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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-or-later
# Generate and compare the ABI compatibilty of two libcamera versions
name=$(basename "$0")
usage() {
cat << EOF
$name: Determine the ABI/API compatibility of two build versions
$name [--help] [--abi-dir=<PATH>] [--tmp-dir=<PATH>] ARGS
The positional arguments (ARGS) determine the versions that will be compared and
take three variants:
- No positional arguments:
$name [optional arguments]
It is assumed to compare the current git HEAD against the most recent TAG
- One positional argument:
$name [optional aguments] COMMITISH
The given COMMITISH is compared against it's most recent TAG
- Two positional arguments:
$name [optional aguments] BASE COMMITISH
The given COMMITISH is compared against the given BASE.
Optional Arguments:
--abi-dir <path> Use <path> for storing (or retrieving existing) ABI data
files
--tmp-dir <path> Specify temporary build location for building ABI data.
This could be a tmpfs/RAM disk to save on disk writes.
EOF
}
dbg () {
echo "$@" >&2
}
die () {
echo "$name: $*" >&2
exit 1
}
describe () {
git describe --tags "$1" \
|| die "Failed to describe $1"
}
prev_release () {
git describe --tags --abbrev=0 "$1"^ \
|| die "Failed to identify previous release tag from $1"
}
# Make sure we exit on errors during argument parsing.
set -Eeuo pipefail
positional=()
while [[ $# -gt 0 ]] ; do
option="$1"
shift
case $option in
-h|--help)
usage
exit 0
;;
--abi-dir)
abi_dir=$1
shift
;;
--tmp-dir)
tmp=$1
shift
;;
-*)
die "Unrecognised argument $option"
;;
*) # Parse unidentified arguments based on position.
positional+=("$option")
;;
esac
done
set -- "${positional[@]}" # restore positional parameters.
# Parse positional arguments.
case $# in
0) # Check HEAD against previous 'release'.
from=$(prev_release HEAD)
to=$(describe HEAD)
;;
1) # Check COMMIT against previous release.
from=$(prev_release "$1")
to=$(describe "$1")
;;
2) # Check ABI between FROM and TO explicitly.
from=$(describe "$1")
to=$(describe "$2")
;;
*)
die "Invalid arguments"
;;
esac
if ! which abi-compliance-checker; then
die "This tool requires 'abi-compliance-checker' to be installed."
fi
abi_dir=${abi_dir:-abi}
tmp=${tmp:-"$abi_dir/tmp/"}
echo "Validating ABI compatibility between $from and $to"
mkdir -p "$abi_dir"
mkdir -p "$tmp"
# Generate an abi-compliance-checker xml description file.
create_xml() {
local output="$1"
local version="$2"
local root="$3"
echo "<version>$version</version>" > "$output"
echo "<headers>$root/usr/local/include/</headers>" >> "$output"
echo "<libs>$root/usr/local/lib/</libs>" >> "$output"
}
# Check if an ABI dump file exists, and if not create one by building a minimal
# configuration of libcamera at the specified version using a clean worktree.
create_abi_dump() {
local version="$1"
local abi_file="$abi_dir/$version.abi.dump"
local worktree="$tmp/$version"
local build="$tmp/$version-build"
# Use a fully qualified path when calling ninja -C.
install=$(realpath "$tmp/$version-install")
if [[ ! -e "$abi_file" ]] ; then
dbg "Creating ABI dump for $version in $abi_dir"
git worktree add --force "$worktree" "$version"
# Generate a minimal libcamera build. "lib" and "prefix" are
# defined explicitly to avoid system default ambiguities.
meson setup "$build" "$worktree" \
-Dlibdir=lib \
-Dprefix=/usr/local/ \
-Ddocumentation=disabled \
-Dcam=disabled \
-Dqcam=disabled \
-Dpycamera=disabled \
-Dgstreamer=disabled \
-Dlc-compliance=disabled \
-Dtracing=disabled \
-Dpipelines=
ninja -C "$build"
DESTDIR="$install" ninja -C "$build" install
# Create an xml descriptor with parameters to generate the dump file.
create_xml \
"$install/libcamera-abi-dump.xml" \
"$version" \
"$install"
abi-compliance-checker \
-lib libcamera \
-v1 "$version" \
-dump "$install/libcamera-abi-dump.xml" \
-dump-path "$abi_file"
dbg Created "$abi_file"
dbg Removing Worktree "$worktree"
git worktree remove -f "$worktree"
dbg Removing "$build"
rm -r "$build"
dbg Removing "$install"
rm -r "$install"
fi
}
# Create the requested ABI dump files if they don't yet exist.
create_abi_dump "$from"
create_abi_dump "$to"
# TODO: Future iterations and extensions here could add "-stdout -xml" and
# parse the results automatically.
abi-compliance-checker -l libcamera \
-old "$abi_dir/$from.abi.dump" \
-new "$abi_dir/$to.abi.dump"
# On (far too many) occasions, the tools keep running leaving a cpu core @ 100%
# CPU usage. Perhaps some subprocess gets launched but never rejoined. Stop
# them all.
#
# TODO: Investigate this and report upstream.
killall abi-compliance-checker 2>/dev/null
|
