Feature request: Output some build results

[exalted]

On a successful run esbuild CLI will currently output nothing and exit with 0 status code.

This is GREAT actually, however I'd appreciate some output either via --log-level=info or a new flag (e.g., --verbose).

For the most part I am looking for some output which indicates which files have been bundled (source & destination), how much it took to process each file and overall time spent, etc.

Thanks.

[evanw]

Thanks for asking for this. This has been a request in the past from others as well and is something I have also wanted on occasion. I just added a new flag for this: --summary. You can see an example of what it looks like in the release notes. This feature will go out with the next release.

I chose --summary instead of --verbose because I'd like to reserve --verbose for verbose debugging output if it's necessary in the future. And I didn't include the time to process each file in the summary because that's not something I can measure. Files are processed in parallel instead of sequentially and many intermediate steps are shared between output files.

[exalted]

Looks neat @evanw . Thank you! 🙂

[exalted]

I personally don't use --serve, however I wonder if this kind of output would be useful in that as well (i.e., if f702341 doesn't already cover that as well). :two-cents:

[saramorillon]

Hello, is this feature available? I get this error when I try to use it:

[evanw]

This option was removed. Instead, esbuild now just always prints a summary by default. This has been the case for over a year now. This change happened in esbuild version 0.9.0, released in March 2021.

[saramorillon]

Hello @evanw , thank you for your answer. I don't see a summary when I use esbuild v0.15.13. Here is my build script:

require('esbuild').build({
  entryPoints: ['src/index.ts'],
  bundle: true,
  outdir: 'dist',
  minify: true,
  sourcemap: true,
  watch: true,
})

Am I doing something wrong?
(Please note that I'm new to esbuild)

[evanw]

You are missing logLevel: "info". The log level only defaults to info for the CLI. It defaults to warning when using the JS build API, so you'll need to set it to info if you want to see info log messages.

[saramorillon]

Thanks a lot, it's working now!