On Tue, Nov 27, 2012 at 12:43 AM, Eric S. Raymond <esr@xxxxxxxxxxx> wrote:
> -----------------------------------
> commit 1
> directory foo-1.1
>
> Release 1.1 of project foo
> .
> commit 2
> directory foo-1.2
>
> ..This is an example of a byte-stuffed line.
>
> Release 1.2 of project foo
> .
> commit 3
> directory foo-1.3
>
> Release 1.3 of project foo
> .
> -----------------------------------
>
> The main objective of the logfile design is to make hand-crafting
> these easy.
Here's another version with YAML:
---
-
author: &me Felipe Contreras <felipe.contreras@xxxxxxxxx>
date: 2011-1-1
msg: one
- tag v0.1
-
author: *me
date: 2011-1-2
msg: extra
-
author: *me
date: 2011-1-3
msg: |
with
spaces
-
author: *me
date: 2011-1-4
msg: |
dot
.
-
author: *me
date: 2011-1-5
msg: remove
ref: remove
- checkout devel
-
author: *me
date: 2011-1-6
msg: dev
- checkout master
-
author: *me
date: 2011-1-7
msg: bump
- tag v0.2
- checkout test remove
---
I believe that log file is much more human readable. Yet I still fail
to see why would anybody want so much detail only to import tarballs.
diff --git a/contrib/weave/git-weave b/contrib/weave/git-weave
new file mode 100755
index 0000000..646aeaa
--- /dev/null
+++ b/contrib/weave/git-weave
@@ -0,0 +1,234 @@
+#!/usr/bin/env ruby
+
+require 'optparse'
+require 'find'
+require 'fileutils'
+require 'yaml'
+
+$last = nil
+$branches = {}
+$branch = 'master'
+$refs = {}
+
+class Commit
+
+ attr_reader :id, :parents, :author, :committer, :date, :msg, :ref
+
+ @@num = 0
+
+ def initialize(args)
+ @id = @@num += 1
+ @parents = []
+ args.each do |key, value|
+ instance_variable_set("@#{key}", value)
+ end
+ if @author =~ /(.+ <.+>) (.+)/
+ @author = $1
+ end
+ if @committer =~ /(.+ <.+>) (.+)/
+ @committer = $1
+ @date = DateTime.strptime($2, '%s %z')
+ end
+ $refs[@ref] = @id if @ref
+ end
+
+end
+
+def export_commit(cmd, indir, out)
+
+ c = Commit.new(cmd)
+ $last = c.id
+
+ # commit
+ out.puts 'commit refs/heads/%s' % $branch
+ out.puts 'mark :%u' % c.id
+ if c.author and c.committer
+ out.puts 'author %s %s' % [c.author, c.date.strftime('%s %z')]
+ out.puts 'committer %s %s' % [c.committer, c.date.strftime('%s %z')]
+ else
+ out.puts 'committer %s %s' % [c.author, c.date.strftime('%s %z')]
+ end
+ out.puts 'data %u' % c.msg.bytesize
+ out.puts c.msg
+
+ # parents
+ c.parents.each_with_index do |p, i|
+ ref = $refs[p]
+ if i == 0
+ out.puts 'from :%u' % ref
+ else
+ out.puts 'merge :%u' % ref
+ end
+ end
+
+ # files
+ out.puts 'deleteall'
+ FileUtils.cd(File.join(indir, c.id.to_s)) do
+ Find.find('.') do |e|
+ next unless File.file?(e)
+ content = File.read(e)
+ filename = e.split(File::SEPARATOR).slice(1..-1).join(File::SEPARATOR)
+ if File.symlink?(e)
+ mode = '120000'
+ content = File.readlink(e)
+ else
+ mode = File.executable?(e) ? '100755' : '100644'
+ end
+ out.puts 'M %s inline %s' % [mode, filename]
+ out.puts 'data %u' % content.bytesize
+ out.puts content
+ end
+ end
+ out.puts
+
+end
+
+def do_reset(out, ref, from)
+ out.puts "reset %s" % ref
+ out.puts "from :%u" % from
+ out.puts
+end
+
+def export_reset(cmd, indir, out)
