git-project-pull

#!/bin/bash

#  project-pull  -  E.B.Smith, December 2013

set -euo pipefail
IFS=$'\n'
scriptname=project-pull

function usage() {
cat 1>&2 <<USAGE
$scriptname

   Pulls the current project branch of each track project in the ~/.git-projects file.

Usage:  $scriptname  [ -h ] [ <branch> ]

   The '-h' option shows this help text and exits.

   If branch <branch> exists, pulls the named branch, otherwise pulls the current branch.

   Exit code 1 if a project was updated, 0 otherwise.

USAGE
}


configfile=~/.git-projects
export debugging=false
bSilent=false
newbranch=""


if [[ ${CLICOLOR:-0} == 1 && -t 1 ]]
then
    textBlue="\e[94m"
    textLightBlue="\e[36m"
    textDarkBlue="\e[1m\e[34m"
    textRed="\e[31m"
    textNormal="\e[0m"
else
    textBlue=""
    textLightBlue=""
    textDarkBlue=""
    textRed=""
    textNormal=""
fi


userpathlen=~
userpathlen=$((${#userpathlen}+1))
function leftTruncatePath() {
    local maxlength=$1
    local string="$2"

    string="${string:$userpathlen}"
    local length=${#string}
    if (( length <= maxlength ))
    then
        printf "%s" "${string}"
    else
        string="${string:(- $((maxlength-3)))}"
        printf "...%s" "${string}"
    fi
}

totalProjectCount=0
trackedProjectCount=0
dirtyProjectCount=0


function pullGitProjectGuts() {
    local status
    status=$(git status -sb)
    local path
    path=$(leftTruncatePath 46 "$(pwd)")
    local currentbranch
    currentbranch="$(git status -sb)"
    currentbranch="${currentbranch#*...}"
    # echo "Current branch: $currentbranch"
    printf "${textLightBlue}~/%-46s ${textBlue}%s${textNormal}\n" "${path}" "${status}" 1>&3
    local changes
    local result
    set +e
    changes=$(git fetch origin 2>&1)
    result=$?
    set -e
    if  (( result == 0 ))
    then
        changes=$(git -c color.ui=always merge --no-edit FETCH_HEAD 2>&1 || true)
        if [[ "$changes" != *"Already up"* ]]
        then
            (( dirtyProjectCount++ )) || true
            printf "${textNormal}%s\n" "$changes" 1>&3
        fi
        #(git clean -df || true)
        if (( ${#newbranch} != 0 ))
        then
            if [[ "$currentbranch" != "$newbranch" ]] && [[ -n $(git branch -a --list "*${newbranch}*") ]]
            then
                git checkout "$newbranch"
            fi
        fi
    else
        printf "${textRed}>>> Warning: Can't pull path %s.${textNormal}\n" "$(pwd)" 1>&3
    fi
}


function pullGitProjects() {
    while read -r nextline
    do {
        (( totalProjectCount++ )) || true
        local nextpref="${nextline%%:*}"
        local nextpath="${nextline#*:}"

        if [[ "$nextpref" = "Y" ]]
        then
            (( trackedProjectCount++ )) || true
            if [ -d "${nextpath}" ]
            then
               cd "$(dirname "${nextpath}")"
               pullGitProjectGuts
            else
                printf "${textRed}>>> No path for %s.${textNormal}\n" "${nextpath}" 1>&3
            fi
        fi
    } </dev/null
    done < "${configfile}"
}


# Parse arguments --

if (( $# != 0 ))
then
    case $1 in
    "-h")  usage; exit 0 ;;
    *)   newbranch="$1" ;;
    esac
    shift
fi

if (( $# != 0 ))
then
    echo ">>> Error: Stray command line argument '$1'." 1>&2
    exit 1
fi

if $bSilent
then
    exec 3> /dev/null
else
    exec 3>&1
fi

pullGitProjects

printf "${textDarkBlue}Found $totalProjectCount projects, pulled $trackedProjectCount projects, $dirtyProjectCount projects updated.${textNormal}\n" 1>&3

if (( dirtyProjectCount > 0 ))
then
    exit 1
else
    exit 0
fi