#!/bin/sh # SPDX-License-Identifier: GPL-2.0 # # This scripts adds local version information from the version # control systems git, mercurial (hg) and subversion (svn). # # If something goes wrong, send a mail the kernel build mailinglist # (see MAINTAINERS) and CC Nico Schottelius # <nico-linuxsetlocalversion -at- schottelius.org>. # # usage() { echo "Usage: $0 [--save-scmversion] [srctree]" >&2 exit 1 } scm_only=false srctree=. if test "$1" = "--save-scmversion"; then scm_only=true shift fi if test $# -gt 0; then srctree=$1 shift fi if test $# -gt 0 -o ! -d "$srctree"; then usage fi scm_version() { local short short=false cd "$srctree" if test -e .scmversion; then cat .scmversion return fi if test "$1" = "--short"; then short=true fi # Check for git and a git repo. if test -z "$(git rev-parse --show-cdup 2>/dev/null)" && head=$(git rev-parse --verify HEAD 2>/dev/null); then # If we are at a tagged commit (like "v2.6.30-rc6"), we ignore # it, because this version is defined in the top level Makefile. if [ -z "$(git describe --exact-match 2>/dev/null)" ]; then # If only the short version is requested, don't bother # running further git commands if $short; then echo "+" return fi # If we are past a tagged commit (like # "v2.6.30-rc5-302-g72357d5"), we pretty print it. if atag="$(git describe 2>/dev/null)"; then echo "$atag" | awk -F- '{printf("-%05d", $(NF-1))}' fi # Add -g and exactly 12 hex chars. printf '%s%s' -g "$(echo $head | cut -c1-12)" fi # Check for uncommitted changes. # This script must avoid any write attempt to the source tree, # which might be read-only. # You cannot use 'git describe --dirty' because it tries to # create .git/index.lock . # First, with git-status, but --no-optional-locks is only # supported in git >= 2.14, so fall back to git-diff-index if # it fails. Note that git-diff-index does not refresh the # index, so it may give misleading results. See # git-update-index(1), git-diff-index(1), and git-status(1). if { git --no-optional-locks status -uno --porcelain 2>/dev/null || git diff-index --name-only HEAD } | read dummy; then printf '%s' -dirty fi fi } collect_files() { local file res= for file; do case "$file" in *\~*) continue ;; esac if test -e "$file"; then res="$res$(cat "$file")" fi done echo "$res" } if $scm_only; then if test ! -e .scmversion; then res=$(scm_version) echo "$res" >.scmversion fi exit fi if ! test -e include/config/auto.conf; then echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2 exit 1 fi # localversion* files in the build and source directory res="$(collect_files localversion*)" if test ! "$srctree" -ef .; then res="$res$(collect_files "$srctree"/localversion*)" fi # CONFIG_LOCALVERSION and LOCALVERSION (if set) config_localversion=$(sed -n 's/^CONFIG_LOCALVERSION=\(.*\)$/\1/p' include/config/auto.conf) res="${res}${config_localversion}${LOCALVERSION}" # scm version string if not at a tagged commit if grep -q "^CONFIG_LOCALVERSION_AUTO=y$" include/config/auto.conf; then # full scm version string res="$res$(scm_version)" elif [ "${LOCALVERSION+set}" != "set" ]; then # If the variable LOCALVERSION is not set, append a plus # sign if the repository is not in a clean annotated or # signed tagged state (as git describe only looks at signed # or annotated tags - git tag -a/-s). # # If the variable LOCALVERSION is set (including being set # to an empty string), we don't want to append a plus sign. scm=$(scm_version --short) res="$res${scm:++}" fi echo "$res"