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fix(bridge): preserve caller mix paths #6

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Merged
dannote merged 1 commit into from
Sep 13, 2026
Merged

fix(bridge): preserve caller mix paths #6

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5 changes: 0 additions & 5 deletions packages/extension/src/embedded/stdio-process.ts
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Original file line number Diff line number Diff line change
@@ -1,6 +1,4 @@
import * as childProcess from 'node:child_process'
import * as os from 'node:os'
import * as path from 'node:path'
import { fileURLToPath } from 'node:url'

import {
Expand Down Expand Up @@ -353,12 +351,9 @@ function ensureBundledBridgeDeps(projectCwd: string, bridgeCwd: string): string
}

function mixChildEnv(projectCwd: string): NodeJS.ProcessEnv {
const mixHome = path.join(os.homedir(), '.mix')
return {
...process.env,
MIX_ENV: process.env.PI_ELIXIR_BRIDGE_MIX_ENV || 'dev',
MIX_HOME: mixHome,
MIX_ARCHIVES: path.join(mixHome, 'archives'),
PI_ELIXIR_PROJECT_CWD: projectCwd
}
}
Expand Down
22 changes: 20 additions & 2 deletions packages/extension/test/beam-client.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -230,6 +230,7 @@ describe('resolveUrl', () => {

afterEach(() => {
resetModuleState()
vi.unstubAllEnvs()
vi.restoreAllMocks()
vi.useRealTimers()
})
Expand Down Expand Up @@ -299,7 +300,12 @@ describe('resolveUrl', () => {
expect(fetch).toHaveBeenCalled()
})

it('returns null and starts embedded when no external MCP server found', async () => {
it('preserves caller Mix paths when starting embedded', async () => {
const mixHome = '/mise/elixir/1.20.1-otp-28/.mix'
const mixArchives = `${mixHome}/archives`
vi.stubEnv('MIX_HOME', mixHome)
vi.stubEnv('MIX_ARCHIVES', mixArchives)
vi.stubEnv('PI_ELIXIR_BRIDGE_MIX_ENV', 'test')
vi.mocked(fetch).mockRejectedValue(new Error('connection refused'))
vi.mocked(fs.readFileSync).mockImplementation(() => {
throw new Error('ENOENT')
Expand All @@ -313,13 +319,25 @@ describe('resolveUrl', () => {
vi.mocked(childProcess.spawn).mockReturnValue(fakeProc)

const result = await resolveUrl('/embedded-project')
const expectedMixEnv = {
MIX_ARCHIVES: mixArchives,
MIX_ENV: 'test',
MIX_HOME: mixHome,
PI_ELIXIR_PROJECT_CWD: '/embedded-project'
}

expect(result).toBeNull()
expect(childProcess.execFileSync).toHaveBeenCalledWith(
'mix',
['deps.get'],
expect.objectContaining({ env: expect.objectContaining(expectedMixEnv) })
)
expect(childProcess.spawn).toHaveBeenCalledWith(
'mix',
['run', '-e', 'Pi.Transport.Stdio.start()'],
expect.objectContaining({
cwd: expect.stringContaining('packages/bridge'),
env: expect.objectContaining({ PI_ELIXIR_PROJECT_CWD: '/embedded-project' })
env: expect.objectContaining(expectedMixEnv)
})
)
})
Expand Down
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