| #!/usr/bin/perl |
| # |
| # This tool is copyright (c) 2005, Martin Langhoff. |
| # It is released under the Gnu Public License, version 2. |
| # |
| # The basic idea is to walk the output of tla abrowse, |
| # fetch the changesets and apply them. |
| # |
| |
| =head1 Invocation |
| |
| git archimport [ -h ] [ -v ] [ -o ] [ -a ] [ -f ] [ -T ] |
| [ -D depth] [ -t tempdir ] <archive>/<branch> [ <archive>/<branch> ] |
| |
| Imports a project from one or more Arch repositories. It will follow branches |
| and repositories within the namespaces defined by the <archive/branch> |
| parameters supplied. If it cannot find the remote branch a merge comes from |
| it will just import it as a regular commit. If it can find it, it will mark it |
| as a merge whenever possible. |
| |
| See man (1) git-archimport for more details. |
| |
| =head1 TODO |
| |
| - create tag objects instead of ref tags |
| - audit shell-escaping of filenames |
| - hide our private tags somewhere smarter |
| - find a way to make "cat *patches | patch" safe even when patchfiles are missing newlines |
| - sort and apply patches by graphing ancestry relations instead of just |
| relying in dates supplied in the changeset itself. |
| tla ancestry-graph -m could be helpful here... |
| |
| =head1 Devel tricks |
| |
| Add print in front of the shell commands invoked via backticks. |
| |
| =head1 Devel Notes |
| |
| There are several places where Arch and git terminology are intermixed |
| and potentially confused. |
| |
| The notion of a "branch" in git is approximately equivalent to |
| a "archive/category--branch--version" in Arch. Also, it should be noted |
| that the "--branch" portion of "archive/category--branch--version" is really |
| optional in Arch although not many people (nor tools!) seem to know this. |
| This means that "archive/category--version" is also a valid "branch" |
| in git terms. |
| |
| We always refer to Arch names by their fully qualified variant (which |
| means the "archive" name is prefixed. |
| |
| For people unfamiliar with Arch, an "archive" is the term for "repository", |
| and can contain multiple, unrelated branches. |
| |
| =cut |
| |
| use 5.008; |
| use strict; |
| use warnings; |
| use Getopt::Std; |
| use File::Temp qw(tempdir); |
| use File::Path qw(mkpath rmtree); |
| use File::Basename qw(basename dirname); |
| use Data::Dumper qw/ Dumper /; |
| use IPC::Open2; |
| |
| $SIG{'PIPE'}="IGNORE"; |
| $ENV{'TZ'}="UTC"; |
| |
| my $git_dir = $ENV{"GIT_DIR"} || ".git"; |
| $ENV{"GIT_DIR"} = $git_dir; |
| my $ptag_dir = "$git_dir/archimport/tags"; |
| |
| our($opt_h,$opt_f,$opt_v,$opt_T,$opt_t,$opt_D,$opt_a,$opt_o); |
| |
| sub usage() { |
| print STDERR <<END; |
| usage: git archimport # fetch/update GIT from Arch |
| [ -h ] [ -v ] [ -o ] [ -a ] [ -f ] [ -T ] [ -D depth ] [ -t tempdir ] |
| repository/arch-branch [ repository/arch-branch] ... |
| END |
| exit(1); |
| } |
| |
| getopts("fThvat:D:") or usage(); |
| usage if $opt_h; |
| |
| @ARGV >= 1 or usage(); |
| # $arch_branches: |
| # values associated with keys: |
| # =1 - Arch version / git 'branch' detected via abrowse on a limit |
| # >1 - Arch version / git 'branch' of an auxiliary branch we've merged |
| my %arch_branches = map { my $branch = $_; $branch =~ s/:[^:]*$//; $branch => 1 } @ARGV; |
| |
| # $branch_name_map: |
| # maps arch branches to git branch names |
| my %branch_name_map = map { m/^(.*):([^:]*)$/; $1 => $2 } grep { m/:/ } @ARGV; |
| |
| $ENV{'TMPDIR'} = $opt_t if $opt_t; # $ENV{TMPDIR} will affect tempdir() calls: |
| my $tmp = tempdir('git-archimport-XXXXXX', TMPDIR => 1, CLEANUP => 1); |
| $opt_v && print "+ Using $tmp as temporary directory\n"; |
| |
| unless (-d $git_dir) { # initial import needs empty directory |
| opendir DIR, '.' or die "Unable to open current directory: $!\n"; |
| while (my $entry = readdir DIR) { |
| $entry =~ /^\.\.?$/ or |
| die "Initial import needs an empty current working directory.\n" |
| } |
| closedir DIR |
| } |
| |
| my $default_archive; # default Arch archive |
| my %reachable = (); # Arch repositories we can access |
| my %unreachable = (); # Arch repositories we can't access :< |
| my @psets = (); # the collection |
| my %psets = (); # the collection, by name |
| my %stats = ( # Track which strategy we used to import: |
| get_tag => 0, replay => 0, get_new => 0, get_delta => 0, |
| simple_changeset => 0, import_or_tag => 0 |
