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29299e47 | 1 | #!/usr/bin/perl |
f22725be | 2 | # These two should go upon release to make the script Perl 5.005 compatible |
29299e47 YO |
3 | use strict; |
4 | use warnings; | |
5 | ||
786aaa25 | 6 | =head1 NAME |
8ed12dca | 7 | |
786aaa25 | 8 | make_patchnum.pl - make patchnum |
8ed12dca | 9 | |
786aaa25 | 10 | =head1 SYNOPSIS |
8ed12dca | 11 | |
6033099b MM |
12 | miniperl make_patchnum.pl |
13 | ||
14 | perl make_patchnum.pl | |
15 | ||
3f1788e1 | 16 | =head1 DESCRIPTION |
505afc73 | 17 | |
6033099b MM |
18 | This program creates the files holding the information |
19 | about locally applied patches to the source code. The created | |
505afc73 YO |
20 | files are C<git_version.h> and C<lib/Config_git.pl>. |
21 | ||
22 | =item C<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, | |
3f1788e1 | 26 | although -V:git.\* will be uninformative without it. |
505afc73 YO |
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 | |
6033099b | 34 | |
505afc73 | 35 | Yves Orton, Kenichi Ishigaki, Max Maischein |
6033099b | 36 | |
505afc73 | 37 | =head1 COPYRIGHT |
6033099b | 38 | |
505afc73 | 39 | Same terms as Perl itself. |
8ed12dca | 40 | |
786aaa25 KI |
41 | =cut |
42 | ||
3f1788e1 JC |
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 | ||
29299e47 YO |
52 | BEGIN { |
53 | my $root="."; | |
3f1788e1 JC |
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 $srcdir &&"; # activate backtick fragment | |
61 | } | |
29299e47 YO |
62 | while (!-e "$root/perl.c" and length($root)<100) { |
63 | if ($root eq '.') { | |
91c3081c | 64 | $root=".."; |
505afc73 | 65 | } else { |
91c3081c RGS |
66 | $root.="/.."; |
67 | } | |
29299e47 YO |
68 | } |
69 | die "Can't find toplevel" if !-e "$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, '<', $file | |
91c3081c | 77 | or die "Failed to open for read '$file':$!"; |
29299e47 YO |
78 | return do { local $/; <$fh> }; |
79 | } | |
80 | ||
81 | sub write_file { | |
82 | my ($file, $content) = @_; | |
83 | $file= path_to($file); | |
84 | open my $fh, '>', $file | |
91c3081c | 85 | or die "Failed to open for write '$file':$!"; |
29299e47 YO |
86 | print $fh $content; |
87 | close $fh; | |
88 | } | |
89 | ||
90 | sub backtick { | |
3f1788e1 JC |
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. | |
29299e47 | 93 | my $command = shift; |
eb5c076f | 94 | if (wantarray) { |
3f1788e1 JC |
95 | my @result= `$subcd $command`; |
96 | warn "$subcd $command: \$?=$?\n" if $?; | |
97 | print "#> $subcd $command ->\n @result\n" if !$? and $opt_v; | |
eb5c076f YO |
98 | chomp @result; |
99 | return @result; | |
100 | } else { | |
3f1788e1 | 101 | my $result= `$subcd $command`; |
eb5c076f | 102 | $result="" if ! defined $result; |
3f1788e1 JC |
103 | warn "$subcd $command: \$?=$?\n" if $?; |
104 | print "#> $subcd $command ->\n $result\n" if !$? and $opt_v; | |
eb5c076f YO |
105 | chomp $result; |
106 | return $result; | |
107 | } | |
29299e47 | 108 | } |
8ed12dca | 109 | |
eb5c076f YO |
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; | |
505afc73 | 114 | foreach my $file (@files) { |
eb5c076f YO |
115 | if (read_file($file) ne $content{$file}) { |
116 | print "Updating $files\n"; | |
117 | write_file($_,$content{$_}) for @files; | |
118 | return 1; | |
505afc73 | 119 | } |
eb5c076f YO |
120 | } |
121 | print "Reusing $files\n"; | |
122 | return 0; | |
123 | } | |
8ed12dca | 124 | |
786aaa25 | 125 | my $unpushed_commits = '/*no-op*/'; |
eb5c076f YO |
126 | my ($read, $branch, $snapshot_created, $commit_id, $describe)= ("") x 5; |
127 | my ($changed, $extra_info, $commit_title, $new_patchnum, $status)= ("") x 5; | |
3f1788e1 | 128 | |
eb5c076f YO |
129 | if (my $patch_file= read_file(".patch")) { |
