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-rwxr-xr-xcontrib/examples/git-remote.perl477
-rwxr-xr-xcontrib/examples/git-rerere.perl284
2 files changed, 761 insertions, 0 deletions
diff --git a/contrib/examples/git-remote.perl b/contrib/examples/git-remote.perl
new file mode 100755
index 0000000000..b30ed734e7
--- /dev/null
+++ b/contrib/examples/git-remote.perl
@@ -0,0 +1,477 @@
+#!/usr/bin/perl -w
+
+use strict;
+use Git;
+my $git = Git->repository();
+
+sub add_remote_config {
+ my ($hash, $name, $what, $value) = @_;
+ if ($what eq 'url') {
+ # Having more than one is Ok -- it is used for push.
+ if (! exists $hash->{'URL'}) {
+ $hash->{$name}{'URL'} = $value;
+ }
+ }
+ elsif ($what eq 'fetch') {
+ $hash->{$name}{'FETCH'} ||= [];
+ push @{$hash->{$name}{'FETCH'}}, $value;
+ }
+ elsif ($what eq 'push') {
+ $hash->{$name}{'PUSH'} ||= [];
+ push @{$hash->{$name}{'PUSH'}}, $value;
+ }
+ if (!exists $hash->{$name}{'SOURCE'}) {
+ $hash->{$name}{'SOURCE'} = 'config';
+ }
+}
+
+sub add_remote_remotes {
+ my ($hash, $file, $name) = @_;
+
+ if (exists $hash->{$name}) {
+ $hash->{$name}{'WARNING'} = 'ignored due to config';
+ return;
+ }
+
+ my $fh;
+ if (!open($fh, '<', $file)) {
+ print STDERR "Warning: cannot open $file\n";
+ return;
+ }
+ my $it = { 'SOURCE' => 'remotes' };
+ $hash->{$name} = $it;
+ while (<$fh>) {
+ chomp;
+ if (/^URL:\s*(.*)$/) {
+ # Having more than one is Ok -- it is used for push.
+ if (! exists $it->{'URL'}) {
+ $it->{'URL'} = $1;
+ }
+ }
+ elsif (/^Push:\s*(.*)$/) {
+ $it->{'PUSH'} ||= [];
+ push @{$it->{'PUSH'}}, $1;
+ }
+ elsif (/^Pull:\s*(.*)$/) {
+ $it->{'FETCH'} ||= [];
+ push @{$it->{'FETCH'}}, $1;
+ }
+ elsif (/^\#/) {
+ ; # ignore
+ }
+ else {
+ print STDERR "Warning: funny line in $file: $_\n";
+ }
+ }
+ close($fh);
+}
+
+sub list_remote {
+ my ($git) = @_;
+ my %seen = ();
+ my @remotes = eval {
+ $git->command(qw(config --get-regexp), '^remote\.');
+ };
+ for (@remotes) {
+ if (/^remote\.(\S+?)\.([^.\s]+)\s+(.*)$/) {
+ add_remote_config(\%seen, $1, $2, $3);
+ }
+ }
+
+ my $dir = $git->repo_path() . "/remotes";
+ if (opendir(my $dh, $dir)) {
+ local $_;
+ while ($_ = readdir($dh)) {
+ chomp;
+ next if (! -f "$dir/$_" || ! -r _);
+ add_remote_remotes(\%seen, "$dir/$_", $_);
+ }
+ }
+
+ return \%seen;
+}
+
+sub add_branch_config {
+ my ($hash, $name, $what, $value) = @_;
+ if ($what eq 'remote') {
+ if (exists $hash->{$name}{'REMOTE'}) {
+ print STDERR "Warning: more than one branch.$name.remote\n";
+ }
+ $hash->{$name}{'REMOTE'} = $value;
+ }
+ elsif ($what eq 'merge') {
+ $hash->{$name}{'MERGE'} ||= [];
+ push @{$hash->{$name}{'MERGE'}}, $value;
+ }
+}
+
+sub list_branch {
+ my ($git) = @_;
+ my %seen = ();
+ my @branches = eval {
+ $git->command(qw(config --get-regexp), '^branch\.');
+ };
+ for (@branches) {
+ if (/^branch\.([^.]*)\.(\S*)\s+(.*)$/) {
