[gimp] app: move git-version.h generation to the repository root.

[Jehan Pagès <jehanp src gnome org>]

commit 44f23bdf0c53c997234cbeae9ea61107ab885e05
Author: Jehan <jehan girinstud io>
Date:   Mon Jan 29 20:08:13 2018 +0100

    app: move git-version.h generation to the repository root.
    
    The reason is that this file is now included for a binary in tools/ as
    well (the debug binary) and tools/ contents needs to be built before
    app/. Even using BUILT_SOURCES in the Makefile under app/ is not enough.
    Anyway it makes sense that this file should be under the root of the
    repository since that describes the status of the source repository. So
    let's move it up one folder.

 Makefile.am     |   41 +++++++++++++++++++++++++++++++++++++++++
 app/Makefile.am |   45 +--------------------------------------------
 2 files changed, 42 insertions(+), 44 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 66043a2..6e59ddd 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -124,3 +124,44 @@ $(srcdir)/ChangeLog:
          echo A git checkout and git-log is required to generate this file >> $@); \
        fi
 .PHONY: $(srcdir)/ChangeLog
+
+libapp_generated_sources = \
+       git-version.h
+
+# Build git-version.h before anything in the subdirs as this is needed
+# in the about and debug dialog (app/) and in the debug tool (tools/).
+BUILT_SOURCES = $(libapp_generated_sources)
+
+CLEANFILES = $(libapp_generated_sources)
+
+# If git is available, always check if git-version.h should be
+# updated. If git is not available, don't do anything if git-version.h
+# already exists because then we are probably working with a tarball
+# in which case the git-version.h we ship is correct.
+git-version.h: update-git-version-header
+       @if test -e "$(top_srcdir)/.git"; then \
+         git_version="`git --git-dir=$(top_srcdir)/.git describe --always`"; \
+         git_version_abbrev="`git --git-dir=$(top_srcdir)/.git rev-parse --short HEAD`"; \
+         git_last_commit_year="`git --git-dir=$(top_srcdir)/.git log -n1 --reverse --pretty=%ci | cut -b 
1-4`"; \
+       elif test ! -f "$@"; then \
+         git_version="Unknown, shouldn't happen"; \
+         git_version_abbrev="$$git_version"; \
+         git_last_commit_timestamp=-1; \
+         git_last_commit_year="`date -u '+%Y'`"; \
+       fi; \
+       if test -n "$$git_version"; then \
+         echo "#ifndef __GIT_VERSION_H__" > "$@.tmp"; \
+         echo "#define __GIT_VERSION_H__" >> "$@.tmp"; \
+         echo "#define GIMP_GIT_VERSION \"$$git_version\"" >> "$@.tmp"; \
+         echo "#define GIMP_GIT_VERSION_ABBREV \"$$git_version_abbrev\"" >> "$@.tmp"; \
+         echo "#define GIMP_GIT_LAST_COMMIT_YEAR \"$$git_last_commit_year\"" >> "$@.tmp"; \
+         echo "#endif /* __GIT_VERSION_H__ */" >> "$@.tmp"; \
+       fi
+       @if ( test -f "$@.tmp" && test -f "$@" && cmp "$@.tmp" "$@" > /dev/null ); then \
+         rm -f "$@.tmp"; \
+       elif test -f "$@.tmp"; then \
+         mv "$@.tmp" "$@"; \
+         echo "  git HEAD changed: $@ regenerated"; \
+       fi
+
+.PHONY: update-git-version-header
diff --git a/app/Makefile.am b/app/Makefile.am
index 803b53c..bad2c5d 100644
--- a/app/Makefile.am
+++ b/app/Makefile.am
@@ -69,18 +69,7 @@ libapp_sources = \
        gimp-version.c          \
        gimp-version.h
 
-libapp_generated_sources = \
-       git-version.h
-
-# Build git-version.h before anything in the subdirs as this is needed
-# in the about dialog.
-BUILT_SOURCES = $(libapp_generated_sources)
-
-CLEANFILES = $(libapp_generated_sources)
-
-$(srcdir)/version.c: git-version.h
-
-libapp_a_SOURCES = $(libapp_sources) $(libapp_generated_sources)
+libapp_a_SOURCES = $(libapp_sources)
 
 gimp_@GIMP_APP_VERSION@_SOURCES = $(libapp_sources) main.c
 
@@ -268,35 +257,3 @@ dist-dump-gimprc: gimp-console-$(GIMP_APP_VERSION)$(EXEEXT)
                && rm gimprc.tmp gimprc.tmp2
 
 dist-hook: dist-check-gimp-console dist-dump-gimprc
-
-# If git is available, always check if git-version.h should be
-# updated. If git is not available, don't do anything if git-version.h
-# already exists because then we are probably working with a tarball
-# in which case the git-version.h we ship is correct.
-git-version.h: update-git-version-header
-       @if test -e "$(top_srcdir)/.git"; then \
-         git_version="`git --git-dir=$(top_srcdir)/.git describe --always`"; \
-         git_version_abbrev="`git --git-dir=$(top_srcdir)/.git rev-parse --short HEAD`"; \
-         git_last_commit_year="`git --git-dir=$(top_srcdir)/.git log -n1 --reverse --pretty=%ci | cut -b 
1-4`"; \
-       elif test ! -f "$@"; then \
-         git_version="Unknown, shouldn't happen"; \
-         git_version_abbrev="$$git_version"; \
-         git_last_commit_timestamp=-1; \
-         git_last_commit_year="`date -u '+%Y'`"; \
-       fi; \
-       if test -n "$$git_version"; then \
-         echo "#ifndef __GIT_VERSION_H__" > "$@.tmp"; \
-         echo "#define __GIT_VERSION_H__" >> "$@.tmp"; \
-         echo "#define GIMP_GIT_VERSION \"$$git_version\"" >> "$@.tmp"; \
-         echo "#define GIMP_GIT_VERSION_ABBREV \"$$git_version_abbrev\"" >> "$@.tmp"; \
-         echo "#define GIMP_GIT_LAST_COMMIT_YEAR \"$$git_last_commit_year\"" >> "$@.tmp"; \
-         echo "#endif /* __GIT_VERSION_H__ */" >> "$@.tmp"; \
-       fi
-       @if ( test -f "$@.tmp" && test -f "$@" && cmp "$@.tmp" "$@" > /dev/null ); then \
-         rm -f "$@.tmp"; \
-       elif test -f "$@.tmp"; then \
-         mv "$@.tmp" "$@"; \
-         echo "  git HEAD changed: $@ regenerated"; \
-       fi
-
-.PHONY: update-git-version-header