From b43b1eaf9553ba19e7b997ed6c0b3a7a464ba612 Mon Sep 17 00:00:00 2001
From: Akim Demaille <akim@epita.fr>
Date: Fri, 23 Mar 2001 16:54:42 +0000
Subject: [PATCH] * automake.in (IF_PATTERN): Unobfuscate the parens.
 (ENDIF_PATTERN): Allow a condition to be specified. (&file_contents): Use a
 @cond_stack. (&transform): At least for an easy transition, also transform
 %?FOO% and %!FOO%, as suggested by Lars. * scripts.am: First test bed for
 static if/endif use.

---
 ChangeLog         |  9 ++++++++
 automake.in       | 53 ++++++++++++++++++++++++++++++++++++++++++-----
 lib/am/scripts.am | 53 +++++++++++++++++++++++++----------------------
 scripts.am        | 53 +++++++++++++++++++++++++----------------------
 4 files changed, 113 insertions(+), 55 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 3f594dfc..e19200e0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2001-03-23  Akim Demaille  <akim@epita.fr>
+
+	* automake.in (IF_PATTERN): Unobfuscate the parens.
+	(ENDIF_PATTERN): Allow a condition to be specified.
+	(&file_contents): Use a @cond_stack.
+	(&transform): At least for an easy transition, also transform
+	%?FOO% and %!FOO%, as suggested by Lars.
+	* scripts.am: First test bed for static if/endif use.
+
 2001-03-23  Akim Demaille  <akim@epita.fr>
 