+ add_branch_config(\%seen, $1, $2, $3);
+ }
+ }
+
+ return \%seen;
+}
+
+my $remote = list_remote($git);
+my $branch = list_branch($git);
+
+sub update_ls_remote {
+ my ($harder, $info) = @_;
+
+ return if (($harder == 0) ||
+ (($harder == 1) && exists $info->{'LS_REMOTE'}));
+
+ my @ref = map {
+ s|^[0-9a-f]{40}\s+refs/heads/||;
+ $_;
+ } $git->command(qw(ls-remote --heads), $info->{'URL'});
+ $info->{'LS_REMOTE'} = \@ref;
+}
+
+sub list_wildcard_mapping {
+ my ($forced, $ours, $ls) = @_;
+ my %refs;
+ for (@$ls) {
+ $refs{$_} = 01; # bit #0 to say "they have"
+ }
+ for ($git->command('for-each-ref', "refs/remotes/$ours")) {
+ chomp;
+ next unless (s|^[0-9a-f]{40}\s[a-z]+\srefs/remotes/$ours/||);
+ next if ($_ eq 'HEAD');
+ $refs{$_} ||= 0;
+ $refs{$_} |= 02; # bit #1 to say "we have"
+ }
+ my (@new, @stale, @tracked);
+ for (sort keys %refs) {
+ my $have = $refs{$_};
+ if ($have == 1) {
+ push @new, $_;
+ }
+ elsif ($have == 2) {
+ push @stale, $_;
+ }
+ elsif ($have == 3) {
+ push @tracked, $_;
+ }
+ }
+ return \@new, \@stale, \@tracked;
+}
+
+sub list_mapping {
+ my ($name, $info) = @_;
+ my $fetch = $info->{'FETCH'};
+ my $ls = $info->{'LS_REMOTE'};
+ my (@new, @stale, @tracked);
+
+ for (@$fetch) {
+ next unless (/(\+)?([^:]+):(.*)/);
+ my ($forced, $theirs, $ours) = ($1, $2, $3);
+ if ($theirs eq 'refs/heads/*' &&
+ $ours =~ /^refs\/remotes\/(.*)\/\*$/) {
+ # wildcard mapping
+ my ($w_new, $w_stale, $w_tracked)
+ = list_wildcard_mapping($forced, $1, $ls);
+ push @new, @$w_new;
+ push @stale, @$w_stale;
+ push @tracked, @$w_tracked;
+ }
+ elsif ($theirs =~ /\*/ || $ours =~ /\*/) {
+ print STDERR "Warning: unrecognized mapping in remotes.$name.fetch: $_\n";
+ }
+ elsif ($theirs =~ s|^refs/heads/||) {
+ if (!grep { $_ eq $theirs } @$ls) {
+ push @stale, $theirs;
+ }
+ elsif ($ours ne '') {
+ push @tracked, $theirs;
+ }
+ }
+ }
+ return \@new, \@stale, \@tracked;
+}
+
+sub show_mapping {
+ my ($name, $info) = @_;
+ my ($new, $stale, $tracked) = list_mapping($name, $info);
+ if (@$new) {
+ print " New remote branches (next fetch will store in remotes/$name)\n";
+ print " @$new\n";
+ }
+ if (@$stale) {
+ print " Stale tracking branches in remotes/$name (use 'git remote prune')\n";
+ print " @$stale\n";
+ }
+ if (@$tracked) {
+ print " Tracked remote branches\n";
+ print " @$tracked\n";
+ }
+}
+
+sub prune_remote {
+ my ($name, $ls_remote) = @_;
+ if (!exists $remote->{$name}) {
+ print STDERR "No such remote $name\n";
+ return 1;
+ }
+ my $info = $remote->{$name};
+ update_ls_remote($ls_remote, $info);
+
+ my ($new, $stale, $tracked) = list_mapping($name, $info);
+ my $prefix = "refs/remotes/$name";
+ foreach my $to_prune (@$stale) {
+ my @v = $git->command(qw(rev-parse --verify), "$prefix/$to_prune");
+ $git->command(qw(update-ref -d), "$prefix/$to_prune", $v[0]);
+ }
+ return 0;
+}
+
