Merge branch 'LazBuild/ExpandMacros' into 'main'

LazBuild: Checking macro substitution in the "--get-expand-text" option and setting the return code

See merge request freepascal.org/lazarus/lazarus!338

ide/buildmanager.pas

@@ -365,7 +365,7 @@ begin
     {$ENDIF}
     s:='';
     //IDEMessageDialog('Unknown Macro','Macro not defined: "'+s+'".',mtError,[mbAbort],0);
-    Handled:=true;
+    Handled:=false;
     exit;
   end;
 end;

ide/lazarusidestrconsts.pas

@@ -176,8 +176,10 @@ resourcestring
     'multiple times. If compilation options are also specified in --build-ide, '+
     'then the options from --opt will be added after them.';
   lisGetExpandText = 'Print the result of substituting macros in the text. '+
-    'The absence of macros in the text means the name of the macro. '+
+    'The absence of macros means the name of the macro. '+
-    'By default, active build mode is used.';
+    'In case of an error, returns only the text with partially expanded macros '+
+    'and sets the error code (also for an empty string). '+
+    'Takes into account the active build mode (or specified via "--bm").';
   lisGetBuildModes = 'Print a list of build modes in the project. Active mode is listed first.';
 
   lisLazbuildOptionsSyntax = 'lazbuild [options] <project/package filename or package name>';

ide/lazbuild.lpr

@@ -206,6 +206,7 @@ const
   ErrorLoadProjectFailed  = 5;
   ErrorInvalidSyntax      = 6;
   ErrorInitialization     = 7;
+  ErrorExpandMacro        = 8;
   VersionStr = {$I packages/ideconfig/version.inc};
 
 procedure FilterConfigFileContent;
@@ -848,6 +849,13 @@ var
 
     if HasLongOptIgnoreCase('get',S) or
        HasLongOptIgnoreCase('get-expand-text',S) then begin
+      // check for empty text
+      if S = '' then
+      begin
+        writeln('');            // print empty text as well
+        halt(ErrorExpandMacro); // exit with error
+      end;
+
       // check for macros
       HasMacro := false;
       for i := 1 to length(S) - 1 do // skip last char
@@ -859,7 +867,13 @@ var
       if not HasMacro then
         S := '$(' + S + ')';
       // expand
-      Project1.MacroEngine.SubstituteStr(S);
+      Project1.MacroEngine.MarkUnhandledMacros := false;
+      if not Project1.MacroEngine.SubstituteStr(S) then
+      begin
+        writeln(S);             // print partially expanded text
+        halt(ErrorExpandMacro); // exit with error
+      end;
+      // print result
       WriteLn(S);
       exit(true);
     end;

ide/packages/ideconfig/transfermacros.pp

@@ -295,7 +295,10 @@ begin
       //debugln(['TTransferMacroList.SubstituteStr FUNC ',MacroName]);
       MacroEnd:=SearchBracketClose(MacroEnd)+1;
       if MacroEnd>sLen+1 then
+      begin
+        result := false;
         break; // missing closing bracket
+      end;
       OldMacroLen:=MacroEnd-MacroStart;
       MacroStr:=copy(s,MacroStart,OldMacroLen);
       // Macro found
@@ -322,6 +325,8 @@ begin
       ExecuteMacro(MacroName,MacroParam,Data,Handled,Abort,Depth+1);
       if Abort then
         exit(false);
+      if not Handled then
+        result := false; // set error, but continue parsing
       MacroStr:=MacroParam;
 
       // substitute result