add 'make watch-frontend' and expand docs

[silverwind]

Not perfect as it requires two terminals, but it's still builds much faster then running the full build. Also, the dev mode of webpack enables additional logging in the browser console, so this should be the go-to mode for frontend development.

[everhopingandwaiting]

need it

[codecov-io]

Codecov Report

Merging #10931 into master will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #10931   +/-   ##
=======================================
  Coverage   43.50%   43.50%           
=======================================
  Files         597      597           
  Lines       83916    83916           
=======================================
+ Hits        36504    36510    +6     
+ Misses      42903    42899    -4     
+ Partials     4509     4507    -2     

Impacted Files	Coverage Δ
modules/git/repo_language_stats.go	66.17% <0.00%> (-4.42%)	⬇️
modules/git/command.go	86.95% <0.00%> (-2.61%)	⬇️
services/pull/check.go	52.43% <0.00%> (-1.22%)	⬇️
modules/queue/workerpool.go	56.93% <0.00%> (-1.07%)	⬇️
services/pull/temp_repo.go	31.62% <0.00%> (ø)
models/error.go	31.02% <0.00%> (+0.53%)	⬆️
modules/git/repo.go	48.11% <0.00%> (+0.83%)	⬆️
services/pull/pull.go	35.88% <0.00%> (+0.88%)	⬆️
modules/process/manager.go	78.31% <0.00%> (+3.61%)	⬆️
modules/git/utils.go	70.14% <0.00%> (+4.47%)	⬆️
... and 1 more

---

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[lafriks]

Imho built in option would be better

[silverwind]

@lafriks yes a single command would be preferred but doing that also opens up issue that the runtime depends on the existance node_modules which I don't really like because gitea is a single-binary distribution that should be able to run standalone.

[lafriks]

@silverwind not really, it could be special flag to gitea web command that you can run that would start npx webpack. Something like ./gitea web --dev

[lafriks]

or we could even detect if gitea is started in development mode and node_modules directory exists in current working directory and only than start npx webpack in background

[silverwind]

Yeah that could be added later (and this task be removed again), but I still think it's worthwile to have now (at least it saves me from typing that long command every time 😉).

[guillep2k]

If I may, I'd rather not pollute the binary with dev options. It's not likely that anyone would not have the source files when doing front-end development, unless of course they're only working on a UI theme; but even then, the .less files are source code too.

[6543]

add a Make target is way more better than a bigger gitea binary and more dependencys

[guillep2k]

Ping LG-TM