Re: [PATCH 4/4] Move initialization of Git::SVN variables into Git::SVN.

[Eric Wong <normalperson@yhbt.net>]

Junio C Hamano <gitster@pobox.com> wrote:
> What was happening was that originally, pu had ms/makefile-pl but
> not ms/git-svn-pm.  Hence, perl/Git/SVN.pm did not exist.  I ran
> "make" and it created perl/perl.mak that does not know about
> Git/SVN.pm;
> 
> Then ms/git-svn-pm is merged to pu and now we have perl/Git/SVN.pm.
> But there is nothing in ms/makefile-pl that says on what files
> perl.mak depends on.
> 
> I think there needs to be a dependency in to recreate perl/perl.mak
> when any of the *.pm files are changed, perhaps like this.
> 
> I am not sure why perl/perl.mak is built by the top-level Makefile,
> instead of just using "$(MAKE) -C perl/", though...

I'm not sure why perl/perl.mak is built by the top-level Makefile,
either.

I'll put the following after ms/makefile-pl but before ms/git-svn-pm:

>From a6ea2301d1bb6fd7c7415fed3aa7673542a563bd Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Fri, 27 Jul 2012 20:04:20 +0000
Subject: [PATCH] perl: detect new files in MakeMaker builds

While Makefile.PL now finds .pm files on its own, it does not
detect new files after it generates perl/perl.mak.

[ew: commit message]

ref: http://mid.gmane.org/7vlii51xz4.fsf@alter.siamese.dyndns.org

Signed-off-by: Eric Wong <normalperson@yhbt.net>
---
 Makefile      | 7 +++++++
 perl/Makefile | 1 +
 2 files changed, 8 insertions(+)

diff --git a/Makefile b/Makefile
index b0b3493..e2a4ac7 100644
--- a/Makefile
+++ b/Makefile
@@ -2090,6 +2090,13 @@ $(SCRIPT_LIB) : % : %.sh GIT-SCRIPT-DEFINES
 ifndef NO_PERL
 $(patsubst %.perl,%,$(SCRIPT_PERL)): perl/perl.mak
 
+perl/perl.mak: perl/PM.stamp
+
+perl/PM.stamp: FORCE
+	$(QUIET_GEN)find perl -type f -name '*.pm' | sort >$@+ && \
+	{ cmp $@+ $@ >/dev/null 2>/dev/null || mv $@+ $@; } && \
+	$(RM) $@+
+
 perl/perl.mak: GIT-CFLAGS GIT-PREFIX perl/Makefile perl/Makefile.PL
 	$(QUIET_SUBDIR0)perl $(QUIET_SUBDIR1) PERL_PATH='$(PERL_PATH_SQ)' prefix='$(prefix_SQ)' $(@F)
 
diff --git a/perl/Makefile b/perl/Makefile
index 8493d76..4969ef8 100644
--- a/perl/Makefile
+++ b/perl/Makefile
@@ -20,6 +20,7 @@ clean:
 	$(RM) ppport.h
 	$(RM) $(makfile)
 	$(RM) $(makfile).old
+	$(RM) PM.stamp
 
 ifdef NO_PERL_MAKEMAKER
 instdir_SQ = $(subst ','\'',$(prefix)/lib)
-- 
Eric Wong