The host/chez directory mixed jolt's own runtime (value model, seq, reader,
vars, ns, multimethods) with the shims that emulate the JVM: java.* / javax.*
classes, clojure.lang interfaces, and the host-class registry they hang off.
Move that JVM-emulation layer into host/chez/java/ so it reads as a distinct
unit instead of being interleaved with the platform runtime.
Moved (content unchanged): host-static, host-static-methods,
host-static-classes, host-class, dot-forms, records-interop, byte-buffer,
io, io-streams, inst-time, java-time, bigdec, natives-queue, natives-str,
natives-array, math, concurrency, async, ffi.
The load paths in rt.ss/cli.ss and the build.ss runtime manifest are updated
to point at java/; the build inliner follows the (load ...) strings, so the
AOT path needs no other change. All runtime shims, no seed source touched
(the three .clj edits are doc comments), so no re-mint.
Gate green: make test (selfhost fixpoint, certify 0-new, sci 211, infer),
shakesmoke (4 apps byte-identical).
Restores the standalone-binary capability the Janet host had. `bin/joltc build
-m NS -o OUT` AOT-compiles an app into a single self-contained executable — the
whole runtime, clojure.core, stdlib and compiler embedded, no Chez install or
jolt source needed at runtime.
Pipeline (host/chez/build.ss, host primitive jolt.host/build-binary driven by
jolt.main's build command): resolve deps, load the entry namespace recording the
app namespaces in dependency order, re-emit each to Scheme, textually inline the
cli.ss runtime load sequence into one flat source + the app + a launcher, then
compile-file -> make-boot-file -> embed the boot as C bytes -> cc-link against
libkernel.a.
Two non-obvious bits: the compile pass runs in a fresh Chez, not the loaded
runtime (regex.ss shadows top-level `error`, which otherwise bakes a broken
reference into the boot); and the launcher installs scheme-start rather than
running -main at top level, since boot top-level forms execute during heap build
before argv is set, so args only reach -main through scheme-start.
Loader: a require of an in-memory namespace with no source file now no-ops, so
AOT'd app namespaces satisfy require in a built binary.
Mode flags (--opt/--dev, default release) are plumbed; the optimization passes
they gate come in a later stage. RFC 0007 has the design. Gated by `make
buildsmoke`.
Rename src/jolt -> stdlib (the runtime-loaded layer; jolt-core stays the
seed-baked layer) and update the loader / emit-image / doc paths. Drop dead
code: the spike/ experiments, the duplicate clojuredocs-export.edn (json moves
to tools/), the Janet-era jolt.http binding, and the orphaned
persistent_vector.clj whose ns/path didn't even match.
Strip porting residue from comments and docstrings across host/chez, jolt-core,
stdlib, tests, and docs: internal issue ids, "Phase N" markers, and the "vs
Janet" historical exposition, leaving present-tense descriptions and the real
JVM-Clojure semantic contrasts. Same pass over the corpus suite labels. The seed
is unchanged (docstrings/comments aren't emitted), so the self-host fixpoint and
corpus are untouched.
Port tools/spec_coverage.py off the dead janet probe to bin/joltc and regenerate
coverage.md; drop the dead :host/janet rule from certify.clj and regenerate the
conformance profile. Add docs/host-interop.md (the JVM shims and how to register
your own host class from a library) and a writing-style note in CLAUDE.md.
Stabilize the four racy concurrency corpus cases (future-cancel and agent
send/send-off): give the future a sleeping body and the agent a slow action, so
cancel reliably catches an in-flight future and deref reliably reads the
pre-update snapshot. They certify deterministically now, so drop their :flaky
allowlist entries and the orphaned legend.
jolt-lang/http-client (clj-http-lite over jolt.ffi) replaces it, the same way
ring-janet-adapter replaced the built-in HTTP server. An HTTP client is a library
concern — jolt core no longer ships one or shells out to curl. Apps depend on the
library; (require '[jolt.http-client]) now resolves to its source.
Full gate green.
The HTTP server moves out of the host into the jolt-lang/ring-janet-adapter
library, which binds sockets itself via jolt.ffi and shuts down cleanly. Drop
host/chez/http-server.ss and the obsolete ffi-server-test (the FFI collect-safe
path is covered by ffi-binding-test; the server by the adapter's own CI).
The sqlite/jdbc functionality moves out of the host into the jolt-lang/db
library, which binds libsqlite3 (and libpq) itself via jolt.ffi. A baked
built-in jdbc.core would shadow the library's, so it's removed here. ring-app
gets jdbc.core from the db git dep instead.
A jolt library can now bind its own native dependencies and expose a Clojure API
over them — no jolt built-in required. This is the foundation for moving the
http-client / db / adapter functionality out of the host and into real libraries.
- jolt.ffi/foreign-fn (sugar: defcfn) is a compiler special form: a compile-time
-typed C signature lowers to a real Chez foreign-procedure (analyzer :ffi-fn ->
backend foreign-procedure), so calls are typed and marshaled, not eval'd.
- host/chez/ffi.ss provides the rest under jolt.ffi: load-library, alloc/free,
read/write/sizeof, ptr<->string, null/null?. Loaded after the loader snapshot
so a library's (require '[jolt.ffi]) still loads the macro side.
- Types: int/uint/long/ulong/int64/uint64/size_t/ssize_t/iptr/uptr/double/float/
pointer/string/void/uint8/char.
