Bug: watch mode does not work since 2.8.0-dev.20180314

[taoqf]

TypeScript Version: 2.8.0-dev.20180316

Search Terms:

Code

tsc -w

Expected behavior:

Starting compilation in watch mode...
Compilation complete. Watching for file changes.

Actual behavior:
Starting compilation in watch mode...

and no files generated

Playground Link:

Related Issues:

[taoqf]

I tried 2.7.2, it works fine.

[taoqf]

Am I missing any options in v2.8 ?

[taoqf]

Besides, CPU keep highly occupied.
2.8.0-dev.20180318 has the same issue, too.

[taoqf]

2.8.0-dev.20180308 works fine.
this issue start from 2.8.0-dev.20180314.

[DanielRosenwasser]

Do you have a sample project we could take a look at at all that exhibits this behavior?

@sheetalkamat @RyanCavanaugh perhaps issues you're looking into might be be related here.

[taoqf]

https://github.com/taoqf/sample
this will do.
it works fine if I remove dependence webpack-stream, or do not import symbols from another lib.
It doesn't matter if not-exist exist or not.

[sheetalkamat]

@taoqf What are the exact steps you are following.
Here is what I did with your sample project

c:\github\sample>node c:\TypeScript\built\local\tsc.js -w --preserveWatchOutput
[09:24:12] Starting compilation in watch mode...


src/sample.ts:1:1 - error TS6133: 'fun' is declared but its value is never read.

1 import { fun } from 'not-exist';
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


src/sample.ts:1:21 - error TS2307: Cannot find module 'not-exist'.

1 import { fun } from 'not-exist';
                      ~~~~~~~~~~~


src/sample.ts:3:7 - error TS6133: 'no' is declared but its value is never read.

3 const no = 'fd-w000001';
        ~~


[09:24:13] Compilation complete. Watching for file changes.

Ran ````npm install``` after this from another command prompt. There is no additional output since there is no change in program with those installs..

Changed no to no2 and I see new errors being presented as:

[09:26:02] File change detected. Starting incremental compilation...


src/sample.ts:1:1 - error TS6133: 'fun' is declared but its value is never read.

1 import { fun } from 'not-exist';
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


src/sample.ts:1:21 - error TS2307: Cannot find module 'not-exist'.

1 import { fun } from 'not-exist';
                      ~~~~~~~~~~~


src/sample.ts:3:7 - error TS6133: 'no2' is declared but its value is never read.

3 const no2 = 'fd-w000001';
        ~~~


[09:26:02] Compilation complete. Watching for file changes.

New outputs are also generated correctly and don't see any impact on cpu cycles.

Is there something I am missing.

[taoqf]

It like is the same issue like microsoft/vscode#45952 (comment)
try this.

npm i -g cnpm
cnpm i
./node_modules/.bin/tsc -w --preserveWatchOutput

If I install node_modules use npm i, it will be ok.

see cnpm

[sheetalkamat]

Followed your steps and yet dont see issue with cpu or reporting error or file generation?

c:\github\sample>npm i -g cnpm
npm WARN deprecated [email protected]: If using 2.x branch, please upgrade to at least 2.1.6 to avoid a serious bug with socket data flow and an import issue introduced in 2.1.0
C:\Users\shkamat\AppData\Roaming\npm\cnpm -> C:\Users\shkamat\AppData\Roaming\npm\node_modules\cnpm\bin\cnpm
+ [email protected]
added 778 packages in 38.879s

c:\github\sample>cnpm i
/ [1/2] Installing static-extend@^0.1.1platform unsupported [email protected] › [email protected] › [email protected] › [email protected] › fsevents@^1.1.2 Package require os(darwin) not compatible with your platform(win32)
[fsevents@^1.1.2] optional install error: Package require os(darwin) not compatible with your platform(win32)
√ Installed 2 packages
√ Linked 294 latest versions
√ Run 1 scripts
Recently updated (since 2018-03-16): 7 packages (detail see file c:\github\sample\node_modules\.recently_updates.txt)
√ All packages installed (327 packages installed from npm registry, used 27s, speed 572.18kB/s, json 296(4.01MB), tarball 11.21MB)

c:\github\sample>node_modules\.bin\tsc --w --preserveWatchOutput
[10:38:07] Starting compilation in watch mode...


======== Resolving module 'not-exist' from 'c:/github/sample/src/sample.ts'. ========
Explicitly specified module resolution kind: 'NodeJs'.
Loading module 'not-exist' from 'node_modules' folder, target file type 'TypeScript'.
Directory 'c:/github/sample/src/node_modules' does not exist, skipping all lookups in it.
File 'c:/github/sample/node_modules/not-exist.ts' does not exist.
File 'c:/github/sample/node_modules/not-exist.tsx' does not exist.
File 'c:/github/sample/node_modules/not-exist.d.ts' does not exist.
Directory 'c:/github/sample/node_modules/@types' does not exist, skipping all lookups in it.
Directory 'c:/github/node_modules' does not exist, skipping all lookups in it.
Directory 'c:/node_modules' does not exist, skipping all lookups in it.
Loading module 'not-exist' from 'node_modules' folder, target file type 'JavaScript'.
Directory 'c:/github/sample/src/node_modules' does not exist, skipping all lookups in it.
File 'c:/github/sample/node_modules/not-exist.js' does not exist.
File 'c:/github/sample/node_modules/not-exist.jsx' does not exist.
Directory 'c:/github/node_modules' does not exist, skipping all lookups in it.
Directory 'c:/node_modules' does not exist, skipping all lookups in it.
======== Module name 'not-exist' was not resolved. ========
src/sample.ts:1:1 - error TS6133: 'fun' is declared but its value is never read.

1 import { fun } from 'not-exist';
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


src/sample.ts:1:21 - error TS2307: Cannot find module 'not-exist'.

1 import { fun } from 'not-exist';
                      ~~~~~~~~~~~


src/sample.ts:3:7 - error TS6133: 'no' is declared but its value is never read.

3 const no = 'fd-w000001';
        ~~


[10:38:08] Compilation complete. Watching for file changes.


[10:39:26] File change detected. Starting incremental compilation...


src/sample.ts:1:1 - error TS6133: 'fun2' is declared but its value is never read.

1 import { fun2 } from 'not-exist';
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


src/sample.ts:1:22 - error TS2307: Cannot find module 'not-exist'.

1 import { fun2 } from 'not-exist';
                       ~~~~~~~~~~~


src/sample.ts:3:7 - error TS6133: 'no' is declared but its value is never read.

3 const no = 'fd-w000001';
        ~~


[10:39:26] Compilation complete. Watching for file changes.

[taoqf]

Could you please try Linux? I use this on Debian, they have different behavior.

[sheetalkamat]

I was able to get this to repro on linux and have a repro. I have rough idea where this is coming from but working on getting exact repro so i can fix it correctly. Thanks.
Note: The issue is with linux where in node's watch directory doesnt support the recursive directory watcher and the new implentation watches child directories but is exploding when doing cnpm i since it creates bunch of sym links resulting in i suspect circularity which we arent handling well.

[taoqf]

Will this be fixed in next published version?

[taoqf]

Thanks, I've tried version 2.9.0-dev.20180330, it's OK now.