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-rwxr-xr-xscripts/setlocalversion186
1 files changed, 186 insertions, 0 deletions
diff --git a/scripts/setlocalversion b/scripts/setlocalversion
new file mode 100755
index 0000000000..38b96c6797
--- /dev/null
+++ b/scripts/setlocalversion
@@ -0,0 +1,186 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# This scripts adds local version information from the version
+# control system git.
+#
+# 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 [--no-local] [srctree]" >&2
+ exit 1
+}
+
+no_local=false
+if test "$1" = "--no-local"; then
+ no_local=true
+ shift
+fi
+
+srctree=.
+if test $# -gt 0; then
+ srctree=$1
+ shift
+fi
+if test $# -gt 0 -o ! -d "$srctree"; then
+ usage
+fi
+
+scm_version()
+{
+ local short=false
+ local no_dirty=false
+ local tag
+
+ while [ $# -gt 0 ];
+ do
+ case "$1" in
+ --short)
+ short=true;;
+ --no-dirty)
+ no_dirty=true;;
+ esac
+ shift
+ done
+
+ cd "$srctree"
+
+ if test -n "$(git rev-parse --show-cdup 2>/dev/null)"; then
+ return
+ fi
+
+ if ! head=$(git rev-parse --verify HEAD 2>/dev/null); then
+ return
+ fi
+
+ # mainline kernel: 6.2.0-rc5 -> v6.2-rc5
+ # stable kernel: 6.1.7 -> v6.1.7
+ version_tag=v$(echo "${KERNELVERSION}" | sed -E 's/^([0-9]+\.[0-9]+)\.0(.*)$/\1\2/')
+
+ # If a localversion* file exists, and the corresponding
+ # annotated tag exists and is an ancestor of HEAD, use
+ # it. This is the case in linux-next.
+ tag=${file_localversion#-}
+ desc=
+ if [ -n "${tag}" ]; then
+ desc=$(git describe --match=$tag 2>/dev/null)
+ fi
+
+ # Otherwise, if a localversion* file exists, and the tag
+ # obtained by appending it to the tag derived from
+ # KERNELVERSION exists and is an ancestor of HEAD, use
+ # it. This is e.g. the case in linux-rt.
+ if [ -z "${desc}" ] && [ -n "${file_localversion}" ]; then
+ tag="${version_tag}${file_localversion}"
+ desc=$(git describe --match=$tag 2>/dev/null)
+ fi
+
+ # Otherwise, default to the annotated tag derived from KERNELVERSION.
+ if [ -z "${desc}" ]; then
+ tag="${version_tag}"
+ desc=$(git describe --match=$tag 2>/dev/null)
+ fi
+
+ # If we are at the tagged commit, we ignore it because the version is
+ # well-defined.
+ if [ "${tag}" != "${desc}" ]; then
+
+ # If only the short version is requested, don't bother
+ # running further git commands
+ if $short; then
+ echo "+"
+ return
+ fi
+ # If we are past the tagged commit, we pretty print it.
+ # (like 6.1.0-14595-g292a089d78d3)
+ if [ -n "${desc}" ]; then
+ echo "${desc}" | awk -F- '{printf("-%05d", $(NF-1))}'
+ fi
+
+ # Add -g and exactly 12 hex chars.
+ printf '%s%s' -g "$(echo $head | cut -c1-12)"
+ fi
+
+ if ${no_dirty}; then
+ return
+ fi
+
+ # Check for uncommitted changes.
+ # This script must avoid any write attempt to the source tree, which
+ # might be read-only.
+ # You cannot use 'git describe --dirty' because it tries to create
+ # .git/index.lock .
+ # First, with git-status, but --no-optional-locks is only supported in
+ # git >= 2.14, so fall back to git-diff-index if it fails. Note that
+ # git-diff-index does not refresh the index, so it may give misleading
+ # results.
+ # See git-update-index(1), git-diff-index(1), and git-status(1).
+ if {
+ git --no-optional-locks status -uno --porcelain 2>/dev/null ||
+ git diff-index --name-only HEAD
+ } | read dummy; then
+ printf '%s' -dirty
+ fi
+}
+
+collect_files()
+{
+ local file res=
+
+ for file; do
+ case "$file" in
+ *\~*)
+ continue
+ ;;
+ esac
+ if test -e "$file"; then
+ res="$res$(cat "$file")"
+ fi
+ done
+ echo "$res"
+}
+
+if [ -z "${KERNELVERSION}" ]; then
+ echo "KERNELVERSION is not set" >&2
+ exit 1
+fi
+
+# localversion* files in the build and source directory
+file_localversion="$(collect_files localversion*)"
+if test ! "$srctree" -ef .; then
+ file_localversion="${file_localversion}$(collect_files "$srctree"/localversion*)"
+fi
+
+if ${no_local}; then
+ echo "${KERNELVERSION}$(scm_version --no-dirty)"
+ exit 0
+fi
+
+if ! test -e include/config/auto.conf; then
+ echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2
+ exit 1
+fi
+
+# version string from CONFIG_LOCALVERSION
+config_localversion=$(sed -n 's/^CONFIG_LOCALVERSION=\(.*\)$/\1/p' include/config/auto.conf)
+
+# scm version string if not at the kernel version tag or at the file_localversion
+if grep -q "^CONFIG_LOCALVERSION_AUTO=y$" include/config/auto.conf; then
+ # full scm version string
+ scm_version="$(scm_version)"
+elif [ "${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_version="$(scm_version --short)"
+fi
+
+echo "${KERNELVERSION}${file_localversion}${config_localversion}${LOCALVERSION}${scm_version}"