ReScript cli clean up + watcher fix #6404

DZakh · 2023-09-14T23:36:33Z

Fixed dependencies reinitialization on every save in watch mode.

Before:

After:

Also:

Actualized help for commands
Started showing the compile time for rescript build command without watch mode
Pass through the -verbose flag to builds in watch mode

What I want to do next:

Fix the build needed condition.
Resolve the problems with duplicated builds (existed before the changes)
Enable watch mode for pinned dependencies 🤔
Update documentation

DZakh · 2023-09-14T23:42:39Z

jscomp/bsb_exe/rescript_main.ml

@@ -26,7 +26,7 @@ let () = Bsb_log.setup ()

 let separator = "--"

-let watch_mode = ref false


I've separated the watch mode from other delegated commands to handle it separately. So now we have better control over it, and the ref is unnecessary.

Before:

Trigger build and exit with 1

Start watching changes

Trigger build

After:

Trigger build

Start watching changes

DZakh · 2023-09-14T23:44:54Z

jscomp/bsb_exe/rescript_main.ml

@@ -26,7 +26,7 @@ let () = Bsb_log.setup ()

 let separator = "--"

-let watch_mode = ref false
+let no_deps_mode = ref false


The first build should be done with dependencies. Builds on change should be without dependencies.

DZakh · 2023-09-14T23:45:36Z

jscomp/bsb_exe/rescript_main.ml

@@ -84,13 +84,13 @@ let ninja_command_exit (type t) (ninja_args : string array) : t =
   ninja -C _build
 *)
 let clean_usage =
-  "Usage: rescript.exe clean <options>\n\n\
-   `rescript clean` only cleans the current project\n"
+  "Usage: rescript clean <options>\n\n\


Removed exe and updated the description. It's more relevant now, since the -with-deps is deprecated.

DZakh · 2023-09-14T23:46:11Z

jscomp/bsb_exe/rescript_main.ml

+      ("-w", unit_set_spec (ref false), "Watch mode");
+      ( "-ws",
+        string_set_spec (ref ""),
+        "[host]:port set up host & port for WebSocket build notifications" );
+      ("-verbose", call_spec Bsb_log.verbose, "Set the output to be verbose");


Sorted in the order:

Public

Deprecated

Internal

DZakh · 2023-09-14T23:46:56Z

jscomp/bsb_exe/rescript_main.ml

      ( "-regen",
        unit_set_spec force_regenerate,
        "*internal* \n\
         Always regenerate build.ninja no matter bsconfig.json is changed or \
         not" );
-      ("-verbose", call_spec Bsb_log.verbose, "Set the output to be verbose");
+      ("-no-deps", unit_set_spec no_deps_mode, "*internal* Needed for watcher to build without dependencies on file change");


I don't see a usecase for it, so I've added the flag as internal

DZakh · 2023-09-14T23:53:52Z

rescript

+      .listen(webSocketPort, webSocketHost);
+  }
+
+  function watchBuild(watchConfig) {


This function is not touched. Only the watchGenerated definition moved to a higher scope.

DZakh · 2023-09-14T23:55:36Z

rescript

+    return !(
+      fileName === ".merlin" ||
+      fileName.endsWith(".js") ||
+      fileName.endsWith(".mjs") ||
+      fileName.endsWith(".cjs") ||
+      fileName.endsWith(genTypeFileExtension) ||
+      watchGenerated.indexOf(fileName) >= 0 ||
+      fileName.endsWith(".swp")
+    );


I have a big question about the logic. Why not check only .res,.resi,.ml,.mli changes?
Also, since the whole condition is negated the watchGenerated.indexOf(fileName) >= 0 doesn't trigger rebuild on generated file change 😅

For example, if ReScript is used in a codebase mixed with ts. It'll recompile on every ts file change

Good question. Maybe @bobzhang can comment?

DZakh · 2023-09-14T23:55:59Z

rescript

-        if (postBuild) {
-          dlog(`running postbuild command: ${postBuild}`);
-          child_process.exec(postBuild);
-        }


DZakh · 2023-09-14T23:57:27Z

rescript

+  logStartCompiling();
+  delegateCommand(delegatedArgs, () => {
+    startWatchMode(withWebSocket);
+    buildFinishedCallback(0);


This line initializes file watchers.

