rgl2

#! /bin/bash

#
# rgl2 (remote-git-log): get git log information from a remote git repository 
# without having a local checked out version. Output in json format.
#

#
# Check the command line args
#
if [ $# -ne 3 ]; then
   echo "usage: rgl2 <host> <project> <file path>"
   echo "       supported hosts: github, gitlab, bitbucket"
   echo "           shortcuts: gh, gl, bb"
   echo "       example: rgl2 github openssl/openssl apps/info.c"
   echo "       example: rgl2 gitlab tortoisegit/tortoisegit LICENSE"
   echo "       example: rgl2 bitbucket swsc/lookup showCnt"
   exit 1
fi

host=$1
proj=$2
filepath=$3

#
# get the github API auth key(s) from ~/github-auth
#
if [ ! -f ~/github-auth ]; then
    echo Error: missing ~/github-auth file
    echo Error: missing ~/github-auth file >&2
    echo ~/github-auth must exists and contain github API auth key or keys >&2
    echo 'Create keys at github->Settings->Developer Settings->personal access tokens' >&2
    exit 1
fi
mapfile -t auth_array < ~/github-auth
len="${#auth_array[@]}"
i="$(($RANDOM % $len))"
auth=${auth_array[$i]}


#
# Functions
#

# format data from github 
function render_github {
    response="$1"
    echo "$response" | jq-linux64 -r '.[] | {commit: .sha}' | sed \
    -e '/^{/d'  \
    -e '/^}/d'  \
    -e 's/\"//g'  \
    -e 's/^  commit: //' 
}

# format data from gitlab 
function render_gitlab {
    response="$1"
    echo "$response" | jq-linux64 -r '{commit: .[].id}' | sed \
    -e '/^{/d'  \
    -e '/^}/d'  \
    -e 's/\"//g'  \
    -e 's/^  commit: //'
}

# format data from bitbucket 
function render_bitbucket {
    response="$1"
    echo "$response" | jq-linux64 -r '{commit: .values[].hash}' | sed \
    -e '/^{/d'  \
    -e '/^}/d'  \
    -e 's/\"//g'  \
    -e 's/^  commit: //'
}

#
# Main body of script
#
case $host in
    github|gh)
        empty='[

]'
        page=0
        while true; do
            page=$((page + 1))

            url="https://api.github.com/repos/$proj/commits?path=$filepath&per_page=100&page=$page"
            #echo $url
            response=$(curl -s -L -H "Authorization: token $auth" "$url")
            if [[ $response = *"rate limit exceeded"* ]]; then
                # wait minute then try again 
                sleep 60
                page=$((page - 1))
                continue
            elif [[ "$response" = "$empty" ]]; then
                echo ""
                break
            else
                commits=`render_github "$response"`
                # quick sanity check: make sure the first commit is a
                # valid sha1 hash (only check the first to save time)
                clen=`printf "%s\n" "$commits" | head -1 | wc -c`
                if [ $clen -ne 41 ]; then
                    echo ""
                    echo "Error: rgl2 returned invalid response"
                    exit 3
                fi
                printf "$commits\n"
            fi
        done
        ;;
    gitlab|gl)
        page=0
        while true; do
            page=$((page + 1))
            proj=`echo $proj | sed -e "s@/@%2F@"`
            filepath=`echo $filepath | sed -e "s@/@%2F@"`
            url="https://gitlab.com/api/v4/projects/$proj/repository/commits?path=$filepath&per_page=100&page=$page"
            #echo $url
            response=$(curl -s "$url")
            if [[ "$response" = "[]" ]]; then
                echo ""
                break
            else
                commits=`render_gitlab "$response"`
                # quick sanity check: make sure the first commit is a
                # valid sha1 hash (only check the first to save time)
                clen=`printf "%s\n" "$commits" | head -1 | wc -c`
                if [ $clen -ne 41 ]; then
                    echo ""
                    echo "Error: rgl2 returned invalid response"
                    exit 3
                fi
                printf "$commits\n"
            fi
        done
        ;;
    bitbucket|bb)
        page=0
        while true; do
            page=$((page + 1))
            url="https://api.bitbucket.org/2.0/repositories/$proj/commits/?path=$filepath&pagelen=100&page=$page"
            #echo "$url"
            response=$(curl -s "$url")
            end=`echo "$response" | jq-linux64 -r '{commit: .values[].hash}'`
            if [[ "$end" = "" ]]; then
                echo ""
                break
            else
                commits=`render_bitbucket "$response"`
                # quick sanity check: make sure the first commit is a
                # valid sha1 hash (only check the first to save time)
                clen=`printf "%s\n" "$commits" | head -1 | wc -c`
                if [ $clen -ne 41 ]; then
                    echo ""
                    echo "Error: rgl2 returned invalid response"
                    exit 3
                fi
                printf "$commits\n"
            fi
        done
        ;;
    *)
        echo "Error: $host not supported, must be one of github, gitlab, or bitbucket"
        exit 1
esac

exit 0