| ); |
| |
| my %rptags = (); # my reverse private tags |
| # to map a SHA1 to a commitid |
| my $TLA = $ENV{'ARCH_CLIENT'} || 'tla'; |
| |
| sub do_abrowse { |
| my $stage = shift; |
| while (my ($limit, $level) = each %arch_branches) { |
| next unless $level == $stage; |
| |
| open ABROWSE, "$TLA abrowse -fkD --merges $limit |" |
| or die "Problems with tla abrowse: $!"; |
| |
| my %ps = (); # the current one |
| my $lastseen = ''; |
| |
| while (<ABROWSE>) { |
| chomp; |
| |
| # first record padded w 8 spaces |
| if (s/^\s{8}\b//) { |
| my ($id, $type) = split(m/\s+/, $_, 2); |
| |
| my %last_ps; |
| # store the record we just captured |
| if (%ps && !exists $psets{ $ps{id} }) { |
| %last_ps = %ps; # break references |
| push (@psets, \%last_ps); |
| $psets{ $last_ps{id} } = \%last_ps; |
| } |
| |
| my $branch = extract_versionname($id); |
| %ps = ( id => $id, branch => $branch ); |
| if (%last_ps && ($last_ps{branch} eq $branch)) { |
| $ps{parent_id} = $last_ps{id}; |
| } |
| |
| $arch_branches{$branch} = 1; |
| $lastseen = 'id'; |
| |
| # deal with types (should work with baz or tla): |
| if ($type =~ m/\(.*changeset\)/) { |
| $ps{type} = 's'; |
| } elsif ($type =~ /\(.*import\)/) { |
| $ps{type} = 'i'; |
| } elsif ($type =~ m/\(tag.*?(\S+\@\S+).*?\)/) { |
| $ps{type} = 't'; |
| # read which revision we've tagged when we parse the log |
| $ps{tag} = $1; |
| } else { |
| warn "Unknown type $type"; |
| } |
| |
| $arch_branches{$branch} = 1; |
| $lastseen = 'id'; |
| } elsif (s/^\s{10}//) { |
| # 10 leading spaces or more |
| # indicate commit metadata |
| |
| # date |
| if ($lastseen eq 'id' && m/^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d)/){ |
| $ps{date} = $1; |
| $lastseen = 'date'; |
| } elsif ($_ eq 'merges in:') { |
| $ps{merges} = []; |
| $lastseen = 'merges'; |
| } elsif ($lastseen eq 'merges' && s/^\s{2}//) { |
| my $id = $_; |
| push (@{$ps{merges}}, $id); |
| |
| # aggressive branch finding: |
| if ($opt_D) { |
| my $branch = extract_versionname($id); |
| my $repo = extract_reponame($branch); |
| |
| if (archive_reachable($repo) && |
| !defined $arch_branches{$branch}) { |
| $arch_branches{$branch} = $stage + 1; |
| } |
| } |
| } else { |
| warn "more metadata after merges!?: $_\n" unless /^\s*$/; |
| } |
| } |
| } |
| |
| if (%ps && !exists $psets{ $ps{id} }) { |
| my %temp = %ps; # break references |
| if (@psets && $psets[$#psets]{branch} eq $ps{branch}) { |
| $temp{parent_id} = $psets[$#psets]{id}; |
| } |
| push (@psets, \%temp); |
| $psets{ $temp{id} } = \%temp; |
| } |
| |
| close ABROWSE or die "$TLA abrowse failed on $limit\n"; |
| } |
| } # end foreach $root |
| |
| do_abrowse(1); |
| my $depth = 2; |
| $opt_D ||= 0; |
| while ($depth <= $opt_D) { |
| do_abrowse($depth); |
| $depth++; |
| } |
| |
| ## Order patches by time |
| # FIXME see if we can find a more optimal way to do this by graphing |
| # the ancestry data and walking it, that way we won't have to rely on |
| # client-supplied dates |
| @psets = sort {$a->{date}.$b->{id} cmp $b->{date}.$b->{id}} @psets; |
| |
| #print Dumper \@psets; |
| |
| ## |
| ## TODO cleanup irrelevant patches |
| ## and put an initial import |
| ## or a full tag |
| my $import = 0; |
| unless (-d $git_dir) { # initial import |
| if ($psets[0]{type} eq 'i' || $psets[0]{type} eq 't') { |
| print "Starting import from $psets[0]{id}\n"; |
| `git-init`; |
| die $! if $?; |
| $import = 1; |
| } else { |
| die "Need to start from an import or a tag -- cannot use $psets[0]{id}"; |
| } |
| } else { # progressing an import |
| # load the rptags |
| opendir(DIR, $ptag_dir) |
| || die "can't opendir: $!"; |
| while (my $file = readdir(DIR)) { |
| # skip non-interesting-files |
| next unless -f "$ptag_dir/$file"; |
| |
| # convert first '--' to '/' from old git-archimport to use |
| # as an archivename/c--b--v private tag |
| if ($file !~ m!,!) { |
| my $oldfile = $file; |
| $file =~ s!--!,!; |
| print STDERR "converting old tag $oldfile to $file\n"; |
| rename("$ptag_dir/$oldfile", "$ptag_dir/$file") or die $!; |
| } |
| my $sha = ptag($file); |
| chomp $sha; |
| $rptags{$sha} = $file; |
| } |
| closedir DIR; |
| } |
| |
| # process patchsets |
| # extract the Arch repository name (Arch "archive" in Arch-speak) |
| sub extract_reponame { |
| my $fq_cvbr = shift; # archivename/[[[[category]branch]version]revision] |
| return (split(/\//, $fq_cvbr))[0]; |
| } |
