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name : import-directories.perl #!/usr/bin/perl # # Copyright 2008-2009 Peter Krefting <peter@softwolves.pp.se> # # ------------------------------------------------------------------------ # # This program 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. # # This program 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 this program; if not, see <http://www.gnu.org/licenses/>. # # ------------------------------------------------------------------------ =pod =head1 NAME import-directories - Import bits and pieces to Git. =head1 SYNOPSIS B<import-directories.perl> F<configfile> F<outputfile> =head1 DESCRIPTION Script to import arbitrary projects version controlled by the "copy the source directory to a new location and edit it there"-version controlled projects into version control. Handles projects with arbitrary branching and version trees, taking a file describing the inputs and generating a file compatible with the L<git-fast-import(1)> format. =head1 CONFIGURATION FILE =head2 Format The configuration file is based on the standard I<.ini> format. ; Comments start with semi-colons [section] key=value Please see below for information on how to escape special characters. =head2 Global configuration Global configuration is done in the B<[config]> section, which should be the first section in the file. Configuration can be changed by repeating configuration sections later on. [config] ; configure conversion of CRLFs. "convert" means that all CRLFs ; should be converted into LFs (suitable for the core.autocrlf ; setting set to true in Git). "none" means that all data is ; treated as binary. crlf=convert =head2 Revision configuration Each revision that is to be imported is described in three sections. Revisions should be defined in topological order, so that a revision's parent has always been defined when a new revision is introduced. All the sections for one revision must be defined before defining the next revision. Each revision is assigned a unique numerical identifier. The numbers do not need to be consecutive, nor monotonically increasing. For instance, if your configuration file contains only the two revisions 4711 and 42, where 4711 is the initial commit, the only requirement is that 4711 is completely defined before 42. =pod =head3 Revision description section A section whose section name is just an integer gives meta-data about the revision. [3] ; author sets the author of the revisions author=Peter Krefting <peter@softwolves.pp.se> ; branch sets the branch that the revision should be committed to branch=master ; parent describes the revision that is the parent of this commit ; (optional) parent=1 ; merges describes a revision that is merged into this commit ; (optional; can be repeated) merges=2 ; selects one file to take the timestamp from ; (optional; if unspecified, the most recent file from the .files ; section is used) timestamp=3/source.c =head3 Revision contents section A section whose section name is an integer followed by B<.files> describe all the files included in this revision. If a file that was available previously is not included in this revision, it will be removed. If an on-disk revision is incomplete, you can point to files from a previous revision. There are no restrictions on where the source files are located, nor on their names. [3.files] ; the key is the path inside the repository, the value is the path ; as seen from the importer script. source.c=ver-3.00/source.c source.h=ver-2.99/source.h readme.txt=ver-3.00/introduction to the project.txt File names are treated as byte strings (but please see below on quoting rules), and should be stored in the configuration file in the encoding that should be used in the generated repository. =head3 Revision commit message section A section whose section name is an integer followed by B<.message> gives the commit message. This section is read verbatim, up until the beginning of the next section. As such, a commit message may not contain a line that begins with an opening square bracket ("[") and ends with a closing square bracket ("]"), unless they are surrounded by whitespace or other characters. [3.message] Implement foobar. ; trailing blank lines are ignored. =cut # Globals use strict; use warnings; use integer; my $crlfmode = 0; my @revs; my (%revmap, %message, %files, %author, %branch, %parent, %merges, %time, %timesource); my $sectiontype = 0; my $rev = 0; my $mark = 1; # Check command line if ($#ARGV < 1 || $ARGV[0] =~ /^--?h/) { exec('perldoc', $0); exit 1; } # Open configuration my $config = $ARGV[0]; open CFG, '<', $config or die "Cannot open configuration file \"$config\": "; # Open output my $output = $ARGV[1]; open OUT, '>', $output or die "Cannot create output file \"$output\": "; binmode OUT; LINE: while (my $line = <CFG>) { $line =~ s/\r?