X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/5288be3af7c24814011130306725c24df792cc06..c202b4fa967c3cf98a9504a9ac98d5b931819a5e:/support/patch-update

diff --git a/support/patch-update b/support/patch-update
index 14360c13..4892d668 100755
--- a/support/patch-update
+++ b/support/patch-update
@@ -6,10 +6,33 @@
 # diffs.
 
 use strict;
+use Getopt::Long;
+
+my $patches_dir = 'patches';
+my $tmp_dir = "patches.$$";
+
+&Getopt::Long::Configure('bundling');
+&usage if !&GetOptions(
+    'skip-check' => \( my $skip_branch_check ),
+    'shell|s' => \( my $launch_shell ),
+    'gen:s' => \( my $incl_generated_files ),
+    'help|h' => \( my $help_opt ),
+);
+&usage if $help_opt;
+
+if (defined $incl_generated_files) {
+    $patches_dir = $incl_generated_files if $incl_generated_files ne '';
+    $incl_generated_files = 1;
+}
 
-die "No 'patches' directory present in the current dir.\n" unless -d 'patches';
+die "No '$patches_dir' directory was found.\n" unless -d $patches_dir;
 die "No '.git' directory present in the current dir.\n" unless -d '.git';
 
+my($status, $is_clean, $starting_branch) = &check_git_status;
+if (!$skip_branch_check && !$is_clean) {
+    die "The checkout is not clean:\n", $status;
+}
+
 my @extra_files;
 open(IN, '<', 'Makefile.in') or die "Couldn't open Makefile.in: $!\n";
 while (<IN>) {
@@ -23,36 +46,28 @@ while (<IN>) {
 }
 close IN;
 
-my $incl_generated_files = shift if @ARGV && $ARGV[0] eq '--gen';
-
-system "git checkout master" and exit 1;
 if ($incl_generated_files) {
-    die "'a' must not exist in the current directory.\n" if -e 'a';
-    die "'b' must not exist in the current directory.\n" if -e 'b';
-    system "make gen && rsync -a @extra_files a/" and exit 1;
+    die "'$tmp_dir' must not exist in the current directory.\n" if -e $tmp_dir;
+    mkdir($tmp_dir, 0700) or die "Unable to mkdir($tmp_dir): $!\n";
+    system "./config.status Makefile && make gen && rsync -a @extra_files $tmp_dir/master/" and exit 1;
 }
 my $last_touch = time;
 
-my(@patches, %local_patch);
-if (@ARGV) {
-    foreach (@ARGV) {
-	s{^(patches|patch|origin/patch)/} {};
-	s{\.diff$} {};
-	push(@patches, $_);
-    }
-    open(PIPE, '-|', 'git', 'branch', '-l') or die $!;
-} else {
-    open(PIPE, '-|', 'git', 'branch', '-a') or die $!;
-}
+my(%patches, %local_patch);
+
+# Start by finding all patches so that we can load all possible parents.
+open(PIPE, '-|', 'git', 'branch', '-a') or die $!;
 while (<PIPE>) {
     if (m# origin/patch/(.*)#) {
-	push(@patches, $1);
+	$patches{$1} = 1;
     } elsif (m# patch/(.*)#) {
-	$local_patch{$1} = 1;
+	$patches{$1} = $local_patch{$1} = 1;
     }
 }
 close PIPE;
 
+my @patches = sort keys %patches;
+
 my(%parent, %description);
 foreach my $patch (@patches) {
     my $branch = ($local_patch{$patch} ? '' : 'origin/') . "patch/$patch";
@@ -71,18 +86,28 @@ foreach my $patch (@patches) {
     $description{$patch} = $desc;
 }
 