| |
| sub extract_versionname { |
| my $name = shift; |
| $name =~ s/--(?:patch|version(?:fix)?|base)-\d+$//; |
| return $name; |
| } |
| |
| # convert a fully-qualified revision or version to a unique dirname: |
| # normalperson@yhbt.net-05/mpd--uclinux--1--patch-2 |
| # becomes: normalperson@yhbt.net-05,mpd--uclinux--1 |
| # |
| # the git notion of a branch is closer to |
| # archive/category--branch--version than archive/category--branch, so we |
| # use this to convert to git branch names. |
| # Also, keep archive names but replace '/' with ',' since it won't require |
| # subdirectories, and is safer than swapping '--' which could confuse |
| # reverse-mapping when dealing with bastard branches that |
| # are just archive/category--version (no --branch) |
| sub tree_dirname { |
| my $revision = shift; |
| my $name = extract_versionname($revision); |
| $name =~ s#/#,#; |
| return $name; |
| } |
| |
| # old versions of git-archimport just use the <category--branch> part: |
| sub old_style_branchname { |
| my $id = shift; |
| my $ret = safe_pipe_capture($TLA,'parse-package-name','-p',$id); |
| chomp $ret; |
| return $ret; |
| } |
| |
| *git_default_branchname = $opt_o ? *old_style_branchname : *tree_dirname; |
| |
| # retrieve default archive, since $branch_name_map keys might not include it |
| sub get_default_archive { |
| if (!defined $default_archive) { |
| $default_archive = safe_pipe_capture($TLA,'my-default-archive'); |
| chomp $default_archive; |
| } |
| return $default_archive; |
| } |
| |
| sub git_branchname { |
| my $revision = shift; |
| my $name = extract_versionname($revision); |
| |
| if (exists $branch_name_map{$name}) { |
| return $branch_name_map{$name}; |
| |
| } elsif ($name =~ m#^([^/]*)/(.*)$# |
| && $1 eq get_default_archive() |
| && exists $branch_name_map{$2}) { |
| # the names given in the command-line lacked the archive. |
| return $branch_name_map{$2}; |
| |
| } else { |
| return git_default_branchname($revision); |
| } |
| } |
| |
| sub process_patchset_accurate { |
| my $ps = shift; |
| |
| # switch to that branch if we're not already in that branch: |
| if (-e "$git_dir/refs/heads/$ps->{branch}") { |
| system('git-checkout','-f',$ps->{branch}) == 0 or die "$! $?\n"; |
| |
| # remove any old stuff that got leftover: |
| my $rm = safe_pipe_capture('git-ls-files','--others','-z'); |
| rmtree(split(/\0/,$rm)) if $rm; |
| } |
| |
| # Apply the import/changeset/merge into the working tree |
| my $dir = sync_to_ps($ps); |
| # read the new log entry: |
| my @commitlog = safe_pipe_capture($TLA,'cat-log','-d',$dir,$ps->{id}); |
| die "Error in cat-log: $!" if $?; |
| chomp @commitlog; |
| |
| # grab variables we want from the log, new fields get added to $ps: |
| # (author, date, email, summary, message body ...) |
| parselog($ps, \@commitlog); |
| |
| if ($ps->{id} =~ /--base-0$/ && $ps->{id} ne $psets[0]{id}) { |
| # this should work when importing continuations |
| if ($ps->{tag} && (my $branchpoint = eval { ptag($ps->{tag}) })) { |
| |
| # find where we are supposed to branch from |
| if (! -e "$git_dir/refs/heads/$ps->{branch}") { |
| system('git-branch',$ps->{branch},$branchpoint) == 0 or die "$! $?\n"; |
| |
| # We trust Arch with the fact that this is just a tag, |
| # and it does not affect the state of the tree, so |
| # we just tag and move on. If the user really wants us |
| # to consolidate more branches into one, don't tag because |
| # the tag name would be already taken. |
| tag($ps->{id}, $branchpoint); |
| ptag($ps->{id}, $branchpoint); |
| print " * Tagged $ps->{id} at $branchpoint\n"; |
| } |
| system('git-checkout','-f',$ps->{branch}) == 0 or die "$! $?\n"; |
| |
| # remove any old stuff that got leftover: |
| my $rm = safe_pipe_capture('git-ls-files','--others','-z'); |
| rmtree(split(/\0/,$rm)) if $rm; |
| return 0; |
| } else { |
| warn "Tagging from unknown id unsupported\n" if $ps->{tag}; |
| } |
| # allow multiple bases/imports here since Arch supports cherry-picks |
| # from unrelated trees |
| } |
| |
| # update the index with all the changes we got |
| system('git-diff-files --name-only -z | '. |
| 'git-update-index --remove -z --stdin') == 0 or die "$! $?\n"; |
| system('git-ls-files --others -z | '. |
| 'git-update-index --add -z --stdin') == 0 or die "$! $?\n"; |
| return 1; |
| } |
| |
| # the native changeset processing strategy. This is very fast, but |
