Improved the usage message.

[rsync/rsync.git] / support / patch-update

diff --git a/support/patch-update b/support/patch-update
index 14360c1..502380d 100755 (executable)
--- a/support/patch-update
+++ b/support/patch-update
@@ -6,10 +6,35 @@
 # 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 ),
+    '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';
 
+unless ($skip_branch_check) {
+    open(IN, '-|', 'git status') or die $!;
+    my $status = join('', <IN>);
+    close IN;
+    die "The checkout is not clean:\n", $status unless $status =~ /\nnothing to commit \(working directory clean\)/;
+    die "The checkout is not on the master branch.\n" unless $status =~ /^# On branch master\n/;
+}
+
 my @extra_files;
 open(IN, '<', 'Makefile.in') or die "Couldn't open Makefile.in: $!\n";
 while (<IN>) {
@@ -23,13 +48,10 @@ 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;
 
@@ -78,11 +100,11 @@ foreach my $patch (@patches) {
 }
 
 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 master" and exit 1;
 
 exit;
 
@@ -110,7 +132,7 @@ sub update_patch
        system "git checkout --track -b patch/$patch origin/patch/$patch" and exit 1;
     }
 
-    open(OUT, '>', "patches/$patch.diff") or die $!;
+    open(OUT, '>', "$patches_dir/$patch.diff") or die $!;
     print OUT $description{$patch}, "\n";
 
     if (system("git rebase -m $parent") != 0) {
@@ -120,7 +142,7 @@ sub update_patch
     }
 
     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/" and exit 1;
     }
     $last_touch = time;
 
@@ -138,9 +160,12 @@ 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;
@@ -148,3 +173,15 @@ sub update_patch
 
     close OUT;
 }
+
+exit;
+
+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 master branch.
+EOT
+}