Mercurial > repo
diff perl-5.22.2/make_patchnum.pl @ 8045:a16537d2fe07
<xfix> tar xf perl-5.22.2.tar.gz # Ah, whatever, I\'m doing it anyway
author | HackBot |
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date | Sat, 14 May 2016 14:54:38 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/perl-5.22.2/make_patchnum.pl Sat May 14 14:54:38 2016 +0000 @@ -0,0 +1,205 @@ +#!/usr/bin/perl +# These two should go upon release to make the script Perl 5.005 compatible +use strict; +use warnings; + +=head1 NAME + +make_patchnum.pl - make patchnum + +=head1 SYNOPSIS + + miniperl make_patchnum.pl + + perl make_patchnum.pl + +=head1 DESCRIPTION + +This program creates the files holding the information +about locally applied patches to the source code. The created +files are F<git_version.h> and F<lib/Config_git.pl>. + +=head2 F<lib/Config_git.pl> + +Contains status information from git in a form meant to be processed +by the tied hash logic of Config.pm. It is actually optional, +although -V:git.\* will be uninformative without it. + +C<git_version.h> contains similar information in a C header file +format, designed to be used by patchlevel.h. This file is obtained +from stock_git_version.h if miniperl is not available, and then +later on replaced by the version created by this script. + +=head1 AUTHOR + +Yves Orton, Kenichi Ishigaki, Max Maischein + +=head1 COPYRIGHT + +Same terms as Perl itself. + +=cut + +# from a -Dmksymlink target dir, I need to cd to the git-src tree to +# use git (like script does). Presuming that's not unique, one fix is +# to follow Configure's symlink-path to run git. Maybe GIT_DIR or +# path-args can solve it, if so we should advise here, I tried only +# very briefly ('cd -' works too). + +my ($subcd, $srcdir); +our $opt_v = scalar grep $_ eq '-v', @ARGV; + +BEGIN { + my $root="."; + # test 1st to see if we're a -Dmksymlinks target dir + $subcd = ''; + $srcdir = $root; + if (-l "./Configure") { + $srcdir = readlink("./Configure"); + $srcdir =~ s/Configure//; + $subcd = "cd $srcdir &&"; # activate backtick fragment + } + while (!-e "$root/perl.c" and length($root)<100) { + if ($root eq '.') { + $root=".."; + } else { + $root.="/.."; + } + } + die "Can't find toplevel" if !-e "$root/perl.c"; + sub path_to { "$root/$_[0]" } # use $_[0] if this'd be placed in toplevel. +} + +sub read_file { + my $file = path_to(@_); + return "" unless -e $file; + open my $fh, '<', $file + or die "Failed to open for read '$file':$!"; + return do { local $/; <$fh> }; +} + +sub write_file { + my ($file, $content) = @_; + $file= path_to($file); + open my $fh, '>', $file + or die "Failed to open for write '$file':$!"; + print $fh $content; + close $fh; +} + +sub backtick { + # only for git. If we're in a -Dmksymlinks build-dir, we need to + # cd to src so git will work . Probably a better way. + my $command = shift; + if (wantarray) { + my @result= `$subcd $command`; + #warn "$subcd $command: \$?=$?\n" if $?; + print "#> $subcd $command ->\n @result\n" if !$? and $opt_v; + chomp @result; + return @result; + } else { + my $result= `$subcd $command`; + $result="" if ! defined $result; + #warn "$subcd $command: \$?=$?\n" if $?; + print "#> $subcd $command ->\n $result\n" if !