fix(auth): let chainctl write to terminal for interactive login#2276
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If I'm not authenticated already, `melange` will hang when I start a build that requires auth. I can see that it has forked a `chainctl` process, which I run in `--headless` mode, but no device-login URL gets emitted to my terminal. This is because `apko` is discarding stderr. Stream chainctl's stderr to the terminal when stderr is a TTY, so the login URL (and any errors) are visible. Keep discarding it in non-interactive contexts (CI/logs) to preserve the original intent. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Signed-off-by: dann frazier <dann.frazier@chainguard.dev>
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If I'm not authenticated already,
melangewill hang when I start a build that requires auth. I can see that it has forked achainctlprocess, which I run in--headlessmode, but no device-login URL gets emitted to my terminal. This is becauseapkois discarding stderr.Stream chainctl's stderr to the terminal when stderr is a TTY, so the login URL (and any errors) are visible. Keep discarding it in non-interactive contexts (CI/logs) to preserve the original intent.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: dann frazier <dann.frazier@chainguard.dev>