 	* automake.in (&file_contents): Use rule_define.
diff --git a/automake.in b/automake.in
index 4980f192..a538b490 100755
--- a/automake.in
+++ b/automake.in
@@ -59,9 +59,9 @@ my $SUFFIX_RULE_PATTERN = "^\\.([a-zA-Z0-9]+)\\.([a-zA-Z0-9]+)\$";
 my $MACRO_PATTERN = "^ *([A-Za-z0-9_\@]+)[ \t]*([:+]?)=[ \t]*(.*)\$";
 my $BOGUS_MACRO_PATTERN = "^ *([^ \t]*)[ \t]*([:+]?)=[ \t]*(.*)\$";
 my $GNITS_VERSION_PATTERN = "[0-9]+\\.[0-9]+([a-z]|\\.[0-9]+)?";
-my $IF_PATTERN = "^if[ \t]+\([A-Za-z][A-Za-z0-9_]*\)[ \t]*\(#.*\)?\$";
-my $ELSE_PATTERN = "^else[ \t]*\(#.*\)?\$";
-my $ENDIF_PATTERN = "^endif[ \t]*\(#.*\)?\$";
+my $IF_PATTERN = "^if[ \t]+([A-Za-z][A-Za-z0-9_]*)[ \t]*(#.*)?\$";
+my $ELSE_PATTERN = "^else[ \t]*(#.*)?\$";
+my $ENDIF_PATTERN = "^endif(?:[ \t]+([A-Za-z][A-Za-z0-9_]*))?[ \t]*(#.*)?\$";
 my $PATH_PATTERN='(\\w|[/.-])+';
 # This will pass through anything not of the prescribed form.
 my $INCLUDE_PATTERN = "^include[ \t]+((\\\$\\\(top_srcdir\\\)/${PATH_PATTERN})|(\\\$\\\(srcdir\\\)/${PATH_PATTERN})|([^/\\\$]${PATH_PATTERN}))[ \t]*(#.*)?\$";
@@ -6739,6 +6739,7 @@ sub file_contents ($%)
     my $result_rules = '';
     my $comment = '';
     my $separator = '';
+    my @cond_stack = ();
     foreach (split (/(?<!\\)\n(?![\t#])/, $contents))
     {
         # Strip leading new lines.  This can happen for comments:
@@ -6763,7 +6764,46 @@ sub file_contents ($%)
  	{
  	    # Stick comments before the incoming macro or rule.
  	    $comment = "$_\n";
- 	}
+
+	}
+
+        # Handling the conditionals.
+        elsif (/$IF_PATTERN/o)
+	{
+	    my $cond = $1;
+	    &am_line_error ($., "$cond does not appear in AM_CONDITIONAL")
+		if ! $configure_cond{$cond} && $cond !~ /^TRUE|FALSE$/;
+	    push (@cond_stack,
+		  ($cond =~ /^TRUE|FALSE$/) ? "$cond" : "${cond}_TRUE");
+	}
+	elsif (/$ELSE_PATTERN/o)
+	{
+	    if (! @cond_stack)
+	    {
+		&am_line_error ($., "else without if");
+	    }
+	    elsif ($cond_stack[$#cond_stack] =~ /^(.*_)?FALSE$/)
+	    {
+		&am_line_error ($., "else after else");
+	    }
+	    else
+	    {
+		$cond_stack[$#cond_stack] =~ s/TRUE$/FALSE/;
+	    }
+	}
+	elsif (/$ENDIF_PATTERN/o)
+	{
+	    if (! @cond_stack)
+	    {
+		&am_line_error ($., "endif without if");
+	    }
+	    else
+	    {
+		pop @cond_stack;
+	    }
+	}
+
+        # Handling rules.
  	elsif (/$RULE_PATTERN/mso)
  	{
 	  # Separate relationship from optional actions: the first
@@ -6799,7 +6839,8 @@ sub file_contents ($%)
 		  if (!defined $targets{$targets})
 		    {
 		      $result_rules .= "$separator$comment$paragraph\n";
-		      rule_define ($targets, 1, '', $.);
+		      rule_define ($targets, 1,
+				   conditional_string (@cond_stack), $.);
 		    }
 		  $comment = $separator = '';
 		  last;
@@ -6854,10 +6895,12 @@ sub transform (%)
 	if ($val)
 	{
 	    $result .= "s/\Q?$token?\E//gm;s/^.*\Q?!$token?\E.*\\n//gm;";
+	    $result .= "s/\Q%?$token%\E/TRUE/gm;s/^.*\Q%!$token%\E.*\\n/FALSE/gm;";
 	}
 	else
 	{
 	    $result .= "s/\Q?!$token?\E//gm;s/^.*\Q?$token?\E.*\\n//gm;";
+	    $result .= "s/\Q%?$token%\E/FALSE/gm;s/^.*\Q%!$token%\E.*\\n/TRUE/gm;";
 	}
     }
 
diff --git a/lib/am/scripts.am b/lib/am/scripts.am
index f7234e49..1df3b9d7 100644
--- a/lib/am/scripts.am
+++ b/lib/am/scripts.am
@@ -21,38 +21,41 @@
 ## Installing.  ##
 ## ------------ ##
 
-?INSTALL?_am_installdirs += $(DESTDIR)$(%NDIR%dir)
-?INSTALL??EXEC?.PHONY install-exec-am: install-%DIR%SCRIPTS
-?INSTALL??!EXEC?.PHONY install-data-am: install-%DIR%SCRIPTS
-?INSTALL?install-%DIR%SCRIPTS: $(%DIR%_SCRIPTS)
-?INSTALL?	@$(NORMAL_INSTALL)
-?INSTALL?	$(mkinstalldirs) $(DESTDIR)$(%NDIR%dir)
+if %?INSTALL%
+_am_installdirs += $(DESTDIR)$(%NDIR%dir)
+?EXEC?.PHONY install-exec-am: install-%DIR%SCRIPTS
+?!EXEC?.PHONY install-data-am: install-%DIR%SCRIPTS
+install-%DIR%SCRIPTS: $(%DIR%_SCRIPTS)
+	@$(NORMAL_INSTALL)
+	$(mkinstalldirs) $(DESTDIR)$(%NDIR%dir)
 ## Funny invocation because Makefile variable can be empty, leading to
 ## a syntax error in sh.
-?INSTALL?	@list='$(%DIR%_SCRIPTS)'; for p in $$list; do \
-?INSTALL?	  f="`echo $$p|sed '$(transform)'`"; \
-?INSTALL?	  if test -f $$p; then \
-?INSTALL?	    echo " $(INSTALL_SCRIPT) $$p $(DESTDIR)$(%NDIR%dir)/$$f"; \
-?INSTALL?	    $(INSTALL_SCRIPT) $$p $(DESTDIR)$(%NDIR%dir)/$$f; \
-?INSTALL?	  elif test -f $(srcdir)/$$p; then \
-?INSTALL?	    echo " $(INSTALL_SCRIPT) $(srcdir)/$$p $(DESTDIR)$(%NDIR%dir)/$$f"; \
-?INSTALL?	    $(INSTALL_SCRIPT) $(srcdir)/$$p $(DESTDIR)$(%NDIR%dir)/$$f; \
-?INSTALL?	  else :; fi; \
-?INSTALL?	done
-
+	@list='$(%DIR%_SCRIPTS)'; for p in $$list; do \
+	  f="`echo $$p|sed '$(transform)'`"; \
+	  if test -f $$p; then \
+	    echo " $(INSTALL_SCRIPT) $$p $(DESTDIR)$(%NDIR%dir)/$$f"; \
+	    $(INSTALL_SCRIPT) $$p $(DESTDIR)$(%NDIR%dir)/$$f; \
+	  elif test -f $(srcdir)/$$p; then \
+	    echo " $(INSTALL_SCRIPT) $(srcdir)/$$p $(DESTDIR)$(%NDIR%dir)/$$f"; \
+	    $(INSTALL_SCRIPT) $(srcdir)/$$p $(DESTDIR)$(%NDIR%dir)/$$f; \
+	  else :; fi; \
+	done
+endif %?INSTALL%
 
 ## -------------- ##
 ## Uninstalling.  ##
 ## -------------- ##
 
-?INSTALL?.PHONY uninstall-am: uninstall-%DIR%SCRIPTS
-?INSTALL?uninstall-%DIR%SCRIPTS:
-?INSTALL?	@$(NORMAL_UNINSTALL)
-?INSTALL?	@list='$(%DIR%_SCRIPTS)'; for p in $$list; do \
-?INSTALL?	  f="`echo $$p|sed '$(transform)'`"; \
-?INSTALL?	  echo " rm -f $(DESTDIR)$(%NDIR%dir)/$$f"; \
-?INSTALL?	  rm -f $(DESTDIR)$(%NDIR%dir)/$$f; \
-?INSTALL?	done
+if %?INSTALL%
+.PHONY uninstall-am: uninstall-%DIR%SCRIPTS
+uninstall-%DIR%SCRIPTS:
+	@$(NORMAL_UNINSTALL)
+	@list='$(%DIR%_SCRIPTS)'; for p in $$list; do \
+	  f="`echo $$p|sed '$(transform)'`"; \
+	  echo " rm -f $(DESTDIR)$(%NDIR%dir)/$$f"; \
+	  rm -f $(DESTDIR)$(%NDIR%dir)/$$f; \
+	done
+endif %?INSTALL%
 
 
 ## ---------- ##
diff --git a/scripts.am b/scripts.am
index f7234e49..1df3b9d7 100644
--- a/scripts.am
+++ b/scripts.am
@@ -21,38 +21,41 @@
 ## Installing.  ##
 ## ------------ ##
 
-?INSTALL?_am_installdirs += $(DESTDIR)$(%NDIR%dir)
-?INSTALL??EXEC?.PHONY install-exec-am: install-%DIR%SCRIPTS
-?INSTALL??!EXEC?.PHONY install-data-am: install-%DIR%SCRIPTS
-?INSTALL?install-%DIR%SCRIPTS: $(%DIR%_SCRIPTS)
-?INSTALL?	@$(NORMAL_INSTALL)
-?INSTALL?	$(mkinstalldirs) $(DESTDIR)$(%NDIR%dir)
+if %?INSTALL%
+_am_installdirs += $(DESTDIR)$(%NDIR%dir)
+?EXEC?.PHONY install-exec-am: install-%DIR%SCRIPTS
+?!EXEC?.PHONY install-data-am: install-%DIR%SCRIPTS
+install-%DIR%SCRIPTS: $(%DIR%_SCRIPTS)
+	@$(NORMAL_INSTALL)
+	$(mkinstalldirs) $(DESTDIR)$(%NDIR%dir)
 ## Funny invocation because Makefile variable can be empty, leading to
 ## a syntax error in sh.
-?INSTALL?	@list='$(%DIR%_SCRIPTS)'; for p in $$list; do \
-?INSTALL?	  f="`echo $$p|sed '$(transform)'`"; \
-?INSTALL?	  if test -f $$p; then \
-?INSTALL?	    echo " $(INSTALL_SCRIPT) $$p $(DESTDIR)$(%NDIR%dir)/$$f"; \
-?INSTALL?	    $(INSTALL_SCRIPT) $$p $(DESTDIR)$(%NDIR%dir)/$$f; \
-?INSTALL?	  elif test -f $(srcdir)/$$p; then \
-?INSTALL?	    echo " $(INSTALL_SCRIPT) $(srcdir)/$$p $(DESTDIR)$(%NDIR%dir)/$$f"; \
-?INSTALL?	    $(INSTALL_SCRIPT) $(srcdir)/$$p $(DESTDIR)$(%NDIR%dir)/$$f; \
-?INSTALL?	  else :; fi; \
-?INSTALL?	done
-
+	@list='$(%DIR%_SCRIPTS)'; for p in $$list; do \
+	  f="`echo $$p|sed '$(transform)'`"; \
+	  if test -f $$p; then \
+	    echo " $(INSTALL_SCRIPT) $$p $(DESTDIR)$(%NDIR%dir)/$$f"; \
+	    $(INSTALL_SCRIPT) $$p $(DESTDIR)$(%NDIR%dir)/$$f; \
+	  elif test -f $(srcdir)/$$p; then \
+	    echo " $(INSTALL_SCRIPT) $(srcdir)/$$p $(DESTDIR)$(%NDIR%dir)/$$f"; \
+	    $(INSTALL_SCRIPT) $(srcdir)/$$p $(DESTDIR)$(%NDIR%dir)/$$f; \
+	  else :; fi; \
+	done
+endif %?INSTALL%
 
 ## -------------- ##
 ## Uninstalling.  ##
 ## -------------- ##
 
-?INSTALL?.PHONY uninstall-am: uninstall-%DIR%SCRIPTS
-?INSTALL?uninstall-%DIR%SCRIPTS:
-?INSTALL?	@$(NORMAL_UNINSTALL)
-?INSTALL?	@list='$(%DIR%_SCRIPTS)'; for p in $$list; do \
-?INSTALL?	  f="`echo $$p|sed '$(transform)'`"; \
-?INSTALL?	  echo " rm -f $(DESTDIR)$(%NDIR%dir)/$$f"; \
-?INSTALL?	  rm -f $(DESTDIR)$(%NDIR%dir)/$$f; \
-?INSTALL?	done
+if %?INSTALL%
+.PHONY uninstall-am: uninstall-%DIR%SCRIPTS
+uninstall-%DIR%SCRIPTS:
+	@$(NORMAL_UNINSTALL)
+	@list='$(%DIR%_SCRIPTS)'; for p in $$list; do \
+	  f="`echo $$p|sed '$(transform)'`"; \
+	  echo " rm -f $(DESTDIR)$(%NDIR%dir)/$$f"; \
+	  rm -f $(DESTDIR)$(%NDIR%dir)/$$f; \
+	done
+endif %?INSTALL%
 
 
 ## ---------- ##
-- 
2.43.5