130 | ($branch, $snapshot_created, $commit_id, $describe) = split /\s+/, $patch_file; | |
786aaa25 KI |
131 | $extra_info = "git_snapshot_date='$snapshot_created'"; |
132 | $commit_title = "Snapshot of:"; | |
133 | } | |
3f1788e1 | 134 | elsif (-d "$srcdir/.git") { |
786aaa25 | 135 | # git branch | awk 'BEGIN{ORS=""} /\*/ { print $2 }' |
3f1788e1 | 136 | ($branch) = map { /\* ([^(]\S*)/ ? $1 : () } backtick("git branch"); |
eb5c076f | 137 | my ($remote,$merge); |
786aaa25 | 138 | if (length $branch) { |
505afc73 | 139 | $merge= backtick("git config branch.$branch.merge"); |
eb5c076f YO |
140 | $merge =~ s!^refs/heads/!!; |
141 | $remote= backtick("git config branch.$branch.remote"); | |
786aaa25 KI |
142 | } |
143 | $commit_id = backtick("git rev-parse HEAD"); | |
b6194a9d | 144 | $describe = backtick("git describe"); |
786aaa25 KI |
145 | my $commit_created = backtick(qq{git log -1 --pretty="format:%ci"}); |
146 | $new_patchnum = "describe: $describe"; | |
147 | $extra_info = "git_commit_date='$commit_created'"; | |
148 | if (length $branch && length $remote) { | |
149 | # git cherry $remote/$branch | awk 'BEGIN{ORS=","} /\+/ {print $2}' | sed -e 's/,$//' | |
150 | my $unpushed_commit_list = | |
151 | join ",", map { (split /\s/, $_)[1] } | |
eb5c076f | 152 | grep {/\+/} backtick("git cherry $remote/$merge"); |
786aaa25 | 153 | # git cherry $remote/$branch | awk 'BEGIN{ORS="\t\\\\\n"} /\+/ {print ",\"" $2 "\""}' |
29299e47 | 154 | $unpushed_commits = |
eb5c076f YO |
155 | join "", map { ',"'.(split /\s/, $_)[1]."\"\t\\\n" } |
156 | grep {/\+/} backtick("git cherry $remote/$merge"); | |
786aaa25 KI |
157 | if (length $unpushed_commits) { |
158 | $commit_title = "Local Commit:"; | |
eb5c076f | 159 | my $ancestor = backtick("git rev-parse $remote/$merge"); |
786aaa25 KI |
160 | $extra_info = "$extra_info |
161 | git_ancestor='$ancestor' | |
eb5c076f | 162 | git_remote_branch='$remote/$merge' |
786aaa25 KI |
163 | git_unpushed='$unpushed_commit_list'"; |
164 | } | |
165 | } | |
3f1788e1 | 166 | if ($changed) { # not touched since init'd. never true. |
786aaa25 KI |
167 | $changed = 'true'; |
168 | $commit_title = "Derived from:"; | |
eb5c076f YO |
169 | $status='"uncommitted-changes"' |
170 | } else { | |
3f1788e1 | 171 | $status='/*clean-working-directory-maybe*/' |
786aaa25 | 172 | } |
eb5c076f | 173 | $commit_title ||= "Commit id:"; |
786aaa25 KI |
174 | } |
175 | ||
eb5c076f | 176 | # we extract the filename out of the warning header, so dont mess with that |
16ad9bfa | 177 | write_files(<<"EOF_HEADER", <<"EOF_CONFIG"); |
eb5c076f YO |
178 | /************************************************************************** |
179 | * WARNING: 'git_version.h' is automatically generated by make_patchnum.pl | |
180 | * DO NOT EDIT DIRECTLY - edit make_patchnum.pl instead | |
181 | ***************************************************************************/ | |
182 | #define PERL_GIT_UNCOMMITTED_CHANGES $status | |
183 | #define PERL_PATCHNUM "$describe" | |
184 | #define PERL_GIT_UNPUSHED_COMMITS\t\t\\ | |
185 | $unpushed_commits/*leave-this-comment*/ | |
186 | EOF_HEADER | |
187 | ###################################################################### | |
188 | # WARNING: 'lib/Config_git.pl' is generated by make_patchnum.pl | |
189 | # DO NOT EDIT DIRECTLY - edit make_patchnum.pl instead | |
190 | ###################################################################### | |
8ed12dca YO |
191 | \$Config::Git_Data=<<'ENDOFGIT'; |
192 | git_commit_id='$commit_id' | |
193 | git_describe='$describe' | |
194 | git_branch='$branch' | |
195 | git_uncommitted_changes='$changed' | |
196 | git_commit_id_title='$commit_title' | |
197 | $extra_info | |
198 | ENDOFGIT | |
eb5c076f | 199 | EOF_CONFIG |
91c3081c | 200 | # ex: set ts=8 sts=4 sw=4 et ft=perl: |