task

#!/bin/sh
set -eu
root=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd -P)
cache=${LORE_BUILD_CACHE:-${XDG_CACHE_HOME:-$HOME/.cache}/lore/build}
case "$cache" in /*) : ;; *) printf 'LORE build cache must be absolute.\n' >&2; exit 1 ;; esac
[ ! -L "$cache" ] || exit 1
mkdir -p "$cache/tmp"
chmod 700 "$cache" "$cache/tmp"
export TMPDIR=$cache/tmp CARGO_TARGET_DIR=$cache
export CARGO_BUILD_JOBS=${CARGO_BUILD_JOBS:-2}
mode=${1:-help}
[ "$#" -eq 0 ] || shift
case "$mode" in
  build) cargo build --release --locked --manifest-path "$root/Cargo.toml" --package lore-core --bin lore-rs ;;
  install)
    cargo build --release --locked --manifest-path "$root/Cargo.toml" --package lore-core --bin lore-rs
    bin=${LORE_BIN_DIR:-$HOME/.local/bin}
    case "$bin" in /*) : ;; *) exit 1 ;; esac
    mkdir -p "$bin"
    stage=$(mktemp -d "$bin/.lore-install.XXXXXXXX")
    installing=0
    cleanup() {
      trap - EXIT HUP INT TERM
      if [ "$installing" -eq 1 ]; then
        failed=0
        for name in lore-rs lore; do
          rm -f "$bin/$name" || { failed=1; continue; }
          if [ -e "$stage/backup/$name" ] || [ -L "$stage/backup/$name" ]; then
            mv "$stage/backup/$name" "$bin/$name" || failed=1
          fi
        done
        [ "$failed" -eq 0 ] || { printf 'Rollback incomplete; backups remain in %s/backup\n' "$stage" >&2; exit 1; }
      fi
      rm -rf "$stage"
    }
    trap 'cleanup' EXIT
    trap 'exit 1' HUP INT TERM
    cp "$cache/release/lore-rs" "$stage/lore-rs"
    chmod 755 "$stage/lore-rs"
    ln -s lore-rs "$stage/lore"
    mkdir "$stage/backup"
    for name in lore-rs lore; do
      [ ! -d "$bin/$name" ] || [ -L "$bin/$name" ] || exit 1
      if [ -e "$bin/$name" ] || [ -L "$bin/$name" ]; then cp -Pp "$bin/$name" "$stage/backup/$name"; fi
    done
    installing=1
    for name in lore-rs lore; do
      if [ -L "$bin/$name" ]; then rm "$bin/$name"; fi
      mv -f "$stage/$name" "$bin/$name"
    done
    installing=0
    printf 'Installed native LORE at %s/lore\n' "$bin"
    ;;
  run) cargo build --locked --manifest-path "$root/Cargo.toml" --package lore-core --bin lore-rs; exec "$cache/debug/lore-rs" "$@" ;;
  setup) cargo build --release --locked --manifest-path "$root/Cargo.toml" --package lore-core --bin lore-rs; LORE_RS="$cache/release/lore-rs" exec "$root/bin/lore" setup "$@" ;;
  test) cargo test --locked --manifest-path "$root/Cargo.toml" ;;
  help|-h|--help) printf '%s\n' './task build | install | run [LORE arguments] | setup | test' ;;
  *) printf 'Unknown task: %s\n' "$mode" >&2; exit 1 ;;
esac