fix: resolve image tags and volume mounts for Linux containers on Windows

[lucasvdiepen]

Changes

Image tag resolution from container OS (9cc29ec)

RunnerImageTag derived its image platform prefix and build-module suffix from hostPlatform (Node's process.platform). On a Windows host running Docker Desktop in Linux-containers mode, hostPlatform is win32, so the constructor resolved windows--prefixed image tags — a tag the Linux daemon cannot pull, failing with invalid reference format.

• RunnerImageTag now destructures hostOS (the daemon-reported OS, resolved by Cli.resolveHostOS() → Docker.detectDaemonOs()) alongside hostPlatform.
• A new toNodePlatform(hostOS, hostPlatform) static method maps the daemon's OS string ('linux', 'windows', 'darwin') back to the Node-style platform string the existing getImagePlatformPrefixes / getTargetPlatformToTargetPlatformSuffixMap methods expect. When hostOS is unset, it falls back to hostPlatform for backward compatibility.
• The constructor stores the result as containerPlatform and passes it in place of hostPlatform to both methods.
• This also fixes StandaloneWindows64 target selection: on win32 the suffix map selected windows-il2cpp, but a Linux container cannot run IL2CPP for Windows — it now correctly falls through to windows-mono because the effective platform is linux, not win32.
• Nine new tests: four cross-OS container cases (ubuntu prefix, windows-mono selection, backward-compat fallback, windows hostOS) and five toNodePlatform unit tests.

Volume mount quoting (ec12940)

getLinuxCommand quoted volume mounts as two separate segments:

--volume "${home}":"${container}:z"

On a native Linux host the paths are POSIX and this works fine, but on a Windows host driving a Linux container the host paths contain a drive-letter colon (e.g. C:\Users\Runner). Docker's volume parser splits on the first unquoted colon to find the host:container boundary, so "C:\Users\Runner":"/root:z" is parsed as host=C, container=\Users\Runner, and Docker rejects it as an invalid reference. The documented form is a single quoted string with colons inside:

--volume "${home}:${container}:z"

Both the home and workspace mounts are updated; the cliDistPath mounts already used the single-quoted form. The corresponding test assertions are updated to match.

Checklist

• Read the contribution guide and accept the code of conduct
• Readme (updated or not needed)
• Tests (added, updated or not needed)

Summary by CodeRabbit

• Bug Fixes
  • Corrected Docker volume mount formatting in generated Linux commands for reliable handling of paths containing spaces, including Windows host paths.
  • Improved Unity runner image selection across operating systems, including correct platform prefixes and Windows image variants.
  • Added fallback behavior when the host operating system is unavailable or unrecognized, preserving the detected host platform.

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📒 Files selected for processing (2)

• src/model/docker.test.ts
• src/model/docker.ts

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📝 Walkthrough

Walkthrough

The pull request updates Linux Docker volume quoting and changes Unity runner image tag resolution to use the configured host operating system. Tests cover paths with spaces, cross-OS image selection, platform conversion, and fallback behavior.

Changes

Docker volume format

Layer / File(s)	Summary
Linux volume mount output and assertions src/model/docker.ts, src/model/docker.test.ts	The Linux Docker command now quotes each complete volume mount specification. Tests cover home, workspace, SSH agent, known hosts, and SSH key mounts, including Windows-host paths with spaces.

Runner platform resolution

Layer / File(s)	Summary
Host operating system mapping and image tag selection src/model/unity/runner/runner-image-tag.ts, src/model/unity/runner/runner-image-tag.test.ts	RunnerImageTag maps hostOS to a Node platform and uses the resolved platform for image prefixes and builder suffixes. Tests cover cross-OS containers, direct mappings, and fallback behavior.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~15 minutes

Change: Bug fix

Merge Risk: ⚪ Minimal · up to fed5e

The cross-OS Docker updates have no evidenced merge-blocking risk and are mergeable after normal checks.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the two primary changes: image tag resolution and volume mount fixes for Linux containers on Windows hosts.
Description check	✅ Passed	The description follows the required template, explains both changes, documents the test updates, and completes the checklist.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 4…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Inline comments:
In `@src/model/docker.ts`:
- Around line 283-284: Update getLinuxCommand’s Windows/PowerShell Docker volume
arguments to quote each complete mount specification, including the SSH agent
and public-keys mounts and the existing home and workspace mounts, so paths
containing spaces remain a single argument. Add a regression assertion covering
a Windows path such as C:/Program Files/.

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ℹ️ Review info

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Review profile: CHILL

Plan: Advanced

Run ID: 6f69e304-8d6e-4a55-8728-fc03b12a8cb3

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📒 Files selected for processing (4)

• src/model/docker.test.ts
• src/model/docker.ts
• src/model/unity/runner/runner-image-tag.test.ts
• src/model/unity/runner/runner-image-tag.ts

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