git-remote-add-centos: Add centos git repo for a package

README.md

git-remote-add-centos: Add centos remote for a package

This simply adds a remote to https://git.centos.org/ to an existing git repo.

Usage

Usage: git-remote-add-centos [options] [source] package

   Add remote repo for packagke on git.centos.org.

   source can be 'centos' or 'fedora'. Default is centos.

   options:
     -o | --name NAME   name the remote NAME (default = source)

Basically writes a remote config stanza like below and does a fetch:

[remote "NAME"]
    url = https://git.centos.org/rpms/PACKAGE.git
    fetch = +refs/heads/*:refs/remotes/SOURCE/*
    tagopt = --no-tags
    fetch = +refs/tags/*:refs/tags/SOURCE/*

git-remote-add-centos

#!/bin/sh
# git-remote-add-centos
# https://gist.github.com/smoser/319519224aac91d3057821e4898cec24

REMOVE_REMOTE=""
VERBOSITY=0
TEMP_D=""

error() { echo "$@" 1>&2; }
fail() { local r=$?;  [ $r -eq 0 ] && r=1; failrc "$r" "$@"; }
failrc() { local r=$1; shift; [ $# -eq 0 ] || error "$@"; exit $r; }

Usage() {
    cat <<EOF
Usage: ${0##*/} [options] [source] package

   Add remote repo for packagke on git.centos.org.

   source can be 'centos' or 'fedora'. Default is centos.

   options:
     -o | --name NAME   name the remote NAME (default = source)

Basically writes a remote config stanza like below and does a fetch:

[remote "NAME"]
	url = https://git.centos.org/rpms/PACKAGE.git
	fetch = +refs/heads/*:refs/remotes/SOURCE/*
	tagopt = --no-tags
	fetch = +refs/tags/*:refs/tags/SOURCE/*
EOF
}

bad_Usage() { Usage 1>&2; [ $# -eq 0 ] || error "$@"; return 1; }
cleanup() {
    if [ -n "$REMOVE_REMOTE" ]; then
        error "removing remote $REMOVE_REMOTE"
        git remote remove "$REMOVE_REMOTE"
    fi
    if [ -n "$TEMP_D" -a -d "$TEMP_D" ]; then
        rm -Rf "$TEMP_D"
    fi
}

debug() {
    local level=${1}; shift;
    [ "${level}" -gt "${VERBOSITY}" ] && return
    error "${@}"
}

shellquote() {
    # quote the arguments as appropriate for shell.
    local x="" wrap="" tickset=$'"!$' quoteset=" '*" tick="'" cmd=""
    for x in "$@"; do
        if [ "${x#*[${tickset}]}" != "$x" ]; then
            wrap="'"
            x=${x//$tick/$tick\\$tick$tick}
        elif [ "${x#*[$quoteset]}" != "$x" ]; then
            wrap='"'
        else
            wrap=""
        fi
        cmd="${cmd} $wrap$x$wrap"
    done
    _RET="${cmd# }"
}

run(){
    # run(level=[warn,info,debug,trace], [quiet], cmd...)
    local rc="" m=""
    shellquote "$@"
    debug 1 "$_RET"
    "$@"
}

main() {
    local short_opts="ho:v"
    local long_opts="help,name:,verbose"
    local getopt_out=""
    getopt_out=$(getopt --name "${0##*/}" \
        --options "${short_opts}" --long "${long_opts}" -- "$@") &&
        eval set -- "${getopt_out}" ||
        { bad_Usage; return; }

    local cur="" next="" rname="" src=centos

    while [ $# -ne 0 ]; do
        cur="$1"; next="$2";
        case "$cur" in
            -h|--help) Usage ; exit 0;;
            -v|--verbose) VERBOSITY=$((${VERBOSITY}+1));;
            -o|--name) rname=$2; shift;;
            --) shift; break;;
        esac
        shift;
    done

    [ $# -eq 1 -o $# -eq 2 ] || {
        bad_Usage "got $# args, expected 1 or 2";
        reutrn 1
    }

    [ $# -eq 2 ] && { src=$1; pkg=$2; }
    [ $# -eq 1 ] && { src="centos"; pkg=$1; }
    [ -z "$rname" ] && rname="$src"

    case "$src" in
        centos) url="https://git.centos.org/rpms/$pkg.git";;
        fedora) url="https://src.fedoraproject.org/rpms/$pkg.git";;
        *) error "Bad source '$src'. expected fedora or centos.";;
    esac

    TEMP_D=$(mktemp -d "${TMPDIR:-/tmp}/${0##*/}.XXXXXX") ||
        fail "failed to make tempdir"
    trap cleanup EXIT

    if [ ! -d .git ]; then
        [ -d "$pkg" ] && fail "no .git dir in $PWD and $pkg exists."
        debug 0 "Creating new repo for package $pkg in ./$pkg"
        git init "$pkg" || fail "failed git init"
        cd "$pkg"
    fi

    if git remote | grep -q "^$rname$"; then
        fail "$rname remote exists. remove first."
    fi

    REMOVE_REMOTE="$rname"
    if [ "${SLOW:-0}" != "0" ]; then
        # this is simply much slower.
        # https://github.com/repoSpanner/repoSpanner/issues/79
        run git remote add --no-tags $rname "$url" ||
            fail "Failed to add $rname at $url. removing."

        run git config --local --add \
            "remote.$rname.fetch" "+refs/tags/*:refs/tags/$rname/*" ||
            fail "failed to config remote.$rname.fetch for tags"

        run git fetch -v "$rname" || fail "Failed to fetch $rname."
    else
        cdir="${TEMP_D}/$rname"
        run git clone --bare "$url" "$cdir" ||
            fail "failed clone $url to $cdir"
        run git remote add --no-tags "$rname" "$cdir" ||
            fail "Failed to add remote $rname"
        run git config --local --add \
            "remote.$rname.fetch" "+refs/tags/*:refs/tags/$rname/*" ||
            fail "failed to config remote.$rname.fetch for tags"
        run git fetch -v "$rname" || fail "Failed to fetch $rname."
        run git remote set-url "$rname" "$url" ||
            fail "failed to set url to actual $url"
        run git fetch "$rname" || fail "Failed second fetch"
    fi
    REMOVE_REMOTE=""
    exit 0
}

main "$@"
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