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https://issues.apache.org/jira/browse/CAMEL-25389?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on CAMEL-25389 stopped by Claus Ibsen.
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> camel-jbang - Exit code contract, stderr for errors, central error handling
> ---------------------------------------------------------------------------
>
> Key: CAMEL-25389
> URL: https://issues.apache.org/jira/browse/CAMEL-25389
> Project: Camel
> Issue Type: Sub-task
> Components: camel-jbang
> Reporter: Claus Ibsen
> Assignee: Claus Ibsen
> Priority: Major
> Fix For: 4.24.0
>
>
> * Add {{CliExitCode}} constants (0,1,2,3,4,70) and {{CliException(code,
> message)}}.
> * Install a picocli execution-exception handler and exit-code mapper in
> {{CamelJBangMain}}: {{CliException}} prints one {{ERROR:}} line on stderr;
> other exceptions exit 70 with stack trace on stderr; stack traces for 1/3/4
> only with {{CAMEL_DEBUG=true}}/{{--verbose}}.
> * {{Printer}} gets an error channel ({{printErr}}, {{printWarn}},
> {{printTip}}) that goes to stderr; {{StringPrinter}} captures stdout and
> stderr separately.
> * Move the ~25 {{println("Error: ...")}} sites to {{printErr}}, and non-error
> text out of {{printErr}} (e.g. {{transform dataweave}} summary).
> * "Plugins (not installed)" banner: stderr, and suppressed without a TTY.
> * Unknown command matching a plugin name must not exit 0 after
> auto-installing.
> * Parent commands ({{transform}}, {{eval}}, {{catalog}}, {{cmd}}, {{config}},
> {{infra}}, {{plugin}}, {{update}}, {{version}}, {{dependency}}) use their own
> {{CommandLine}} so help lists subcommands and the child's exit code
> propagates.
> * Replace {{return -1}} (exit 255) with proper codes.
> * New docs page "Exit codes and machine-readable output"; create
> {{camel-4x-upgrade-guide-4_24.adoc}} entry.
> _Claude Code on behalf of davsclaus (Claus Ibsen)_
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