\n$//; next LINE if $sectiontype != 4 && $line eq ''; next LINE if $line =~ /^;/; my $oldsectiontype = $sectiontype; my $oldrev = $rev; # Sections if ($line =~ m"^\[(config|(\d+)(|\.files|\.message))\]$") { if ($1 eq 'config') { $sectiontype = 1; } elsif ($3 eq '') { $sectiontype = 2; $rev = $2; # Create a new revision die "Duplicate rev: $line\n " if defined $revmap{$rev}; print "Reading revision $rev\n"; push @revs, $rev; $revmap{$rev} = $mark ++; $time{$revmap{$rev}} = 0; } elsif ($3 eq '.files') { $sectiontype = 3; $rev = $2; die "Revision mismatch: $line\n " unless $rev == $oldrev; } elsif ($3 eq '.message') { $sectiontype = 4; $rev = $2; die "Revision mismatch: $line\n " unless $rev == $oldrev; } else { die "Internal parse error: $line\n "; } next LINE; } # Parse data if ($sectiontype != 4) { # Key and value if ($line =~ m"^\s*([^\s].*=.*[^\s])\s*$") { my ($key, $value) = &parsekeyvaluepair($1); # Global configuration if (1 == $sectiontype) { if ($key eq 'crlf') { $crlfmode = 1, next LINE if $value eq 'convert'; $crlfmode = 0, next LINE if $value eq 'none'; } die "Unknown configuration option: $line\n "; } # Revision specification if (2 == $sectiontype) { my $current = $revmap{$rev}; $author{$current} = $value, next LINE if $key eq 'author'; $branch{$current} = $value, next LINE if $key eq 'branch'; $parent{$current} = $value, next LINE if $key eq 'parent'; $timesource{$current} = $value, next LINE if $key eq 'timestamp'; push(@{$merges{$current}}, $value), next LINE if $key eq 'merges'; die "Unknown revision option: $line\n "; } # Filespecs if (3 == $sectiontype) { # Add the file and create a marker die "File not found: $line\n " unless -f $value; my $current = $revmap{$rev}; ${$files{$current}}{$key} = $mark; my $time = &fileblob($value, $crlfmode, $mark ++); # Update revision timestamp if more recent than other # files seen, or if this is the file we have selected # to take the time stamp from using the "timestamp" # directive. if ((defined $timesource{$current} && $timesource{$current} eq $value) || $time > $time{$current}) { $time{$current} = $time; } } } else { die "Parse error: $line\n "; } } else { # Commit message my $current = $revmap{$rev}; if (defined $message{$current}) { $message{$current} .= "\n"; } $message{$current} .= $line; } } close CFG; # Start spewing out data for git-fast-import foreach my $commit (@revs) { # Progress print OUT "progress Creating revision $commit\n"; # Create commit header my $mark = $revmap{$commit}; # Branch and commit id print OUT "commit refs/heads/", $branch{$mark}, "\nmark :", $mark, "\n"; # Author and timestamp die "No timestamp defined for $commit (no files?)\n" unless defined $time{$mark}; print OUT "committer ", $author{$mark}, " ", $time{$mark}, " +0100\n"; # Commit message die "No message defined for $commit\n" unless defined $message{$mark}; my $message = $message{$mark}; $message =~ s/\n$//; # Kill trailing empty line print OUT "data ", length($message), "\n", $message, "\n"; # Parent and any merges print OUT "from :", $revmap{$parent{$mark}}, "\n" if defined $parent{$mark}; if (defined $merges{$mark}) { foreach my $merge (@{$merges{$mark}}) { print OUT "merge :", $revmap{$merge}, "\n"; } } # Output file marks print OUT "deleteall\n"; # start from scratch foreach my $file (sort keys %{$files{$mark}}) { print OUT "M 644 :", ${$files{$mark}}{$file}, " $file\n"; } print OUT "\n"; } # Create one file blob sub fileblob { my ($filename, $crlfmode, $mark) = @_; # Import the file print OUT "progress Importing $filename\nblob\nmark :$mark\n"; open FILE, '<', $filename or die "Cannot read $filename\n "; binmode FILE; my ($size, $mtime) = (stat(FILE))[7,9]; my $file; read FILE, $file, $size; close FILE; $file =~ s/\r\n/\n/g if $crlfmode; print OUT "data ", length($file), "\n", $file, "\n"; return $mtime; } # Parse a key=value pair sub parsekeyvaluepair { =pod =head2 Escaping special characters Key and value strings may be enclosed in quotes, in which case whitespace inside the quotes is preserved. Additionally, an equal sign may be included in the key by preceding it with a backslash. For example: "key1 "=value1 key2=" value2" key\=3=value3 key4=value=4 "key5""=value5 Here the first key is "key1 " (note the trailing white-space) and the second value is " value2" (note the leading white-space). The third key contains an equal sign "key=3" and so does the fourth value, which does not need to be escaped. The fifth key contains a trailing quote, which does not need to be escaped since it is inside a surrounding quote. =cut my $pair = shift; # Separate key and value by the first non-quoted equal sign my ($key, $value); if ($pair =~ /^(.*[^\\])=(.*)$/) { ($key, $value) = ($1, $2) } else { die "Parse error: $pair\n "; } # Unquote and unescape the key and value separately return (&unescape($key), &unescape($value)); } # Unquote and unescape sub unescape { my $string = shift; # First remove enclosing quotes. Backslash before the trailing # quote leaves both. if ($string =~ /^"(.*[^\\])"$/) { $string = $1; } # Second remove any backslashes inside the unquoted string. # For later: Handle special sequences like \t ? $string =~ s/\\(.)/$1/g; return $string; } __END__ =pod =head1 EXAMPLES B<import-directories.perl> F<project.import> =head1 AUTHOR Copyright 2008-2009 Peter Krefting E<lt>peter@softwolves.pp.se> This program 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. =cut