The client switcher built every command as "<client> pull <ref>". That is
valid for docker, podman, buildah and nerdctl, but crane requires a
destination:
$ crane pull seamark.cr/user/bench8x1:v2
Error: requires at least 2 arg(s), only received 1
So selecting crane handed the user a command that cannot run. pullPrefix is a
prefix-only helper, which is precisely why it could not express this; add a
matching pullPostfix that returns " <image>.tar" for crane and "" for
everything else, including "none" (image reference only), which must get
neither prefix nor postfix.
Both render paths change together, since fixing one leaves the bug visible in
the other: the Go template helper paints first, and updatePullCommand in
app.js re-renders when the dropdown changes.
Repository names may contain slashes, so only the last path segment is used —
otherwise the destination would name a subdirectory that does not exist. A
name ending in "/" yields no destination at all rather than a bare ".tar",
on the grounds that a visibly wrong-arity command beats silently writing a
hidden file. That input is not reachable through the real repo-name path.
The test asserts the whole command string rather than just the postfix, so it
covers the prefix/postfix interaction and the "none" case where both vanish.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PDqoCE1j3njokkZ9b1C5n9
Evan JarrettandClaude Opus 5