guix - Wojtek's customized Guix

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Diffstat (limited to 'HACKING')

0 files changed, 0 insertions, 0 deletions

# 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 prefix of git tags (default 'v') --fallback VERSION 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/-/./;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$v_from_git" != x; then # Don't declare a version "dirty" merely because a timestamp has changed. git update-index --refresh > /dev/null 2>&1 dirty=`exec 2>/dev/null;git diff-index --name-only HEAD` || dirty= case "$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. printf %s "$v" # 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: "UTC0" # time-stamp-end: "; # UTC" # End:


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