Habitat: pkgPathFor writes error msg when there is integer in ServiceConfig

[bodymindarts]

When using {{pkgPathFor}} the error msg

shield-agent.default(HK): Failed to compile init hook: hab-sup(ER)[src/error.rs:349:8]: Error rendering "hook" line 19, col 7: "pkgPathFor" can only be used on a template bound to a service config.

is being thrown.

After debugging this a bit the issue is actually only due to a problem deserializing integers. The hook is getting rendered correctly even though the error is being displayed.

This is the printout of the error comming from this line.

hab-sup(TP): Deserialize error: Syntax(Message("invalid type: integer8080, expected any valid TOML value"), 0, 0)

the value in the context struct is:

"cfg": Object({"port": Number(PosInt(8080))}),...

https://github.com/habitat-sh/habitat/pull/1788 mentions there being an issue in regards to deserializing integers but says bumping to serde 0.9.x should fix it. By now serde has been updated but the issue remains.

[bodymindarts]

Perhaps @smurawski has some insight?
For now a workaround seems to be to use strings instead of integers in config.

[smurawski]

We did a bit of debugging/exploration and have a test that reproduces this behavior. I'm going to change our approach pkg_path_for is using and rather than hydrating this large complex ServiceConfig struct, traverse the JSON::value to the PackageInstall struct and hydrate just that (since that's the minimum we need to get the information that the helper needs.

[reset]

Closed by #2077