On Thu, 9 Apr 2026 14:26:51 GMT, Ivan Bereziuk <[email protected]> wrote:
>> I propose a Bash auto-completion script for the `jcmd` tool. It will >> simplify the most tedious part of `jcmd` tool usage -selecting >> <PID|main-class> and the command name. >> >> To determine auto-completion candidates, the script makes intermediate calls >> to `jcmd` and then parses the output: >> * `jcmd -l` to retrieve the list of running JVM processes; >> * `jcmd <PID> help` to get the list of available diagnostic commands; >> >> The "-o nosort" is set to preserve natural ordering of candidates: The >> resulting order of completion candidates printed, on double-`TAB` is >> structured: the JVM identifier (<main-class | path-to-jar>) appears >> immediately after the corresponding PID, maintaining a clear and meaningful >> association. >> >> Example with 2 JVMs running: >> >> $ jcmd -l >> 91936 jdk.jcmd/sun.tools.jcmd.JCmd -l >> 91668 install/MyApp.jar >> 91769 EventGeneratorLoop 100 >> $ jcmd <TAB_key_press> >> -l --help 91668 >> install/MyApp.jar 91769 EventGeneratorLoop >> >> >> Overall it should greatly improve QoL for `jcmd` Users. >> >> --------- >> - [ ] I confirm that I make this contribution in accordance with the >> [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). > > Ivan Bereziuk has updated the pull request with a new target base due to a > merge or a rebase. The incremental webrev excludes the unrelated changes > brought in by the merge/rebase. The pull request contains eight additional > commits since the last revision: > > - Merge branch 'master' into 8357439_bash_autocomplete_for_jcmd > - copy the autocompletion script to the jdk image > - move script in bash-completion/ folder and remove extention > - moved the script from man to conf folder > - declare functions consistently > - more clenup > - copyright header. minor cleanup > - 8357439: add bash autocompletion for jcmd JDK/conf/bash-completion looks like the most appropriate place we have, but right it's not the same purpose as the other files in there. This file could be used/sourced from where it stands, or copied into a system location like /usr/share/bash-completion/completions/jcmd so maybe a release note with short instructions will explain the usage. ------------- PR Comment: https://git.openjdk.org/jdk/pull/30606#issuecomment-4222493760
