X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=build-aux%2Fgit-version-gen;h=8317604f8fd5eb07d46a8a3c4e2a2ca24b5b442b;hb=7c3e409e535bb5da1cdb1a5664d0b7c4fddffd61;hp=1d58adc725b5d4817101d917750bbed7490975a4;hpb=77b76ce0d1c6af26563467f7dd38bf89a0d57e90;p=gnulib.git

diff --git a/build-aux/git-version-gen b/build-aux/git-version-gen
index 1d58adc72..8317604f8 100755
--- a/build-aux/git-version-gen
+++ b/build-aux/git-version-gen
@@ -1,13 +1,13 @@
 #!/bin/sh
 # Print a version string.
-scriptversion=2008-02-08.11
+scriptversion=2009-09-09.22
 
-# Copyright (C) 2007 Free Software Foundation
+# Copyright (C) 2007-2009 Free Software Foundation
 #
-# This program is free software; you can redistribute it and/or modify
+# This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -15,20 +15,60 @@ scriptversion=2008-02-08.11
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-# 02110-1301, USA.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # This script is derived from GIT-VERSION-GEN from GIT: http://git.or.cz/.
 # It may be run two ways:
 # - from a git repository in which the "git describe" command below
 #   produces useful output (thus requiring at least one signed tag)
-# - from a non-git-repo directory containing a .version file, which
+# - from a non-git-repo directory containing a .tarball-version file, which
 #   presumes this script is invoked like "./git-version-gen .tarball-version".
 
+# In order to use intra-version strings in your project, you will need two
+# separate generated version string files:
+#
+# .tarball-version - present only in a distribution tarball, and not in
+#   a checked-out repository.  Created with contents that were learned at
+#   the last time autoconf was run, and used by git-version-gen.  Must not
+#   be present in either $(srcdir) or $(builddir) for git-version-gen to
+#   give accurate answers during normal development with a checked out tree,
+#   but must be present in a tarball when there is no version control system.
+#   Therefore, it cannot be used in any dependencies.  GNUmakefile has
+#   hooks to force a reconfigure at distribution time to get the value
+#   correct, without penalizing normal development with extra reconfigures.
+#
+# .version - present in a checked-out repository and in a distribution
+#   tarball.  Usable in dependencies, particularly for files that don't
+#   want to depend on config.h but do want to track version changes.
+#   Delete this file prior to any autoconf run where you want to rebuild
+#   files to pick up a version string change; and leave it stale to
+#   minimize rebuild time after unrelated changes to configure sources.
+#
+# It is probably wise to add these two files to .gitignore, so that you
+# don't accidentally commit either generated file.
+#
+# Use the following line in your configure.ac, so that $(VERSION) will
+# automatically be up-to-date each time configure is run (and note that
+# since configure.ac no longer includes a version string, Makefile rules
+# should not depend on configure.ac for version updates).
+#
+# AC_INIT([GNU project],
+#         m4_esyscmd([build-aux/git-version-gen .tarball-version]),
+#         [bug-project@example])
+#
+# Then use the following lines in your Makefile.am, so that .version
+# will be present for dependencies, and so that .tarball-version will
+# exist in distribution tarballs.
+#
+# BUILT_SOURCES = $(top_srcdir)/.version
+# $(top_srcdir)/.version:
+#	echo $(VERSION) > $@-t && mv $@-t $@
+# dist-hook:
+#	echo $(VERSION) > $(distdir)/.tarball-version
+
 case $# in
     1) ;;
-    *) echo 1>&2 "Usage: $0 \$srcdir/.version"; exit 1;;
+    *) echo 1>&2 "Usage: $0 \$srcdir/.tarball-version"; exit 1;;
 esac
 
 tarball_version_file=$1
@@ -53,12 +93,30 @@ if test -n "$v"
 then
     : # use $v
 elif test -d .git \
-    && v=`git describe --abbrev=4 HEAD 2>/dev/null` \
+    && 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
 then
+    # 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
+    #   Older: v6.10-g0f8faeb
+    case $v in
+	*-*-*) : git describe is okay three part flavor ;;
+	*-*)
+	    : git describe is older two part flavor
+	    # Recreate the number of commits and rewrite such that the
+	    # result is the same as if we were using the newer version
+	    # of git describe.
+	    vtag=`echo "$v" | sed 's/-.*//'`
+	    numcommits=`git rev-list "$vtag"..HEAD | wc -l`
+	    v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`;
+	    ;;
+    esac
+
     # Change the first '-' to a '.', so version-comparing tools work properly.
     # Remove the "g" in git describe's output string, to save a byte.
     v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`;