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Trailing colons in env breaks things #929

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Jan 16, 2024
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2 changes: 1 addition & 1 deletion src/prefab/construct-env.test.ts
Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,7 @@ Deno.test("construct_env.ts", async runner => {
try {
const rv = await specimen({ installations })
assertEquals(rv['FOO_FLAGS'], "bar bar bar bar ${FOO_FLAGS} baz${FOO_FLAGS} baz${FOO_FLAGS} baz${FOO_FLAGS} baz") //FIXME lol
assertEquals(rv['PATH'], `/opt/bin:${tmp.join('foo/v2.3.4/bin')}:\${PATH}`)
assertEquals(rv['PATH'], `/opt/bin:${tmp.join('foo/v2.3.4/bin')}\${PATH:+:$PATH}`)
} finally {
stub2.restore()
tmp.rm({recursive: true})
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4 changes: 4 additions & 0 deletions src/prefab/construct-env.ts
Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,10 @@ export default async function(pkgenv: { installations: Installation[] }) {

for (const key in rv) {
rv[key] = rv[key].replaceAll(new RegExp(`\\$${key}\\b`, 'g'), `\${${key}}`)
// don’t end with a trailing `:` since that is sometimes interpreted as CWD and can break things
// instead of `foo:${PATH}` we end up with `foo${PATH:+:PATH}` which is not POSIX but works
// with all realy shells to avoid the trailing `:`
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s/realy/really/

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lol not even sure what I meant to say. “Really” doesn't make sense

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hm, actually, it's probably real.

rv[key] = rv[key].replaceAll(new RegExp(`:\\$\{${key}}`, 'g'), `\${${key}:+:$${key}}`)
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this is succinct, but isn't it probably safer to do:

  .replaceAll(/::/, ':')
  .replace(/^:/, '')
  .replace(/:$/, '')

?

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Yeah, you’re right. This isn’t good enough.

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I didn't bother with some of these as we construct this env ourselves. The runtime env from the package.yml could in theory cause a preceding : I guess.

}

return rv
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