X-Git-Url: https://code.delx.au/pulseaudio/blobdiff_plain/638f9a561e8353ae9bd7e07e4f42e4c4f53f617e..65be25dd0faa566a74101d5a0f50d5a825b6f1e7:/git-version-gen

diff --git a/git-version-gen b/git-version-gen
index ae3988ea..724da666 100755
--- a/git-version-gen
+++ b/git-version-gen
@@ -1,6 +1,6 @@
 #!/bin/sh
 # Print a version string.
-scriptversion=2008-04-08.07
+scriptversion=2012-09-25.20
 
 # Copyright (C) 2007-2008 Free Software Foundation
 #
@@ -67,6 +67,7 @@ scriptversion=2008-04-08.07
 #	echo $(VERSION) > $@-t && mv $@-t $@
 # dist-hook:
 #	echo $(VERSION) > $(distdir)/.tarball-version
+#	echo $(VERSION) > $(distdir)/.version
 
 case $# in
     1) ;;
@@ -76,6 +77,7 @@ esac
 tarball_version_file=$1
 nl='
 '
+v=
 
 # First see if there is a tarball-only version file.
 # then try "git describe", then default.
@@ -91,17 +93,33 @@ then
 	&& echo "$0: WARNING: $tarball_version_file seems to be damaged" 1>&2
 fi
 
+# This is presently used by the GNOME-OSTree build system; it
+# helps support the case where the meta-build system has already
+# determined the git revision, but we may not be able to run "git describe"
+# because we're inside a chroot.
+if test -n "$GIT_DESCRIBE_FOR_BUILD";
+then
+    v=$GIT_DESCRIBE_FOR_BUILD
+fi
+
 if test -n "$v"
 then
     : # use $v
-elif test -d .git \
-    && v=`git describe --abbrev=4 --match='v*' HEAD 2>/dev/null \
-	  || git describe --abbrev=4 HEAD 2>/dev/null` \
-    && case $v in
-	 v[0-9]*) ;;
-	 *) (exit 1) ;;
-       esac
+elif test -e .git \
+    && v=`git describe --abbrev=4 --match='v[0-9]*' HEAD 2>/dev/null` \
+    && [ -n "$v" ]
 then
+    # If we are on a "dev" tag, we need to check that it is not the same
+    # reference as the a previous version tag (this only happens when we are
+    # working with a release tag).
+    # NB The below trick relies on the $v being an exact tag to work which
+    # will only work when HEAD == tag. When further commits have been made on top
+    # of the tag, the $v will be supplimented with the number of commits since
+    # that tag and the commit ref of the most recent commit and thus will
+    # fail the test below (as intended)
+    v2=`git describe --abbrev=4 --match='v[0-9]\.[0-9]' --contains $v 2>/dev/null | cut -d'^' -f1`
+    [ -n "$v2" ] && v=$v2
+
     # Is this a new git that lists number of commits since the last
     # tag or the previous older version that did not?
     #   Newer: v6.10-77-g0f8faeb
@@ -124,7 +142,8 @@ then
 #    v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`;
     :
 else
-    v=UNKNOWN
+    echo 1>&2 "$0: Failed to determine git revision"
+    exit 1
 fi
 
 v=`echo "$v" |sed 's/^v//'`