+if (@ARGV) {
+    # Limit the list of patches to actually process based on @ARGV.
+    @patches = ( );
+    foreach (@ARGV) {
+	s{^(patches|patch|origin/patch)/} {};
+	s{\.diff$} {};
+	push(@patches, $_);
+    }
+}
+
 my %completed;
 foreach my $patch (@patches) {
     next if $completed{$patch}++;
-    update_patch($patch);
+    last unless update_patch($patch);
 }
 
 if ($incl_generated_files) {
-    system "rm -rf a b";
+    system "rm -rf $tmp_dir";
 }
 
 sleep 1 if $last_touch == time;
-system "git checkout master";
+system "git checkout $starting_branch" and exit 1;
 
 exit;
 
@@ -105,22 +130,33 @@ sub update_patch
 
     sleep 1 if $incl_generated_files && $last_touch == time;
     if ($local_patch{$patch}) {
-	system "git checkout patch/$patch" and exit 1;
+	system "git checkout patch/$patch" and return 0;
     } else {
-	system "git checkout --track -b patch/$patch origin/patch/$patch" and exit 1;
+	system "git checkout --track -b patch/$patch origin/patch/$patch" and return 0;
     }
 
-    open(OUT, '>', "patches/$patch.diff") or die $!;
-    print OUT $description{$patch}, "\n";
-
-    if (system("git rebase -m $parent") != 0) {
-	print qq|"git rebase -m $parent" incomplete -- please fix.\n|;
+    my $ok = system("git merge $parent") == 0;
+    if (!$ok || $launch_shell) {
+	print qq|"git merge $parent" incomplete -- please fix.\n| if !$ok;
 	$ENV{PS1} = "[$parent] patch/$patch: ";
-	system $ENV{SHELL} and exit 1;
+	while (1) {
+	    if (system($ENV{SHELL}) != 0) {
+		print "Abort? [n/y] ";
+		$_ = <STDIN>;
+		next unless /^y/i;
+		return 0;
+	    }
+	    ($status, $is_clean) = &check_git_status;
+	    last if $is_clean;
+	    print $status;
+	}
     }
 
+    open(OUT, '>', "$patches_dir/$patch.diff") or die $!;
+    print OUT $description{$patch}, "\n";
+
     if ($incl_generated_files) {
-	system "make gen && rsync -a @extra_files b/" and exit 1;
+	system "./config.status Makefile && make gen && rsync -a @extra_files $tmp_dir/$patch/";
     }
     $last_touch = time;
 
@@ -138,13 +174,40 @@ sub update_patch
     close PIPE;
 
     if ($incl_generated_files) {
-	open(PIPE, '-|', 'diff', '-up', 'a', 'b') or die $!;
+	$parent =~ s#.*/##;
+	open(PIPE, '-|', 'diff', '-up', "$tmp_dir/$parent", "$tmp_dir/$patch") or die $!;
 	while (<PIPE>) {
-	    s/^((?:---|\+\+\+) [^\t]+)\t.*/$1/;
+	    s#^(diff -up) $tmp_dir/[^/]+/(.*?) $tmp_dir/[^/]+/(.*)#$1 a/$2 b/$3#o;
+	    s#^\Q---\E $tmp_dir/[^/]+/([^\t]+)\t.*#--- a/$1#o;
+	    s#^\Q+++\E $tmp_dir/[^/]+/([^\t]+)\t.*#+++ b/$1#o;
 	    print OUT $_;
 	}
 	close PIPE;
     }
 
     close OUT;
+
+    1;
+}
+
+exit;
+
+sub check_git_status
+{
+    open(IN, '-|', 'git status') or die $!;
+    my $status = join('', <IN>);
+    close IN;
+    my $is_clean = $status =~ /\nnothing to commit \(working directory clean\)/;
+    my($starting_branch) = $status =~ /^# On branch (.+)\n/;
+    ($status, $is_clean, $starting_branch);
+}
+
+sub usage
+{
+    die <<EOT;
+Usage: patch-update [OPTIONS]
+
+--gen[=DIR]   Include generated files.  Optional dest DIR overrides "patches".
+--skip-check  Skip the check that ensures starting with a clean branch.
+EOT
 }