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<xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
author HackBot
date Sat, 14 May 2016 14:54:38 +0000
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8044:711c038a7dce 8045:a16537d2fe07
1 #!/usr/bin/perl
2 # These two should go upon release to make the script Perl 5.005 compatible
3 use strict;
4 use warnings;
5
6 =head1 NAME
7
8 make_patchnum.pl - make patchnum
9
10 =head1 SYNOPSIS
11
12 miniperl make_patchnum.pl
13
14 perl make_patchnum.pl
15
16 =head1 DESCRIPTION
17
18 This program creates the files holding the information
19 about locally applied patches to the source code. The created
20 files are F<git_version.h> and F<lib/Config_git.pl>.
21
22 =head2 F<lib/Config_git.pl>
23
24 Contains status information from git in a form meant to be processed
25 by the tied hash logic of Config.pm. It is actually optional,
26 although -V:git.\* will be uninformative without it.
27
28 C<git_version.h> contains similar information in a C header file
29 format, designed to be used by patchlevel.h. This file is obtained
30 from stock_git_version.h if miniperl is not available, and then
31 later on replaced by the version created by this script.
32
33 =head1 AUTHOR
34
35 Yves Orton, Kenichi Ishigaki, Max Maischein
36
37 =head1 COPYRIGHT
38
39 Same terms as Perl itself.
40
41 =cut
42
43 # from a -Dmksymlink target dir, I need to cd to the git-src tree to
44 # use git (like script does). Presuming that's not unique, one fix is
45 # to follow Configure's symlink-path to run git. Maybe GIT_DIR or
46 # path-args can solve it, if so we should advise here, I tried only
47 # very briefly ('cd -' works too).
48
49 my ($subcd, $srcdir);
50 our $opt_v = scalar grep $_ eq '-v', @ARGV;
51
52 BEGIN {
53 my $root=".";
54 # test 1st to see if we're a -Dmksymlinks target dir
55 $subcd = '';
56 $srcdir = $root;
57 if (-l "./Configure") {
58 $srcdir = readlink("./Configure");
59 $srcdir =~ s/Configure//;
60 $subcd = "cd $srcdir &&"; # activate backtick fragment
61 }
62 while (!-e "$root/perl.c" and length($root)<100) {
63 if ($root eq '.') {
64 $root="..";
65 } else {
66 $root.="/..";
67 }
68 }
69 die "Can't find toplevel" if !-e "$root/perl.c";
70 sub path_to { "$root/$_[0]" } # use $_[0] if this'd be placed in toplevel.
71 }
72
73 sub read_file {
74 my $file = path_to(@_);
75 return "" unless -e $file;
76 open my $fh, '<', $file
77 or die "Failed to open for read '$file':$!";
78 return do { local $/; <$fh> };
79 }
80
81 sub write_file {
82 my ($file, $content) = @_;
83 $file= path_to($file);
84 open my $fh, '>', $file
85 or die "Failed to open for write '$file':$!";
86 print $fh $content;
87 close $fh;
88 }
89
90 sub backtick {
91 # only for git. If we're in a -Dmksymlinks build-dir, we need to
92 # cd to src so git will work . Probably a better way.
