Revamp command duration helper/plugin #1906
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gaelicWizard
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I've just discovered cmd-returned-notify.plugin and now I'm confused why there's two of these...? |
So, |
NoahGorny
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Aug 3, 2021
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I have left a comment. Also, for some reason, this patch does not for me, the preexec function seems to not execute.. Does this work on your end @gaelicWizard ?
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I'm marking this draft b/c I think I'm going to try to just merge with the plugin. Use one function to store the start time, then let the plugin and the theme separately use the same variable for (a) beep, or (b) prompt display. |
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I've had to rebase on my |
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davidpfarrell
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NoahGorny
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Rebased on current master |
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Rebased & ready! |
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BATS error should be fixed by #2105. |
Calculate the position (from 1 to 12) of the hour hand on the clock emoji used for the _command_duration string. Expressly handle COMMAND_DURATION_COLOR as blank when undefined.
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Fallback to `$SECONDS` for older versions of _Bash_. Instead of shortcircuiting the definition, just short-circuit the function. This allows the variable to be set later, e.g. on theme change.
Use `$EPOCHREALTIME` (or `$SECONDS`) built-in variable provided by Bash instead of `date +%s`. We're only measuing the difference in seconds, so avoid both the binary invocation as well as the subshell. Alsö, Reduce environmental pollution by not exporting every variable, and unsetting when done. Change variable names to match lib/command-duration Remove `preexec_return_notification()` in favor of `lib/command-duration`'s `_command_duration_pre_exec()`. This should now use the same preexec hook and variables as the theme library `command_duration`. tests: handle nanoseconds
Rename the `theme/command_duration.theme` file as it's not really got anything to do with theming or SCM.
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Description
Combine
themes/command_duration.theme.bashandplugins/cmd-returned-notify.plugin.bash, and rewrite them to use$EPOCHSECONDS(or$SECONDSon older Bash) while eliminating temporary files on disk.Motivation and Context
Removing the temp file reduces complexity (no need to locate $TMPDIR, read file back), reduces bug surface (what happens if /tmp cleaner runs before prompt returns?), and improves performance (no need to touch the disk!). Adopting
$EPOCHSECONDSremoves entirely the need for subshells or externaldateinvocation, improving performance and reducing points of failure. Sharing the preexec hook reduces total hooks running, and reduces duplicate code.And, of course,
command_durationdidn't work at all on Mac OS X since BSDdatedoesn't support%1N; now it works perfectly on both Mac and Linux (and BSD!) and doesn't usedateat all.How Has This Been Tested?
This change is live in my branch on my system now.
Types of changes
Checklist:
clean_files.txtand formatted it usinglint_clean_files.sh.