| # does not handle permissions or any renames involving directories |
| sub process_patchset_fast { |
| my $ps = shift; |
| # |
| # create the branch if needed |
| # |
| if ($ps->{type} eq 'i' && !$import) { |
| die "Should not have more than one 'Initial import' per GIT import: $ps->{id}"; |
| } |
| |
| unless ($import) { # skip for import |
| if ( -e "$git_dir/refs/heads/$ps->{branch}") { |
| # we know about this branch |
| system('git-checkout',$ps->{branch}); |
| } else { |
| # new branch! we need to verify a few things |
| die "Branch on a non-tag!" unless $ps->{type} eq 't'; |
| my $branchpoint = ptag($ps->{tag}); |
| die "Tagging from unknown id unsupported: $ps->{tag}" |
| unless $branchpoint; |
| |
| # find where we are supposed to branch from |
| if (! -e "$git_dir/refs/heads/$ps->{branch}") { |
| system('git-branch',$ps->{branch},$branchpoint) == 0 or die "$! $?\n"; |
| |
| # We trust Arch with the fact that this is just a tag, |
| # and it does not affect the state of the tree, so |
| # we just tag and move on. If the user really wants us |
| # to consolidate more branches into one, don't tag because |
| # the tag name would be already taken. |
| tag($ps->{id}, $branchpoint); |
| ptag($ps->{id}, $branchpoint); |
| print " * Tagged $ps->{id} at $branchpoint\n"; |
| } |
| system('git-checkout',$ps->{branch}) == 0 or die "$! $?\n"; |
| return 0; |
| } |
| die $! if $?; |
| } |
| |
| # |
| # Apply the import/changeset/merge into the working tree |
| # |
| if ($ps->{type} eq 'i' || $ps->{type} eq 't') { |
| apply_import($ps) or die $!; |
| $stats{import_or_tag}++; |
| $import=0; |
| } elsif ($ps->{type} eq 's') { |
| apply_cset($ps); |
| $stats{simple_changeset}++; |
| } |
| |
| # |
| # prepare update git's index, based on what arch knows |
| # about the pset, resolve parents, etc |
| # |
| |
| my @commitlog = safe_pipe_capture($TLA,'cat-archive-log',$ps->{id}); |
| die "Error in cat-archive-log: $!" if $?; |
| |
| parselog($ps,\@commitlog); |
| |
| # imports don't give us good info |
| # on added files. Shame on them |
| if ($ps->{type} eq 'i' || $ps->{type} eq 't') { |
| system('git-ls-files --deleted -z | '. |
| 'git-update-index --remove -z --stdin') == 0 or die "$! $?\n"; |
| system('git-ls-files --others -z | '. |
| 'git-update-index --add -z --stdin') == 0 or die "$! $?\n"; |
| } |
| |
| # TODO: handle removed_directories and renamed_directories: |
| |
| if (my $del = $ps->{removed_files}) { |
| unlink @$del; |
| while (@$del) { |
| my @slice = splice(@$del, 0, 100); |
| system('git-update-index','--remove','--',@slice) == 0 or |
| die "Error in git-update-index --remove: $! $?\n"; |
| } |
| } |
| |
| if (my $ren = $ps->{renamed_files}) { # renamed |
| if (@$ren % 2) { |
| die "Odd number of entries in rename!?"; |
| } |
| |
| while (@$ren) { |
| my $from = shift @$ren; |
| my $to = shift @$ren; |
| |
| unless (-d dirname($to)) { |
| mkpath(dirname($to)); # will die on err |
| } |
| # print "moving $from $to"; |
| rename($from, $to) or die "Error renaming '$from' '$to': $!\n"; |
| system('git-update-index','--remove','--',$from) == 0 or |
| die "Error in git-update-index --remove: $! $?\n"; |
| system('git-update-index','--add','--',$to) == 0 or |
| die "Error in git-update-index --add: $! $?\n"; |
| } |
| } |
| |
| if (my $add = $ps->{new_files}) { |
| while (@$add) { |
| my @slice = splice(@$add, 0, 100); |
| system('git-update-index','--add','--',@slice) == 0 or |
| die "Error in git-update-index --add: $! $?\n"; |
| } |
| } |
| |
| if (my $mod = $ps->{modified_files}) { |
| while (@$mod) { |
| my @slice = splice(@$mod, 0, 100); |
| system('git-update-index','--',@slice) == 0 or |
| die "Error in git-update-index: $! $?\n"; |
| } |
| } |
| return 1; # we successfully applied the changeset |
| } |
| |
| if ($opt_f) { |
| print "Will import patchsets using the fast strategy\n", |
| "Renamed directories and permission changes will be missed\n"; |
| *process_patchset = *process_patchset_fast; |
| } else { |
| print "Using the default (accurate) import strategy.\n", |
| "Things may be a bit slow\n"; |
| *process_patchset = *process_patchset_accurate; |
| } |
| |
| foreach my $ps (@psets) { |
| # process patchsets |
| $ps->{branch} = git_branchname($ps->{id}); |
| |
| # |
| # ensure we have a clean state |
| # |
| if (my $dirty = `git-diff-files`) { |
| die "Unclean tree when about to process $ps->{id} " . |
