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1 | #!/usr/bin/perl |
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2 | # These two should go upon release to make the script Perl 5.005 compatible |
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3 | use strict; |
4 | use warnings; |
5 | |
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6 | =head1 NAME |
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7 | |
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8 | make_patchnum.pl - make patchnum |
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9 | |
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10 | =head1 SYNOPSIS |
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11 | |
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12 | miniperl make_patchnum.pl |
13 | |
14 | perl make_patchnum.pl |
15 | |
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16 | =head1 DESCRIPTION |
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17 | |
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18 | This program creates the files holding the information |
19 | about locally applied patches to the source code. The created |
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20 | files are C<git_version.h> and C<lib/Config_git.pl>. |
21 | |
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22 | =head2 C<lib/Config_git.pl> |
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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, |
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26 | although -V:git.\* will be uninformative without it. |
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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 |
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34 | |
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35 | Yves Orton, Kenichi Ishigaki, Max Maischein |
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36 | |
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37 | =head1 COPYRIGHT |
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38 | |
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39 | Same terms as Perl itself. |
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40 | |
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41 | =cut |
42 | |
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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 | |
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52 | BEGIN { |
53 | my $root="."; |
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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 $srcdir &&"; # activate backtick fragment |
61 | } |
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62 | while (!-e "$root/perl.c" and length($root)<100) { |
63 | if ($root eq '.') { |
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64 | $root=".."; |
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65 | } else { |
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66 | $root.="/.."; |
67 | } |
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68 | } |
69 | die "Can't find toplevel" if !-e "$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, '<', $file |
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77 | or die "Failed to open for read '$file':$!"; |
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78 | return do { local $/; <$fh> }; |
79 | } |
80 | |
81 | sub write_file { |
82 | my ($file, $content) = @_; |
83 | $file= path_to($file); |
84 | open my $fh, '>', $file |
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85 | or die "Failed to open for write '$file':$!"; |
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86 | print $fh $content; |
87 | close $fh; |
88 | } |
89 | |
90 | sub backtick { |
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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. |
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93 | my $command = shift; |
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94 | if (wantarray) { |
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95 | my @result= `$subcd $command`; |
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96 | #warn "$subcd $command: \$?=$?\n" if $?; |
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97 | print "#> $subcd $command ->\n @result\n" if !$? and $opt_v; |
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98 | chomp @result; |
99 | return @result; |
100 | } else { |
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101 | my $result= `$subcd $command`; |
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102 | $result="" if ! defined $result; |
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103 | warn "$subcd $command: \$?=$?\n" if $?; |
104 | print "#> $subcd $command ->\n $result\n" if !$? and $opt_v; |
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105 | chomp $result; |
106 | return $result; |
107 | } |
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108 | } |
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109 | |
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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; |
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114 | foreach my $file (@files) { |
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115 | if (read_file($file) ne $content{$file}) { |
116 | print "Updating $files\n"; |
117 | write_file($_,$content{$_}) for @files; |
118 | return 1; |
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119 | } |
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120 | } |
121 | print "Reusing $files\n"; |
122 | return 0; |
123 | } |
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124 | |
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125 | my $unpushed_commits = ' '; |
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126 | my ($read, $branch, $snapshot_created, $commit_id, $describe)= ("") x 5; |
