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Diffstat (limited to 'contrib/clmerge.in')
| -rwxr-xr-x | contrib/clmerge.in | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/contrib/clmerge.in b/contrib/clmerge.in new file mode 100755 index 0000000..f2163e5 --- /dev/null +++ b/contrib/clmerge.in @@ -0,0 +1,164 @@ +#! @PERL@ + +# Copyright (C) 1995-2005 The Free Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2, or (at your option) +# any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# Merge conflicted ChangeLogs +# tromey Mon Aug 15 1994 + +# Usage is: +# +# cl-merge [-i] file ... +# +# With -i, it works in place (backups put in a ~ file). Otherwise the +# merged ChangeLog is printed to stdout. + +# Please report any bugs to me. I wrote this yesterday, so there are no +# guarantees about its performance. I recommend checking its output +# carefully. If you do send a bug report, please include the failing +# ChangeLog, so I can include it in my test suite. +# +# Tom +# --- +# tromey@busco.lanl.gov Member, League for Programming Freedom +# Sadism and farce are always inexplicably linked. +# -- Alexander Theroux + + +# Month->number mapping. Used for sorting. +%months = ('Jan', 0, + 'Feb', 1, + 'Mar', 2, + 'Apr', 3, + 'May', 4, + 'Jun', 5, + 'Jul', 6, + 'Aug', 7, + 'Sep', 8, + 'Oct', 9, + 'Nov', 10, + 'Dec', 11); + +# If '-i' is given, do it in-place. +if ($ARGV[0] eq '-i') { + shift (@ARGV); + $^I = '~'; +} + +$lastkey = ''; +$lastval = ''; +$conf = 0; +%conflist = (); + +$tjd = 0; + +# Simple state machine. The states: +# +# 0 Not in conflict. Just copy input to output. +# 1 Beginning an entry. Next non-blank line is key. +# 2 In entry. Entry beginner transitions to state 1. +while (<>) { + if (/^<<<</ || /^====/) { + # Start of a conflict. + + # Copy last key into array. + if ($lastkey ne '') { + $conflist{$lastkey} = $lastval; + + $lastkey = ''; + $lastval = ''; + } + + $conf = 1; + } elsif (/^>>>>/) { + # End of conflict. Output. + + # Copy last key into array. + if ($lastkey ne '') { + $conflist{$lastkey} = $lastval; + + $lastkey = ''; + $lastval = ''; + } + + foreach (reverse sort clcmp keys %conflist) { + print STDERR "doing $_" if $tjd; + print $_; + print $conflist{$_}; + } + + $lastkey = ''; + $lastval = ''; + $conf = 0; + %conflist = (); + } elsif ($conf == 1) { + # Beginning an entry. Skip empty lines. Error if not a real + # beginner. + if (/^$/) { + # Empty line; just skip at this point. + } elsif (/^[MTWFS]/) { + # Looks like the name of a day; assume opener and move to + # "in entry" state. + $lastkey = $_; + $conf = 2; + print STDERR "found $_" if $tjd; + } else { + die ("conflict crosses entry boundaries: $_"); + } + } elsif ($conf == 2) { + # In entry. Copy into variable until we see beginner line. + if (/^[MTWFS]/) { + # Entry beginner line. + + # Copy last key into array. + if ($lastkey ne '') { + $conflist{$lastkey} = $lastval; + + $lastkey = ''; + $lastval = ''; + } + + $lastkey = $_; + print STDERR "found $_" if $tjd; + $lastval = ''; + } else { + $lastval .= $_; + } + } else { + # Just copy. + print; + } +} + +# Compare ChangeLog time strings like <=>. +# +# 0 1 2 3 +# Thu Aug 11 13:22:42 1994 Tom Tromey (tromey@creche.colorado.edu) +# 0123456789012345678901234567890 +# +sub clcmp { + # First check year. + $r = substr ($a, 20, 4) <=> substr ($b, 20, 4); + + # Now check month. + $r = $months{substr ($a, 4, 3)} <=> $months{substr ($b, 4, 3)} if !$r; + + # Now check day. + $r = substr ($a, 8, 2) <=> substr ($b, 8, 2) if !$r; + + # Now check time (3 parts). + $r = substr ($a, 11, 2) <=> substr ($b, 11, 2) if !$r; + $r = substr ($a, 14, 2) <=> substr ($b, 14, 2) if !$r; + $r = substr ($a, 17, 2) <=> substr ($b, 17, 2) if !$r; + + $r; +} |