#!/bin/bash                                                                                                                                                                                                                                              

if [ ${#@} -lt 2 ]; then
    echo "usage: $0 [your github token] [REST expression]"
    exit 1;
fi

GITHUB_TOKEN=$1
GITHUB_API_REST=$2

GITHUB_API_HEADER_ACCEPT="Accept: application/vnd.github.v3+json"

temp=`basename $0`
TMPFILE=`mktemp /tmp/${temp}.XXXXXX` || exit 1

function rest_call {
    curl -s $1 -H "${GITHUB_API_HEADER_ACCEPT}" -H "Authorization: token $GITHUB_TOKEN" >> $TMPFILE
}

# single page result-s (no pagination), have no Link: section, the grep result is empty                                                                                                                                                                  
last_page=`curl -s -I "https://api.github.com${GITHUB_API_REST}" -H "${GITHUB_API_HEADER_ACCEPT}" -H "Authorization: token $GITHUB_TOKEN" | grep '^Link:' | sed -e 's/^Link:.*page=//g' -e 's/>.*$//g'`

# does this result use pagination?                                                                                                                                                                                                                       
if [ -z "$last_page" ]; then
    # no - this result has only one page                                                                                                                                                                                                                 
    rest_call "https://api.github.com${GITHUB_API_REST}"
else
    # yes - this result is on multiple pages                                                                                                                                                                                                             
    for p in `seq 1 $last_page`; do
        rest_call "https://api.github.com${GITHUB_API_REST}?page=$p"
    done
fi

cat $TMPFILE