$? and $opt_v; + chomp $result; + return $result; + } +} + +sub write_files { + my %content= map { /WARNING: '([^']+)'/ || die "Bad mojo!"; $1 => $_ } @_; + my @files= sort keys %content; + my $files= join " and ", map { "'$_'" } @files; + foreach my $file (@files) { + if (read_file($file) ne $content{$file}) { + print "Updating $files\n"; + write_file($_,$content{$_}) for @files; + return 1; + } + } + print "Reusing $files\n"; + return 0; +} + +my $unpushed_commits = ' '; +my ($read, $branch, $snapshot_created, $commit_id, $describe)= ("") x 5; +my ($changed, $extra_info, $commit_title)= ("") x 3; + +if (my $patch_file= read_file(".patch")) { + ($branch, $snapshot_created, $commit_id, $describe) = split /\s+/, $patch_file; + $extra_info = "git_snapshot_date='$snapshot_created'"; + $commit_title = "Snapshot of:"; +} +elsif (-d "$srcdir/.git") { + # git branch | awk 'BEGIN{ORS=""} /\*/ { print $2 }' + ($branch) = map { /\* ([^(]\S*)/ ? $1 : () } backtick("git branch"); + $branch //= ""; + my ($remote,$merge); + if (length $branch) { + $merge= backtick("git config branch.$branch.merge"); + $merge = "" unless $? == 0; + $merge =~ s!^refs/heads/!!; + $remote= backtick("git config branch.$branch.remote"); + $remote = "" unless $? == 0; + } + $commit_id = backtick("git rev-parse HEAD"); + $describe = backtick("git describe"); + my $commit_created = backtick(qq{git log -1 --pretty="format:%ci"}); + $extra_info = "git_commit_date='$commit_created'"; + backtick("git diff --no-ext-diff --quiet --exit-code"); + $changed = $?; + unless ($changed) { + backtick("git diff-index --cached --quiet HEAD --"); + $changed = $?; + } + + if (length $branch && length $remote) { + # git cherry $remote/$branch | awk 'BEGIN{ORS=","} /\+/ {print $2}' | sed -e 's/,$//' + my $unpushed_commit_list = + join ",", map { (split /\s/, $_)[1] } + grep {/\+/} backtick("git cherry $remote/$merge"); + # git cherry $remote/$branch | awk 'BEGIN{ORS="\t\\\\\n"} /\+/ {print ",\"" $2 "\""}' + $unpushed_commits = + join "", map { ',"'.(split /\s/, $_)[1]."\"\t\\\n" } + grep {/\+/} backtick("git cherry $remote/$merge"); + if (length $unpushed_commits) { + $commit_title = "Local Commit:"; + my $ancestor = backtick("git rev-parse $remote/$merge"); + $extra_info = "$extra_info +git_ancestor='$ancestor' +git_remote_branch='$remote/$merge' +git_unpushed='$unpushed_commit_list'"; + } + } + if ($changed) { + $commit_title = "Derived from:"; + } + $commit_title ||= "Commit id:"; +} + +# we extract the filename out of the warning header, so don't mess with that +write_files(<<"EOF_HEADER", <<"EOF_CONFIG"); +/************************************************************************** +* WARNING: 'git_version.h' is automatically generated by make_patchnum.pl +* DO NOT EDIT DIRECTLY - edit make_patchnum.pl instead +***************************************************************************/ +@{[$describe ? "#define PERL_PATCHNUM \"$describe\"" : ()]} +#define PERL_GIT_UNPUSHED_COMMITS\t\t\\ +$unpushed_commits/*leave-this-comment*/ +@{[$changed ? "#define PERL_GIT_UNCOMMITTED_CHANGES" : ()]} +EOF_HEADER +###################################################################### +# WARNING: 'lib/Config_git.pl' is generated by make_patchnum.pl +# DO NOT EDIT DIRECTLY - edit make_patchnum.pl instead +###################################################################### +\$Config::Git_Data=<<'ENDOFGIT'; +git_commit_id='$commit_id' +git_describe='$describe' +git_branch='$branch' +git_uncommitted_changes='$changed' +git_commit_id_title='$commit_title' +$extra_info +ENDOFGIT +EOF_CONFIG +# ex: set ts=8 sts=4 sw=4 et ft=perl: