Git Pre-Commit hook for coding standards validation

pre-commit.sh

#!/bin/bash

#--------------------------------------------------------------------------------------------------
# WARNING : due to a 'git stash save -u' command, check your .gitignore file before using this hook
#           -> http://blog.icefusion.co.uk/git-stash-can-delete-ignored-files-git-stash-u/
#--------------------------------------------------------------------------------------------------

binary="coke"
file=".coke"
files=""
stash=0
uid=$(date +"%Y%m%d%H%M%S")

#-----------------
# Output functions
#-----------------

function success
{
    if [ -n "$TERM" ]; then
        echo "[$(tput bold)$(tput setaf 2)SUCCESS$(tput sgr0)] $(tput setaf 6)$1$(tput sgr0)"
    else
        echo "[SUCCESS] $1"
    fi
    exit 0
}

function fail
{
    if [ -n "$TERM" ]; then
        echo "[$(tput bold)$(tput setaf 1)FAIL$(tput sgr0)] $(tput setaf 6)$1$(tput sgr0)"
    else
        echo "[FAIL] $1"
    fi
    exit 1
}

function warning
{
    if [ -n "$TERM" ]; then
        echo "[$(tput bold)$(tput setaf 3)WARNING$(tput sgr0)] $(tput setaf 6)$1$(tput sgr0)"
    else
        echo "[WARNING] $1"
    fi
}

#--------------------------
# Stash / unstash functions
#--------------------------

function stash
{
    if git stash save -u -k -q $uid
    then
        git stash list | grep "$uid" > /dev/null
        if [ $? -eq 0 ]
        then
            stash=1
        fi
    else
        fail "Unable to stash changes"
    fi
}

function unstash
{
    if [ "$stash" -eq 1 ]
    then
        git stash pop -q
        if [ $? -gt 0 ]
        then
            warning "Unable to revert stash command"
        fi
    fi
}

#-------------
# Check binary
#-------------

if [ ! -s $binary ]
then
    binary="bin/$binary"
    if [ ! -s $binary ]
    then
        binary="vendor/$binary"
        if [ ! -s $binary ]
        then
            warning "Can't find coke binary : \"coke\", \"bin/coke\", \"vendor/bin/coke\", aborting check"
            exit 1
        fi
    fi
fi

#-------------------------
# Check configuration file
#-------------------------

if [ ! -s $file ]
then
    warning "Can't find \".coke\" configuration file, aborting check"
    exit 1
fi

#----------------------------
# Stash to clean working tree
#----------------------------

STATUS_OUTPUT=$(git status --porcelain)

if echo "$STATUS_OUTPUT" | grep '^[MARCDU][MARCDU]' > /dev/null
then
    fail "Some files appears both in your staging area and your unadded files."
elif echo "$STATUS_OUTPUT" | grep '^ [MARCD]' > /dev/null
then
    stash
fi

#--------------------------------------------------------------------
# Pick files to verify (merge between git information and Coke lists)
#--------------------------------------------------------------------

cokePaths=$( grep "^[^\#][^\=]*$" $file )

for file in $(git status --porcelain | grep '^[MARC]' | colrm 1 3 | cut -f2 -d">")
do
    allowed=0

    for ligne in $cokePaths
    do
        if [ "${ligne:0:1}" = '!' ] && [[ "$file" == *"${ligne:1}"* ]]
        then
            continue 2
        elif [[ "$file" == "$ligne"* ]]
        then
            allowed=1
        fi
    done

    if [ "$allowed" -eq 1 ]
    then
        files="$files $file"
    fi
done

#----------------------
# No files to be verify
#----------------------

if [ ! -n "$files" ]
then
   warning "No files has been verified by Coke"
   unstash
   exit 0
fi

#---------------
# Coke execution
#---------------

$binary $files
CS_RESULT=$?

#------------------------------------------
# Unstash to retrieve original working tree
#------------------------------------------

unstash

#----------------
# Display results
#----------------

if [ $CS_RESULT -eq 1 ]
then
    fail "You must fix coding standards before commit"
fi

success  "Coding standards OK"