100 lines
4.0 KiB
Markdown
100 lines
4.0 KiB
Markdown
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# Self‑Hosting Quickstart (Phase 15 — Resume)
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This note shows how to run the hakorune self‑host compiler MVP to emit AST JSON / MIR(JSON v0) and execute it with the current VM line. The flow keeps defaults unchanged and uses small, opt‑in flags for development.
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## Layout
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- Compiler MVP: `lang/src/compiler/entry/compiler.hako`（移行済。旧パスは互換のみ）
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- Runtime helpers (dev): `apps/selfhost-runtime/`
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- Mini‑VM samples (dev): `apps/selfhost/vm/`
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## Run the self‑host compiler（Official runner path）
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Use the runner’s selfhost pipeline with parent→child ENV forwarding. Defaults stay unchanged; all flags are opt‑in.
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Examples (safe, short, quiet):
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```
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# Emit minimal AST JSON via pipeline v2 (header must contain {"version", "kind"})
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NYASH_DISABLE_PLUGINS=1 \
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NYASH_USE_NY_COMPILER=1 \
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NYASH_NY_COMPILER_MIN_JSON=1 \
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NYASH_NY_COMPILER_CHILD_ARGS="--pipeline-v2" \
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NYASH_NY_COMPILER_EMIT_ONLY=1 \
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NYASH_NY_COMPILER_SKIP_PY=1 \
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NYASH_JSON_ONLY=1 \
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timeout 5 ./target/release/hakorune --backend vm apps/examples/string_p0.hako
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# Emit minimal MIR(JSON v0) (const→ret)
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NYASH_DISABLE_PLUGINS=1 \
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NYASH_USE_NY_COMPILER=1 \
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NYASH_NY_COMPILER_MIN_JSON=1 \
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NYASH_NY_COMPILER_CHILD_ARGS="--emit-mir" \
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NYASH_NY_COMPILER_EMIT_ONLY=1 \
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NYASH_NY_COMPILER_SKIP_PY=1 \
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NYASH_JSON_ONLY=1 \
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timeout 5 ./target/release/hakorune --backend vm apps/examples/string_p0.hako
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```
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Parent→child ENV mapping（official）
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- `NYASH_NY_COMPILER_MIN_JSON=1` → child gets `-- --min-json`
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- `NYASH_SELFHOST_READ_TMP=1` → child gets `-- --read-tmp` (reads `tmp/ny_parser_input.ny`)
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- `NYASH_NY_COMPILER_STAGE3=1` → child gets `-- --stage3`
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- `NYASH_NY_COMPILER_CHILD_ARGS="..."` → child gets extra args verbatim
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- `NYASH_EMIT_TRACE=1` → child gets `-- --emit-trace` (dev trace: 1行だけ [emit] 出力。最後のJSON行は不変)
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- `NYASH_PREFER_CFG=1|NYASH_PREFER_CFG2=1` → child gets `-- --prefer-cfg` or `--prefer-cfg2`（CFG優先/材化あり）
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- Timeouts / quiet pipe:
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- `NYASH_NY_COMPILER_TIMEOUT_MS=2000`（default）
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- `NYASH_JSON_ONLY=1`（suppress logs, print JSON only）
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Direct run (dev only; requires allowing file using):
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```
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timeout 5 \
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NYASH_DISABLE_PLUGINS=1 NYASH_ENABLE_USING=1 NYASH_ALLOW_USING_FILE=1 NYASH_USING_AST=1 NYASH_JSON_ONLY=1 \
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./target/release/hakorune --backend vm lang/src/compiler/entry/compiler.hako -- --min-json
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# Optional: pipeline v2 (emit-only)
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timeout 5 \
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NYASH_DISABLE_PLUGINS=1 NYASH_USING=1 NYASH_ALLOW_USING_FILE=1 NYASH_USING_STRATEGY=prelude NYASH_JSON_ONLY=1 \
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./target/release/hakorune --backend vm lang/src/compiler/entry/compiler.hako -- --min-json --pipeline-v2
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```
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## Execute MIR(JSON v0)
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Use the VM line (Rust) or PyVM harness as needed.
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Rust VM (default):
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```
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./target/release/hakorune --backend vm apps/examples/json_query/main.hako
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```
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PyVM reference (when verifying parity):
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```
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NYASH_VM_USE_PY=1 ./target/release/hakorune --backend vm apps/examples/json_query/main.hako
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```
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LLVM harness (llvmlite):
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```
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NYASH_LLVM_USE_HARNESS=1 ./target/release/hakorune --backend llvm apps/examples/json_query/main.hako
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```
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Notes:
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- For self‑host emitted JSON, route the file to your runner pipeline or a small loader script (dev only). Keep defaults unchanged in CI (no new jobs required).
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## One‑shot dev smoke
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Run quick selfhost checks (JSON header, normalization shapes, VM/LLVM parity when available):
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```
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tools/smokes/v2/run.sh --profile quick --filter '*selfhost*'
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```
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Notes on normalization
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- Emitter delegates to `JsonProgramBox` which ensures stable shapes for Return/If/Loop/Call/Compare/Logical and always appends `meta.usings`.
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## Flags (dev)
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- Known rewrite default ON (userbox only, strict guards): `NYASH_REWRITE_KNOWN_DEFAULT=0|1`
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- Router trace: `NYASH_ROUTER_TRACE=1`
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- KPI sampling: `NYASH_DEBUG_KPI_KNOWN=1` (+ `NYASH_DEBUG_SAMPLE_EVERY=N`)
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- Local SSA trace: `NYASH_LOCAL_SSA_TRACE=1`
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## Acceptance (P6 resume)
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- quick/integration remain green.
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- Minimal self‑host emit→execute path PASS in a dev job (no CI change).
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- No default behavior changes; all diagnostics under env flags.
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