# meshcore-spec — task runner.
#
# Every recipe runs under `mise exec -- sh -c …`, so mise-pinned tools
# (see mise.toml) are on PATH and we never accidentally use a system
# mdbook of the wrong version. `sh` is intentional — keep recipes
# POSIX-compatible.
#
# Background on `preview` vs the other build recipes:
# `mdbook build` (used by `build` and `serve`) produces a single-
# version site with no versions.json, so the version-picker stays in
# its label-only fallback there. To see the picker as a dropdown
# locally, run `just preview` — it builds the full multi-version site
# AND serves it over HTTP, since browsers block fetch() under file://.

set shell := ["mise", "exec", "--", "sh", "-c"]

# Show the available recipes.
_default:
    @just --list

# Install / refresh tools pinned in mise.toml.
setup:
    mise install

# Build a single-version site into ./book/ (mdbook output dir).
build:
    mdbook build

# Build the full multi-version site into ./_site/ (same logic CI runs).
build-site:
    sh scripts/build-site.sh

# Build the multi-version site and serve it at http://localhost:8000/.
preview: build-site
    @echo ""
    @echo "Serving ./_site/ at http://localhost:8000/"
    @echo "  http://localhost:8000/latest/   - rolling main"
    @echo "  http://localhost:8000/v0.1.0/   - frozen v0.1.0"
    @echo "  Ctrl-C to stop."
    @echo ""
    cd _site && python3 -m http.server 8000

# Live-preview a single-version build at http://localhost:3000 (auto-reload).
serve:
    mdbook serve --open --port 3000

# Remove all build outputs (single- and multi-version).
clean:
    rm -rf book _site

# Run the corpus validator.
validate:
    python3 tools/validate.py corpus/

# Snapshot ./src/ as ./versions/VERSION/. Usage: just cut-version v0.2.0
cut-version VERSION:
    #!/usr/bin/env sh
    set -eu
    case "{{VERSION}}" in
        v[0-9]*.[0-9]*.[0-9]*) ;;
        *) echo "Version must look like vX.Y.Z (got '{{VERSION}}')" >&2; exit 1 ;;
    esac
    if [ -e "versions/{{VERSION}}" ]; then
        echo "versions/{{VERSION}} already exists; not overwriting." >&2
        exit 1
    fi
    mkdir -p versions
    # Snapshot both the spec text AND its paired test corpus, so the
    # release is a self-contained pair. The site infrastructure
    # (book.toml, theme, scripts, tools) stays unversioned at the
    # repo root and applies to every build.
    cp -R src "versions/{{VERSION}}"
    cp -R corpus "versions/{{VERSION}}/corpus"
    # Freeze the version marker in the snapshot. src/ keeps the literal
    # `latest (main)` so the rolling /latest/ build stays accurate.
    sed -i 's|`latest (main)`|`{{VERSION}}`|' "versions/{{VERSION}}/00-overview.md"
    if ! grep -q '`{{VERSION}}`' "versions/{{VERSION}}/00-overview.md"; then
        echo "warning: expected version marker not found in 00-overview.md; the" >&2
        echo "snapshot still says 'latest (main)'. Check that src/00-overview.md" >&2
        echo "contains the marker line ('**Spec version:** \`latest (main)\`')." >&2
    fi
    # Repoint corpus URLs in the snapshot's spec text from main/corpus
    # to main/versions/<v>/corpus — the frozen copy lives in the repo
    # at a stable path on main, so the GitHub links resolve without
    # needing a git tag. -maxdepth 1 keeps the substitution off the
    # corpus *.json files (they get their own pass below).
    find "versions/{{VERSION}}" -maxdepth 1 -name '*.md' -exec sed -i \
        -e 's|/tree/main/corpus|/tree/main/versions/{{VERSION}}/corpus|g' \
        -e 's|/blob/main/corpus|/blob/main/versions/{{VERSION}}/corpus|g' \
        {} +
    # Repoint spec_ref inside the frozen corpus to this version's
    # frozen spec, so a reader following a test vector lands on the
    # spec text the vector was paired with at release time.
    find "versions/{{VERSION}}/corpus" -name '*.json' -exec sed -i \
        's|"spec_ref": "src/|"spec_ref": "versions/{{VERSION}}/|g' \
        {} +
    echo "Snapshotted: src/ + corpus/ -> versions/{{VERSION}}/"
    echo
    echo "Next steps:"
    echo "  - git add versions/{{VERSION}} && commit (e.g. \"release {{VERSION}}\")"
    echo "  - optionally tag the commit: git tag {{VERSION}}"