| " - did we fail to commit cleanly before?\n$dirty"; |
| } |
| die $! if $?; |
| |
| # |
| # skip commits already in repo |
| # |
| if (ptag($ps->{id})) { |
| $opt_v && print " * Skipping already imported: $ps->{id}\n"; |
| next; |
| } |
| |
| print " * Starting to work on $ps->{id}\n"; |
| |
| process_patchset($ps) or next; |
| |
| # warn "errors when running git-update-index! $!"; |
| my $tree = `git-write-tree`; |
| die "cannot write tree $!" if $?; |
| chomp $tree; |
| |
| # |
| # Who's your daddy? |
| # |
| my @par; |
| if ( -e "$git_dir/refs/heads/$ps->{branch}") { |
| if (open HEAD, "<","$git_dir/refs/heads/$ps->{branch}") { |
| my $p = <HEAD>; |
| close HEAD; |
| chomp $p; |
| push @par, '-p', $p; |
| } else { |
| if ($ps->{type} eq 's') { |
| warn "Could not find the right head for the branch $ps->{branch}"; |
| } |
| } |
| } |
| |
| if ($ps->{merges}) { |
| push @par, find_parents($ps); |
| } |
| |
| # |
| # Commit, tag and clean state |
| # |
| $ENV{TZ} = 'GMT'; |
| $ENV{GIT_AUTHOR_NAME} = $ps->{author}; |
| $ENV{GIT_AUTHOR_EMAIL} = $ps->{email}; |
| $ENV{GIT_AUTHOR_DATE} = $ps->{date}; |
| $ENV{GIT_COMMITTER_NAME} = $ps->{author}; |
| $ENV{GIT_COMMITTER_EMAIL} = $ps->{email}; |
| $ENV{GIT_COMMITTER_DATE} = $ps->{date}; |
| |
| my $pid = open2(*READER, *WRITER,'git-commit-tree',$tree,@par) |
| or die $!; |
| print WRITER $ps->{summary},"\n\n"; |
| |
| # only print message if it's not empty, to avoid a spurious blank line; |
| # also append an extra newline, so there's a blank line before the |
| # following "git-archimport-id:" line. |
| print WRITER $ps->{message},"\n\n" if ($ps->{message} ne ""); |
| |
| # make it easy to backtrack and figure out which Arch revision this was: |
| print WRITER 'git-archimport-id: ',$ps->{id},"\n"; |
| |
| close WRITER; |
| my $commitid = <READER>; # read |
| chomp $commitid; |
| close READER; |
| waitpid $pid,0; # close; |
| |
| if (length $commitid != 40) { |
| die "Something went wrong with the commit! $! $commitid"; |
| } |
| # |
| # Update the branch |
| # |
| open HEAD, ">","$git_dir/refs/heads/$ps->{branch}"; |
| print HEAD $commitid; |
| close HEAD; |
| system('git-update-ref', 'HEAD', "$ps->{branch}"); |
| |
| # tag accordingly |
| ptag($ps->{id}, $commitid); # private tag |
| if ($opt_T || $ps->{type} eq 't' || $ps->{type} eq 'i') { |
| tag($ps->{id}, $commitid); |
| } |
| print " * Committed $ps->{id}\n"; |
| print " + tree $tree\n"; |
| print " + commit $commitid\n"; |
| $opt_v && print " + commit date is $ps->{date} \n"; |
| $opt_v && print " + parents: ",join(' ',@par),"\n"; |
| } |
| |
| if ($opt_v) { |
| foreach (sort keys %stats) { |
| print" $_: $stats{$_}\n"; |
| } |
| } |
| exit 0; |
| |
| # used by the accurate strategy: |
| sub sync_to_ps { |
| my $ps = shift; |
| my $tree_dir = $tmp.'/'.tree_dirname($ps->{id}); |
| |
| $opt_v && print "sync_to_ps($ps->{id}) method: "; |
| |
| if (-d $tree_dir) { |
| if ($ps->{type} eq 't') { |
| $opt_v && print "get (tag)\n"; |
| # looks like a tag-only or (worse,) a mixed tags/changeset branch, |
| # can't rely on replay to work correctly on these |
| rmtree($tree_dir); |
| safe_pipe_capture($TLA,'get','--no-pristine',$ps->{id},$tree_dir); |
| $stats{get_tag}++; |
| } else { |
| my $tree_id = arch_tree_id($tree_dir); |
| if ($ps->{parent_id} && ($ps->{parent_id} eq $tree_id)) { |
| # the common case (hopefully) |
| $opt_v && print "replay\n"; |
| safe_pipe_capture($TLA,'replay','-d',$tree_dir,$ps->{id}); |
| $stats{replay}++; |
| } else { |
| # getting one tree is usually faster than getting two trees |
| # and applying the delta ... |
| rmtree($tree_dir); |
| $opt_v && print "apply-delta\n"; |
| safe_pipe_capture($TLA,'get','--no-pristine', |
| $ps->{id},$tree_dir); |
| $stats{get_delta}++; |
| } |
| } |
| } else { |
| # new branch work |
| $opt_v && print "get (new tree)\n"; |
| safe_pipe_capture($TLA,'get','--no-pristine',$ps->{id},$tree_dir); |
| $stats{get_new}++; |
| } |
| |
| # added -I flag to rsync since we're going to fast! AIEEEEE!!!! |
| system('rsync','-aI','--delete','--exclude',$git_dir, |
| # '--exclude','.arch-inventory', |
| '--exclude','.arch-ids','--exclude','{arch}', |
| '--exclude','+*','--exclude',',*', |
| "$tree_dir/",'./') == 0 or die "Cannot rsync $tree_dir: $! $?"; |
| return $tree_dir; |
| } |
| |
| sub apply_import { |
| my $ps = shift; |
| my $bname = git_branchname($ps->{id}); |
| |
| mkpath($tmp); |
| |
