git-svn: add support for --first-parent
When git-svn uses git-log to find embedded 'git-svn-id'-lines in commit messages, it can get confused when local history contains merges with other git-svn branches. But if --first-parent is supplied to git-log, working_head_info() will only see 'branch-local' commits and thus the first commit containing a 'git-svn-id' line should refer to the correct subversion branch. Signed-off-by: Lars Hjemli <hjemli@gmail.com> Acked-by: Eric Wong <normalperson@yhbt.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -317,6 +317,16 @@ This is only used with the 'dcommit' command.
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Print out the series of git arguments that would show
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which diffs would be committed to SVN.
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--first-parent::
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This is only used with the 'dcommit', 'rebase', 'log', 'find-rev' and
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'show-ignore' commands.
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These commands tries to detect the upstream subversion branch by means of
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the embedded 'git-svn-id' line in commit messages. When --first-parent is
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specified, git-svn only follows the first parent of each commit, effectively
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ignoring commits brought into the current branch through merge-operations.
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--
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ADVANCED OPTIONS
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17
git-svn.perl
17
git-svn.perl
@ -59,7 +59,7 @@ my ($_stdin, $_help, $_edit,
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$_template, $_shared,
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$_version, $_fetch_all, $_no_rebase,
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$_merge, $_strategy, $_dry_run, $_local,
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$_prefix, $_no_checkout, $_verbose);
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$_prefix, $_no_checkout, $_verbose, $_first_parent);
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$Git::SVN::_follow_parent = 1;
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my %remote_opts = ( 'username=s' => \$Git::SVN::Prompt::_username,
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'config-dir=s' => \$Git::SVN::Ra::config_dir,
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@ -119,12 +119,15 @@ my %cmd = (
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'dry-run|n' => \$_dry_run,
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'fetch-all|all' => \$_fetch_all,
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'no-rebase' => \$_no_rebase,
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'first-parent' => \$_first_parent,
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%cmt_opts, %fc_opts } ],
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'set-tree' => [ \&cmd_set_tree,
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"Set an SVN repository to a git tree-ish",
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{ 'stdin|' => \$_stdin, %cmt_opts, %fc_opts, } ],
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'show-ignore' => [ \&cmd_show_ignore, "Show svn:ignore listings",
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{ 'revision|r=i' => \$_revision } ],
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{ 'revision|r=i' => \$_revision,
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'first-parent' => \$_first_parent
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} ],
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'multi-fetch' => [ \&cmd_multi_fetch,
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"Deprecated alias for $0 fetch --all",
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{ 'revision|r=s' => \$_revision, %fc_opts } ],
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@ -145,15 +148,19 @@ my %cmd = (
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'authors-file|A=s' => \$_authors,
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'color' => \$Git::SVN::Log::color,
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'pager=s' => \$Git::SVN::Log::pager,
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'first-parent' => \$_first_parent
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} ],
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'find-rev' => [ \&cmd_find_rev, "Translate between SVN revision numbers and tree-ish",
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{ } ],
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{
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'first-parent' => \$_first_parent
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} ],
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'rebase' => [ \&cmd_rebase, "Fetch and rebase your working directory",
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{ 'merge|m|M' => \$_merge,
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'verbose|v' => \$_verbose,
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'strategy|s=s' => \$_strategy,
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'local|l' => \$_local,
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'fetch-all|all' => \$_fetch_all,
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'first-parent' => \$_first_parent,
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%fc_opts } ],
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'commit-diff' => [ \&cmd_commit_diff,
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'Commit a diff between two trees',
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@ -811,7 +818,9 @@ sub cmt_metadata {
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sub working_head_info {
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my ($head, $refs) = @_;
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my ($fh, $ctx) = command_output_pipe('log', '--no-color', $head);
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my @args = ('log', '--no-color');
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push @args, '--first-parent' if $_first_parent;
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my ($fh, $ctx) = command_output_pipe(@args, $head);
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my $hash;
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my %max;
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while (<$fh>) {
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