Validated end to end: a pure-Clojure file binds libc (getpid/strlen/abs) and
libsqlite3 (open/prepare/step/column/finalize over out-param pointers) and runs a
query. Gate test test/chez/ffi-binding-test.ss (make ffi); selfhost holds.
Shaking the ring-app example's real library stack out against jolt surfaced a
batch of divergences from JVM Clojure, the biggest being evaluation order.
backend_scheme: call and recur arguments were emitted as bare Scheme operands,
so Chez's unspecified (right-to-left) order won out. Clojure evaluates left to
right, which selmer's reader loop relies on: (recur (add-node ... rdr) (read-char
rdr)) consumed a char early and dropped the first chars of every {{tag}}. Bind
operands to fresh temps in a let* (only when two or more can have side effects,
so hot calls over locals/consts stay un-wrapped). emit-ordered already did this
for collection literals; generalize it.
host-contract: syntax-quote now resolves the alias part of a qualified symbol
(impl/foo -> clojure.tools.logging.impl/foo) instead of leaving it bare, which
limped along via short-name matching until two loaded namespaces (reitit.impl,
clojure.tools.logging.impl) shared the short name and it broke.
collections: key-hash masks with bitwise-and, not fxand — jolt-hash is set!-
decorated per type (records return their own hash) and Chez's equal-hash can be a
bignum, so a key's hash isn't always a fixnum.
seq: even?/odd? handle bignums (JVM accepts any integer; the fxand crashed).
records: Keyword/Symbol .sym/.getName/.toString (honeysql's :clj branch reads
(.sym k)); Throwable .getMessage/.toString over a Chez condition.
host-static: __register-class-ctor!/__register-class-statics! so a host shim
(reitit.trie-jolt) can mirror a Java class.
natives-str: String.intern returns the string.
sqlite: jdbc.core fetch/fetch-one kebab-case column keys (the jolt-lang/db
convention; created_at -> :created-at).
io: a relative io/file path resolves against JOLT_PWD (the user's cwd), not the
repo root the launcher cd'd to — matches JVM cwd semantics, so config.edn loads.
cli: render an uncaught jolt throw (ex-info message + ex-data, or a condition)
instead of Chez's opaque "non-condition value" dump.
sqlite.ss: jolt.sqlite + jdbc.core (jolt-lang/db's API) over the system
libsqlite3 — open/close, exec, a prepared query returning row maps, text/int/
double parameter binding, last_insert_rowid. The sqlite3 C API is non-variadic
so it binds directly.
http-server.ss: a minimal HTTP/1.1 server over BSD sockets (socket/bind/listen/
accept/recv/send via FFI), one connection at a time on a background accept
thread, synchronous Ring handlers. Parses the request line + headers + a
Content-Length body into a Ring request map (:body a StringReader), formats a
Ring response map back. Exposed as jolt.http.server and, for the example, as
ring-janet.adapter/run-server. macOS and Linux socket-option constants handled.
A synchronous HTTP client def-var!'d into jolt.http-client (get/post/put/delete/
head/request -> {:status :headers :body}), with :headers, :body, :query-params,
:content-type and :insecure?. It shells out to the system `curl` rather than a
direct libcurl FFI: on Apple Silicon curl_easy_setopt is variadic and Chez's
fixed-signature foreign-procedure can't place the value arg on the stack where
the ABI expects it, so a direct bind silently drops the option. curl gives the
same native TLS/redirect/gzip with no per-platform C shim.
format now honours width and the -/0 flags (%-30s, %5d, %05d), not just %.Nf
precision — it was emitting the directive literally.
A minimal truecolor PNG encoder over Chez bytevectors — CRC-32 / Adler-32
framing with DEFLATE "stored" blocks, so there's no compressor to carry. Restores
the jolt.png built-in (image/put!/write) the old host provided; def-var!'d into
the jolt.png namespace and loaded in the CLI before the loader's baked-namespace
snapshot, so (require '[jolt.png]) resolves with no source file. Output verified
to decode as a valid PNG (signature, IHDR, CRC-correct chunks, inflatable IDAT).
joltc grew from a single -e expression into a real project runner. require now
loads a namespace's .clj/.cljc from the source roots transitively (load-once),
so a multi-file project works; the corpus/unit gates load compile-eval.ss but
not the loader, so their alias-only require is unchanged.
jolt.deps resolves a deps.edn into ordered source roots — git + local deps only
(no Maven), breadth-first so a top-level pin wins, with aliases (:extra-paths/
:extra-deps/:main-opts) and tasks. Git deps clone into a sha-immutable cache
($JOLT_GITLIBS, else ~/.jolt/gitlibs) by shelling out to git via a new
jolt.host/sh primitive. jolt.main dispatches run -m / -M:alias / -A / repl /
path / a deps.edn task. The launcher passes the user's cwd as JOLT_PWD (the
project dir) since it cd's to the repo root for the runtime's relative loads.
The runtime counterpart to bootstrap.ss. host/chez/cli.ss loads the checked-in
seed + the zero-Janet spine and compiles+evals a -e expression entirely on Chez;
bin/joltc execs it. With the seed checked in, a clone runs jolt with only Chez
installed — no Janet at build or run time. Multi-form -e wraps in (do ...) to
match Clojure. test/chez/cli-test.janet 9/9.
