X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=dgit;h=b3071b71347d9dec2ae3c14d09e56e02cc92f07a;hb=5e8aa6d1695b5eb47a928d1d546605bdf924c494;hp=99cb7fe29196830abc0f483bb703f169adf806d6;hpb=e5b0f5ddd4130e408391839bc9512eac55e38808;p=dgit.git

diff --git a/dgit b/dgit
index 99cb7fe2..b3071b71 100755
--- a/dgit
+++ b/dgit
@@ -61,7 +61,7 @@ our $cleanmode;
 our $changes_since_version;
 our $rmchanges;
 our $quilt_mode;
-our $quilt_modes_re = 'linear|smash|auto|nofix|nocheck|gbp|apply';
+our $quilt_modes_re = 'linear|smash|auto|nofix|nocheck|gbp|unapplied';
 our $we_are_responder;
 our $initiator_tempdir;
 
@@ -70,6 +70,8 @@ our %format_ok = map { $_=>1 } ("1.0","3.0 (native)","3.0 (quilt)");
 our $suite_re = '[-+.0-9a-z]+';
 our $cleanmode_re = 'dpkg-source(?:-d)?|git|git-ff|check|none';
 
+our $git_authline_re = '^([^<>]+) \<(\S+)\> (\d+ [-+]\d+)$';
+
 our (@git) = qw(git);
 our (@dget) = qw(dget);
 our (@curl) = qw(curl -f);
@@ -83,6 +85,7 @@ our (@dpkgbuildpackage) = qw(dpkg-buildpackage -i\.git/ -I.git);
 our (@dpkgsource) = qw(dpkg-source -i\.git/ -I.git);
 our (@dpkggenchanges) = qw(dpkg-genchanges);
 our (@mergechanges) = qw(mergechanges -f);
+our (@gbppq) = qw(gbp-pq);
 our (@changesopts) = ('');
 
 our %opts_opt_map = ('dget' => \@dget, # accept for compatibility
@@ -114,6 +117,7 @@ autoflush STDOUT 1;
 
 our $supplementary_message = '';
 our $need_split_build_invocation = 0;
+our $split_brain = 0;
 
 END {
     local ($@, $?);
@@ -1314,9 +1318,10 @@ sub clogp_authline ($) {
     $author =~ s#,.*##ms;
     my $date = cmdoutput qw(date), '+%s %z', qw(-d), getfield($clogp,'Date');
     my $authline = "$author $date";
-    $authline =~ m/^[^<>]+ \<\S+\> \d+ [-+]\d+$/ or
+    $authline =~ m/$git_authline_re/o or
 	fail "unexpected commit author line format \`$authline'".
 	" (was generated from changelog Maintainer field)";
+    return ($1,$2,$3) if wantarray;
     return $authline;
 }
 
@@ -2513,8 +2518,9 @@ END
 sub quiltify_trees_differ ($$;$) {
     my ($x,$y,$finegrained) = @_;
     # returns true iff the two tree objects differ other than in debian/
-    # returns bitmas 01 - differ in upstream files except .gitignore
-    #                02 - differ in .gitignore
+    # with $finegrained,
+    # returns bitmask 01 - differ in upstream files except .gitignore
+    #                 02 - differ in .gitignore
     local $/=undef;
     my @cmd = (@git, qw(diff-tree --name-only -z));
     push @cmd, qw(-r) if $finegrained;
@@ -2536,14 +2542,59 @@ sub quiltify_tree_sentinelfiles ($) {
         qw(-- debian/rules debian/control);
     $r =~ s/\n/,/g;
     return $r;
-}
+				 }
+
+sub quiltify_splitbrain_needed () {
+    if (!$split_brain) {
+	progress "creating dgit view";
+	runcmd @git, qw(checkout -q -b dgit-view);
+	$split_brain = 1;
+    }
+}
+
+sub quiltify_splitbrain ($$) {
+    my ($clogp, $diffbits) = @_;
+    if ($quilt_mode !~ m/gbp|dpm/) {
+	# treat .gitignore just like any other upstream file
+	$diffbits = { %$diffbits };
+	$_ = !!$_ foreach values %$diffbits;
+    }
+    # We would like any commits we generate to be reproducible
+    my @authline = clogp_authline($clogp);
+    local $ENV{GIT_COMMITTER_NAME} =  $authline[0];
+    local $ENV{GIT_COMMITTER_EMAIL} = $authline[1];
+    local $ENV{GIT_COMMITTER_DATE} =  $authline[2];
+    if ($quilt_mode =~ m/gbp|unapplied/ &&
+	($diffbits->{O2A} & 01) && # some patches
+	!($diffbits->{H2O} & 01)) { # but HEAD is like orig
+	quiltify_splitbrain_needed();
+	progress "creating patches-applied version using gbp-pq";
+	open STDOUT, ">/dev/null" or die $!;
+	runcmd shell_cmd 'exec >/dev/null', @gbppq, qw(import);
+    }
+    if (($diffbits->{H2O} & 02) && # user has modified .gitignore
+	!($diffbits->{O2A} & 02)) { # patches do not change .gitignore
+	quiltify_splitbrain_needed();
+	progress "creating patch to represent .gitignore changes";
+	my $gipatch = "debian/patches/auto-gitignore";
+	open GIPATCH, ">>", "$gipatch" or die "$gipatch: $!";
+	stat GIPATCH or die "$gipatch: $!";
+	fail "$gipatch already exists; but want to create it".
+	    " to record .gitignore changes" if (stat _)[7];
+	print GIPATCH <<END or die "$gipatch: $!";
+Subject: Update .gitignore from Debian packaging branch
+
+The Debian packaging git branch contains these updates to the upstream
+.gitignore file(s).  This patch is autogenerated, to provide these
+updates to users of the official Debian archive view of the package.
 
