Reduce size of slug generated by Anvil

[rehno-lindeque]

Right now uploading a large project to anvil is extremely slow - easily 30 minutes or more I think. This is because the dist/ and .cabal-sandbox/ directories can get very large (I think... currently these directories weigh in at around 370MB for our project).

One thing I attempted was to add these two paths to the .slugignore file. At first I thought that this was working, but it seems like I was fooled by the anvil upload continuing where it left off.

I also tried

heroku build -r https://github.com/username/project.git -b https://github.com/begriffs/heroku-buildpack-ghc.git#master

instead of

heroku build -r -b https://github.com/begriffs/heroku-buildpack-ghc.git#master

Don't know if there are any better options - would be great if anvil had some kind of .anvilignore configuration. It would also be great to decrease the size of the slug. I'll add comments to this issue as I figure things out...

[puffnfresh]

The README should make it clear to do a git clean -fdx or just clean up the local directory before using the Anvil build. I spent a while trying to figure out what I was doing wrong when I saw it was going to take 3.5 hours to upload my app!

Running the following is now letting it do things:

$ cabal sandbox delete
$ rm -r dist

[rehno-lindeque]

Oh thank you so much! I'm going to try that now. Too bad that it forces you to rebuild again locally...

[rehno-lindeque]

Currently using

mkdir -p /tmp/deploy-stash ; mv .cabal-sandbox /tmp/deploy-stash  ; mv dist /tmp/deploy-stash

stash my compiled files, and

mv /tmp/deploy-stash/.* . ; mv /tmp/deploy-stash/* .

to restore them. (It takes a really long time to rebuild everything)

[rehno-lindeque]

@begriffs Shall I remove "the large slug" bit from this issue? It might make more sense to have some more concrete issues like #2 and #44 addressing this.

I'm thinking that some kind of .anvilignore file would really be a much less hacky solution to this issue, so I created an issue here ddollar/heroku-anvil#19

[begriffs]

The cleanup pre-anvil steps are noted in the readme now. I'm going to close this issue since we have more specific ones now.