stache done-autorender breaks treeshaking

[pYr0x]

if you using a doneJS app and you want to create a build you use "main": "stache-treeshaking/index.stache!done-autorender" as main during build.

now treeshaking will not work anymore. functions f() and b() will be in the dest file, but only f() is used.

if you using the view model file like main: "~/app" as main, treeshaking work. only f() is in the dest file

see example app https://github.com/pYr0x/stache-treeshaking see the build file https://github.com/pYr0x/stache-treeshaking/blob/master/build.js#L9 to change to app.js

[matthewp]

If you don't mind trying, what happens if you change this line to if(true) {, does it work? This disables the build-time tree-shaking (rollup) but not the tree-shaking that occurs within steal. I sort of want to remove rollup because it causes many of these issues I think.

[pYr0x]

if i change it to true and run again with stache-treeshaking/index.stache!done-autorender as main i will get the same result. b() is still in dest file. now even if i use app.js b() is present

[pYr0x]

@matthewp any progress on this issue?

[matthewp]

No, sorry for not replying though. I understand the issue now. For some reason it is not seeing that foo is only imported by another ES module. It should tree-shake in that situation, I believe. I'll try and check it out today.

[matthewp]

Breaking test shown here: https://github.com/stealjs/steal-tools/commit/6255900af23188713485246b029b49f7132e69e0

Looking into what is going on.

[matthewp]

PR: https://github.com/stealjs/steal-tools/pull/1070

[matthewp]

2.0.5: https://github.com/stealjs/steal-tools/releases/tag/v2.0.5

[pYr0x]

thank you very much!