Annotation of embedaddon/mtr/build-aux/git-version-gen, revision 1.1
1.1 ! misho 1: #!/bin/sh
! 2: # Print a version string.
! 3: scriptversion=2016-05-08.18; # UTC
! 4:
! 5: # Copyright (C) 2007-2016 Free Software Foundation, Inc.
! 6: #
! 7: # This program is free software: you can redistribute it and/or modify
! 8: # it under the terms of the GNU General Public License as published by
! 9: # the Free Software Foundation; either version 3 of the License, or
! 10: # (at your option) any later version.
! 11: #
! 12: # This program is distributed in the hope that it will be useful,
! 13: # but WITHOUT ANY WARRANTY; without even the implied warranty of
! 14: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! 15: # GNU General Public License for more details.
! 16: #
! 17: # You should have received a copy of the GNU General Public License
! 18: # along with this program. If not, see <http://www.gnu.org/licenses/>.
! 19:
! 20: # This script is derived from GIT-VERSION-GEN from GIT: http://git.or.cz/.
! 21: # It may be run two ways:
! 22: # - from a git repository in which the "git describe" command below
! 23: # produces useful output (thus requiring at least one signed tag)
! 24: # - from a non-git-repo directory containing a .tarball-version file, which
! 25: # presumes this script is invoked like "./git-version-gen .tarball-version".
! 26:
! 27: # In order to use intra-version strings in your project, you will need two
! 28: # separate generated version string files:
! 29: #
! 30: # .tarball-version - present only in a distribution tarball, and not in
! 31: # a checked-out repository. Created with contents that were learned at
! 32: # the last time autoconf was run, and used by git-version-gen. Must not
! 33: # be present in either $(srcdir) or $(builddir) for git-version-gen to
! 34: # give accurate answers during normal development with a checked out tree,
! 35: # but must be present in a tarball when there is no version control system.
! 36: # Therefore, it cannot be used in any dependencies. GNUmakefile has
! 37: # hooks to force a reconfigure at distribution time to get the value
! 38: # correct, without penalizing normal development with extra reconfigures.
! 39: #
! 40: # .version - present in a checked-out repository and in a distribution
! 41: # tarball. Usable in dependencies, particularly for files that don't
! 42: # want to depend on config.h but do want to track version changes.
! 43: # Delete this file prior to any autoconf run where you want to rebuild
! 44: # files to pick up a version string change; and leave it stale to
! 45: # minimize rebuild time after unrelated changes to configure sources.
! 46: #
! 47: # As with any generated file in a VC'd directory, you should add
! 48: # /.version to .gitignore, so that you don't accidentally commit it.
! 49: # .tarball-version is never generated in a VC'd directory, so needn't
! 50: # be listed there.
! 51: #
! 52: # Use the following line in your configure.ac, so that $(VERSION) will
! 53: # automatically be up-to-date each time configure is run (and note that
! 54: # since configure.ac no longer includes a version string, Makefile rules
! 55: # should not depend on configure.ac for version updates).
! 56: #
! 57: # AC_INIT([GNU project],
! 58: # m4_esyscmd([build-aux/git-version-gen .tarball-version]),
! 59: # [bug-project@example])
! 60: #
! 61: # Then use the following lines in your Makefile.am, so that .version
! 62: # will be present for dependencies, and so that .version and
! 63: # .tarball-version will exist in distribution tarballs.
! 64: #
! 65: # EXTRA_DIST = $(top_srcdir)/.version
! 66: # BUILT_SOURCES = $(top_srcdir)/.version
! 67: # $(top_srcdir)/.version:
! 68: # echo $(VERSION) > $@-t && mv $@-t $@
! 69: # dist-hook:
! 70: # echo $(VERSION) > $(distdir)/.tarball-version
! 71:
! 72:
! 73: me=$0
! 74:
! 75: version="git-version-gen $scriptversion
! 76:
! 77: Copyright 2011 Free Software Foundation, Inc.
! 78: There is NO warranty. You may redistribute this software
! 79: under the terms of the GNU General Public License.
! 80: For more information about these matters, see the files named COPYING."
! 81:
! 82: usage="\
! 83: Usage: $me [OPTION]... \$srcdir/.tarball-version [TAG-NORMALIZATION-SED-SCRIPT]
! 84: Print a version string.
! 85:
! 86: Options:
! 87:
! 88: --prefix PREFIX prefix of git tags (default 'v')
! 89: --fallback VERSION
! 90: fallback version to use if \"git --version\" fails
! 91:
! 92: --help display this help and exit
! 93: --version output version information and exit
! 94:
! 95: Running without arguments will suffice in most cases."
! 96:
! 97: prefix=v
! 98: fallback=
! 99:
! 100: while test $# -gt 0; do
! 101: case $1 in
! 102: --help) echo "$usage"; exit 0;;
! 103: --version) echo "$version"; exit 0;;
! 104: --prefix) shift; prefix=${1?};;
! 105: --fallback) shift; fallback=${1?};;
! 106: -*)
! 107: echo "$0: Unknown option '$1'." >&2
! 108: echo "$0: Try '--help' for more information." >&2
! 109: exit 1;;
! 110: *)
! 111: if test "x$tarball_version_file" = x; then
! 112: tarball_version_file="$1"
! 113: elif test "x$tag_sed_script" = x; then
! 114: tag_sed_script="$1"
! 115: else
! 116: echo "$0: extra non-option argument '$1'." >&2
! 117: exit 1
! 118: fi;;
! 119: esac
! 120: shift
! 121: done
! 122:
! 123: if test "x$tarball_version_file" = x; then
! 124: echo "$usage"
! 125: exit 1
! 126: fi
! 127:
! 128: tag_sed_script="${tag_sed_script:-s/x/x/}"
! 129:
! 130: nl='
! 131: '
! 132:
! 133: # Avoid meddling by environment variable of the same name.
! 134: v=
! 135: v_from_git=
! 136:
! 137: # First see if there is a tarball-only version file.
! 138: # then try "git describe", then default.
! 139: if test -f $tarball_version_file
! 140: then
! 141: v=`cat $tarball_version_file` || v=
! 142: case $v in
! 143: *$nl*) v= ;; # reject multi-line output
! 144: [0-9]*) ;;
! 145: *) v= ;;
! 146: esac
! 147: test "x$v" = x \
! 148: && echo "$0: WARNING: $tarball_version_file is missing or damaged" 1>&2
! 149: fi
! 150:
! 151: if test "x$v" != x
! 152: then
! 153: : # use $v
! 154: # Otherwise, if there is at least one git commit involving the working
! 155: # directory, and "git describe" output looks sensible, use that to
! 156: # derive a version string.
! 157: elif test "`git log -1 --pretty=format:x . 2>&1`" = x \
! 158: && v=`git describe --abbrev=4 --match="$prefix*" HEAD 2>/dev/null \
! 159: || git describe --abbrev=4 HEAD 2>/dev/null` \
! 160: && v=`printf '%s\n' "$v" | sed "$tag_sed_script"` \
! 161: && case $v in
! 162: $prefix[0-9]*) ;;
! 163: *) (exit 1) ;;
! 164: esac
! 165: then
! 166: # Is this a new git that lists number of commits since the last
! 167: # tag or the previous older version that did not?
! 168: # Newer: v6.10-77-g0f8faeb
! 169: # Older: v6.10-g0f8faeb
! 170: case $v in
! 171: *-*-*) : git describe is okay three part flavor ;;
! 172: *-*)
! 173: : git describe is older two part flavor
! 174: # Recreate the number of commits and rewrite such that the
! 175: # result is the same as if we were using the newer version
! 176: # of git describe.
! 177: vtag=`echo "$v" | sed 's/-.*//'`
! 178: commit_list=`git rev-list "$vtag"..HEAD 2>/dev/null` \
! 179: || { commit_list=failed;
! 180: echo "$0: WARNING: git rev-list failed" 1>&2; }
! 181: numcommits=`echo "$commit_list" | wc -l`
! 182: v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`;
! 183: test "$commit_list" = failed && v=UNKNOWN
! 184: ;;
! 185: esac
! 186:
! 187: # Change the first '-' to a '.', so version-comparing tools work properly.
! 188: # Remove the "g" in git describe's output string, to save a byte.
! 189: v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`;
! 190: v_from_git=1
! 191: elif test "x$fallback" = x || git --version >/dev/null 2>&1; then
! 192: v=UNKNOWN
! 193: else
! 194: v=$fallback
! 195: fi
! 196:
! 197: v=`echo "$v" |sed "s/^$prefix//"`
! 198:
! 199: # Test whether to append the "-dirty" suffix only if the version
! 200: # string we're using came from git. I.e., skip the test if it's "UNKNOWN"
! 201: # or if it came from .tarball-version.
! 202: if test "x$v_from_git" != x; then
! 203: # Don't declare a version "dirty" merely because a time stamp has changed.
! 204: git update-index --refresh > /dev/null 2>&1
! 205:
! 206: dirty=`exec 2>/dev/null;git diff-index --name-only HEAD` || dirty=
! 207: case "$dirty" in
! 208: '') ;;
! 209: *) # Append the suffix only if there isn't one already.
! 210: case $v in
! 211: *-dirty) ;;
! 212: *) v="$v-dirty" ;;
! 213: esac ;;
! 214: esac
! 215: fi
! 216:
! 217: # Omit the trailing newline, so that m4_esyscmd can use the result directly.
! 218: printf %s "$v"
! 219:
! 220: # Local variables:
! 221: # eval: (add-hook 'write-file-hooks 'time-stamp)
! 222: # time-stamp-start: "scriptversion="
! 223: # time-stamp-format: "%:y-%02m-%02d.%02H"
! 224: # time-stamp-time-zone: "UTC0"
! 225: # time-stamp-end: "; # UTC"
! 226: # End:
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