[Emacs-diffs] Changes to emacs/lib-src/grep-changelog [lexbind]

[Miles Bader]

Index: emacs/lib-src/grep-changelog
diff -c /dev/null emacs/lib-src/grep-changelog:1.9.8.1
*** /dev/null   Tue Oct 14 19:59:24 2003
--- emacs/lib-src/grep-changelog        Tue Oct 14 19:59:13 2003
***************
*** 0 ****
--- 1,245 ----
+ #! /usr/bin/perl
+ 
+ # Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
+ #
+ # This file is part of GNU Emacs.
+ #
+ # GNU Emacs 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.
+ #
+ # GNU Emacs 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.
+ #
+ # You should have received a copy of the GNU General Public License
+ # along with GNU Emacs; see the file COPYING.  If not, write to the
+ # Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ # Boston, MA 02111-1307, USA.
+ 
+ 
+ # Extract entries from ChangeLogs matching specified criteria.
+ # Optionally format the resulting output to a form suitable for RCS
+ # logs, like they are used in Emacs, for example.  In this format,
+ # author lines, leading spaces, and file names are removed.
+ 
+ require 5;
+ use strict;
+ 
+ # Parse command line options.
+ 
+ use vars qw($author $regexp $exclude $from_date $to_date
+             $rcs_log $with_date $version $help $reverse
+             @entries);
+ 
+ use Getopt::Long;
+ my $result = GetOptions ("author=s" => \$author,
+                          "text=s"  => \$regexp,
+                          "exclude=s"  => \$exclude,
+                          "from-date=s" => \$from_date,
+                          "to-date=s" => \$to_date,
+                          "rcs-log" => \$rcs_log,
+                          "with-date" => \$with_date,
+                          "reverse!" => \$reverse,
+                          "version" => \$version,
+                          "help"    => \$help);
+ 
+ # If date options are specified, check that they have the format
+ # YYYY-MM-DD.
+ 
+ $result = 0 if $from_date && $from_date !~ /^\d\d\d\d-\d\d-\d\d$/;
+ $result = 0 if $to_date && $to_date !~ /^\d\d\d\d-\d\d-\d\d$/;
+ 
+ # Print usage information and exit when necessary.
+ 
+ if ($result == 0 || $help) {
+     print <<USAGE;
+ Usage: $0 [options] [CHANGELOG...]
+ Print entries in ChangeLogs matching various criteria.  Valid options
+ are
+ 
+   --author=AUTHOR         match entries whose author line matches
+                         regular expression AUTHOR
+   --text=TEXT             match entries whose text matches regular
+                         expression TEXT.
+   --exclude=TEXT        exclude entries matching TEXT.
+   --from-date=YYYY-MM-DD  match entries not older than given date
+   --to-date=YYYY-MM-DD    match entries not younger than given date
+   --rcs-log             format output suitable for RCS log entries.
+   --with-date           print short date line in RCS log
+   --reverse               show entries in reverse (chronological) order
+   --version             print version info
+   --help                print this help
+ 
+ If no CHANGELOG is specified scan the files "ChangeLog" and
+ "ChangeLog.[9-1]" in the current directory.  Old-style dates in ChangeLogs
+ are not recognized.
+ USAGE
+     exit $help ? 0 : 1;
+ }
+ 
+ # Print version info and exit if `--version' was specified.
+ 
+ if ($version) {
+     print "0.1\n";
+     exit 0;
+ }
+ 
+ 
+ # Value is non-zero if HEADER matches according to command line
+ # options specified, i.e. it matches $author, and its date is in
+ # the range $from_date <= date <= $to_date.
+ 
+ sub header_match_p ($) {
+     my $header = shift;
+ 
+     return 0 unless $header;
+ 
+     # No match if AUTHOR-regexp specified and doesn't match.
+     return 0 if $author && $header !~ /$author/;
+ 
+     # Check that the date of the entry matches if date options
+     # `--from-date' and/or `--to-date' were specified .  Old-style
+     # dates in ChangeLogs are not recognized, and never match.
