)
     expect(config.lineLintRules[0].name).toEqual('noTrailingSpaces')
     expect(config.lineLintRules[0].type).toEqual(LintRuleType.Line)
     expect(config.lineLintRules[1].name).toEqual('noEncodedPasswords')
@@ -163,16 +161,22 @@ describe('LintConfig', () => {
     expect(config.lineLintRules[3].type).toEqual(LintRuleType.Line)
     expect(config.lineLintRules[4].name).toEqual('indentationMultiple')
     expect(config.lineLintRules[4].type).toEqual(LintRuleType.Line)
+    expect(config.lineLintRules[5].name).toEqual('noGremlins')
+    expect(config.lineLintRules[5].type).toEqual(LintRuleType.Line)
 
-    expect(config.fileLintRules.length).toEqual(4)
+    expect(config.fileLintRules.length).toEqual(6)
-    expect(config.fileLintRules[0].name).toEqual('hasDoxygenHeader')
+    expect(config.fileLintRules[0].name).toEqual('lineEndings')
     expect(config.fileLintRules[0].type).toEqual(LintRuleType.File)
-    expect(config.fileLintRules[1].name).toEqual('hasMacroNameInMend')
+    expect(config.fileLintRules[1].name).toEqual('hasDoxygenHeader')
     expect(config.fileLintRules[1].type).toEqual(LintRuleType.File)
-    expect(config.fileLintRules[2].name).toEqual('noNestedMacros')
+    expect(config.fileLintRules[2].name).toEqual('hasMacroNameInMend')
     expect(config.fileLintRules[2].type).toEqual(LintRuleType.File)
-    expect(config.fileLintRules[3].name).toEqual('hasMacroParentheses')
+    expect(config.fileLintRules[3].name).toEqual('noNestedMacros')
     expect(config.fileLintRules[3].type).toEqual(LintRuleType.File)
+    expect(config.fileLintRules[4].name).toEqual('hasMacroParentheses')
+    expect(config.fileLintRules[4].type).toEqual(LintRuleType.File)
+    expect(config.fileLintRules[5].name).toEqual('strictMacroDefinition')
+    expect(config.fileLintRules[5].type).toEqual(LintRuleType.File)
 
     expect(config.pathLintRules.length).toEqual(2)
     expect(config.pathLintRules[0].name).toEqual('noSpacesInFileNames')

src/types/LintConfig.ts

@@ -10,13 +10,15 @@ import {
   indentationMultiple,
   maxLineLength,
   noEncodedPasswords,
-  noTabIndentation,
+  noTabs,
-  noTrailingSpaces
+  noTrailingSpaces,
+  noGremlins
 } from '../rules/line'
 import { lowerCaseFileNames, noSpacesInFileNames } from '../rules/path'
 import { LineEndings } from './LineEndings'
 import { FileLintRule, LineLintRule, PathLintRule } from './LintRule'
 import { getDefaultHeader } from '../utils'
+import { Severity } from './Severity'
 
 /**
  * LintConfig is the logical representation of the .sasjslint file.
@@ -34,6 +36,7 @@ export class LintConfig {
   readonly indentationMultiple: number = 2
   readonly lineEndings: LineEndings = LineEndings.LF
   readonly defaultHeader: string = getDefaultHeader()
+  readonly severityLevel: { [key: string]: Severity } = {}
 
   constructor(json?: any) {
     if (json?.ignoreList) {
@@ -50,23 +53,25 @@ export class LintConfig {
       }
     }
 
-    if (json?.noTrailingSpaces) {
+    if (json?.noTrailingSpaces !== false) {
       this.lineLintRules.push(noTrailingSpaces)
     }
 
-    if (json?.noEncodedPasswords) {
+    if (json?.noEncodedPasswords !== false) {
       this.lineLintRules.push(noEncodedPasswords)
     }
 
-    if (json?.noTabIndentation) {
+    this.lineLintRules.push(noTabs)
-      this.lineLintRules.push(noTabIndentation)
+    if (json?.noTabs === false || json?.noTabIndentation === false) {
+      this.lineLintRules.pop()
     }
 
-    if (json?.maxLineLength) {
+    this.lineLintRules.push(maxLineLength)
+    if (!isNaN(json?.maxLineLength)) {
       this.maxLineLength = json.maxLineLength
-      this.lineLintRules.push(maxLineLength)
     }
 
