Pass through filename as modulename to precompile

[chiragpat]

Why

Passing in moduleName will allow astPlugins to have access to the name of the current file they are processing. This will enable them to provide friendly error messages.

How

• Pass through state.file.opts.fileName to calls to the precompile function

[rwjblue]

Hmph. I thought this was already available? 🤔

[chiragpat]

Nope it got removed, not sure exactly when it happened.

[rwjblue]

OK, I was wrong. ember-cli-htmlbars always passes moduleName (not in meta) for stand alone template files (non-colocated)

https://github.com/ember-cli/ember-cli-htmlbars/blob/0e3ef495412bb75096d1468d0771e97c0afb8d1b/lib/template-compiler-plugin.js#L71

And for co-located templates in Ember land:

https://github.com/ember-cli/ember-cli-htmlbars/blob/0e3ef495412bb75096d1468d0771e97c0afb8d1b/lib/colocated-broccoli-plugin.js#L126-L132

Ember then copies the top level moduleName property into meta:

https://github.com/emberjs/ember.js/blob/61be2e1edf820df1c7bbb245a5cbe02f4a875805/packages/ember-template-compiler/lib/system/compile-options.ts#L38-L43