#!/usr/bin/env bash
# shellcheck shell=bash
# - - - - - - - - - - - - - - - - - - - - - - - - -
##@Version           :  202605311104-git
# @@Author           :  Jason Hempstead
# @@Contact          :  jason@casjaysdev.pro
# @@License          :  WTFPL
# @@ReadME           :  rust-workflow --help
# @@Copyright        :  Copyright: (c) 2026 Jason Hempstead, Casjays Developments
# @@Created          :  Sunday, May 31, 2026 11:04 EDT
# @@File             :  rust-workflow
# @@Description      :  Default Rust workflow: fmt → clippy → test → build
# @@Changelog        :  New script
# @@Other            :
# @@Resource         :
# @@Terminal App     :  no
# @@sudo/root        :  no
# @@Template         :  other/docker-workflow
# - - - - - - - - - - - - - - - - - - - - - - - - -
# shellcheck disable=SC1001,SC1003,SC2001,SC2003,SC2016,SC2031,SC2090,SC2115,SC2120,SC2155,SC2199,SC2229,SC2317,SC2329
# - - - - - - - - - - - - - - - - - - - - - - - - -
# Runs automatically when `docker run casjaysdev/rust` is called with no args.
# Working directory must be a Cargo workspace or crate root (Cargo.toml must exist).
set -euo pipefail

# - - - - - - - - - - - - - - - - - - - - - - - - -
# Resolve the working directory — prefer /app if mounted, then cwd
WORK_DIR="${CARGO_WORKDIR:-${PWD}}"
cd "$WORK_DIR"

# - - - - - - - - - - - - - - - - - - - - - - - - -
# Require a Cargo.toml so we fail fast with a clear message instead of
# cryptic cargo errors about missing manifests
if [ ! -f "Cargo.toml" ]; then
  echo "Error: no Cargo.toml found in ${WORK_DIR}" >&2
  echo "Mount your project with: docker run --rm -v \"\$(pwd)\":/app casjaysdev/rust" >&2
  exit 1
fi

# - - - - - - - - - - - - - - - - - - - - - - - - -
# Resolve the crate or workspace name from the manifest
CRATE="$(awk -F'"' '/^\[package\]/{p=1} p && /^name[[:space:]]*=/{print $2; exit}' Cargo.toml)"
[ -z "$CRATE" ] && CRATE="$(basename "$WORK_DIR")"

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# Optional target override — set CARGO_BUILD_TARGET for cross-compilation or
# static musl builds (e.g. x86_64-unknown-linux-musl)
BUILD_TARGET="${CARGO_BUILD_TARGET:-}"

# Collect extra flags for steps that accept a target
build_flags=(--release)
test_flags=()
if [ -n "$BUILD_TARGET" ]; then
  build_flags+=(--target "$BUILD_TARGET")
  test_flags+=(--target "$BUILD_TARGET")
fi

# - - - - - - - - - - - - - - - - - - - - - - - - -
echo ""
echo "▶ Rust workflow: ${CRATE}"
echo "  Working dir:  ${WORK_DIR}"
echo "  Rust:         $(rustc --version)"
echo "  Cargo:        $(cargo --version)"
[ -n "$BUILD_TARGET" ] && echo "  Target:       ${BUILD_TARGET}"
echo ""

# - - - - - - - - - - - - - - - - - - - - - - - - -
run_step() {
  local label="$1"; shift
  echo "── ${label}"
  "$@"
  echo ""
}

# - - - - - - - - - - - - - - - - - - - - - - - - -
# 1. Check formatting — report violations but do not auto-modify source
run_step "cargo fmt --check" cargo fmt --all -- --check

# 2. Lint with clippy across all targets and features; treat warnings as errors
run_step "cargo clippy" cargo clippy --all-targets --all-features -- -D warnings

# 3. Run the full test suite before spending time on a release build
run_step "cargo test --all" cargo test --all "${test_flags[@]}"

# 4. Build the release binary (static if CARGO_BUILD_TARGET is set)
run_step "cargo build --release" cargo build --all "${build_flags[@]}"

echo "✅ Done."