poky/meta/recipes-devtools/strace/strace-4.9/git-version-gen

#!/bin/sh

Print a version string.

scriptversion=2012-12-31.23; # UTC

Copyright (C) 2007-2013 Free Software Foundation, Inc.

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 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

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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, 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 .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.

As with any generated file in a VC'd directory, you should add

/.version to .gitignore, so that you don't accidentally commit it.

.tarball-version is never generated in a VC'd directory, so needn't

be listed there.

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 .version and

.tarball-version will exist in distribution tarballs.

EXTRA_DIST = $(top_srcdir)/.version

BUILT_SOURCES = $(top_srcdir)/.version

$(top_srcdir)/.version:

echo $(VERSION) > $@-t && mv $@-t $@

dist-hook:

echo $(VERSION) > $(distdir)/.tarball-version

me=$0

version="git-version-gen $scriptversion

Copyright 2011 Free Software Foundation, Inc. There is NO warranty. You may redistribute this software under the terms of the GNU General Public License. For more information about these matters, see the files named COPYING."

usage="
Usage: $me [OPTION]... $srcdir/.tarball-version [TAG-NORMALIZATION-SED-SCRIPT] Print a version string.

Options:

--prefix prefix of git tags (default 'v') --fallback fallback version to use if "git --version" fails

--help display this help and exit --version output version information and exit

Running without arguments will suffice in most cases."

prefix=v fallback=

while test $# -gt 0; do case $1 in --help) echo "$usage"; exit 0;; --version) echo "$version"; exit 0;; --prefix) shift; prefix="$1";; --fallback) shift; fallback="$1";; -*) echo "$0: Unknown option '$1'." >&2 echo "$0: Try '--help' for more information." >&2 exit 1;; *) if test "x$tarball_version_file" = x; then tarball_version_file="$1" elif test "x$tag_sed_script" = x; then tag_sed_script="$1" else echo "$0: extra non-option argument '$1'." >&2 exit 1 fi;; esac shift done

if test "x$tarball_version_file" = x; then echo "$usage" exit 1 fi

tag_sed_script="${tag_sed_script:-s/x/x/}"

nl=' '

Avoid meddling by environment variable of the same name.

v= v_from_git=

First see if there is a tarball-only version file.

then try "git describe", then default.

if test -f $tarball_version_file then v=cat $tarball_version_file || v= case $v in $nl) v= ;; # reject multi-line output [0-9]*) ;; *) v= ;; esac test "x$v" = x
&& echo "$0: WARNING: $tarball_version_file is missing or damaged" 1>&2 fi

if test "x$v" != x then : # use $v

Otherwise, if there is at least one git commit involving the working

directory, and "git describe" output looks sensible, use that to

derive a version string.

elif test "git log -1 --pretty=format:x . 2>&1" = x
&& v=git describe --abbrev=4 --match="$prefix*" HEAD 2>/dev/null \ || git describe --abbrev=4 HEAD 2>/dev/null
&& v=printf '%s\n' "$v" | sed "$tag_sed_script"
&& case $v in $prefix[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/-.*//' commit_list=git rev-list "$vtag"..HEAD 2>/dev/null
|| { commit_list=failed; echo "$0: WARNING: git rev-list failed" 1>&2; } numcommits=echo "$commit_list" | wc -l v=echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"; test "$commit_list" = failed && v=UNKNOWN ;; 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/-/.0./;s/\(.*\)-g/\1-/'`;
v_from_git=1

elif test "x$fallback" = x || git --version >/dev/null 2>&1; then v=UNKNOWN else v=$fallback fi

v=echo "$v" |sed "s/^$prefix//"

Test whether to append the "-dirty" suffix only if the version

string we're using came from git. I.e., skip the test if it's "UNKNOWN"

or if it came from .tarball-version.

if test "x$v_from_git" != x; then

Don't declare a version "dirty" merely because a time stamp has changed.

git update-index --refresh > /dev/null 2>&1

dirty=exec 2>/dev/null;git diff-index --name-only HEAD || dirty= case "$dirty" in '') ;; *) # Append the suffix only if there isn't one already. case $v in *-dirty) ;; *) v="$v-dirty" ;; esac ;; esac fi

Omit the trailing newline, so that m4_esyscmd can use the result directly.

echo "$v" | tr -d "$nl"

Local variables:

eval: (add-hook 'write-file-hooks 'time-stamp)

time-stamp-start: "scriptversion="

time-stamp-format: "%:y-%02m-%02d.%02H"

time-stamp-time-zone: "UTC"

time-stamp-end: "; # UTC"

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