+sub show_remote {
+ my ($name, $ls_remote) = @_;
+ if (!exists $remote->{$name}) {
+ print STDERR "No such remote $name\n";
+ return 1;
+ }
+ my $info = $remote->{$name};
+ update_ls_remote($ls_remote, $info);
+
+ print "* remote $name\n";
+ print " URL: $info->{'URL'}\n";
+ for my $branchname (sort keys %$branch) {
+ next unless (defined $branch->{$branchname}{'REMOTE'} &&
+ $branch->{$branchname}{'REMOTE'} eq $name);
+ my @merged = map {
+ s|^refs/heads/||;
+ $_;
+ } split(' ',"@{$branch->{$branchname}{'MERGE'}}");
+ next unless (@merged);
+ print " Remote branch(es) merged with 'git pull' while on branch $branchname\n";
+ print " @merged\n";
+ }
+ if ($info->{'LS_REMOTE'}) {
+ show_mapping($name, $info);
+ }
+ if ($info->{'PUSH'}) {
+ my @pushed = map {
+ s|^refs/heads/||;
+ s|^\+refs/heads/|+|;
+ s|:refs/heads/|:|;
+ $_;
+ } @{$info->{'PUSH'}};
+ print " Local branch(es) pushed with 'git push'\n";
+ print " @pushed\n";
+ }
+ return 0;
+}
+
+sub add_remote {
+ my ($name, $url, $opts) = @_;
+ if (exists $remote->{$name}) {
+ print STDERR "remote $name already exists.\n";
+ exit(1);
+ }
+ $git->command('config', "remote.$name.url", $url);
+ my $track = $opts->{'track'} || ["*"];
+
+ for (@$track) {
+ $git->command('config', '--add', "remote.$name.fetch",
+ $opts->{'mirror'} ?
+ "+refs/$_:refs/$_" :
+ "+refs/heads/$_:refs/remotes/$name/$_");
+ }
+ if ($opts->{'fetch'}) {
+ $git->command('fetch', $name);
+ }
+ if (exists $opts->{'master'}) {
+ $git->command('symbolic-ref', "refs/remotes/$name/HEAD",
+ "refs/remotes/$name/$opts->{'master'}");
+ }
+}
+
+sub update_remote {
+ my ($name) = @_;
+ my @remotes;
+
+ my $conf = $git->config("remotes." . $name);
+ if (defined($conf)) {
+ @remotes = split(' ', $conf);
+ } elsif ($name eq 'default') {
+ @remotes = ();
+ for (sort keys %$remote) {
+ my $do_fetch = $git->config_bool("remote." . $_ .
+ ".skipDefaultUpdate");
+ unless ($do_fetch) {
+ push @remotes, $_;
+ }
+ }
+ } else {
+ print STDERR "Remote group $name does not exists.\n";
+ exit(1);
+ }
+ for (@remotes) {
+ print "Updating $_\n";
+ $git->command('fetch', "$_");
+ }
+}
+
+sub rm_remote {
+ my ($name) = @_;
+ if (!exists $remote->{$name}) {
+ print STDERR "No such remote $name\n";
+ return 1;
+ }
+
+ $git->command('config', '--remove-section', "remote.$name");
+
+ eval {
+ my @trackers = $git->command('config', '--get-regexp',
+ 'branch.*.remote', $name);
+ for (@trackers) {
+ /^branch\.(.*)?\.remote/;
+ $git->config('--unset', "branch.$1.remote");
+ $git->config('--unset', "branch.$1.merge");
+ }
+ };
+
+ my @refs = $git->command('for-each-ref',
+ '--format=%(refname) %(objectname)', "refs/remotes/$name");
+ for (@refs) {
+ my ($ref, $object) = split;
+ $git->command(qw(update-ref -d), $ref, $object);
+ }
+ return 0;
+}
+
+sub add_usage {
+ print STDERR "Usage: git remote add [-f] [-t track]* [-m master] <name> <url>\n";
