X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=dgit;h=a2e148898c2b7d22ce532ffeeab0c3f4eb4f31ef;hb=b8c951bca96af3217b918fd3d0f9abbf9e0b292e;hp=072f8586877634cb24e6433bc8e5f8d21bdfc68f;hpb=682d66806b24a9d68b0d0cf4da96a8259267341e;p=dgit.git

diff --git a/dgit b/dgit
index 072f8586..a2e14889 100755
--- a/dgit
+++ b/dgit
@@ -1,4 +1,22 @@
 #!/usr/bin/perl -w
+# dgit
+# Integration between git and Debian-style archives
+#
+# Copyright (C)2013 Ian Jackson
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 use strict;
 
 use IO::Handle;
@@ -14,17 +32,25 @@ our $mirror = 'http://mirror.relativity.greenend.org.uk/mirror/debian-ftp/';
 our $suite = 'sid';
 our $package;
 
+our $sign = 1;
+our $nopush = 0;
+
 our $aliothname = 'iwj@git.debian.org';
 our $aliothpath = '/git/dgit-test';
 our $alioth_git = "git+ssh://$aliothname/$aliothpath";
 our $alioth_sshtestbodge = [$aliothname,$aliothpath];
 
 our (@dget_opts) = qw(-u);
+our (@git_tag_opts);
+our (@gpg_opts);
 
 our $remotename = 'dgit';
+our $ourdscfield = 'Vcs-git-master';
 
-sub mainbranch () { return "$suite"; }
-sub uploadbranch () { return "upload/$suite"; }
+sub uploadbranch () { return "dgit/$suite"; }
+sub lref ($) { return "refs/heads/$_[0]"; }
+sub rref ($) { return "refs/remotes/$remotename/$_[0]"; }
+sub debiantag ($) { return "debian/$_[0]"; }
 
 our $ua;
 
@@ -65,7 +91,8 @@ sub parsecontrol {
 
 sub parsechangelog {
     my $c = Dpkg::Control::Hash->new();
-    my $p = new IO::File '-|', qw(dpkg-parsechangelog) or die $!;
+    my $p = new IO::Handle;
+    open $p, '-|', qw(dpkg-parsechangelog) or die $!;
     $c->parse($p);
     $?=0; $!=0; close $p or die "$! $?";
     return $c;
@@ -111,7 +138,7 @@ sub check_for_git () {
     return $r+0;
 }
 
-our ($dsc_hash,$lastupl_hash);
+our ($dsc_hash,$upload_hash);
 
 our $ud = '.git/dgit/unpack';
 
@@ -139,14 +166,23 @@ sub mktree_in_ud_from_only_subdir () {
     return ($tree,$dir);
 }
 
+sub dsc_files () {
+    map {
+	m/^\w+ \d+ (\S+)$/ or die "$_ ?";
+	$1;
+    } grep m/\S/, split /\n/, ($dsc->{'Checksums-Sha256'} || $dsc->{Files});
+}
+
+sub is_orig_file ($) {
+    local ($_) = @_;
+    m/\.orig\.tar\.\w+$/;
+}
+
 sub generate_commit_from_dsc () {
     prep_ud();
     chdir $ud or die $!;
     my @files;
-    foreach (split /\n/, ($dsc->{'Checksums-Sha256'} || $dsc->{Files})) {
-	next unless m/\S/;
-	m/^\w+ \d+ (\S+)$/ or die "$_ ?";
-	my $f = $1;
+    foreach my $f (dsc_files()) {
 	die if $f =~ m#/|^\.|\.dsc$|\.tmp$#;
 	push @files, $f;
 	link "../../../$f", $f
@@ -154,7 +190,7 @@ sub generate_commit_from_dsc () {
 	    or die "$f $!";
     }
     runcmd qw(dget), @dget_opts, qw(--), $dscurl;
-    foreach my $f (grep { m/\.tar\.gz$/ } @files) {
+    foreach my $f (grep { is_orig_file($_) } @files) {
 	link $f, "../../../$f"
 	    or $!==&EEXIST
 	    or die "$f $!";
@@ -169,7 +205,7 @@ sub generate_commit_from_dsc () {
     $authline =~ m/^[^<>]+ \<\S+\> \d+ [-+]\d+$/ or die $authline;
     open C, ">../commit.tmp" or die $!;
     print C "tree $tree\n" or die $!;
-    print C "parent $lastupl_hash\n" or die $! if defined $lastupl_hash;
+    print C "parent $upload_hash\n" or die $! if defined $upload_hash;
     print C <<END or die $!;
 author $authline
 committer $authline
@@ -187,9 +223,9 @@ END
     cmdoutput qw(git log -n2), $commithash;
     # ... gives git a chance to complain if our commit is malformed
     my $outputhash = $commithash;
-    if (defined $lastupl_hash) {
+    if (defined $upload_hash) {
 	chdir "$ud/$dir" or die $!;
-	runcmd qw(git reset --hard), $lastupl_hash;
+	runcmd qw(git reset --hard), $upload_hash;
 	runcmd qw(sh -ec), 'dpkg-parsechangelog >>../changelogold.tmp';
 	my $oldclogp = Dpkg::Control::Hash->new();
 	$oldclogp->parse('../changelogold.tmp','previous changelog') or die;
@@ -214,40 +250,63 @@ END
     return $outputhash;
 }
 
-my $lastupl_ref = "refs/remotes/$remotename/upload/$suite";
+sub ensure_we_have_orig () {
+    foreach my $f (dsc_files()) {
+	next unless is_orig_file($f);
+	if (stat "../$f") {
+	    die "$f ?" unless -f _;
+	} else {
+	    die "$f $!" unless $!==&ENOENT;
+	}
+	my $origurl = $dscurl;
+	$origurl =~ s{/[^/]+$}{};
+	$origurl .= "/$f";
+	die "$f ?" unless $f =~ m/^${package}_/;
+	die "$f ?" if $f =~ m#/#;
+	runcmd qw(sh -ec),'cd ..; exec dget -- "$1"','x',$origurl;
+    }
+}
+
+sub rev_parse ($) {
+    return cmdoutput qw(git rev-parse --), "$_[0]~0";
+}
 
-sub is_fast_ff ($$) {
+sub is_fast_fwd ($$) {
     my ($ancestor,$child) = @_;
-    my $mb = cmdoutput qw(git merge-base), $dsc_hash, $lastupl_hash;
-    return $mb eq $ancestor;
+    my $mb = cmdoutput qw(git merge-base), $dsc_hash, $upload_hash;
+    return rev_parse($mb) eq rev_parse($ancestor);
 }
 
 sub fetch_from_archive () {
-    # ensures that $lastupl_ref is what is actually in the archive,
+    # ensures that rref(uploadbranch()) is what is actually in the archive,
     #  one way or another
-    $!=0; $lastupl_hash = `git show-ref --heads $lastupl_ref`;
+    my $upload_ref = rref(uploadbranch());
+    $!=0; $upload_hash = `git show-ref --heads $upload_ref`;
     die $! if $!;
-    die $? unless ($?==0 && chomp $lastupl_hash) 
-	or ($?==128 && !length $lastupl_hash);
+    die $? unless ($?==0 && chomp $upload_hash) 
+	or ($?==256 && !length $upload_hash);
     my $hash;
     if (defined $dsc_hash) {
+	die "missing git history even though dsc has hash"
+	    unless length $upload_hash;
 	$hash = $dsc_hash;
+	ensure_we_have_orig();
     } else {
 	$hash = generate_commit_from_dsc();
     }
-    if ($lastupl_hash) {
+    if (length $upload_hash) {
 	die "not fast forward on last upload branch!".
 	    " (archive's version left in DGIT_ARCHIVE)"
-	    unless is_fast_ff($lastupl_hash, $dsc_hash);
+	    unless is_fast_fwd($dsc_hash, $upload_hash);
     }
-    if ($lastupl_ref ne $hash) {
-	cmdoutput qw(git update-ref -m), 'dgit fetch', $lastupl_ref, $hash;
+    if ($upload_hash ne $hash) {
+	cmdoutput qw(git update-ref -m), 'dgit fetch', $upload_ref, $hash;
     }
 }
 
 sub clone () {
     get_archive_dsc();
-    $dsc_hash = $dsc->{'Vcs-git-master'};
+    $dsc_hash = $dsc->{$ourdscfield};
     if (defined $dsc_hash) {
 	$dsc_hash =~ m/\w+/ or die "$dsc_hash $?";
 	$dsc_hash = $&;
@@ -262,19 +321,18 @@ sub clone () {
 	    $alioth_git, $dstdir;
 	chdir "$dstdir" or die "$dstdir $!";
 	fetch_from_archive();
-	runcmd qw(git reset --hard), $lastupl_ref;
+	runcmd qw(git reset --hard), rref(uploadbranch());
     } else {
-	die "missing git history even though dsc has hash" if defined $dsc_hash;
 	print "starting new git history\n";
 	mkdir $dstdir or die "$dstdir $!";
 	chdir "$dstdir" or die "$dstdir $!";
 	runcmd qw(git init -q);
 	open H, "> .git/HEAD" or die $!;
-	print H "ref: refs/heads/$suite\n" or die $!;
+	print H "ref: ".lref(uploadbranch())."\n" or die $!;
 	close H or die $!;
 	runcmd qw(git remote add), $remotename, $alioth_git;
 	runcmd "git config branch.$suite.remote $remotename";
-	runcmd "git config branch.$suite.merge refs/heads/$suite";
+	runcmd "git config branch.$suite.merge ".lref(uploadbranch());
 	my $newhash = generate_commit_from_dsc();
 	runcmd qw(git reset --hard), $newhash;
     }
@@ -282,10 +340,19 @@ sub clone () {
 }
 
 sub fetch () {
-    
+    if (check_for_git()) {
+	runcmd qw(git fetch -p),$remotename,
+	    '+refs/heads/*:refs/remotes/origin/*';
+    }
+    fetch_from_archive();
 }
 
-sub push () {
+sub pull () {
+    fetch();
+    runcmd qw(git merge -m),"Merge from $suite [dgit]",lref(uploadbranch());
+}
+
+sub dopush () {
     runcmd qw(git diff --quiet HEAD);
     my $clogp = parsechangelog();
     $package = $clogp->{Source};
@@ -299,17 +366,26 @@ sub push () {
     my $tree = mktree_in_ud_from_only_subdir();
     chdir '../../../..' or die $!;
     runcmd qw(git diff --exit-code), $tree;
-    runcmd qw(git fetch), $alioth_git,
-        map { "$_:refs/remotes/$remotename/$_" }
-        (mainbranch(), uploadbranch());
-    
-    die <<END;
-fetch from alioth
-do fast forward check and maybe fake merge
-push to uploading
-dput
-push to main
-END
+#fetch from alioth
+#do fast forward check and maybe fake merge
+#    if (!is_fast_fwd(mainbranch
+#    runcmd qw(git fetch -p ), $alioth_git,
+#        map { lref($_).":".rref($_) }
+#        (uploadbranch());
+    $dsc->{$ourdscfield} = rev_parse('HEAD');
+    $dsc->save("../$dscfn.tmp") or die $!;
+    rename "../$dscfn.tmp","../$dscfn" or die "$dscfn $!";
+    if ($sign) {
+	runcmd qw(git tag -s),@git_tag_opts,qw(-m),
+	    "Release $dsc->{Version} for $suite [dgit]";
+	unlink "../$dscfn.asc" or $!==&ENOENT or die "$dscfn.asc $!";
+	runcmd qw(gpg --clearsign),@gpg_opts,"../$dscfn";
+	rename "../$dscfn.asc","../$dscfn" or die "$dscfn $!";
+    }
+    if (!$nopush) {
+	runcmd qw(git push),$remotename,"HEAD:".lref(uploadbranch());
+	runcmd qw(dput),"../$dscfn";
+    }
 }
 
 sub cmd_clone {
@@ -323,6 +399,41 @@ sub cmd_clone {
     clone();
 }
 
+sub branchsuite () {
+    my $branch = `git-symbolic-ref HEAD`;
+    if ($branch =~ m#^refs/heads/dgit/([^/.]+)$#) {
+	return $1;
+    } else {
+	return undef;
+    }
+}
+
+sub cmd_fetch {
+    my $clogp = parsechangelog();
+    $package = $clogp->{Source};
+    if (@ARGV==0) {
+	$suite = branchsuite();
+	$suite ||= $clogp->{Distribution};
+	print "fetching from suite $suite\n";
+    } elsif (@ARGV==1) {
+	($suite) = @ARGV;
+    } else {
+	die;
+    }
+    fetch();
+}
+
+sub cmd_push {
+    my $clogp = parsechangelog();
+    $package = $clogp->{Source};
+    if (@ARGV==0) {
+	$suite = $clogp->{Distribution};
+    } else {
+	die;
+    }
+    dopush();
+}
+
 sub parseopts () {
     die if @ARGV && $ARGV[0] =~ m/^\-/;
 }