#!/bin/sh
# script/fmt-check: check formatting (read-only). Fails instead of
# writing. It checks every Go file outside .tool, which is more than
# script/fmt formats: `go fmt ./...` skips `testdata` directories and
# files and directories whose names start with `.` or `_`. Fix a file
# only this reports with `gofmt -w`. Markdown is checked with prettier.
set -eu

ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"

# Must match the pin in script/bootstrap.
NODE_VERSION="22.17.0"

# script/bootstrap installs node and yarn under nvm and leaves neither
# on the PATH of the shell that called it, so resolve the pinned
# toolchain here the way bootstrap's own install step does. nvm is a
# bash script, hence the subshell.
run_yarn() {
    if command -v yarn >/dev/null 2>&1; then
        exec yarn "$@"
    fi
    if [ ! -s "$HOME/.nvm/nvm.sh" ]; then
        echo "fmt-check: no yarn; run script/bootstrap first" >&2
        exit 1
    fi
    exec bash -c '. "$HOME/.nvm/nvm.sh" && nvm use "$1" >/dev/null &&
        shift && exec yarn "$@"' bash "$NODE_VERSION" "$@"
}

main() {
    cd "$ROOT"
    # Where script/bootstrap installs Go when the host has none.
    PATH="$PATH:$ROOT/.tool/go/bin"
    # .tool/go holds that toolchain's own sources, which are not ours.
    if ! unformatted="$(find . -path ./.tool -prune -o -name '*.go' -type f \
        -exec gofmt -l {} +)"; then
        echo "fmt-check: gofmt failed" >&2
        exit 1
    fi
    if [ -n "$unformatted" ]; then
        echo "Files not formatted:" >&2
        echo "$unformatted" >&2
        exit 1
    fi
    run_yarn run prettier --check '**/*.md' --tab-width 4 --prose-wrap always
}

main "$@"