+ exit(1);
+}
+
+my $VERBOSE = 0;
+@ARGV = grep {
+ if ($_ eq '-v' or $_ eq '--verbose') {
+ $VERBOSE=1;
+ 0
+ } else {
+ 1
+ }
+} @ARGV;
+
+if (!@ARGV) {
+ for (sort keys %$remote) {
+ print "$_";
+ print "\t$remote->{$_}->{URL}" if $VERBOSE;
+ print "\n";
+ }
+}
+elsif ($ARGV[0] eq 'show') {
+ my $ls_remote = 1;
+ my $i;
+ for ($i = 1; $i < @ARGV; $i++) {
+ if ($ARGV[$i] eq '-n') {
+ $ls_remote = 0;
+ }
+ else {
+ last;
+ }
+ }
+ if ($i >= @ARGV) {
+ print STDERR "Usage: git remote show <remote>\n";
+ exit(1);
+ }
+ my $status = 0;
+ for (; $i < @ARGV; $i++) {
+ $status |= show_remote($ARGV[$i], $ls_remote);
+ }
+ exit($status);
+}
+elsif ($ARGV[0] eq 'update') {
+ if (@ARGV <= 1) {
+ update_remote("default");
+ exit(1);
+ }
+ for (my $i = 1; $i < @ARGV; $i++) {
+ update_remote($ARGV[$i]);
+ }
+}
+elsif ($ARGV[0] eq 'prune') {
+ my $ls_remote = 1;
+ my $i;
+ for ($i = 1; $i < @ARGV; $i++) {
+ if ($ARGV[$i] eq '-n') {
+ $ls_remote = 0;
+ }
+ else {
+ last;
+ }
+ }
+ if ($i >= @ARGV) {
+ print STDERR "Usage: git remote prune <remote>\n";
+ exit(1);
+ }
+ my $status = 0;
+ for (; $i < @ARGV; $i++) {
+ $status |= prune_remote($ARGV[$i], $ls_remote);
+ }
+ exit($status);
+}
+elsif ($ARGV[0] eq 'add') {
+ my %opts = ();
+ while (1 < @ARGV && $ARGV[1] =~ /^-/) {
+ my $opt = $ARGV[1];
+ shift @ARGV;
+ if ($opt eq '-f' || $opt eq '--fetch') {
+ $opts{'fetch'} = 1;
+ next;
+ }
+ if ($opt eq '-t' || $opt eq '--track') {
+ if (@ARGV < 1) {
+ add_usage();
+ }
+ $opts{'track'} ||= [];
+ push @{$opts{'track'}}, $ARGV[1];
+ shift @ARGV;
+ next;
+ }
+ if ($opt eq '-m' || $opt eq '--master') {
+ if ((@ARGV < 1) || exists $opts{'master'}) {
+ add_usage();
+ }
+ $opts{'master'} = $ARGV[1];
+ shift @ARGV;
+ next;
+ }
+ if ($opt eq '--mirror') {
+ $opts{'mirror'} = 1;
+ next;
+ }
+ add_usage();
+ }
+ if (@ARGV != 3) {
+ add_usage();
+ }
+ add_remote($ARGV[1], $ARGV[2], \%opts);
+}
+elsif ($ARGV[0] eq 'rm') {
+ if (@ARGV <= 1) {
+ print STDERR "Usage: git remote rm <remote>\n";
+ exit(1);
+ }
+ exit(rm_remote($ARGV[1]));
+}
+else {
+ print STDERR "Usage: git remote\n";
+ print STDERR " git remote add <name> <url>\n";
+ print STDERR " git remote rm <name>\n";
+ print STDERR " git remote show <name>\n";
+ print STDERR " git remote prune <name>\n";
+ print STDERR " git remote update [group]\n";
+ exit(1);
+}
diff --git a/contrib/examples/git-rerere.perl b/contrib/examples/git-rerere.perl
new file mode 100755
index 0000000000..4f692091e7
--- /dev/null
+++ b/contrib/examples/git-rerere.perl
@@ -0,0 +1,284 @@
+#!/usr/bin/perl
+#
+# REuse REcorded REsolve. This tool records a conflicted automerge
+# result and its hand resolution, and helps to resolve future
+# automerge that results in the same conflict.
+#
+# To enable this feature, create a directory 'rr-cache' under your
+# .git/ directory.
