vcsprepare

#!/bin/bash
PS4='+(${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
set -e -o pipefail

argv0=vcsprepare
tmp=$(mktemp -d)
readonly argv0 tmp

# /!\ EXPERIMENTAL

findsrc() {
    find "$@" -maxdepth 1 -type f -name .SRCINFO -print0
}

gensrc() {
    xargs -0i awk '/^pkgbase/ {b = $3} /^\tsource/ {print b, $3}' {}
}

findvcs() {
    declare -A vcs match

    while IFS=':' read -r proto _ client; do
        vcs[$proto]=$client
    done < <(printf '%s\n' "${VCSCLIENTS[@]}")

    while read -r pkg uri; do
        proto=$(get_protocol "$uri")
        proto=${proto/[+:]*}
        
        if [[ ${vcs[$proto]} ]]; then
            match[$pkg]=${vcs[$proto]}
        fi
    done < <(findsrc "$@" | gensrc)

    for i in "${!match[@]}"; do
        printf '%s %s\n' "$i" "${match[$i]}"
    done
}

prepare() {
    makepkg -do --noprepare >/dev/null
    mksrcinfo    

    awk '/^\tpkgver/ {v = $3} /^\tpkgrel/ {r = $3} /^\tepoch/ {e = $3":"}
         /^pkgname/  {n = $3; printf "%s %s%s-%s\n", n, e, v, r}
    ' .SRCINFO
}

trap 'rm -rf "$tmp"' EXIT

source /etc/makepkg.conf
source /usr/share/makepkg/util.sh

[[ -t 2 ]] && colorize

if ((!$#)); then
    plain "usage: vcsprepare target [target ...]"
    exit 1
fi

# XXX: Validate sudo for loop below
sudo -v

# 1. Retrieve "package client" strings from .SRCINFO
# 2. Install client if not available
# 3. Update VCS sources
# 4. Update .SRCINFO
# 5. Print "pkgname fullver"
while read -r pkg client; do
    if ! pacman -T "$client" >/dev/null; then
        sudo -n pacman -S --asdeps --noconfirm "$client"
    fi

    # XXX: Only works if targets are in PWD
    # XXX: Continues on failure   
    ( cd "$pkg"
      prepare
    ) &
done < <(findvcs "$@") > "$tmp"/vcs_all

wait

grep -Fxvf <(aursift -U < "$tmp"/vcs_all) <(awk '{print $1}' "$tmp"/vcs_all)