-sub quiltify_splitbrain () {
-    # memoisation via git-reflog
-    my $may_apply = $quilt_mode =~ m/gbp|apply/;
-    die "xxx not yet implemented";
-#    if ($may_apply &&
-#	quiltify_trees_differ($userhead,)) {}
+---
+END
+    die 'xxx gitignore';
+	
+    }
+    die 'xxx memoisation via git-reflog';
+    die 'xxx fast forward (should not depend on quilt mode, but will always be needed if we did $split_brain)';
 }
 
 sub quiltify ($$$$) {
@@ -2994,20 +3045,26 @@ END
     rmtree '.pc';
     runcmd @git, qw(add -Af .);
     my $oldtiptree=git_write_tree();
+    printdebug "fake o+d/p tree object $unapplied\n";
     changedir '../work';
 
 
     # We calculate some guesswork now about what kind of tree this might
     # be.  This is mostly for error reporting.
 
-    my $user2unapplied    = quiltify_trees_differ($headref,   $unapplied, 1);
-    my $user2applied      = quiltify_trees_differ($headref,   $oldtiptree,1);
-    my $applied2unapplied = quiltify_trees_differ($oldtiptree,$unapplied, 1);
+    my $diffbits = {
+        # H = user's HEAD
+        # O = orig, without patches applied
+        # A = "applied", ie orig with H's debian/patches applied
+        H2O => quiltify_trees_differ($headref,  $unapplied, 1),
+        H2A => quiltify_trees_differ($headref,  $oldtiptree,1),
+        O2A => quiltify_trees_differ($unapplied,$oldtiptree,1),
+    };
 
     my @dl;
     foreach my $b (qw(01 02)) {
-        foreach my $v ($user2unapplied, $applied2unapplied, $user2applied) {
-            push @dl, ($v & $b) ? '##' : '==';
+        foreach my $v (qw(H2O O2A H2A)) {
+            push @dl, ($diffbits->{$v} & $b) ? '##' : '==';
         }
     }
     printdebug "differences \@dl @dl.\n";
@@ -3019,16 +3076,16 @@ END
                                  $dl[2],                     $dl[5];
 
     my @failsuggestion;
-    if (!($user2unapplied & $applied2unapplied)) {
+    if (!($diffbits->{H2O} & $diffbits->{O2A})) {
         push @failsuggestion, "This might be a patches-unapplied branch.";
-    }  elsif (!($user2applied & $applied2unapplied)) {
+    }  elsif (!($diffbits->{H2A} & $diffbits->{O2A})) {
         push @failsuggestion, "This might be a patches-applied branch.";
     }
-    push @failsuggestion,
- "Maybe you need to specify one of  --quilt=apply --quilt=gbp --quilt=dpm  ?";
+    push @failsuggestion, "Maybe you need to specify one of".
+        " --quilt=gbp --quilt=dpm --quilt=unapplied ?";
 
-    if ($quilt_mode =~ m/gbp|dpm|apply/) {
-	quiltify_splitbrain();
+    if ($quilt_mode =~ m/gbp|dpm|unapplied/) {
+	quiltify_splitbrain($clogp, $diffbits);
 	return;
     }