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Fix some mercurial edge cases
Summary: - Old versions of Mercurial give different output for `hg log -- ''` and `hg log`. Just use `hg log`. - Branch names with spaces can't be specified in `--rev`. I talked with hstuart in #mercurial and apparently am not crazy. Test Plan: - Viewed history of a repository. - Viewed history of a file. - Viewed branch `m m m m m 2:ffffffffffff (inactive)` - Learned that you checkout this branch with `hg checkout ':m m m m m 2:ffffffffffff (inactive)'` Reviewers: dschleimer, btrahan Reviewed By: dschleimer CC: aran Maniphest Tasks: T1268 Differential Revision: https://secure.phabricator.com/D2950
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2 changed files with 37 additions and 7 deletions
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@ -26,20 +26,36 @@ final class DiffusionMercurialHistoryQuery extends DiffusionHistoryQuery {
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$commit_hash = $drequest->getStableCommitName();
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$path = DiffusionPathIDQuery::normalizePath($path);
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$path = ltrim($path, '/');
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// NOTE: Using '' as a default path produces the correct behavior if HEAD
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// is a merge commit; using '.' does not (the merge commit is not included
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// in the log).
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$default_path = '';
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// NOTE: Older versions of Mercurial give different results for these
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// commands (see T1268):
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//
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// $ hg log -- ''
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// $ hg log
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//
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// All versions of Mercurial give different results for these commands
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// (merge commits are excluded with the "." version):
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//
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// $ hg log -- .
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// $ hg log
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//
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// If we don't have a path component in the query, omit it from the command
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// entirely to avoid these inconsistencies.
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$path_arg = '';
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if (strlen($path)) {
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$path_arg = csprintf('-- %s', $path);
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}
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// NOTE: --branch used to be called --only-branch; use -b for compatibility.
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list($stdout) = $repository->execxLocalCommand(
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'log --debug --template %s --limit %d -b %s --rev %s:0 -- %s',
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'log --debug --template %s --limit %d -b %s --rev %s:0 %C',
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'{node};{parents}\\n',
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($this->getOffset() + $this->getLimit()), // No '--skip' in Mercurial.
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$drequest->getBranch(),
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$commit_hash,
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nonempty(ltrim($path, '/'), $default_path));
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$path_arg);
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$lines = explode("\n", trim($stdout));
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$lines = array_slice($lines, $this->getOffset());
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@ -59,8 +59,22 @@ final class DiffusionMercurialRequest extends DiffusionRequest {
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if ($this->commit) {
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$this->stableCommitName = $this->commit;
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} else {
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// NOTE: For branches with spaces in their name like "a b", this
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// does not work properly:
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//
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// $ hg log --rev 'a b'
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//
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// We can use revsets instead:
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//
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// $ hg log --rev branch('a b')
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//
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// ...but they require a somewhat newer version of Mercurial. Instead,
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// use "-b" flag with limit 1 for greatest compatibility across
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// versions.
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list($this->stableCommitName) = $this->repository->execxLocalCommand(
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'log --template=%s --rev %s',
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'log --template=%s -b %s --limit 1',
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'{node}',
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$this->getBranch());
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}
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