id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,pull_request,body,repo,type,active_lock_reason,performed_via_github_app,reactions,draft,state_reason
705057955,MDU6SXNzdWU3MDUwNTc5NTU=,969,"Add --tar option to ""datasette publish heroku""",1448859,closed,0,,5971510,3,2020-09-20T06:54:53Z,2020-10-08T23:55:59Z,2020-10-08T23:30:59Z,NONE,,"This issue is about how best to pass additional options to tools used for publishing datasettes. A concrete example is wanting to pass the `--tar` flag to the heroku CLI tool. I think there are at least two options for doing this: documentation for each publishing tool to explain how to set flags via env variables (if possible) or building a mechanism that lets users pass additional flags through datasette.

When using `datasette publish heroku binder-launches.db --extra-options=""--config facet_time_limit_ms:35000 --config sql_time_limit_ms:35000"" --name=binderlytics --install=datasette-vega` to publish https://binderlytics.herokuapp.com/ the following error happens:

```
 ›   Warning: heroku update available from 7.42.1 to 7.43.0.
 ›   Warning: heroku update available from 7.42.1 to 7.43.0.
 ›   Warning: heroku update available from 7.42.1 to 7.43.0.
Setting WEB_CONCURRENCY and restarting ⬢ binderlytics... done, v13
WEB_CONCURRENCY: 1
 ›   Warning: heroku update available from 7.42.1 to 7.43.0.
 ▸    Couldn't detect GNU tar. Builds could fail due to decompression errors
 ▸    See https://devcenter.heroku.com/articles/platform-api-deploying-slugs#create-slug-archive
 ▸    Please install it, or specify the '--tar' option
 ▸    Falling back to node's built-in compressor
buffer.js:358
    throw new ERR_INVALID_OPT_VALUE.RangeError('size', size);
    ^

RangeError [ERR_INVALID_OPT_VALUE]: The value ""3303763968"" is invalid for option ""size""
    at Function.alloc (buffer.js:367:3)
    at new Buffer (buffer.js:281:19)
    at Readable.<anonymous> (/Users/thead/.local/share/heroku/node_modules/archiver-utils/index.js:39:15)
    at Readable.emit (events.js:322:22)
    at endReadableNT (/Users/thead/.local/share/heroku/node_modules/readable-stream/lib/_stream_readable.js:1010:12)
    at processTicksAndRejections (internal/process/task_queues.js:84:21) {
  code: 'ERR_INVALID_OPT_VALUE'
}
```

After installing GNU tar with `brew install gnu-tar` and modifying `datasette/publish/heroku.py` to include the `--tar=/path/to/gnu-tar` publishing works.

I think the problem occurs once your heroku slug reaches a certain size. At least when I add only a few 100 entries to the datasette then the error does not occcur.

datasette version 0.49.1
OSX 10.14.6 (18G103)",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/969/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed