tezos-downstream

#!/bin/bash
#
# After a release to the opam-repository, prepare a release to Tezos'
# opam repository as well.

set -euo pipefail

OPAM_MAIN=~/t/opam-repository
OPAM_TEZOS=~/t/tezos-opam-repository

# List of packages in the Tezos ecosystem that we maintain
PACKAGES=(
    alcotest
    alcotest-lwt
    digestif
    either
    index
    irmin
    irmin-layers
    irmin-mem
    irmin-pack
    ppx_irmin
    ppx_repr
    progress
    repr
    semaphore-compat
)

printf "Fetching from upstream in both repositories\n\n"
git -C "$OPAM_MAIN" fetch -q upstream
git -C "$OPAM_MAIN" checkout upstream/master
git -C "$OPAM_TEZOS" fetch -q upstream
git -C "$OPAM_TEZOS" checkout upstream/master

latest_version_of_pkg () {
    ls -1 "$OPAM_MAIN/packages/$1" | tail -n 1 | cut -d. -f 2-
}

get_package_versions () {
    todo=false
    for pkg in ${PACKAGES[@]}; do
        # Get latest version in each repository
        version_main=$(latest_version_of_pkg $pkg)
        version_tezos=$((ls -1 "$OPAM_TEZOS/packages/$pkg" 2>/dev/null || true) | tail -n 1 | cut -d. -f 2-)

        if [[ -z "$version_tezos" ]]; then
            printf "Release %-29s %6s\n" "'$pkg'" "$version_main"
            todo=true

        elif [[ ! "$version_main" == "$version_tezos" ]]; then
            printf "Upgrade %-20s %-6s → %6s\n" "'$pkg'" "$version_tezos" "$version_main"
            todo=true
        fi
    done

    [[ "$todo" == "true" ]] || (echo >&2 "No actions to perform." && return 1)
}

perform_modification () {
    action=$(echo "$1" | cut -f1)
    echo $action
}

TMPFILE=/tmp/tezos-downstream-actions
printf ";; Changes to make; delete accordingly.\n\n" > $TMPFILE
get_package_versions >> $TMPFILE


$EDITOR $TMPFILE </dev/tty >/dev/tty
sed -ir 's/;;.*$//; /^$/d; ' $TMPFILE

main_pkg=$(cat $TMPFILE | fzf --prompt "Main action: " | grep -oP "'\K.*(?=\')")
main_pkg_version=$(latest_version_of_pkg $main_pkg)

cat $TMPFILE | sed -r 's/ +/ /g' | while read modification; do
    action=$(echo "$modification" | cut -f1 -d' ')
    pkg=$(echo "$modification" | cut -f2 -d' ' | sed -r "s/^'//; s/'$//")
    new_version=$(echo "$modification" | cut -f3 -d' ' | sed -r "s/ +/ /g")
    case $action in
        "Release")
            new_version=$(echo "$modification" | cut -f3 -d' ')

            mkdir -p "$OPAM_TEZOS/packages/$pkg/$pkg.$new_version"
            cp -r "$OPAM_MAIN/packages/$pkg/$pkg.$new_version" "$OPAM_TEZOS/packages/$pkg/$pkg.$new_version"
        ;;

        "Upgrade")
            old_version=$(echo "$modification" | cut -f3 -d' ')
            new_version=$(echo "$modification" | cut -f5 -d' ')

            rm -irf "$OPAM_TEZOS/packages/$pkg/$pkg.$old_version"
            cp -r "$OPAM_MAIN/packages/$pkg/$pkg.$new_version" "$OPAM_TEZOS/packages/$pkg/$pkg.$new_version"
        ;;

        *) echo >&2 "Malformed action: $action" && exit 1
    esac
done

branch_name="release-$main_pkg-$main_pkg_version"
git -C "$OPAM_TEZOS" add .
git -C "$OPAM_TEZOS" branch -f $branch_name
git -C "$OPAM_TEZOS" switch $branch_name

( printf "Release '$main_pkg.$main_pkg_version' and associated packages\n\n" && cat "$TMPFILE" ) |\
    git -C "$OPAM_TEZOS" commit --file=-