feat: updating mp_lib2cards to enable a single file to be created with all the tables for a particular library

base/mp_ds2cards.sas

@@ -3,25 +3,27 @@
   @brief Create a CARDS file from a SAS dataset.
   @details Uses dataset attributes to convert all data into datalines.
     Running the generated file will rebuild the original dataset.
-  usage:
+  Usage:
 
       %mp_ds2cards(base_ds=sashelp.class
         , cards_file= "C:\temp\class.sas"
         , maxobs=5)
 
-    stuff to add
+  TODO:
      - labelling the dataset
      - explicity setting a unix LF
      - constraints / indexes etc
 
-  @param base_ds= Should be two level - eg work.blah.  This is the table that
+  @param [in] base_ds= Should be two level - eg work.blah.  This is the table that
                    is converted to a cards file.
-  @param tgt_ds= Table that the generated cards file would create. Optional -
+  @param [in] tgt_ds= Table that the generated cards file would create. Optional -
                   if omitted, will be same as BASE_DS.
-  @param cards_file= Location in which to write the (.sas) cards file
-  @param maxobs= to limit output to the first <code>maxobs</code> observations
-  @param showlog= whether to show generated cards file in the SAS log (YES/NO)
-  @param outencoding= provide encoding value for file statement (eg utf-8)
+  @param [out] cards_file= Location in which to write the (.sas) cards file
+  @param [in] maxobs= to limit output to the first <code>maxobs</code> observations
+  @param [in] showlog= whether to show generated cards file in the SAS log (YES/NO)
+  @param [in] outencoding= provide encoding value for file statement (eg utf-8)
+  @param [in] append= If NO then will rebuild the cards file if it already exists,
+  otherwise will append to it.  Used by the mp_lib2cards.sas macro.
 
 
   @version 9.2
@@ -34,6 +36,7 @@
     ,random_sample=NO
     ,showlog=YES
     ,outencoding=
+    ,append=NO
 )/*/STORE SOURCE*/;
 %local i setds nvars;
 
@@ -46,6 +49,8 @@
 %if (&tgt_ds = ) %then %let tgt_ds=&base_ds;
 %if %index(&tgt_ds,.)=0 %then %let tgt_ds=WORK.%scan(&base_ds,2,.);
 %if ("&outencoding" ne "") %then %let outencoding=encoding="&outencoding";
+%if ("&append" = "") %then %let append=;
+%else %let append=mod;
 
 /* get varcount */
 %let nvars=0;
@@ -172,7 +177,7 @@ data _null_;
 run;
 
 data _null_;
-  file &cards_file. &outencoding lrecl=32767 termstr=nl;
+  file &cards_file. &outencoding lrecl=32767 termstr=nl &append;
   length __attrib $32767;
   if _n_=1 then do;
     put '/*******************************************************************';

base/mp_lib2cards.sas

@@ -1,21 +1,26 @@
 /**
   @file
   @brief Convert all library members to CARDS files
-  @details Gets list of members then calls the <code>%mp_ds2cards()</code>
-            macro
-    usage:
+  @details Gets list of members then calls the <code>%mp_ds2cards()</code> macro.
+  Usage:
 
-    %mp_lib2cards(lib=sashelp
-        , outloc= C:\temp )
+      %mp_lib2cards(lib=sashelp
+          , outloc= C:\temp )
+
+  The output will be one cards file in the `outloc` directory per dataset in the
+  input `lib` library.  If the `outloc` directory does not exist, it is created.
 
   <h4> SAS Macros </h4>
   @li mf_mkdir.sas
+  @li mf_trimstr.sas
   @li mp_ds2cards.sas
 
-  @param lib= Library in which to convert all datasets
-  @param outloc= Location in which to store output.  Defaults to WORK library.
-    Do not use a trailing slash (my/path not my/path/).  No quotes.
-  @param maxobs= limit output to the first <code>maxobs</code> observations
+  @param [in] lib= Library in which to convert all datasets
+  @param [out] outloc= Location in which to store output.  Defaults to WORK
+    library. No quotes.
+  @param [out] outfile= Optional output file NAME - if provided, then will create
+  a single output file instead of one file per input table.
+  @param [in] maxobs= limit output to the first <code>maxobs</code> observations
 
   @version 9.2
   @author Allan Bowe
@@ -25,6 +30,7 @@
     ,outloc=%sysfunc(pathname(work)) /* without trailing slash */
     ,maxobs=max
     ,random_sample=NO
+    ,outfile=0
 )/*/STORE SOURCE*/;
 
 /* Find the tables */
@@ -36,16 +42,28 @@ select distinct lowcase(memname)
   from dictionary.tables
   where upcase(libname)="%upcase(&lib)";
 
+/* trim trailing slash, if provided */
+%let outloc=%mf_trimstr(&outloc,/);
+%let outloc=%mf_trimstr(&outloc,\);
+
 /* create the output directory */
 %mf_mkdir(&outloc)
 
 /* create the cards files */
 %do x=1 %to %sysfunc(countw(&memlist));
-   %let ds=%scan(&memlist,&x);
-   %mp_ds2cards(base_ds=&lib..&ds
-      ,cards_file="&outloc/&ds..sas"
-      ,maxobs=&maxobs
-      ,random_sample=&random_sample)
+  %let ds=%scan(&memlist,&x);
+  %mp_ds2cards(base_ds=&lib..&ds
+    ,maxobs=&maxobs
+    ,random_sample=&random_sample
+  %if "&outfile" ne "0" %then %do;
+    ,append=YES
+    ,cards_file="&outloc/&outfile"
+  %end;
+  %else %do;
+    ,append=NO
+    ,cards_file="&outloc/&ds..sas"
+  %end;
+  )
 %end;
 
 %mend;