+
+use Digest;
+use File::Path;
+use File::Copy;
+
+my $git_dir = $::ENV{GIT_DIR} || ".git";
+my $rr_dir = "$git_dir/rr-cache";
+my $merge_rr = "$git_dir/rr-cache/MERGE_RR";
+
+my %merge_rr = ();
+
+sub read_rr {
+ if (!-f $merge_rr) {
+ %merge_rr = ();
+ return;
+ }
+ my $in;
+ local $/ = "\0";
+ open $in, "<$merge_rr" or die "$!: $merge_rr";
+ while (<$in>) {
+ chomp;
+ my ($name, $path) = /^([0-9a-f]{40})\t(.*)$/s;
+ $merge_rr{$path} = $name;
+ }
+ close $in;
+}
+
+sub write_rr {
+ my $out;
+ open $out, ">$merge_rr" or die "$!: $merge_rr";
+ for my $path (sort keys %merge_rr) {
+ my $name = $merge_rr{$path};
+ print $out "$name\t$path\0";
+ }
+ close $out;
+}
+
+sub compute_conflict_name {
+ my ($path) = @_;
+ my @side = ();
+ my $in;
+ open $in, "<$path" or die "$!: $path";
+
+ my $sha1 = Digest->new("SHA-1");
+ my $hunk = 0;
+ while (<$in>) {
+ if (/^<<<<<<< .*/) {
+ $hunk++;
+ @side = ([], undef);
+ }
+ elsif (/^=======$/) {
+ $side[1] = [];
+ }
+ elsif (/^>>>>>>> .*/) {
+ my ($one, $two);
+ $one = join('', @{$side[0]});
+ $two = join('', @{$side[1]});
+ if ($two le $one) {
+ ($one, $two) = ($two, $one);
+ }
+ $sha1->add($one);
+ $sha1->add("\0");
+ $sha1->add($two);
+ $sha1->add("\0");
+ @side = ();
+ }
+ elsif (@side == 0) {
+ next;
+ }
+ elsif (defined $side[1]) {
+ push @{$side[1]}, $_;
+ }
+ else {
+ push @{$side[0]}, $_;
+ }
+ }
+ close $in;
+ return ($sha1->hexdigest, $hunk);
+}
+
+sub record_preimage {
+ my ($path, $name) = @_;
+ my @side = ();
+ my ($in, $out);
+ open $in, "<$path" or die "$!: $path";
+ open $out, ">$name" or die "$!: $name";
+
+ while (<$in>) {
+ if (/^<<<<<<< .*/) {
+ @side = ([], undef);
+ }
+ elsif (/^=======$/) {
+ $side[1] = [];
+ }
+ elsif (/^>>>>>>> .*/) {
+ my ($one, $two);
+ $one = join('', @{$side[0]});
+ $two = join('', @{$side[1]});
+ if ($two le $one) {
+ ($one, $two) = ($two, $one);
+ }
+ print $out "<<<<<<<\n";
+ print $out $one;
+ print $out "=======\n";
+ print $out $two;
+ print $out ">>>>>>>\n";
+ @side = ();
+ }
+ elsif (@side == 0) {
+ print $out $_;
+ }
+ elsif (defined $side[1]) {
+ push @{$side[1]}, $_;
+ }
+ else {
+ push @{$side[0]}, $_;
+ }
+ }
+ close $out;
+ close $in;
+}
+
+sub find_conflict {
+ my $in;
+ local $/ = "\0";
+ my $pid = open($in, '-|');
+ die "$!" unless defined $pid;
+ if (!$pid) {
+ exec(qw(git ls-files -z -u)) or die "$!: ls-files";
+ }
+ my %path = ();
+ my @path = ();
+ while (<$in>) {
+ chomp;
+ my ($mode, $sha1, $stage, $path) =
+ /^([0-7]+) ([0-9a-f]{40}) ([123])\t(.*)$/s;
+ $path{$path} |= (1 << $stage);
+ }
+ close $in;
+ while (my ($path, $status) = each %path) {
+ if ($status == 14) { push @path, $path; }
+ }
+ return @path;
+}
+
+sub merge {
+ my ($name, $path) = @_;
+ record_preimage($path, "$rr_dir/$name/thisimage");
+ unless (system('git', 'merge-file', map { "$rr_dir/$name/${_}image" }
+ qw(this pre post))) {
+ my $in;
+ open $in, "<$rr_dir/$name/thisimage" or
+ die "$!: $name/thisimage";
+ my $out;
+ open $out, ">$path" or die "$!: $path";
+ while (<$in>) { print $out $_; }
+ close $in;
+ close $out;
+ return 1;
+ }
+ return 0;
+}
+
+sub garbage_collect_rerere {
+ # We should allow specifying these from the command line and
+ # that is why the caller gives @ARGV to us, but I am lazy.