| safe_pipe_capture($TLA,'get','-s','--no-pristine',$ps->{id},"$tmp/import"); |
| die "Cannot get import: $!" if $?; |
| system('rsync','-aI','--delete', '--exclude',$git_dir, |
| '--exclude','.arch-ids','--exclude','{arch}', |
| "$tmp/import/", './'); |
| die "Cannot rsync import:$!" if $?; |
| |
| rmtree("$tmp/import"); |
| die "Cannot remove tempdir: $!" if $?; |
| |
| |
| return 1; |
| } |
| |
| sub apply_cset { |
| my $ps = shift; |
| |
| mkpath($tmp); |
| |
| # get the changeset |
| safe_pipe_capture($TLA,'get-changeset',$ps->{id},"$tmp/changeset"); |
| die "Cannot get changeset: $!" if $?; |
| |
| # apply patches |
| if (`find $tmp/changeset/patches -type f -name '*.patch'`) { |
| # this can be sped up considerably by doing |
| # (find | xargs cat) | patch |
| # but that can get mucked up by patches |
| # with missing trailing newlines or the standard |
| # 'missing newline' flag in the patch - possibly |
| # produced with an old/buggy diff. |
| # slow and safe, we invoke patch once per patchfile |
| `find $tmp/changeset/patches -type f -name '*.patch' -print0 | grep -zv '{arch}' | xargs -iFILE -0 --no-run-if-empty patch -p1 --forward -iFILE`; |
| die "Problem applying patches! $!" if $?; |
| } |
| |
| # apply changed binary files |
| if (my @modified = `find $tmp/changeset/patches -type f -name '*.modified'`) { |
| foreach my $mod (@modified) { |
| chomp $mod; |
| my $orig = $mod; |
| $orig =~ s/\.modified$//; # lazy |
| $orig =~ s!^\Q$tmp\E/changeset/patches/!!; |
| #print "rsync -p '$mod' '$orig'"; |
| system('rsync','-p',$mod,"./$orig"); |
| die "Problem applying binary changes! $!" if $?; |
| } |
| } |
| |
| # bring in new files |
| system('rsync','-aI','--exclude',$git_dir, |
| '--exclude','.arch-ids', |
| '--exclude', '{arch}', |
| "$tmp/changeset/new-files-archive/",'./'); |
| |
| # deleted files are hinted from the commitlog processing |
| |
| rmtree("$tmp/changeset"); |
| } |
| |
| |
| # =for reference |
| # notes: *-files/-directories keys cannot have spaces, they're always |
| # pika-escaped. Everything after the first newline |
| # A log entry looks like: |
| # Revision: moodle-org--moodle--1.3.3--patch-15 |
| # Archive: arch-eduforge@catalyst.net.nz--2004 |
| # Creator: Penny Leach <penny@catalyst.net.nz> |
| # Date: Wed May 25 14:15:34 NZST 2005 |
| # Standard-date: 2005-05-25 02:15:34 GMT |
| # New-files: lang/de/.arch-ids/block_glossary_random.php.id |
| # lang/de/.arch-ids/block_html.php.id |
| # New-directories: lang/de/help/questionnaire |
| # lang/de/help/questionnaire/.arch-ids |
| # Renamed-files: .arch-ids/db_sears.sql.id db/.arch-ids/db_sears.sql.id |
| # db_sears.sql db/db_sears.sql |
| # Removed-files: lang/be/docs/.arch-ids/release.html.id |
| # lang/be/docs/.arch-ids/releaseold.html.id |
| # Modified-files: admin/cron.php admin/delete.php |
| # admin/editor.html backup/lib.php backup/restore.php |
| # New-patches: arch-eduforge@catalyst.net.nz--2004/moodle-org--moodle--1.3.3--patch-15 |
| # Summary: Updating to latest from MOODLE_14_STABLE (1.4.5+) |
| # summary can be multiline with a leading space just like the above fields |
| # Keywords: |
| # |
| # Updating yadda tadda tadda madda |
| sub parselog { |
| my ($ps, $log) = @_; |
| my $key = undef; |
| |
| # headers we want that contain filenames: |
| my %want_headers = ( |
| new_files => 1, |
| modified_files => 1, |
| renamed_files => 1, |
| renamed_directories => 1, |
| removed_files => 1, |
| removed_directories => 1, |
| ); |
| |
| chomp (@$log); |
| while ($_ = shift @$log) { |
| if (/^Continuation-of:\s*(.*)/) { |
| $ps->{tag} = $1; |
| $key = undef; |
| } elsif (/^Summary:\s*(.*)$/ ) { |
| # summary can be multiline as long as it has a leading space. |
| # we squeeze it onto a single line, though. |
| $ps->{summary} = [ $1 ]; |
| $key = 'summary'; |
| } elsif (/^Creator: (.*)\s*<([^\>]+)>/) { |
| $ps->{author} = $1; |
| $ps->{email} = $2; |
| $key = undef; |
| # any *-files or *-directories can be read here: |
| } elsif (/^([A-Z][a-z\-]+):\s*(.*)$/) { |
| my $val = $2; |
| $key = lc $1; |
| $key =~ tr/-/_/; # too lazy to quote :P |
| if ($want_headers{$key}) { |
| push @{$ps->{$key}}, split(/\s+/, $val); |
| } else { |
| $key = undef; |
| } |
| } elsif (/^$/) { |
| last; # remainder of @$log that didn't get shifted off is message |
| } elsif ($key) { |
| if (/^\s+(.*)$/) { |
| if ($key eq 'summary') { |
| push @{$ps->{$key}}, $1; |