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127 | my ($changed, $extra_info, $commit_title)= ("") x 3; |
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128 | |
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129 | if (my $patch_file= read_file(".patch")) { |
130 | ($branch, $snapshot_created, $commit_id, $describe) = split /\s+/, $patch_file; |
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131 | $extra_info = "git_snapshot_date='$snapshot_created'"; |
132 | $commit_title = "Snapshot of:"; |
133 | } |
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134 | elsif (-d "$srcdir/.git") { |
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135 | # git branch | awk 'BEGIN{ORS=""} /\*/ { print $2 }' |
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136 | ($branch) = map { /\* ([^(]\S*)/ ? $1 : () } backtick("git branch"); |
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137 | my ($remote,$merge); |
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138 | if (length $branch) { |
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139 | $merge= backtick("git config branch.$branch.merge"); |
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140 | $merge = "" unless $? == 0; |
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141 | $merge =~ s!^refs/heads/!!; |
142 | $remote= backtick("git config branch.$branch.remote"); |
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143 | $remote = "" unless $? == 0; |
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144 | } |
145 | $commit_id = backtick("git rev-parse HEAD"); |
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146 | $describe = backtick("git describe"); |
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147 | my $commit_created = backtick(qq{git log -1 --pretty="format:%ci"}); |
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148 | $extra_info = "git_commit_date='$commit_created'"; |
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149 | backtick("git diff --no-ext-diff --quiet --exit-code"); |
150 | $changed = $?; |
151 | unless ($changed) { |
152 | backtick("git diff-index --cached --quiet HEAD --"); |
153 | $changed = $?; |
154 | } |
155 | |
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156 | if (length $branch && length $remote) { |
157 | # git cherry $remote/$branch | awk 'BEGIN{ORS=","} /\+/ {print $2}' | sed -e 's/,$//' |
158 | my $unpushed_commit_list = |
159 | join ",", map { (split /\s/, $_)[1] } |
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160 | grep {/\+/} backtick("git cherry $remote/$merge"); |
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161 | # git cherry $remote/$branch | awk 'BEGIN{ORS="\t\\\\\n"} /\+/ {print ",\"" $2 "\""}' |
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162 | $unpushed_commits = |
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163 | join "", map { ',"'.(split /\s/, $_)[1]."\"\t\\\n" } |
164 | grep {/\+/} backtick("git cherry $remote/$merge"); |
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165 | if (length $unpushed_commits) { |
166 | $commit_title = "Local Commit:"; |
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167 | my $ancestor = backtick("git rev-parse $remote/$merge"); |
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168 | $extra_info = "$extra_info |
169 | git_ancestor='$ancestor' |
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170 | git_remote_branch='$remote/$merge' |
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171 | git_unpushed='$unpushed_commit_list'"; |
172 | } |
173 | } |
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174 | if ($changed) { |
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175 | $commit_title = "Derived from:"; |
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176 | } |
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177 | $commit_title ||= "Commit id:"; |
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178 | } |
179 | |
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180 | # we extract the filename out of the warning header, so dont mess with that |
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181 | write_files(<<"EOF_HEADER", <<"EOF_CONFIG"); |
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182 | /************************************************************************** |
183 | * WARNING: 'git_version.h' is automatically generated by make_patchnum.pl |
184 | * DO NOT EDIT DIRECTLY - edit make_patchnum.pl instead |
185 | ***************************************************************************/ |
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186 | @{[$describe ? "#define PERL_PATCHNUM \"$describe\"" : ()]} |
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187 | #define PERL_GIT_UNPUSHED_COMMITS\t\t\\ |
188 | $unpushed_commits/*leave-this-comment*/ |
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189 | @{[$changed ? "#define PERL_GIT_UNCOMMITTED_CHANGES" : ()]} |
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190 | EOF_HEADER |
191 | ###################################################################### |
192 | # WARNING: 'lib/Config_git.pl' is generated by make_patchnum.pl |
193 | # DO NOT EDIT DIRECTLY - edit make_patchnum.pl instead |
194 | ###################################################################### |
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195 | \$Config::Git_Data=<<'ENDOFGIT'; |
196 | git_commit_id='$commit_id' |
197 | git_describe='$describe' |
198 | git_branch='$branch' |
199 | git_uncommitted_changes='$changed' |
200 | git_commit_id_title='$commit_title' |
201 | $extra_info |
202 | ENDOFGIT |
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203 | EOF_CONFIG |
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204 | # ex: set ts=8 sts=4 sw=4 et ft=perl: |