Re: [PATCH/RFC] Makefile: Fix compilation of windows resource file

[Junio C Hamano <gitster@pobox.com>]

Junio C Hamano <gitster@pobox.com> writes:

> Ramsay Jones <ramsay@ramsay1.demon.co.uk> writes:
>
>> If the git version number consists of less than three period
>> separated numbers, then the windows resource file compilation
>> issues a syntax error:
>>
>>   $ touch git.rc
>>   $ make V=1 git.res
>>   GIT_VERSION = 1.9.rc0
>>   windres -O coff \
>>             -DMAJOR=1 -DMINOR=9 -DPATCH=rc0 \
>>             -DGIT_VERSION="\\\"1.9.rc0\\\"" git.rc -o git.res
>>   C:\msysgit\msysgit\mingw\bin\windres.exe: git.rc:2: syntax error
>>   make: *** [git.res] Error 1
>>   $
>>
>> [Note that -DPATCH=rc0]
>
> Thanks for a report.  I've been wondering how many distros and
> packagers would have an issue like this when we go to 2-digit
> release naming.  Of course we knew everybody can grok 3-or-4 ;-)
>
>> In order to fix the syntax error, we replace any rcX with zero and
>> include some additional 'zero' padding to the version number list.
>>
>> Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
>> ---
>>
>> Hi Junio,
>>
>> This patch is marked RFC because, as I was just about to send this
>> email, I realized it wouldn't always work:
>
> Yeah, and I suspect that with the use of $(wordlist 1,3,...) it is
> not even working for maintenance releases.  Does it differenciate
> between 1.8.5.1 and 1.8.5.2, for example?.  Or does "windres" always
> assume that a package version is always 3-dewey-decimal (not 2, not
> 4)?

Perhaps like this?  Just grab digit-only segments that are separated
with either dot or dash (and stop when we see a non-digit like
'dirty' or 'rcX'), and make them separated with comma.

Note that I am merely guessing that "short-digit" version numbers
are acceptable by now after seeing

    https://sourceware.org/ml/binutils/2012-07/msg00199.html

without knowing the current state of affairs.  If that is not the
case you may have to count the iteration of the loop and append or
chop the resulting string as necessary.

 Makefile              |  2 +-
 gen-version-string.sh | 13 +++++++++++++
 git.rc                |  4 ++--
 3 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index b4af1e2..329f942 100644
--- a/Makefile
+++ b/Makefile
@@ -1773,7 +1773,7 @@ $(SCRIPT_LIB) : % : %.sh GIT-SCRIPT-DEFINES
 
 git.res: git.rc GIT-VERSION-FILE
 	$(QUIET_RC)$(RC) \
-	  $(join -DMAJOR= -DMINOR= -DPATCH=, $(wordlist 1,3,$(subst -, ,$(subst ., ,$(GIT_VERSION))))) \
+		-DVERSIONSTRING=$$(./gen-version-string.sh $(GIT_VERSION)) \
 	  -DGIT_VERSION="\\\"$(GIT_VERSION)\\\"" $< -o $@
 
 ifndef NO_PERL
diff --git a/gen-version-string.sh b/gen-version-string.sh
new file mode 100755
index 0000000..00af718
--- /dev/null
+++ b/gen-version-string.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+IFS=.- result=
+for v in $1
+do
+	if expr "$v" : '[0-9][0-9]*$' >/dev/null
+	then
+		result=$result${result:+,}$v
+	else
+		break
+	fi
+done
+echo "$result"
diff --git a/git.rc b/git.rc
index bce6db9..6f2a8d2 100644
--- a/git.rc
+++ b/git.rc
@@ -1,6 +1,6 @@
 1 VERSIONINFO
-FILEVERSION     MAJOR,MINOR,PATCH,0
-PRODUCTVERSION  MAJOR,MINOR,PATCH,0
+FILEVERSION     VERSIONSTRING,0
+PRODUCTVERSION  VERSIONSTRING,0
 BEGIN
   BLOCK "StringFileInfo"
   BEGIN