+     if ($from_date || $to_date) {
+       if ($header =~ /^(\d\d\d\d-\d\d-\d\d)/) {
+           my $date = $1;
+           return 0 if $from_date && $date lt $from_date;
+           return 0 if $to_date && $date gt $to_date;
+       } else {
+           # Don't bother recognizing old-style dates.
+           return 0;
+       }
+     }
+ 
+     return 1;
+ }
+ 
+ 
+ # Value is non-zero if ENTRY matches the criteria specified on the
+ # command line, i.e. it matches $regexp, and it doesn't match
+ # $exclude.
+ 
+ sub entry_match_p ($) {
+     my $entry = shift;
+ 
+     return 0 unless $entry;
+ 
+     if ($regexp) {
+       return 1 if ($entry =~ /$regexp/
+                    && (!$exclude || $entry !~ $exclude));
+     } else {
+       return 1 if !$exclude || $entry !~ $exclude;
+     }
+ 
+     return 0;
+ }
+ 
+ 
+ # Print HEADER and/or ENTRY in a format suitable for what was
+ # specified on the command line.  If $rcs_log is specified, author
+ # lines are not printed, and leading spaces and file names are removed
+ # from ChangeLog entries.
+ 
+ sub print_log ($$) {
+     my ($header, $entry) = @_;
+     my $output = '';
+ 
+     if ($rcs_log) {
+       # Remove leading whitespace from entry.
+       $entry =~ s/^\s+//mg;
+       # Remove file name parts.
+       $entry =~ s/^\*.*\(/(/mg;
+       # Remove file name parts, 2.
+       $entry =~ s/^\*.*://mg;
+         if ($with_date) {
+           $header =~ /(\d\d\d\d-\d\d-\d\d)/;
+           $output = "!changelog-date $1\n";
+       }
+       $output .= $entry;
+     } else {
+       $output .= $header . $entry;
+     }
+ 
+     if ($reverse) {
+         push @entries, $output;
+     } else {
+         print $output;
+     }
+ }
+ 
+ # Scan LOG for matching entries, and print them to standard output.
+ 
+ sub parse_changelog ($) {
+     my $log = shift;
+     my $entry = undef;
+     my $header = undef;
+ 
+     @entries = () if $reverse;
+ 
+     # Open the ChangeLog.
+     open (IN, "< $log") || die "Cannot open $log: $!";
+ 
+     while (defined(my $line = <IN>)) {
+       if ($line =~ /^\S/) {
+           # Line is an author-line.  Print previous entry if
+           # it matches.
+           print_log ($header, $entry)
+               if header_match_p ($header) && entry_match_p ($entry);
+ 
+           $entry = "";
+           $header = $line;
+ 
+           # Add empty lines below the header.
+           while (defined($line = <IN>) && $line =~ /^\s*$/) {
+               $header = "$header$line";
+           }
+         }
+ 
+         last unless defined $line;
+ 
+       if ($line =~ /^\s*\*/) {
+           # LINE is the first line of a ChangeLog entry.  Print
+           # previous entry if it matches.
+           print_log ($header, $entry)
+               if header_match_p ($header) && entry_match_p ($entry);
+           $entry = $line;
+       } else {
+           # Add LINE to the current entry.
+           $entry = "$entry$line";
+       }
+     }
+ 
+     # Print last entry if it matches.
+     print_log ($header, $entry)
+       if header_match_p ($header) && entry_match_p ($entry);
+ 
+     close IN;
+ 
+     if ($reverse) {
+         while (defined (my $entry = pop @entries)) {
+             print $entry;
+         }
+     }
+ }
+ 
+ 
+ # Main program.  Process ChangeLogs.
+ 
+ # If files were specified on the command line, parse those files in the
+ # order supplied by the user; otherwise parse default files ChangeLog and
+ # ChangeLog.9...ChangeLog.1 according to $reverse.
+ unless (@ARGV > 0) {
+     @ARGV = ("ChangeLog", map {"ChangeLog.$_"} reverse 1..9);
+     @ARGV = reverse @ARGV if $reverse;
+ }
+ 
+ while (defined (my $log = shift @ARGV)) {
+     parse_changelog ($log) if -f $log;
+ }
+ 
+ 
+ # arch-tag: 9e4f6749-e053-4bb7-b3ad-11947318418e
+ # grep-changelog ends here.