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pre-commit.sh

#!/bin/sh
RED=$(tput setaf 1)
GREEN=$(tput setaf 2)
NORMAL=$(tput sgr0)

function check_master() {
    printf "Checking to see if this is the master branch… "
    # CONSTANT(S)
    BRANCH_PATTERN="^# On branch ([^${IFS}]*)"
    # Get status w/current branch
    git_status=$(git status 2> /dev/null)
    # Get current branch name
    if [[ ${git_status} =~ ${BRANCH_PATTERN} ]]; then
      branch_name=${BASH_REMATCH[1]}
    fi

    if [[ "$branch_name" == "master" ]]; then
      printf "${RED}✘ `whoami`, no! You should not commit to the master branch!${NORMAL}\n"
      exit 1
    fi
    printf "${GREEN}✔ Yep, you're not on the master branch.${NORMAL}\n"
}

function check_javascript(){
    if has_jshint && has_jshintconfig; then
        has_javascript_modifications=$(git status  -sb |grep  -E "^(A|M).*\.js"|awk '{split($0,a,/\ +/);print a[2]}')
        if [[ -n "$has_javascript_modifications" ]]; then
            echo "Checking to ensure your Javascript changes are awesome…"
            for f in $has_javascript_modifications
            do
                echo "Scanning: $f"
                jshint $f
                if [[ $? != 0 ]]; then
                    printf "${RED}✘ Please address the errors with '$f' before continuing with the commit ${NORMAL}\n"
                    exit 1
                 fi
            done
            printf "${GREEN}✔ Congrats! Your Javascript would make Crockford proud!${NORMAL}\n"
        fi
    else
        printf "${RED}✘ Since you're missing part of the jsHint set-up, we'll skip that for now${NORMAL}\n"
    fi
}

function has_jshint() {
    printf "Checking for jshint… "
    if [[ -z `which jshint` ]]; then
        echo """
Whoa there partner, looks like you're missing a jsHint from your toolbelt.
To install jshint, you'll need to install: 'node', 'npm', and then you can run:
    npm -g install jshint
After that, anytime you make changes to a Javascript file, we'll check to make
sure that everything looks good.
"""
        return 1
    fi
    printf "${GREEN}✔ Found jsHint${NORMAL}\n"
    return 0
}

function has_jshintconfig(){
    printf "Checking for jshint config… "
    if [[ ! -a '.jshintrc' ]]; then
        printf "${RED}✘  Looks like you're missing the .jshintrc config file.${NORMAL}\n"
        return 1
    fi
    printf "${GREEN}✔ Found jsHint config${NORMAL}\n"
    return 0
}


function check_sass(){
    if [[ -a `which sass-convert` ]]; then
        has_scss_modifications=$(git status  -sb |grep  -E "^(A|M).*\.(scss|sass)"|awk '{split($0,a,/\ +/);print a[2]}')
        if [[ -n "$has_scss_modifications" ]]; then
            echo "Checking to ensure your Sass changes are totally rad…"
            for f in $has_scss_modifications
            do
                echo "Sass cleaning: $f"
                sass-convert -F scss -T scss -i $f
                git add $f
                if [[ $? != 0 ]]; then
                    printf "${RED}✘ Hrmmm… Looks like we found an error with '$f'\nPlease address the error(s) before continuing with the commit ${NORMAL}\n\n"
                    exit 1
                 fi
            done
            printf "${GREEN}✔ Congrats! You've written some sassy Sass!${NORMAL}\n\n"

        fi
    fi
}

# Run it
check_master
check_javascript
check_sass