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Re: PROMPT_COMMAND is not executed after edit-and-execute-command
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From: |
Chet Ramey |
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Subject: |
Re: PROMPT_COMMAND is not executed after edit-and-execute-command |
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Date: |
Thu, 18 Mar 2021 15:49:33 -0400 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 |
On 3/18/21 11:29 AM, earnestly wrote:
When using edit-and-execute-command to edit the command-line I've
noticed that PROMPT_COMMAND is not evaluated upon returning to the
prompt
It shouldn't be. Bash executes PROMPT_COMMAND before it calls readline to
read the first line of a command.
edit-and-execute-command is a bindable readline command. All the commands
executed as a result of it happen in the context of a single call to
readline(), and it is readline that redisplays the prompt when edit-and-
execute-command completes. The readline() call doesn't return the line at
that point.
Since readline prints the prompt as part of redisplay, and it doesn't know
anything about PROMPT_COMMAND or command execution, it doesn't execute it.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/