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feat(fish): Enable left and right transience (#4204)

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* feat(fish): Enable left and right transience

* Update README.md

* Mention limitation
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Rashil Gandhi 2022-09-09 18:26:33 +05:30 committed by GitHub
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2 changed files with 79 additions and 2 deletions
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35
docs/advanced-config/README.md
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@ -71,6 +71,41 @@ end
load(io.popen('starship init cmd'):read("*a"))()
```
## TransientPrompt and TransientRightPrompt in Fish
It is possible to replace the previous-printed prompt with a custom string. This
is useful in cases where all the prompt information is not always needed. To enable
this, run `enable_transience` in the shell session. To make it permanent, put
this statement in your `~/.config/fish/config.fish`. Transience can be disabled on-the-fly with
`disable_transience`.
Note that in case of Fish, the transient prompt is only printed if the commandline is non-empty,
and syntactically correct.
- By default, the left side of input gets replaced with a bold-green `❯`. To customize this,
define a new function called `starship_transient_prompt_func`. For example, to
display Starship's `character` module here, you would do
```fish
function starship_transient_prompt_func
starship module character
end
starship init fish | source
enable_transience
```
- By default, the right side of input is empty. To customize this, define a new
function called `starship_transient_rprompt_func`. For example, to display
the time at which the last command was started here, you would do
```fish
function starship_transient_rprompt_func
starship module time
end
starship init fish | source
enable_transience
```
## Custom pre-prompt and pre-execution Commands in Cmd
Clink provides extremely flexible APIs to run pre-prompt and pre-exec commands

46
src/init/starship.fish
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@ -10,7 +10,18 @@ function fish_prompt
# Account for changes in variable name between v2.7 and v3.0
set STARSHIP_DURATION "$CMD_DURATION$cmd_duration"
set STARSHIP_JOBS (count (jobs -p))
::STARSHIP:: prompt --terminal-width="$COLUMNS" --status=$STARSHIP_CMD_STATUS --pipestatus="$STARSHIP_CMD_PIPESTATUS" --keymap=$STARSHIP_KEYMAP --cmd-duration=$STARSHIP_DURATION --jobs=$STARSHIP_JOBS
if test "$TRANSIENT" = "1"
# Clear from cursor to end of screen as `commandline -f repaint` does not do this
# See https://github.com/fish-shell/fish-shell/issues/8418
printf \e\[0J
if type -q starship_transient_prompt_func
starship_transient_prompt_func
else
printf "\e[1;32m❯\e[0m "
end
else
::STARSHIP:: prompt --terminal-width="$COLUMNS" --status=$STARSHIP_CMD_STATUS --pipestatus="$STARSHIP_CMD_PIPESTATUS" --keymap=$STARSHIP_KEYMAP --cmd-duration=$STARSHIP_DURATION --jobs=$STARSHIP_JOBS
end
end
function fish_right_prompt
@ -25,7 +36,15 @@ function fish_right_prompt
# Account for changes in variable name between v2.7 and v3.0
set STARSHIP_DURATION "$CMD_DURATION$cmd_duration"
set STARSHIP_JOBS (count (jobs -p))
::STARSHIP:: prompt --right --terminal-width="$COLUMNS" --status=$STARSHIP_CMD_STATUS --pipestatus="$STARSHIP_CMD_PIPESTATUS" --keymap=$STARSHIP_KEYMAP --cmd-duration=$STARSHIP_DURATION --jobs=$STARSHIP_JOBS
if test "$TRANSIENT" = "1"
if type -q starship_transient_rprompt_func
starship_transient_rprompt_func
else
printf ""
end
else
::STARSHIP:: prompt --right --terminal-width="$COLUMNS" --status=$STARSHIP_CMD_STATUS --pipestatus="$STARSHIP_CMD_PIPESTATUS" --keymap=$STARSHIP_KEYMAP --cmd-duration=$STARSHIP_DURATION --jobs=$STARSHIP_JOBS
end
end
# Disable virtualenv prompt, it breaks starship
@ -36,6 +55,29 @@ builtin functions -e fish_mode_prompt
set -gx STARSHIP_SHELL "fish"
# Transience related functions
function reset-transient --on-event fish_postexec
set -g TRANSIENT 0
end
function transient_execute
if commandline --is-valid
set -g TRANSIENT 1
commandline -f repaint
else
set -g TRANSIENT 0
end
commandline -f execute
end
function enable_transience
bind \r transient_execute
end
function disable_transience
bind \r execute
end
# Set up the session key that will be used to store logs
# We don't use `random [min] [max]` because it is unavailable in older versions of fish shell
set -gx STARSHIP_SESSION_KEY (string sub -s1 -l16 (random)(random)(random)(random)(random)0000000000000000)