93 my $command = shift;
94 if (wantarray) {
95 my @result= `$subcd $command`;
96 #warn "$subcd $command: \$?=$?\n" if $?;
97 print "#> $subcd $command ->\n @result\n" if !$? and $opt_v;
98 chomp @result;
99 return @result;
100 } else {
101 my $result= `$subcd $command`;
102 $result="" if ! defined $result;
103 #warn "$subcd $command: \$?=$?\n" if $?;
104 print "#> $subcd $command ->\n $result\n" if !$? and $opt_v;
105 chomp $result;
106 return $result;
107 }
108 }
109
110 sub write_files {
111 my %content= map { /WARNING: '([^']+)'/ || die "Bad mojo!"; $1 => $_ } @_;
112 my @files= sort keys %content;
113 my $files= join " and ", map { "'$_'" } @files;
114 foreach my $file (@files) {
115 if (read_file($file) ne $content{$file}) {
116 print "Updating $files\n";
117 write_file($_,$content{$_}) for @files;
118 return 1;
119 }
120 }
121 print "Reusing $files\n";
122 return 0;
123 }
124
125 my $unpushed_commits = ' ';
126 my ($read, $branch, $snapshot_created, $commit_id, $describe)= ("") x 5;
127 my ($changed, $extra_info, $commit_title)= ("") x 3;
128
129 if (my $patch_file= read_file(".patch")) {
130 ($branch, $snapshot_created, $commit_id, $describe) = split /\s+/, $patch_file;
131 $extra_info = "git_snapshot_date='$snapshot_created'";
132 $commit_title = "Snapshot of:";
133 }
134 elsif (-d "$srcdir/.git") {
135 # git branch | awk 'BEGIN{ORS=""} /\*/ { print $2 }'
136 ($branch) = map { /\* ([^(]\S*)/ ? $1 : () } backtick("git branch");
137 $branch //= "";
138 my ($remote,$merge);
139 if (length $branch) {
140 $merge= backtick("git config branch.$branch.merge");
141 $merge = "" unless $? == 0;
142 $merge =~ s!^refs/heads/!!;
143 $remote= backtick("git config branch.$branch.remote");
144 $remote = "" unless $? == 0;
145 }
146 $commit_id = backtick("git rev-parse HEAD");
147 $describe = backtick("git describe");
148 my $commit_created = backtick(qq{git log -1 --pretty="format:%ci"});
149 $extra_info = "git_commit_date='$commit_created'";
150 backtick("git diff --no-ext-diff --quiet --exit-code");
151 $changed = $?;
152 unless ($changed) {
153 backtick("git diff-index --cached --quiet HEAD --");
154 $changed = $?;
155 }
156
157 if (length $branch && length $remote) {
158 # git cherry $remote/$branch | awk 'BEGIN{ORS=","} /\+/ {print $2}' | sed -e 's/,$//'
159 my $unpushed_commit_list =
160 join ",", map { (split /\s/, $_)[1] }
161 grep {/\+/} backtick("git cherry $remote/$merge");
162 # git cherry $remote/$branch | awk 'BEGIN{ORS="\t\\\\\n"} /\+/ {print ",\"" $2 "\""}'
163 $unpushed_commits =
164 join "", map { ',"'.(split /\s/, $_)[1]."\"\t\\\n" }
165 grep {/\+/} backtick("git cherry $remote/$merge");
166 if (length $unpushed_commits) {
167 $commit_title = "Local Commit:";
168 my $ancestor = backtick("git rev-parse $remote/$merge");
169 $extra_info = "$extra_info
170 git_ancestor='$ancestor'
171 git_remote_branch='$remote/$merge'
172 git_unpushed='$unpushed_commit_list'";
173 }
174 }
175 if ($changed) {
176 $commit_title = "Derived from:";
177 }
178 $commit_title ||= "Commit id:";
179 }
180
181 # we extract the filename out of the warning header, so don't mess with that
182 write_files(<<"EOF_HEADER", <<"EOF_CONFIG");
183 /**************************************************************************
184 * WARNING: 'git_version.h' is automatically generated by make_patchnum.pl
185 * DO NOT EDIT DIRECTLY - edit make_patchnum.pl instead
186 ***************************************************************************/
187 @{[$describe ? "#define PERL_PATCHNUM \"$describe\"" : ()]}
188 #define PERL_GIT_UNPUSHED_COMMITS\t\t\\
189 $unpushed_commits/*leave-this-comment*/
190 @{[$changed ? "#define PERL_GIT_UNCOMMITTED_CHANGES" : ()]}
191 EOF_HEADER
192 ######################################################################
193 # WARNING: 'lib/Config_git.pl' is generated by make_patchnum.pl
194 # DO NOT EDIT DIRECTLY - edit make_patchnum.pl instead
195 ######################################################################
196 \$Config::Git_Data=<<'ENDOFGIT';
197 git_commit_id='$commit_id'
198 git_describe='$describe'
199 git_branch='$branch'
200 git_uncommitted_changes='$changed'
201 git_commit_id_title='$commit_title'
202 $extra_info
203 ENDOFGIT
204 EOF_CONFIG
205 # ex: set ts=8 sts=4 sw=4 et ft=perl: