#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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#
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# This scripts adds local version information from the version
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# control systems git, mercurial (hg) and subversion (svn).
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#
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# If something goes wrong, send a mail the kernel build mailinglist
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# (see MAINTAINERS) and CC Nico Schottelius
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# <nico-linuxsetlocalversion -at- schottelius.org>.
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#
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#
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usage() {
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echo "Usage: $0 [--save-scmversion] [srctree] [branch] [kmi-generation]" >&2
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exit 1
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}
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scm_only=false
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srctree=.
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android_release=
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kmi_generation=
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if test "$1" = "--save-scmversion"; then
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scm_only=true
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shift
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fi
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if test $# -gt 0; then
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srctree=$1
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shift
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fi
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if test $# -gt 0; then
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# Extract the Android release version. If there is no match, then return 255
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# and clear the var $android_release
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android_release=`echo "$1" | sed -e '/android[0-9]\{2,\}/!{q255}; \
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s/^\(android[0-9]\{2,\}\)-.*/\1/'`
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if test $? -ne 0; then
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android_release=
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fi
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shift
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if test $# -gt 0; then
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kmi_generation=$1
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[ $(expr $kmi_generation : '^[0-9]\+$') -eq 0 ] && usage
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shift
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fi
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fi
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if test $# -gt 0 -o ! -d "$srctree"; then
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usage
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fi
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scm_version()
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{
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local short
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short=false
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cd "$srctree"
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if test -e .scmversion; then
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cat .scmversion
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return
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fi
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if test "$1" = "--short"; then
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short=true
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fi
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# Check for git and a git repo.
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if head=$(git rev-parse --verify HEAD 2>/dev/null); then
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if [ -n "$android_release" ] && [ -n "$kmi_generation" ]; then
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printf '%s' "-$android_release-$kmi_generation"
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elif [ -n "$android_release" ]; then
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printf '%s' "-$android_release"
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fi
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# If we are at a tagged commit (like "v2.6.30-rc6"), we ignore
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# it, because this version is defined in the top level Makefile.
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if [ -z "$(git describe --exact-match 2>/dev/null)" ]; then
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# If only the short version is requested, don't bother
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# running further git commands
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if $short; then
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echo "+"
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return
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fi
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# If we are past a tagged commit (like
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# "v2.6.30-rc5-302-g72357d5"), we pretty print it.
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#
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# Ensure the abbreviated sha1 has exactly 12
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# hex characters, to make the output
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# independent of git version, local
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# core.abbrev settings and/or total number of
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# objects in the current repository - passing
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# --abbrev=12 ensures a minimum of 12, and the
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# awk substr() then picks the 'g' and first 12
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# hex chars.
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if atag="$(git describe --abbrev=12 2>/dev/null)"; then
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echo "$atag" | awk -F- '{printf("-%05d-%s", $(NF-1),substr($(NF),0,13))}'
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# If we don't have a tag at all we print -g{commitish},
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# again using exactly 12 hex chars.
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else
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head="$(echo $head | cut -c1-12)"
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printf '%s%s' -g $head
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fi
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fi
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# Is this git on svn?
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if git config --get svn-remote.svn.url >/dev/null; then
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printf -- '-svn%s' "$(git svn find-rev $head)"
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fi
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# Check for uncommitted changes.
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# First, with git-status, but --no-optional-locks is only
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# supported in git >= 2.14, so fall back to git-diff-index if
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# it fails. Note that git-diff-index does not refresh the
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# index, so it may give misleading results. See
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# git-update-index(1), git-diff-index(1), and git-status(1).
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if {
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git --no-optional-locks status -uno --porcelain 2>/dev/null ||
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git diff-index --name-only HEAD
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} | grep -qvE '^(.. )?scripts/package'; then
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printf '%s' -dirty
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fi
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# All done with git
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return
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fi
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# Check for mercurial and a mercurial repo.
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if hgid=$(hg id 2>/dev/null); then
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# Do we have an tagged version? If so, latesttagdistance == 1
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if [ "$(hg log -r . --template '{latesttagdistance}')" = "1" ]; then
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id=$(hg log -r . --template '{latesttag}')
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printf '%s%s' -hg "$id"
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else
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tag=$(printf '%s' "$hgid" | cut -d' ' -f2)
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if [ -z "$tag" -o "$tag" = tip ]; then
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id=$(printf '%s' "$hgid" | sed 's/[+ ].*//')
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printf '%s%s' -hg "$id"
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fi
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fi
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# Are there uncommitted changes?
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# These are represented by + after the changeset id.
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case "$hgid" in
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*+|*+\ *) printf '%s' -dirty ;;
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esac
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# All done with mercurial
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return
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fi
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# Check for svn and a svn repo.
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if rev=$(LANG= LC_ALL= LC_MESSAGES=C svn info 2>/dev/null | grep '^Last Changed Rev'); then
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rev=$(echo $rev | awk '{print $NF}')
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printf -- '-svn%s' "$rev"
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# All done with svn
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return
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fi
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}
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collect_files()
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{
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local file res=
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for file; do
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case "$file" in
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*\~*)
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continue
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;;
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esac
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if test -e "$file"; then
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res="$res$(cat "$file")"
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fi
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done
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echo "$res"
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}
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if $scm_only; then
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if test ! -e .scmversion; then
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res=$(scm_version)
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echo "$res" >.scmversion
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fi
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exit
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fi
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if test -e include/config/auto.conf; then
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. include/config/auto.conf
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else
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echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2
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exit 1
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fi
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# localversion* files in the build and source directory
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res="$(collect_files localversion*)"
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if test ! "$srctree" -ef .; then
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res="$res$(collect_files "$srctree"/localversion*)"
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fi
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# CONFIG_LOCALVERSION and LOCALVERSION (if set)
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res="${res}${CONFIG_LOCALVERSION}${LOCALVERSION}"
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# scm version string if not at a tagged commit
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if test "$CONFIG_LOCALVERSION_AUTO" = "y"; then
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# full scm version string
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res="$res$(scm_version)"
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else
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# append a plus sign if the repository is not in a clean
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# annotated or signed tagged state (as git describe only
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# looks at signed or annotated tags - git tag -a/-s) and
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# LOCALVERSION= is not specified
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if test "${LOCALVERSION+set}" != "set"; then
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scm=$(scm_version --short)
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res="$res${scm:++}"
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fi
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fi
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echo "$res"
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