+ _, ref, from = cmd.split
+ do_reset(out, ref, from)
+end
+
+def export_checkout(cmd, indir, out)
+ _, $branch, from = cmd.split
+ from = ':%u' % $last if not $branches[$branch]
+ do_reset(out, 'refs/heads/%s' % $branch, from) if from
+ $branches[$branch] = true
+end
+
+def export_tag(cmd, indir, out)
+ _, tag = cmd.split
+ do_reset(out, 'refs/tags/%s' % tag, $last)
+end
+
+def export(indir = '.', out = STDOUT)
+
+ $branches['master'] = true
+
+ YAML.load_file(File.join(indir, 'log')).each do |e|
+ case e
+ when Hash
+ export_commit(e, indir, out)
+ when /^checkout /
+ export_checkout(e, indir, out)
+ when /^tag /
+ export_tag(e, indir, out)
+ when /^reset /
+ export_reset(e, indir, out)
+ end
+ end
+
+end
+
+def import(outdir, out)
+ format = 'format:commit %H%nauthor %an <%ae> %ad%ncommitter %cn
<%ce> %cd%nparents %P%n%n%B'
+ cmd = ['git', 'log', '-z', '-s', '--date=raw', '--format=%s' %
format, '--reverse', '--all']
+ commits = {}
+
+ cmds = []
+
+ IO.popen(cmd).each_with_index("\0") do |data, i|
+ @msg = nil
+ @parents = []
+ data.chomp("\0").each_line do |l|
+ if not @msg
+ case l
+ when /^commit (.+)$/
+ @id = $1
+ when /^author (.+)$/
+ @author = $1
+ when /^committer (.+)$/
+ @committer = $1
+ when /^parents (.+)$/
+ @parents = $1.split(" ")
+ when /^$/
+ @msg = ""
+ end
+ else
+ @msg << l
+ end
+ end
+
+ num = i + 1
+ commits[@id] = num
+
+ cmds << {
+ :author => @author,
+ :committer => @committer,
+ :msg => @msg,
+ :ref => num,
+ :parents => @parents.map { |e| commits[e] },
+ }
+
+ wd = File.join(outdir, num.to_s)
+ FileUtils.mkdir_p(wd)
+ system('git', '--work-tree', wd, 'checkout', '-f', '-q', @id)
+ end
+
+ IO.popen(['git', 'show-ref', '--tags', '--heads']).each do |e|
+ id, ref = e.chomp.split
+ cmds << 'reset %s %s' % [ref, commits[id]]
+ end
+
+ out.write(cmds.to_yaml)
+end
+
+def git_pack(indir, outdir)
+ indir = File.absolute_path(indir)
+ system('git', 'init', '--quiet', outdir)
+ FileUtils.cd(outdir) do
+ IO.popen(['git', 'fast-import', '--quiet'], 'w') do |io|
+ export(indir, io)
+ end
+ system('git', 'reset', '--quiet', '--hard')
+ end
+end
+
+def git_unpack(indir, outdir)
+ begin
+ FileUtils.mkdir_p(outdir)
+ log = File.open(File.join(outdir, 'log'), 'w')
+ ENV['GIT_DIR'] = File.join(indir, '.git')
+ oldref = %x[git symbolic-ref HEAD]
+ import(outdir, log)
+ ensure
+ system('git', 'symbolic-ref', 'HEAD', oldref) if oldref
+ ENV.delete('GIT_DIR')
+ log.close if log
+ end
+end
+
+$indir = '.'
+
+begin
+ OptionParser.new do |opts|
+ opts.on('-x') do
+ $mode = 'unpack'
+ end
+ opts.on('-c') do
+ $mode = 'pack'
+ end
+ opts.on('-o', '--outdir DIR') do |v|
+ $outdir = v
+ end
+ opts.on('-i', '--indir DIR') do |v|
+ $indir = v
+ end
+ end.parse!
+rescue OptionParser::InvalidOption
+end
+
+$mode = File.exists?(File.join($indir, '.git')) ? 'unpack' : 'pack'
unless $mode
+$outdir = File.join($indir, $mode == 'pack' ? 'packed' : 'unpacked2')
unless $outdir
+
+case $mode
+when 'pack'
+ git_pack($indir, $outdir)
+when 'unpack'
+ git_unpack($indir, $outdir)
+end
--
Felipe Contreras
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