+    this.fileLintRules.push(lineEndings)
     if (json?.lineEndings) {
       if (
         json.lineEndings !== LineEndings.LF &&
@@ -77,15 +82,14 @@ export class LintConfig {
         )
       }
       this.lineEndings = json.lineEndings
-      this.fileLintRules.push(lineEndings)
     }
 
+    this.lineLintRules.push(indentationMultiple)
     if (!isNaN(json?.indentationMultiple)) {
       this.indentationMultiple = json.indentationMultiple as number
-      this.lineLintRules.push(indentationMultiple)
     }
 
-    if (json?.hasDoxygenHeader) {
+    if (json?.hasDoxygenHeader !== false) {
       this.fileLintRules.push(hasDoxygenHeader)
     }
 
@@ -93,11 +97,11 @@ export class LintConfig {
       this.defaultHeader = json.defaultHeader
     }
 
-    if (json?.noSpacesInFileNames) {
+    if (json?.noSpacesInFileNames !== false) {
       this.pathLintRules.push(noSpacesInFileNames)
     }
 
-    if (json?.lowerCaseFileNames) {
+    if (json?.lowerCaseFileNames !== false) {
       this.pathLintRules.push(lowerCaseFileNames)
     }
 
@@ -105,16 +109,27 @@ export class LintConfig {
       this.fileLintRules.push(hasMacroNameInMend)
     }
 
-    if (json?.noNestedMacros) {
+    if (json?.noNestedMacros !== false) {
       this.fileLintRules.push(noNestedMacros)
     }
 
-    if (json?.hasMacroParentheses) {
+    if (json?.hasMacroParentheses !== false) {
       this.fileLintRules.push(hasMacroParentheses)
     }
 
-    if (json?.strictMacroDefinition) {
+    if (json?.strictMacroDefinition !== false) {
       this.fileLintRules.push(strictMacroDefinition)
     }
+
+    if (json?.noGremlins !== false) {
+      this.lineLintRules.push(noGremlins)
+    }
+
+    if (json?.severityLevel) {
+      for (const [rule, severity] of Object.entries(json.severityLevel)) {
+        if (severity === 'warn') this.severityLevel[rule] = Severity.Warning
+        if (severity === 'error') this.severityLevel[rule] = Severity.Error
+      }
+    }
   }
 }

src/types/LintRule.ts

@@ -36,5 +36,5 @@ export interface FileLintRule extends LintRule {
  */
 export interface PathLintRule extends LintRule {
   type: LintRuleType.Path
-  test: (value: string) => Diagnostic[]
+  test: (value: string, config?: LintConfig) => Diagnostic[]
 }

src/utils/getIndicesOf.ts

@@ -0,0 +1,26 @@
+export const getIndicesOf = (
+  searchStr: string,
+  str: string,
+  caseSensitive: boolean = true
+) => {
+  const searchStrLen = searchStr.length
+  if (searchStrLen === 0) {
+    return []
+  }
+
+  let startIndex = 0,
+    index,
+    indices = []
+
+  if (!caseSensitive) {
+    str = str.toLowerCase()
+    searchStr = searchStr.toLowerCase()
+  }
+
+  while ((index = str.indexOf(searchStr, startIndex)) > -1) {
+    indices.push(index)
+    startIndex = index + searchStrLen
+  }
+
+  return indices
+}

src/utils/getLintConfig.spec.ts

@@ -2,8 +2,8 @@ import * as fileModule from '@sasjs/utils/file'
 import { LintConfig } from '../types/LintConfig'
 import { getLintConfig } from './getLintConfig'
 
-const expectedFileLintRulesCount = 5
+const expectedFileLintRulesCount = 6
-const expectedLineLintRulesCount = 5
+const expectedLineLintRulesCount = 6
 const expectedPathLintRulesCount = 2
 
 describe('getLintConfig', () => {

src/utils/getLintConfig.ts

@@ -22,6 +22,7 @@ export const DefaultLintConfiguration = {
   noNestedMacros: true,
   hasMacroParentheses: true,
   strictMacroDefinition: true,
+  noGremlins: true,
   defaultHeader: getDefaultHeader()
 }
 

src/utils/gremlinCharacters.ts

@@ -0,0 +1,314 @@
+// Used https://compart.com/en/unicode to find the to find the description of each gremlin
+// List of gremlins was deduced from https://github.com/redoPop/SublimeGremlins/blob/main/Gremlins.py#L13
+
+export const gremlinCharacters = {
+  '0x0003': {
+    description: 'End of Text'
+  },
+  '0x000b': {
+    description: 'Line Tabulation'
+  },
+  '0x007f': {
+    description: 'Delete'
+  },
+  '0x0080': {
+    description: 'Padding'
+  },
+  '0x0081': {
+    description: 'High Octet Preset'
+  },
+  '0x0082': {
+    description: 'Break Permitted Here'
+  },
+  '0x0083': {
+    description: 'No Break Here'
+  },
+  '0x0084': {
+    description: 'Index'
+  },
+  '0x0085': {
+    description: 'Next Line'
+  },
+  '0x0086': {
+    description: 'Start of Selected Area'
+  },
+  '0x0087': {
+    description: 'End of Selected Area'
+  },
+  '0x0088': {
+    description: 'Character Tabulation Set'
+  },
+  '0x0089': {
+    description: 'Character Tabulation with Justification'
+  },
+  '0x008a': {
+    description: 'Line Tabulation Set'
+  },
+  '0x008b': {
+    description: 'Partial Line Down'
+  },
+  '0x008c': {
+    description: 'Partial Line Backward'
+  },
+  '0x008d': {
+    description: 'Reverse Index'
+  },
+  '0x008e': {
+    description: 'Single Shift Two'
+  },
+  '0x008f': {
+    description: 'Single Shift Three'
+  },
+  '0x0090': {
+    description: 'Device Control String'
+  },
+  '0x0091': {
+    description: 'Private Use One'
+  },
+  '0x0092': {
+    description: 'Private Use Two'
+  },
+  '0x0093': {
+    description: 'Set Transmit State'
+  },
+  '0x0094': {
+    description: 'Cancel Character'
+  },
+  '0x0095': {
+    description: 'Message Waiting'
+  },
+  '0x0096': {
+    description: 'Start of Guarded Area'
+  },
+  '0x0097': {
+    description: 'End of Guarded Area'
+  },
+  '0x0098': {
+    description: 'Start of String'
+  },
+  '0x0099': {
+    description: 'Single Graphic Character Introducer'
+  },
+  '0x009a': {
+    description: 'Single Character Introducer'
+  },
+  '0x009b': {
+    description: 'Control Sequence Introducer'
+  },
+  '0x009c': {
+    description: 'String Terminator'
+  },
+  '0x009d': {
+    description: 'Operating System Command'
+  },
+  '0x009e': {
+    description: 'Privacy Message'
+  },
+  '0x009f': {
+    description: 'Application Program Command'
+  },
+  '0x00a0': {
+    description: 'non breaking space'
+  },
+  '0x00ad': {
+    description: 'Soft Hyphen'
+  },
+  '0x2000': {
+    description: 'En Quad'
+  },
+  '0x2001': {
+    description: 'Em Quad'
+  },
+  '0x2002': {
+    description: 'En Space'
+  },
+  '0x2003': {
+    description: 'Em Space'
+  },
+  '0x2004': {
+    description: 'Three-Per-Em Space'
+  },
+  '0x2005': {
+    description: 'Four-Per-Em Space'
+  },
+  '0x2006': {
+    description: 'Six-Per-Em Space'
+  },
+  '0x2007': {
+    description: 'Figure Space'
+  },
+  '0x2008': {
+    description: 'Punctuation Space'
+  },
+  '0x2009': {
+    description: 'Thin Space'
+  },
+  '0x200a': {
+    description: 'Hair Space'
+  },
+  '0x200b': {
+    description: 'Zero Width Space'
+  },
+  '0x200c': {
+    description: 'Zero Width Non-Joiner'
+  },
+  '0x200d': {
+    description: 'Zero Width Joiner'
+  },
+  '0x200e': {
+    description: 'Left-to-Right Mark'
+  },
+  '0x200f': {
+    description: 'Right-to-Left Mark'
+  },
+  '0x2013': {
+    description: 'En Dash'
+  },
+  '0x2018': {
+    description: 'Left Single Quotation Mark'
+  },
+  '0x2019': {
+    description: 'Right Single Quotation Mark'
+  },
+  '0x201c': {
+    description: 'Left Double Quotation Mark'
+  },
+  '0x201d': {
+    description: 'Right Double Quotation Mark'
+  },
+  '0x2028': {
+    description: 'Line Separator'
+  },
+  '0x2029': {
+    description: 'Paragraph Separator'
+  },