+
+ my $cutoff_noresolve = 15; # two weeks
+ my $cutoff_resolve = 60; # two months
+ my @to_remove;
+ while (<$rr_dir/*/preimage>) {
+ my ($dir) = /^(.*)\/preimage$/;
+ my $cutoff = ((-f "$dir/postimage")
+ ? $cutoff_resolve
+ : $cutoff_noresolve);
+ my $age = -M "$_";
+ if ($cutoff <= $age) {
+ push @to_remove, $dir;
+ }
+ }
+ if (@to_remove) {
+ rmtree(\@to_remove);
+ }
+}
+
+-d "$rr_dir" || exit(0);
+
+read_rr();
+
+if (@ARGV) {
+ my $arg = shift @ARGV;
+ if ($arg eq 'clear') {
+ for my $path (keys %merge_rr) {
+ my $name = $merge_rr{$path};
+ if (-d "$rr_dir/$name" &&
+ ! -f "$rr_dir/$name/postimage") {
+ rmtree(["$rr_dir/$name"]);
+ }
+ }
+ unlink $merge_rr;
+ }
+ elsif ($arg eq 'status') {
+ for my $path (keys %merge_rr) {
+ print $path, "\n";
+ }
+ }
+ elsif ($arg eq 'diff') {
+ for my $path (keys %merge_rr) {
+ my $name = $merge_rr{$path};
+ system('diff', ((@ARGV == 0) ? ('-u') : @ARGV),
+ '-L', "a/$path", '-L', "b/$path",
+ "$rr_dir/$name/preimage", $path);
+ }
+ }
+ elsif ($arg eq 'gc') {
+ garbage_collect_rerere(@ARGV);
+ }
+ else {
+ die "$0 unknown command: $arg\n";
+ }
+ exit 0;
+}
+
+my %conflict = map { $_ => 1 } find_conflict();
+
+# MERGE_RR records paths with conflicts immediately after merge
+# failed. Some of the conflicted paths might have been hand resolved
+# in the working tree since then, but the initial run would catch all
+# and register their preimages.
+
+for my $path (keys %conflict) {
+ # This path has conflict. If it is not recorded yet,
+ # record the pre-image.
+ if (!exists $merge_rr{$path}) {
+ my ($name, $hunk) = compute_conflict_name($path);
+ next unless ($hunk);
+ $merge_rr{$path} = $name;
+ if (! -d "$rr_dir/$name") {
+ mkpath("$rr_dir/$name", 0, 0777);
+ print STDERR "Recorded preimage for '$path'\n";
+ record_preimage($path, "$rr_dir/$name/preimage");
+ }
+ }
+}
+
+# Now some of the paths that had conflicts earlier might have been
+# hand resolved. Others may be similar to a conflict already that
+# was resolved before.
+
+for my $path (keys %merge_rr) {
+ my $name = $merge_rr{$path};
+
+ # We could resolve this automatically if we have images.
+ if (-f "$rr_dir/$name/preimage" &&
+ -f "$rr_dir/$name/postimage") {
+ if (merge($name, $path)) {
+ print STDERR "Resolved '$path' using previous resolution.\n";
+ # Then we do not have to worry about this path
+ # anymore.
+ delete $merge_rr{$path};
+ next;
+ }
+ }
+
+ # Let's see if we have resolved it.
+ (undef, my $hunk) = compute_conflict_name($path);
+ next if ($hunk);
+
+ print STDERR "Recorded resolution for '$path'.\n";
+ copy($path, "$rr_dir/$name/postimage");
+ # And we do not have to worry about this path anymore.
+ delete $merge_rr{$path};
+}
+
+# Write out the rest.
+write_rr();
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-02 11:08:09 +0000