[PATCH v3 01/11] Add new git-cc-cmd helper to contrib

From

Felipe Contreras <felipe.contreras@gmail.com>

Date

Apr 19, 2013, 19:30 UTC

Message-ID

<1366399831-5964-2-git-send-email-felipe.contreras@gmail.com>

In-Reply-To

<1366399831-5964-1-git-send-email-felipe.contreras@gmail.com>

For example:

  % git cc-cmd 0001-remote-hg-trivial-cleanups.patch
  Felipe Contreras <felipe.contreras@gmail.com> (author: 100%)
  Jeff King <peff@peff.net> (signer: 83%)
  Max Horn <max@quendi.de> (signer: 16%)
  Junio C Hamano <gitster@pobox.com> (signer: 16%)

Thus it can be used for 'git send-email' as a cc-cmd.

Comments-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
---
 contrib/cc-cmd/git-cc-cmd | 131 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100755 contrib/cc-cmd/git-cc-cmd

diff --git a/contrib/cc-cmd/git-cc-cmd b/contrib/cc-cmd/git-cc-cmd
new file mode 100755
index 0000000..aa83a1a
--- /dev/null
+++ b/contrib/cc-cmd/git-cc-cmd
@@ -0,0 +1,131 @@
+#!/usr/bin/env ruby
+
+$since = '3-years-ago'
+$min_percent = 5
+
+class Commit
+
+  attr_reader :id, :roles
+
+  def initialize(id)
+    @id = id
+    @roles = []
+  end
+
+  def parse(data)
+    author = msg = nil
+    roles = {}
+    data.each_line do |line|
+      if not msg
+        case line
+        when /^author ([^<>]+) <(\S+)>$/
+          author = $1, $2
+          roles[author] = :author
+        when /^$/
+          msg = true
+        end
+      else
+        if line =~ /^(Signed-off|Reviewed|Acked)-by: ([^<>]+) <(\S+?)>$/
+          person = $2, $3
+          roles[person] = :signer if person != author
+        end
+      end
+    end
+    @roles = roles.map do |person, role|
+      [person, role]
+    end
+  end
+
+end
+
+class Commits
+
+  attr_reader :items
+
+  def initialize()
+    @items = {}
+  end
+
+  def size
+    @items.size
+  end
+
+  def import
+    return if @items.empty?
+    File.popen(%w[git cat-file --batch], 'r+') do |p|
+      p.write(@items.keys.join("\n"))
+      p.close_write
+      p.each do |l|
+        if l =~ /^(\h{40}) commit (\d+)/
+          id, len = $1, $2
+          data = p.read($2.to_i)
+          @items[id].parse(data)
+        end
+      end
+    end
+  end
+
+  def get_blame(source, start, offset, from)
+    return unless source
+    File.popen(['git', 'blame', '--incremental', '-C',
+               '-L', '%u,+%u' % [start, offset],
+               '--since', $since, from + '^',
+               '--', source]) do |p|
+      p.each do |line|
+        if line =~ /^(\h{40})/
+          id = $1
+          @items[id] = Commit.new(id)
+        end
+      end
+    end
+  end
+
+  def from_patch(file)
+    source = nil
+    from = nil
+    File.open(file) do |f|
+      f.each do |line|
+        case line
+        when /^From (\h+) (.+)$/
+          from = $1
+        when /^---\s+(\S+)/
+          source = $1 != '/dev/null' ? $1[2..-1] : nil
+        when /^@@\s-(\d+),(\d+)/
+          get_blame(source, $1, $2, from)
+        end
+      end
+    end
+  end
+
+end
+
+exit 1 if ARGV.size != 1
+
+commits = Commits.new
+commits.from_patch(ARGV[0])
+commits.import
+
+# hash of hashes
+persons = Hash.new { |hash, key| hash[key] = {} }
+
+commits.items.values.each do |commit|
+  commit.roles.each do |person, role|
+    persons[person][role] ||= 0
+    persons[person][role] += 1
+  end
+end
+
+persons.each do |person, roles|
+  roles = roles.map do |role, count|
+    percent = count.to_f * 100 / commits.size
+    next if percent < $min_percent
+    '%s: %u%%' % [role, percent]
+  end.compact
+  next if roles.empty?
+
+  name, email = person
+  # must quote chars?
+  name = '"%s"' % name if name =~ /[^\w \-]/i
+  person = name ? '%s <%s>' % [name, email] : email
+  puts '%s (%s)' % [person, roles.join(', ')]
+end

-- 
1.8.2.1.790.g4588561