ftd.main-package (variable) and ftd.is_app_mounted (function)
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amitu
reviewed
Jan 31, 2025
siddhantk232
changed the title
ftd.main-package (variable) and ftd.is_app_mounted (function)
WARN: the `ftd.main-package` does not work yet. It's stored in the `global` map in js output and it's not getting resolved when used in an ftd file. This should be key on `ftd` object itself. - `ftd.main-package`: A string variable that stores the name of the packaeg. This is useful to determine if a package is mounted in another package or if it's running standalone. - Refactor: Create `HostBuiltins` type and use it instead of Array of fixed sized type everywhere. This makes it easy to add new builtins
This allows to use the following in ftd code: ```ftd -- ftd.text: $ftd.main-package ```
This variable is used to support the optional second parameter (app) in `ftd.app-path` function. The `ftd.app-path` function now takes a second optional arg. This arg is used to construct app paths for any app that is mounted using `fastn.app` in FASTN.ftd.
We don't need this definition here. This function is only invoked internally through `ftd.app-path` function.
If a package has `lets-auth` app mounted. Then the following code will
show "Hello" as output:
```ftd
-- string app: lets-auth
-- ftd.text: Hello
if: { ftd.is_app_mounted(app) } ;; or ftd.is_app_mounted("lets-auth")
```
- Update the docs of `ftd.app-path` to mention the second `app` parameter. - Document `ftd.main-package` string variable - Document `ftd.is_app_mounted(app: string)` ftd function. This can be used to conditionally render things based on the mounting status of specific apps (using app package's system name)
`fastn` touches both the file system (through its fs routing) and the urls (since it's a webserver, duh). This might create a situation where people think `ftd.app-path` is something related to fs but it's really constructing the path relative to your website url. For this reason, this has been renamed to `ftd.app-url` instead.
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amitu
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Feb 1, 2025
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Demo video: https://youtu.be/IrfsVCy7Y0Y
TODO
ftd.main-packagevariableappparam toftd.app-pathftd.is_app_mountedfunctionftd.app-pathftd.main-packageftd.is_app_mountedftd.app-path->ftd.app-url