| } else { # files/directories: |
| push @{$ps->{$key}}, split(/\s+/, $1); |
| } |
| } else { |
| $key = undef; |
| } |
| } |
| } |
| |
| # drop leading empty lines from the log message |
| while (@$log && $log->[0] eq '') { |
| shift @$log; |
| } |
| if (exists $ps->{summary} && @{$ps->{summary}}) { |
| $ps->{summary} = join(' ', @{$ps->{summary}}); |
| } |
| elsif (@$log == 0) { |
| $ps->{summary} = 'empty commit message'; |
| } else { |
| $ps->{summary} = $log->[0] . '...'; |
| } |
| $ps->{message} = join("\n",@$log); |
| |
| # skip Arch control files, unescape pika-escaped files |
| foreach my $k (keys %want_headers) { |
| next unless (defined $ps->{$k}); |
| my @tmp = (); |
| foreach my $t (@{$ps->{$k}}) { |
| next unless length ($t); |
| next if $t =~ m!\{arch\}/!; |
| next if $t =~ m!\.arch-ids/!; |
| # should we skip this? |
| next if $t =~ m!\.arch-inventory$!; |
| # tla cat-archive-log will give us filenames with spaces as file\(sp)name - why? |
| # we can assume that any filename with \ indicates some pika escaping that we want to get rid of. |
| if ($t =~ /\\/ ){ |
| $t = (safe_pipe_capture($TLA,'escape','--unescaped',$t))[0]; |
| } |
| push @tmp, $t; |
| } |
| $ps->{$k} = \@tmp; |
| } |
| } |
| |
| # write/read a tag |
| sub tag { |
| my ($tag, $commit) = @_; |
| |
| if ($opt_o) { |
| $tag =~ s|/|--|g; |
| } else { |
| my $patchname = $tag; |
| $patchname =~ s/.*--//; |
| $tag = git_branchname ($tag) . '--' . $patchname; |
| } |
| |
| if ($commit) { |
| open(C,">","$git_dir/refs/tags/$tag") |
| or die "Cannot create tag $tag: $!\n"; |
| print C "$commit\n" |
| or die "Cannot write tag $tag: $!\n"; |
| close(C) |
| or die "Cannot write tag $tag: $!\n"; |
| print " * Created tag '$tag' on '$commit'\n" if $opt_v; |
| } else { # read |
| open(C,"<","$git_dir/refs/tags/$tag") |
| or die "Cannot read tag $tag: $!\n"; |
| $commit = <C>; |
| chomp $commit; |
| die "Error reading tag $tag: $!\n" unless length $commit == 40; |
| close(C) |
| or die "Cannot read tag $tag: $!\n"; |
| return $commit; |
| } |
| } |
| |
| # write/read a private tag |
| # reads fail softly if the tag isn't there |
| sub ptag { |
| my ($tag, $commit) = @_; |
| |
| # don't use subdirs for tags yet, it could screw up other porcelains |
| $tag =~ s|/|,|g; |
| |
| my $tag_file = "$ptag_dir/$tag"; |
| my $tag_branch_dir = dirname($tag_file); |
| mkpath($tag_branch_dir) unless (-d $tag_branch_dir); |
| |
| if ($commit) { # write |
| open(C,">",$tag_file) |
| or die "Cannot create tag $tag: $!\n"; |
| print C "$commit\n" |
| or die "Cannot write tag $tag: $!\n"; |
| close(C) |
| or die "Cannot write tag $tag: $!\n"; |
| $rptags{$commit} = $tag |
| unless $tag =~ m/--base-0$/; |
| } else { # read |
| # if the tag isn't there, return 0 |
| unless ( -s $tag_file) { |
| return 0; |
| } |
| open(C,"<",$tag_file) |
| or die "Cannot read tag $tag: $!\n"; |
| $commit = <C>; |
| chomp $commit; |
| die "Error reading tag $tag: $!\n" unless length $commit == 40; |
| close(C) |
| or die "Cannot read tag $tag: $!\n"; |
| unless (defined $rptags{$commit}) { |
| $rptags{$commit} = $tag; |
| } |
| return $commit; |
| } |
| } |
| |
| sub find_parents { |
| # |
| # Identify what branches are merging into me |
| # and whether we are fully merged |
| # git-merge-base <headsha> <headsha> should tell |
| # me what the base of the merge should be |
| # |
| my $ps = shift; |
| |
| my %branches; # holds an arrayref per branch |
| # the arrayref contains a list of |
| # merged patches between the base |
| # of the merge and the current head |
| |
| my @parents; # parents found for this commit |
| |
| # simple loop to split the merges |
| # per branch |
| foreach my $merge (@{$ps->{merges}}) { |
| my $branch = git_branchname($merge); |
| unless (defined $branches{$branch} ){ |
| $branches{$branch} = []; |
| } |
| push @{$branches{$branch}}, $merge; |
| } |
| |
| # |
| # foreach branch find a merge base and walk it to the |
| # head where we are, collecting the merged patchsets that |
| # Arch has recorded. Keep that in @have |
| # Compare that with the commits on the other branch |
| # between merge-base and the tip of the branch (@need) |
| # and see if we have a series of consecutive patches |
| # starting from the merge base. The tip of the series |
| # of consecutive patches merged is our new parent for |
| # that branch. |
| # |
| foreach my $branch (keys %branches) { |
| |
| # check that we actually know about the branch |
| next unless -e "$git_dir/refs/heads/$branch"; |
| |
| my $mergebase = safe_pipe_capture(qw(git-merge-base), $branch, $ps->{branch}); |
| if ($?) { |
| # Don't die here, Arch supports one-way cherry-picking |
| # between branches with no common base (or any relationship |
| # at all beforehand) |
| warn "Cannot find merge base for $branch and $ps->{branch}"; |
| next; |
| } |
| chomp $mergebase; |
| |
| # now walk up to the mergepoint collecting what patches we have |
| my $branchtip = git_rev_parse($ps->{branch}); |
| my @ancestors = `git-rev-list --topo-order $branchtip ^$mergebase`; |
| my %have; # collected merges this branch has |
| foreach my $merge (@{$ps->{merges}}) { |
| $have{$merge} = 1; |
| } |
| my %ancestorshave; |
| foreach my $par (@ancestors) { |
| $par = commitid2pset($par); |
| if (defined $par->{merges}) { |
| foreach my $merge (@{$par->{merges}}) { |
| $ancestorshave{$merge}=1; |
| } |
| } |
| } |
| # print "++++ Merges in $ps->{id} are....\n"; |
| # my @have = sort keys %have; print Dumper(\@have); |
| |
| # merge what we have with what ancestors have |
| %have = (%have, %ancestorshave); |
| |
| # see what the remote branch has - these are the merges we |
| # will want to have in a consecutive series from the mergebase |
| my $otherbranchtip = git_rev_parse($branch); |
| my @needraw = `git-rev-list --topo-order $otherbranchtip ^$mergebase`; |
| my @need; |
| foreach my $needps (@needraw) { # get the psets |
| $needps = commitid2pset($needps); |
| # git-rev-list will also |
| # list commits merged in via earlier |
| # merges. we are only interested in commits |
| # from the branch we're looking at |
| if ($branch eq $needps->{branch}) { |
| push @need, $needps->{id}; |
| } |
| } |
| |
| # print "++++ Merges from $branch we want are....\n"; |
| # print Dumper(\@need); |
| |
| my $newparent; |
| while (my $needed_commit = pop @need) { |
| if ($have{$needed_commit}) { |
| $newparent = $needed_commit; |
| } else { |
| last; # break out of the while |
| } |
| } |
| if ($newparent) { |
| push @parents, $newparent; |
| } |
| |
| |
| } # end foreach branch |
| |
| # prune redundant parents |
| my %parents; |
| foreach my $p (@parents) { |
| $parents{$p} = 1; |
| } |
| foreach my $p (@parents) { |
| next unless exists $psets{$p}{merges}; |
| next unless ref $psets{$p}{merges}; |
| my @merges = @{$psets{$p}{merges}}; |
| foreach my $merge (@merges) { |
| if ($parents{$merge}) { |
| delete $parents{$merge}; |
| } |
| } |
| } |
| |
| @parents = (); |
| foreach (keys %parents) { |
| push @parents, '-p', ptag($_); |
| } |
| return @parents; |
| } |
| |
| sub git_rev_parse { |
| my $name = shift; |
| my $val = safe_pipe_capture(qw(git-rev-parse), $name); |
| die "Error: git-rev-parse $name" if $?; |
| chomp $val; |
| return $val; |
| } |
| |
| # resolve a SHA1 to a known patchset |
| sub commitid2pset { |
| my $commitid = shift; |
| chomp $commitid; |
| my $name = $rptags{$commitid} |
| || die "Cannot find reverse tag mapping for $commitid"; |
| $name =~ s|,|/|; |
| my $ps = $psets{$name} |
| || (print Dumper(sort keys %psets)) && die "Cannot find patchset for $name"; |
| return $ps; |
| } |
| |
| |
| # an alternative to `command` that allows input to be passed as an array |
| # to work around shell problems with weird characters in arguments |
| sub safe_pipe_capture { |
| my @output; |
| if (my $pid = open my $child, '-|') { |
| @output = (<$child>); |
| close $child or die join(' ',@_).": $! $?"; |
| } else { |
| exec(@_) or die "$! $?"; # exec() can fail the executable can't be found |
| } |
| return wantarray ? @output : join('',@output); |
| } |
| |
| # `tla logs -rf -d <dir> | head -n1` or `baz tree-id <dir>` |
| sub arch_tree_id { |
| my $dir = shift; |
| chomp( my $ret = (safe_pipe_capture($TLA,'logs','-rf','-d',$dir))[0] ); |
| return $ret; |
| } |
| |
| sub archive_reachable { |
| my $archive = shift; |
| return 1 if $reachable{$archive}; |
| return 0 if $unreachable{$archive}; |
| |
| if (system "$TLA whereis-archive $archive >/dev/null") { |
| if ($opt_a && (system($TLA,'register-archive', |
| "http://mirrors.sourcecontrol.net/$archive") == 0)) { |
| $reachable{$archive} = 1; |
| return 1; |
| } |
| print STDERR "Archive is unreachable: $archive\n"; |
| $unreachable{$archive} = 1; |
| return 0; |
| } else { |
| $reachable{$archive} = 1; |
| return 1; |
| } |
| } |