+  '0x202a': {
+    description: 'Left-to-Right Embedding'
+  },
+  '0x202b': {
+    description: 'Right-to-Left Embedding'
+  },
+  '0x202c': {
+    description: 'Pop Directional Formatting'
+  },
+  '0x202d': {
+    description: 'Left-to-Right Override'
+  },
+  '0x202e': {
+    description: 'Right-to-Left Override'
+  },
+  '0x202f': {
+    description: 'Narrow No-Break Space'
+  },
+  '0x205f': {
+    description: 'Medium Mathematical Space'
+  },
+  '0x2060': {
+    description: 'Word Joiner'
+  },
+  '0x2061': {
+    description: 'Function Application'
+  },
+  '0x2062': {
+    description: 'Invisible Times'
+  },
+  '0x2063': {
+    description: 'Invisible Separator'
+  },
+  '0x2064': {
+    description: 'Invisible Plus'
+  },
+  '0x2066': {
+    description: 'Left-to-Right Isolate'
+  },
+  '0x2067': {
+    description: 'Right-to-Left Isolate'
+  },
+  '0x2068': {
+    description: 'First Strong Isolate '
+  },
+  '0x2069': {
+    description: 'Pop Directional Isolate'
+  },
+  '0x206a': {
+    description: 'Inhibit Symmetric Swapping'
+  },
+  '0x206b': {
+    description: 'Activate Symmetric Swapping'
+  },
+  '0x206c': {
+    description: 'Inhibit Arabic Form Shaping'
+  },
+  '0x206d': {
+    description: 'Activate Arabic Form Shaping'
+  },
+  '0x206e': {
+    description: 'National Digit Shapes'
+  },
+  '0x206f': {
+    description: 'Nominal Digit Shapes'
+  },
+  '0x2800': {
+    description: 'Braille Pattern Blank'
+  },
+  '0x3000': {
+    description: 'Ideographic Space'
+  },
+  '0x3164': {
+    description: 'Hangul Filler'
+  },
+  '0xfe00': {
+    description: 'Variation Selector-1'
+  },
+  '0xfe01': {
+    description: 'Variation Selector-2'
+  },
+  '0xfe02': {
+    description: 'Variation Selector-3'
+  },
+  '0xfe03': {
+    description: 'Variation Selector-4'
+  },
+  '0xfe04': {
+    description: 'Variation Selector-5'
+  },
+  '0xfe05': {
+    description: 'Variation Selector-6'
+  },
+  '0xfe06': {
+    description: 'Variation Selector-7'
+  },
+  '0xfe07': {
+    description: 'Variation Selector-8'
+  },
+  '0xfe08': {
+    description: 'Variation Selector-9'
+  },
+  '0xfe09': {
+    description: 'Variation Selector-10'
+  },
+  '0xfe0a': {
+    description: 'Variation Selector-11'
+  },
+  '0xfe0b': {
+    description: 'Variation Selector-12 '
+  },
+  '0xfe0c': {
+    description: 'Variation Selector-13'
+  },
+  '0xfe0d': {
+    description: 'Variation Selector-14'
+  },
+  '0xfe0e': {
+    description: 'Variation Selector-15'
+  },
+  '0xfe0f': {
+    description: 'Variation Selector-16'
+  },
+  '0xfeff': {
+    description: 'Zero Width No-Break Space'
+  },
+  '0xfffc': {
+    description: 'Object Replacement Character'
+  }
+}

src/utils/index.ts

@@ -1,6 +1,8 @@
 export * from './asyncForEach'
 export * from './getLintConfig'
 export * from './getProjectRoot'
+export * from './gremlinCharacters'
 export * from './isIgnored'
 export * from './listSasFiles'
 export * from './splitText'
+export * from './getIndicesOf'

src/utils/splitText.ts

@@ -8,10 +8,19 @@ import { LineEndings } from '../types/LineEndings'
  */
 export const splitText = (text: string, config: LintConfig): string[] => {
   if (!text) return []
+
   const expectedLineEndings =
     config.lineEndings === LineEndings.LF ? '\n' : '\r\n'
+
   const incorrectLineEndings = expectedLineEndings === '\n' ? '\r\n' : '\n'
-  return text
+
-    .replace(new RegExp(incorrectLineEndings, 'g'), expectedLineEndings)
+  text = text.replace(
-    .split(expectedLineEndings)
+    new RegExp(incorrectLineEndings, 'g'),
+    expectedLineEndings
+  )
+
+  // splitting text on '\r\n' was causing some problem
+  // as it was retaining carriage return at the end of each line
+  // so, removed the carriage returns from text and splitted on line feed (lf)
+  return text.replace(/\r/g, '').split(/\n/)
 }