a hook launched just before git creates the commit (aka .git/hooks/commit-msg)

commit-msg.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'raspell'

chars_count_min = 10
chars_count_max = 80

message_file    = ARGV[0]
first_line      = File.open(message_file, &:gets)

type_regex      = /^\[(.*)\] (.*)/
commit_types    = ["Dev" , "Pod" , "Mantis" , "Config"]

# Format attendu: "[Type de commit] Message simple et concis"

if !(first_line =~ type_regex)
  puts "Commit message should begin with [Type]"
  
  exit 1
end

# le type de commit doit être dans une liste prédéfinie
# sauf si c'est une mantis avec le numéro de la mantis
# TODO: verifier que pour "[Mantis ...]" le formatage est correct. 

type  = type_regex.match(first_line)[1]

if !(commit_types.include? type) && !(type =~ /Mantis/)
  puts "The type of this commit is unknown."
  puts "#{type} does not belong to #{commit_types}"
  
  exit 1
end

# la longueur de la première ligne doit inférieure à 80 caractères

if first_line.length > chars_count_max
  puts "Aborting commit due to commit message too long."
  puts "(must be less than #{chars_count_max} characters)"
  
  exit 1
end

# la longueur de la première ligne doit être supérieure à 10 caractères
  
if first_line.length < chars_count_min
  puts "Aborting commit due to commit message too short."
  puts "(must be more than #{chars_count_max} caracters)"
  
  exit 1
end

# pas de faute d'orthographe svp

to_check  = first_line
to_check  = to_check.gsub(/\[(.*)\]/, '')
to_check  = to_check.gsub(/`(.*)`/, '')
to_check  = to_check.gsub(/'(.*)'/, '')

speller   = Aspell.new("fr_FR")
wrongs    = Array.new

speller.suggestion_mode = Aspell::NORMAL

to_check.gsub(/[\w\']+/) do |word| 
  if !speller.check(word)     
    wrongs.push word
  end
end

if wrongs.length > 0
  wrongs.each do |word|
    puts "We don't know the word #{word}."
    puts "Maybe you meant #{speller.suggest(word).first}"
  end
  
  exit 1
end

install_aspell.sh

brew install aspell --with-lang-fr
sudo gem install raspell -- --with-opt-dir=/usr/local