| Commit | Line | Data |
|---|
| 384f7be5 |
1 | #!/l/local/bin/perl -wspi.bak |
| 2 | |
| 3 | # |
| 4 | # reads a perforce style diff on stdin and outputs appropriate headers |
| 5 | # so the diff can be applied with the patch program |
| 6 | # |
| 7 | # Gurusamy Sarathy <gsar@umich.edu> |
| 8 | # |
| 9 | |
| 10 | BEGIN { |
| 11 | $0 =~ s|.*/||; |
| 12 | if ($h or $help) { |
| 13 | print STDERR <<USAGE; |
| 14 | Usage: $0 [-v] [-h] files |
| 15 | |
| 16 | -h print this help |
| 17 | -v output progress messages |
| 18 | |
| 19 | Does inplace edit of diff files output by the perforce commands |
| 20 | "p4 describe", "p4 diff", and "p4 diff2". The result is suitable |
| 21 | for feeding to the "patch" program. |
| 22 | |
| 23 | If no files are specified, reads from stdin and writes to stdout. |
| 24 | |
| 25 | WARNING: It only handles context or unified diffs. |
| 26 | |
| 27 | Example: p4 describe -du 123 | $0 > change-123.patch |
| 28 | |
| 29 | USAGE |
| 30 | exit(0); |
| 31 | } |
| 32 | unless (@ARGV) { @ARGV = '-'; undef $^I; } |
| 33 | use vars qw($thisfile $time $file $fnum $v $h $help); |
| 34 | $thisfile = ""; |
| 35 | $time = localtime(time); |
| 36 | } |
| 37 | |
| 38 | my ($cur, $match); |
| 39 | $cur = m<^==== //depot/(.+?)\#\d+.* ====$> ... m<^(\@\@.+\@\@|\*+)$>; |
| 40 | |
| 41 | $match = $1; |
| 42 | |
| 43 | if ($ARGV ne $thisfile) { |
| 44 | warn "processing patchfile [$ARGV]\n" unless $ARGV eq '-'; |
| 45 | $thisfile = $ARGV; |
| 46 | } |
| 47 | |
| 48 | # while we are within range |
| 49 | if ($cur) { |
| 50 | # set the file name after first line |
| 51 | if ($cur == 1) { |
| 52 | $file = $match; |
| 53 | $fnum++; |
| 54 | } |
| 55 | # emit the diff header when we hit last line |
| 56 | elsif ($cur =~ /E0$/) { |
| 57 | my $f = $file; |
| 58 | |
| 59 | # special hack for perl so we can always use "patch -p1" |
| 60 | $f =~ s<^.*?(perl.*?/)><$1>; |
| 61 | |
| 62 | # unified diff |
| 63 | if ($match =~ /^\@/) { |
| 64 | warn "emitting udiff header\n" if $v; |
| 65 | $_ = "Index: $f\n--- $f.~1~\t$time\n+++ $f\t$time\n$_"; |
| 66 | } |
| 67 | # context diff |
| 68 | elsif ($match =~ /^\*/) { |
| 69 | warn "emitting cdiff header\n" if $v; |
| 70 | $_ = "Index: $f\n*** $f.~1~\t$time\n--- $f\t$time\n$_"; |
| 71 | } |
| 72 | } |
| 73 | # see if we hit another patch (i.e. previous patch was empty) |
| 74 | elsif (m<^==== //depot/(.+?)\#\d+.* ====$>) { |
| 75 | $file = $match = $1; |
| 76 | } |
| 77 | # suppress all other lines in the header |
| 78 | else { |
| 79 | $_ = ""; |
| 80 | } |
| 81 | warn "file [$file] line [$cur] file# [$fnum]\n" if $v; |
| 82 | } |
| 83 | |
| 84 | $_ .= "End of Patch.\n" if eof; |
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