#!/bin/bash
# Build IREE targets with Bazel.
#
# Usage: iree-bazel-build [options] [targets...] [bazel-args...]
#
# Examples:
#   iree-bazel-build                      # Build all tools
#   iree-bazel-build //compiler/...       # Build compiler
#   iree-bazel-build --config=debug       # Debug build

set -e

# Source shared library.
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "${SCRIPT_DIR}/iree-bazel-lib"
iree_bazel_init "iree-bazel-build"

# Expand combined short flags (e.g., -nv -> -n -v).
eval "set -- $(iree_expand_combined_flags "$@")"

show_help() {
    cat << 'EOF'
iree-bazel-build - Build IREE with Bazel

USAGE
    iree-bazel-build [options] [targets...] [bazel-args...]

OPTIONS
    -n, --dry_run    Show the bazel command without executing
    -v, --verbose    Show the bazel command before executing
    -k, --keep_going Continue building after errors
    -w, --watch      Watch mode: rebuild on file changes
    -h, --help       Show this help

    NOTE: Short flags can be combined: -nv is equivalent to -n -v

ARGUMENTS
    targets      One or more Bazel targets (at least one required)
    bazel-args   Additional arguments passed to bazel build

EXAMPLES
    # Build the compiler tool
    iree-bazel-build //tools:iree-compile

    # Build multiple tools at once
    iree-bazel-build //tools:iree-compile //tools:iree-opt

    # Build the runtime module executor
    iree-bazel-build //tools:iree-run-module

    # Build all compiler components
    iree-bazel-build //compiler/...

    # Debug build
    iree-bazel-build //tools:iree-compile --config=debug

    # Continue building after errors
    iree-bazel-build -k //compiler/...

    # Watch and rebuild on changes
    iree-bazel-build -w //tools:iree-opt

    # Show command without executing (verbose dry-run)
    iree-bazel-build -nv //tools:iree-compile

COMMON TARGETS
    //tools/...              All tools
    //compiler/...           Compiler components
    //runtime/...            Runtime components
    //tools:iree-compile     Main compiler tool
    //tools:iree-run-module  Module runner

CONFIGURATIONS
    --config=localdev        Local dev optimizations (disk cache, skymeld)
    --config=debug           No optimizations, assertions enabled
    --config=asserts         Optimized with assertions
    --config=asan            Address Sanitizer
    --config=msan            Memory Sanitizer
    --config=tsan            Thread Sanitizer

SEE ALSO
    iree-bazel-configure, iree-bazel-test
EOF
}

# Parse arguments.
KEEP_GOING=0
WATCH_MODE=0
TARGETS=()
BAZEL_ARGS=()

while [[ $# -gt 0 ]]; do
    case "${1}" in
        -h|--help)
            show_help
            exit 0
            ;;
        --agent-md|--agent_md)
            iree_show_agent_md
            exit 0
            ;;
        -n|--dry_run|--dry-run)
            IREE_BAZEL_DRY_RUN=1
            shift
            ;;
        -v|--verbose)
            IREE_BAZEL_VERBOSE=1
            shift
            ;;
        -k|--keep_going|--keep-going)
            KEEP_GOING=1
            shift
            ;;
        -w|--watch)
            WATCH_MODE=1
            shift
            ;;
        -*)
            BAZEL_ARGS+=("${1}")
            shift
            ;;
        *)
            TARGETS+=("${1}")
            shift
            ;;
    esac
done

# Set up worktree (after arg parsing so --help works anywhere).
iree_setup_worktree

# At least one target is required.
if [[ ${#TARGETS[@]} -eq 0 ]]; then
    iree_error "Target is required for bazel build"
    echo ""
    echo "Examples:"
    echo "  iree-bazel-build //tools:iree-compile"
    echo "  iree-bazel-build //tools:iree-compile //tools:iree-opt"
    echo "  iree-bazel-build //tools:iree-run-module"
    echo "  iree-bazel-build //compiler/..."
    exit 1
fi

# Build the command with default configs before user args.
iree_bazel_build_default_configs
BAZEL_BIN=$(iree_get_bazel_command "${WATCH_MODE}")
CMD=("${BAZEL_BIN}" build "${IREE_BAZEL_DEFAULT_CONFIGS[@]}")
if [[ "${KEEP_GOING}" == "1" ]]; then
    CMD+=(--keep_going)
fi
CMD+=("${TARGETS[@]}" "${BAZEL_ARGS[@]}")

# Execute or show.
if iree_is_verbose || iree_is_dry_run; then
    iree_info "Command: ${CMD[*]}"
fi

if iree_is_dry_run; then
    exit 0
fi

iree_info "Building ${TARGETS[*]}"
exec "${CMD[@]}"