diff options
Diffstat (limited to 'meta/lib/oe/reproducible.py')
| -rw-r--r-- | meta/lib/oe/reproducible.py | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/meta/lib/oe/reproducible.py b/meta/lib/oe/reproducible.py new file mode 100644 index 0000000000..204b9bd734 --- /dev/null +++ b/meta/lib/oe/reproducible.py @@ -0,0 +1,108 @@ +# +# SPDX-License-Identifier: GPL-2.0-only +# +import os +import subprocess +import bb + +def get_source_date_epoch_from_known_files(d, sourcedir): + source_date_epoch = None + newest_file = None + known_files = set(["NEWS", "ChangeLog", "Changelog", "CHANGES"]) + for file in known_files: + filepath = os.path.join(sourcedir, file) + if os.path.isfile(filepath): + mtime = int(os.lstat(filepath).st_mtime) + # There may be more than one "known_file" present, if so, use the youngest one + if not source_date_epoch or mtime > source_date_epoch: + source_date_epoch = mtime + newest_file = filepath + if newest_file: + bb.debug(1, "SOURCE_DATE_EPOCH taken from: %s" % newest_file) + return source_date_epoch + +def find_git_folder(d, sourcedir): + # First guess: WORKDIR/git + # This is the default git fetcher unpack path + workdir = d.getVar('WORKDIR') + gitpath = os.path.join(workdir, "git/.git") + if os.path.isdir(gitpath): + return gitpath + + # Second guess: ${S} + gitpath = os.path.join(sourcedir, ".git") + if os.path.isdir(gitpath): + return gitpath + + # Perhaps there was a subpath or destsuffix specified. + # Go looking in the WORKDIR + exclude = set(["build", "image", "license-destdir", "patches", "pseudo", + "recipe-sysroot", "recipe-sysroot-native", "sysroot-destdir", "temp"]) + for root, dirs, files in os.walk(workdir, topdown=True): + dirs[:] = [d for d in dirs if d not in exclude] + if '.git' in dirs: + return root + + bb.warn("Failed to find a git repository in WORKDIR: %s" % workdir) + return None + +def get_source_date_epoch_from_git(d, sourcedir): + if not "git://" in d.getVar('SRC_URI') and not "gitsm://" in d.getVar('SRC_URI'): + return None + + gitpath = find_git_folder(d, sourcedir) + if not gitpath: + return None + + # Check that the repository has a valid HEAD; it may not if subdir is used + # in SRC_URI + p = subprocess.run(['git', '--git-dir', gitpath, 'rev-parse', 'HEAD'], stdout=subprocess.PIPE, stderr=subprocess.STDOUT) + if p.returncode != 0: + bb.debug(1, "%s does not have a valid HEAD: %s" % (gitpath, p.stdout.decode('utf-8'))) + return None + + bb.debug(1, "git repository: %s" % gitpath) + p = subprocess.run(['git', '--git-dir', gitpath, 'log', '-1', '--pretty=%ct'], check=True, stdout=subprocess.PIPE) + return int(p.stdout.decode('utf-8')) + +def get_source_date_epoch_from_youngest_file(d, sourcedir): + if sourcedir == d.getVar('WORKDIR'): + # These sources are almost certainly not from a tarball + return None + + # Do it the hard way: check all files and find the youngest one... + source_date_epoch = None + newest_file = None + for root, dirs, files in os.walk(sourcedir, topdown=True): + files = [f for f in files if not f[0] == '.'] + + for fname in files: + filename = os.path.join(root, fname) + try: + mtime = int(os.lstat(filename).st_mtime) + except ValueError: + mtime = 0 + if not source_date_epoch or mtime > source_date_epoch: + source_date_epoch = mtime + newest_file = filename + + if newest_file: + bb.debug(1, "Newest file found: %s" % newest_file) + return source_date_epoch + +def fixed_source_date_epoch(d): + bb.debug(1, "No tarball or git repo found to determine SOURCE_DATE_EPOCH") + source_date_epoch = d.getVar('SOURCE_DATE_EPOCH_FALLBACK') + if source_date_epoch: + bb.debug(1, "Using SOURCE_DATE_EPOCH_FALLBACK") + return int(source_date_epoch) + return 0 + +def get_source_date_epoch(d, sourcedir): + return ( + get_source_date_epoch_from_git(d, sourcedir) or + get_source_date_epoch_from_known_files(d, sourcedir) or + get_source_date_epoch_from_youngest_file(d, sourcedir) or + fixed_source_date_epoch(d) # Last resort + ) + |