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project: abort a bit earlier before migrating .git/
Verify all the .git/ paths will be handled by the migration logic before starting the migration. This way we still abort & log an error, but the user gets to see it before we put the tree into a state that they have to manually recover. Also add a few more known-safe-to-clobber paths. Bug: https://crbug.com/gerrit/15273 Change-Id: If49d69b341bc960ddcafa30da333fb5ec7145b51 Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/327557 Reviewed-by: Colin Cross <ccross@android.com> Tested-by: Mike Frysinger <vapier@google.com>
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parent
71e48b7672
commit
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32
project.py
32
project.py
@ -2818,24 +2818,40 @@ class Project(object):
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}
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}
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# Paths that we know will be in both, but are safe to clobber in .repo/projects/.
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# Paths that we know will be in both, but are safe to clobber in .repo/projects/.
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SAFE_TO_CLOBBER = {
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SAFE_TO_CLOBBER = {
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'COMMIT_EDITMSG', 'FETCH_HEAD', 'HEAD', 'index', 'ORIG_HEAD',
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'COMMIT_EDITMSG', 'FETCH_HEAD', 'HEAD', 'gitk.cache', 'index', 'ORIG_HEAD',
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}
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}
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# First see if we'd succeed before starting the migration.
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unknown_paths = []
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for name in platform_utils.listdir(dotgit):
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# Ignore all temporary/backup names. These are common with vim & emacs.
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if name.endswith('~') or (name[0] == '#' and name[-1] == '#'):
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continue
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dotgit_path = os.path.join(dotgit, name)
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if name in KNOWN_LINKS:
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if not platform_utils.islink(dotgit_path):
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unknown_paths.append(f'{dotgit_path}: should be a symlink')
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else:
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gitdir_path = os.path.join(gitdir, name)
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if name not in SAFE_TO_CLOBBER and os.path.exists(gitdir_path):
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unknown_paths.append(f'{dotgit_path}: unknown file; please file a bug')
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if unknown_paths:
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raise GitError('Aborting migration: ' + '\n'.join(unknown_paths))
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# Now walk the paths and sync the .git/ to .repo/projects/.
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# Now walk the paths and sync the .git/ to .repo/projects/.
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for name in platform_utils.listdir(dotgit):
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for name in platform_utils.listdir(dotgit):
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dotgit_path = os.path.join(dotgit, name)
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dotgit_path = os.path.join(dotgit, name)
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if name in KNOWN_LINKS:
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if platform_utils.islink(dotgit_path):
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# Ignore all temporary/backup names. These are common with vim & emacs.
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if name.endswith('~') or (name[0] == '#' and name[-1] == '#'):
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platform_utils.remove(dotgit_path)
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elif name in KNOWN_LINKS:
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platform_utils.remove(dotgit_path)
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platform_utils.remove(dotgit_path)
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else:
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raise GitError(f'{dotgit_path}: should be a symlink')
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else:
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else:
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gitdir_path = os.path.join(gitdir, name)
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gitdir_path = os.path.join(gitdir, name)
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if name in SAFE_TO_CLOBBER or not os.path.exists(gitdir_path):
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platform_utils.remove(gitdir_path, missing_ok=True)
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platform_utils.remove(gitdir_path, missing_ok=True)
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platform_utils.rename(dotgit_path, gitdir_path)
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platform_utils.rename(dotgit_path, gitdir_path)
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else:
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raise GitError(f'{dotgit_path}: unknown file; please file a bug')
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# Now that the dir should be empty, clear it out, and symlink it over.
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# Now that the dir should be empty, clear it out, and symlink it over.
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platform_utils.rmdir(dotgit)
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platform_utils.rmdir(dotgit)
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@ -347,6 +347,10 @@ class MigrateWorkTreeTests(unittest.TestCase):
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}
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}
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_FILES = {
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_FILES = {
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'COMMIT_EDITMSG', 'FETCH_HEAD', 'HEAD', 'index', 'ORIG_HEAD',
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'COMMIT_EDITMSG', 'FETCH_HEAD', 'HEAD', 'index', 'ORIG_HEAD',
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'unknown-file-should-be-migrated',
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}
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_CLEAN_FILES = {
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'a-vim-temp-file~', '#an-emacs-temp-file#',
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}
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}
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@classmethod
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@classmethod
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@ -365,10 +369,9 @@ class MigrateWorkTreeTests(unittest.TestCase):
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dotgit.mkdir(parents=True)
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dotgit.mkdir(parents=True)
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for name in cls._SYMLINKS:
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for name in cls._SYMLINKS:
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(dotgit / name).symlink_to(f'../../../.repo/projects/src/test.git/{name}')
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(dotgit / name).symlink_to(f'../../../.repo/projects/src/test.git/{name}')
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for name in cls._FILES:
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for name in cls._FILES | cls._CLEAN_FILES:
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(dotgit / name).write_text(name)
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(dotgit / name).write_text(name)
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subprocess.run(['tree', '-a', str(dotgit)])
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yield tempdir
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yield tempdir
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def test_standard(self):
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def test_standard(self):
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@ -385,3 +388,24 @@ class MigrateWorkTreeTests(unittest.TestCase):
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gitdir = tempdir / '.repo/projects/src/test.git'
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gitdir = tempdir / '.repo/projects/src/test.git'
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for name in self._FILES:
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for name in self._FILES:
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self.assertEqual(name, (gitdir / name).read_text())
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self.assertEqual(name, (gitdir / name).read_text())
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# Make sure files were removed.
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for name in self._CLEAN_FILES:
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self.assertFalse((gitdir / name).exists())
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def test_unknown(self):
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"""A checkout with unknown files should abort."""
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with self._simple_layout() as tempdir:
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dotgit = tempdir / 'src/test/.git'
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(tempdir / '.repo/projects/src/test.git/random-file').write_text('one')
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(dotgit / 'random-file').write_text('two')
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with self.assertRaises(error.GitError):
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project.Project._MigrateOldWorkTreeGitDir(str(dotgit))
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# Make sure no content was actually changed.
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self.assertTrue(dotgit.is_dir())
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for name in self._FILES:
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self.assertTrue((dotgit / name).is_file())
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for name in self._CLEAN_FILES:
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self.assertTrue((dotgit / name).is_file())
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for name in self._SYMLINKS:
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self.assertTrue((dotgit / name).is_symlink())
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