157 lines
3.4 KiB
Perl
157 lines
3.4 KiB
Perl
#!/usr/local/bin/perl
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# Merge conflicted ChangeLogs
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# tromey Mon Aug 15 1994
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# Due to popular demand, I'm posting my ChangeLog auto-merge tool. Run
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# this on your ChangeLog files when an update leaves them conflicted.
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# The code is appended.
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#
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# Usage is:
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#
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# cl-merge [-i] file ...
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#
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# With -i, it works in place (backups put in a ~ file). Otherwise the
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# merged ChangeLog is printed to stdout.
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#
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# Style comments are welcome. This is my third perl program ever.
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#
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# Please report any bugs to me. I wrote this yesterday, so there are no
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# guarantees about its performance. I recommend checking its output
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# carefully. If you do send a bug report, please includie the failing
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# ChangeLog, so I can include it in my test suite.
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#
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# Tom
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# ---
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# tromey@busco.lanl.gov Member, League for Programming Freedom
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# Sadism and farce are always inexplicably linked.
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# -- Alexander Theroux
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# If '-i' is given, do it in-place.
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if ($ARGV[0] eq '-i') {
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shift (@ARGV);
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$^I = '~';
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}
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$lastkey = '';
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$lastval = '';
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$conf = 0;
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%conflist = ();
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$tjd = 0;
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# Simple state machine. The states:
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#
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# 0 Not in conflict. Just copy input to output.
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# 1 Beginning an entry. Next non-blank line is key.
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# 2 In entry. Entry beginner transitions to state 1.
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while (<>) {
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if (/^<<<</ || /^====/) {
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# Start of a conflict.
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# Copy last key into array.
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if ($lastkey ne '') {
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$conflist{$lastkey} = $lastval;
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$lastkey = '';
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$lastval = '';
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}
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$conf = 1;
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} elsif (/^>>>>/) {
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# End of conflict. Output.
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# Copy last key into array.
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if ($lastkey ne '') {
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$conflist{$lastkey} = $lastval;
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$lastkey = '';
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$lastval = '';
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}
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foreach (reverse sort clcmp keys %conflist) {
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print STDERR "doing $_" if $tjd;
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print $_;
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print $conflist{$_};
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}
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$lastkey = '';
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$lastval = '';
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$conf = 0;
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%conflist = ();
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} elsif ($conf == 1) {
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# Beginning an entry. Skip empty lines. Error if not a real
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# beginner.
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if (/^$/) {
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# Empty line; just skip at this point.
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} elsif (/^[MTWFS]/) {
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# Looks like the name of a day; assume opener and move to
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# "in entry" state.
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$lastkey = $_;
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$conf = 2;
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print STDERR "found $_" if $tjd;
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} else {
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die ("conflict crosses entry boundaries: $_");
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}
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} elsif ($conf == 2) {
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# In entry. Copy into variable until we see beginner line.
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if (/^[MTWFS]/) {
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# Entry beginner line.
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# Copy last key into array.
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if ($lastkey ne '') {
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$conflist{$lastkey} = $lastval;
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$lastkey = '';
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$lastval = '';
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}
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$lastkey = $_;
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print STDERR "found $_" if $tjd;
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$lastval = '';
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} else {
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$lastval .= $_;
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}
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} else {
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# Just copy.
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print;
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}
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}
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%months = ('Jan', 0,
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'Feb', 1,
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'Mar', 2,
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'Apr', 3,
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'May', 4,
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'Jun', 5,
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'Jul', 6,
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'Aug', 7,
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'Sep', 8,
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'Oct', 9,
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'Nov', 10,
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'Dec', 11);
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# Compare ChangeLog time strings like <=>.
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#
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# 0 1 2 3
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# Thu Aug 11 13:22:42 1994 Tom Tromey (tromey@creche.colorado.edu)
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# 0123456789012345678901234567890
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#
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sub clcmp {
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# First check year.
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$r = substr ($a, 20, 4) <=> substr ($b, 20, 4);
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# Now check month.
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$r = $months{$a} <=> $months{$b} if !$r;
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# Now check day.
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$r = substr ($a, 8, 2) <=> substr ($b, 8, 2) if !$r;
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# Now check time (3 parts).
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$r = substr ($a, 11, 2) <=> substr ($b, 11, 2) if !$r;
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$r = substr ($a, 14, 2) <=> substr ($b, 14, 2) if !$r;
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$r = substr ($a, 17, 2) <=> substr ($b, 17, 2) if !$r;
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$r;
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}
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