DZakh · 2023-09-14T23:58:00Z

rescript

+    case "info":
+    case "clean": {
+      delegateCommand(process_argv.slice(2));
+      break;
+    }
+    case undefined:
+    case "build": {
+      logStartCompiling();
+      delegateCommand(process_argv.slice(2), logFinishCompiling);
+      break;
+    }


This way, we can separate the watcher-specific code.

DZakh · 2023-09-19T06:23:12Z

The PR is ready for review

cristianoc · 2023-09-19T07:24:36Z

@cknitt up for a review?

cknitt · 2023-09-19T15:09:27Z

Great work @DZakh! I'll test it tomorrow against our current project.

cknitt · 2023-09-19T15:13:09Z

jscomp/bsb_exe/rescript_main.ml

-  "Usage: rescript.exe clean <options>\n\n\
-   `rescript clean` only cleans the current project\n"
+  "Usage: rescript clean <options>\n\n\
+   `rescript clean` cleans build artifacts. It is useful for edge-case reasons in case you get into a stale build\n"


Not sure about the wording here or if we should mention edge cases/stale builds at all.

Maybe just

Suggested change

`rescript clean` cleans build artifacts. It is useful for edge-case reasons in case you get into a stale build\n"

`rescript clean` cleans build artifacts\n"

?

What do you think @cristianoc?

That's cleaner

Ok, then could you accept my change suggestion @DZakh?

cknitt · 2023-09-20T06:25:12Z

Great work @DZakh! I'll test it tomorrow against our current project.

Ok, our current project is a monorepo project with its own watcher, so I wasn't able to test the watch mode changes against it.

I tested briefly against an example project and everything seemed fine though.

DZakh · 2023-09-20T07:47:55Z

Done 👌

CHANGELOG.md

DZakh · 2023-09-21T19:16:13Z

I think it's ready to be merged

zth · 2023-09-26T20:30:07Z

@DZakh seems we missed our window and there's now a few conflicts. Care fixing and we can merge after?

Co-authored-by: Christoph Knittel <[email protected]>

DZakh · 2023-09-27T17:04:09Z

Done

DZakh commented Sep 14, 2023

View reviewed changes

cknitt reviewed Sep 19, 2023

View reviewed changes

DZakh force-pushed the watch-mode-clean-up branch from 63a5c58 to 40a81bc Compare September 20, 2023 07:47

cknitt reviewed Sep 20, 2023

View reviewed changes

CHANGELOG.md Outdated Show resolved Hide resolved

cknitt approved these changes Sep 20, 2023

View reviewed changes

DZakh and others added 4 commits September 27, 2023 20:03

Watch mode clean up

56b7649

Update clean command help

4d1f7fb

Update changelog

56c464b

Update CHANGELOG.md

70b514a

Co-authored-by: Christoph Knittel <[email protected]>

DZakh force-pushed the watch-mode-clean-up branch from 4a0890b to 70b514a Compare September 27, 2023 17:03

DZakh requested a review from cristianoc September 27, 2023 17:04

zth merged commit 7e2e81f into rescript-lang:master Sep 27, 2023
7 checks passed

fhammerschmidt mentioned this pull request Oct 2, 2023

Document v11 features. rescript-lang/rescript-lang.org#697

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ReScript cli clean up + watcher fix #6404

ReScript cli clean up + watcher fix #6404

DZakh commented Sep 14, 2023 •

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cknitt commented Sep 20, 2023 •

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DZakh commented Sep 20, 2023

DZakh commented Sep 21, 2023

zth commented Sep 26, 2023

DZakh commented Sep 27, 2023

		@@ -26,7 +26,7 @@ let () = Bsb_log.setup ()

		let separator = "--"

		let watch_mode = ref false

	`rescript clean` cleans build artifacts. It is useful for edge-case reasons in case you get into a stale build\n"
	`rescript clean` cleans build artifacts\n"

ReScript cli clean up + watcher fix #6404

ReScript cli clean up + watcher fix #6404

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DZakh commented Sep 14, 2023 • edited Loading

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DZakh commented Sep 19, 2023

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