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feat(bash): Support right prompt and transience (#4902)

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* Support right prompt in bash

* Docs for transience in bash

* Apply suggestions from review

* Simplify conditional

* Use ble.sh hooks, if available

* Properly quote args

* Use BLE_PIPESTATUS

* Update starship.bash

* Update src/init/starship.bash

Co-authored-by: Koichi Murase <myoga.murase@gmail.com>

---------

Co-authored-by: Koichi Murase <myoga.murase@gmail.com>
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Rashil Gandhi 2024-01-21 18:25:52 +05:30 committed by GitHub
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39
docs/advanced-config/README.md
View File

@ -106,6 +106,41 @@ starship init fish | source
enable_transience
```
## TransientPrompt and TransientRightPrompt in Bash
The [Ble.sh](https://github.com/akinomyoga/ble.sh) framework allows you to replace
the previous-printed prompt with custom strings. This is useful in cases where all
the prompt information is not always needed. To enable this, put this in `~/.bashrc`
`bleopt prompt_ps1_transient=<value>`:
The \<value\> here is a colon-separated list of `always`, `same-dir` and `trim`.
When `prompt_ps1_final` is empty and this option has a non-empty value,
the prompt specified by `PS1` is erased on leaving the current command line.
If the value contains a field `trim`, only the last line of multiline `PS1` is
preserved and the other lines are erased. Otherwise, the command line will be
redrawn as if `PS1=` is specified. When a field `same-dir` is contained in the
value and the current working directory is different from the final directory of
the previous command line, this option `prompt_ps1_transient` is ignored.
Make the following changes to your `~/.bashrc` to customize what gets displayed on
the left and on the right:
- To customize what the left side of input gets replaced with, configure the
`prompt_ps1_final` Ble.sh option. For example, to display Starship's `character`
module here, you would do
```bash
bleopt prompt_ps1_final="$(starship module character)"
```
- To customize what the right side of input gets replaced with, configure the
`prompt_rps1_final` Ble.sh option. For example, to display
the time at which the last command was started here, you would do
```bash
bleopt prompt_rps1_final="$(starship module time)"
```
## Custom pre-prompt and pre-execution Commands in Cmd
Clink provides extremely flexible APIs to run pre-prompt and pre-exec commands
@ -261,7 +296,9 @@ not explicitly used in either `format` or `right_format`.
Note: The right prompt is a single line following the input location. To right align modules above
the input line in a multi-line prompt, see the [`fill` module](/config/#fill).
`right_format` is currently supported for the following shells: elvish, fish, zsh, xonsh, cmd, nushell.
`right_format` is currently supported for the following shells: elvish, fish, zsh, xonsh, cmd, nushell, bash.
Note: The [Ble.sh](https://github.com/akinomyoga/ble.sh) framework should be installed in order to use right prompt in bash.
### Example

20
src/init/starship.bash
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@ -33,6 +33,9 @@ starship_preexec() {
starship_precmd() {
# Save the status, because commands in this pipeline will change $?
STARSHIP_CMD_STATUS=$? STARSHIP_PIPE_STATUS=(${PIPESTATUS[@]})
if [[ ${BLE_ATTACHED-} && ${#BLE_PIPESTATUS[@]} -gt 0 ]]; then
STARSHIP_PIPE_STATUS=("${BLE_PIPESTATUS[@]}")
fi
if [[ "${#BP_PIPESTATUS[@]}" -gt "${#STARSHIP_PIPE_STATUS[@]}" ]]; then
STARSHIP_PIPE_STATUS=(${BP_PIPESTATUS[@]})
fi
@ -64,21 +67,30 @@ starship_precmd() {
eval "$_PRESERVED_PROMPT_COMMAND"
local -a ARGS=(--terminal-width="${COLUMNS}" --status="${STARSHIP_CMD_STATUS}" --pipestatus="${STARSHIP_PIPE_STATUS[*]}" --jobs="${NUM_JOBS}")
# Prepare the timer data, if needed.
if [[ $STARSHIP_START_TIME ]]; then
STARSHIP_END_TIME=$(::STARSHIP:: time)
STARSHIP_DURATION=$((STARSHIP_END_TIME - STARSHIP_START_TIME))
PS1="$(::STARSHIP:: prompt --terminal-width="$COLUMNS" --status=$STARSHIP_CMD_STATUS --pipestatus="${STARSHIP_PIPE_STATUS[*]}" --jobs="$NUM_JOBS" --cmd-duration=$STARSHIP_DURATION)"
ARGS+=( --cmd-duration="${STARSHIP_DURATION}")
unset STARSHIP_START_TIME
else
PS1="$(::STARSHIP:: prompt --terminal-width="$COLUMNS" --status=$STARSHIP_CMD_STATUS --pipestatus="${STARSHIP_PIPE_STATUS[*]}" --jobs="$NUM_JOBS")"
fi
PS1="$(::STARSHIP:: prompt "${ARGS[@]}")"
if [[ ${BLE_ATTACHED-} ]]; then
local nlns=${PS1//[!$'\n']}
bleopt prompt_rps1="$nlns$(::STARSHIP:: prompt --right "${ARGS[@]}")"
fi
STARSHIP_PREEXEC_READY=true # Signal that we can safely restart the timer
}
# If the user appears to be using https://github.com/akinomyoga/ble.sh,
# then hook our functions into their framework.
if [[ ${BLE_VERSION-} && _ble_version -ge 400 ]]; then
blehook PREEXEC!='starship_preexec "$_"'
blehook PRECMD!='starship_precmd'
# If the user appears to be using https://github.com/rcaloras/bash-preexec,
# then hook our functions into their framework.
if [[ "${__bp_imported:-}" == "defined" || $preexec_functions || $precmd_functions ]]; then
elif [[ "${__bp_imported:-}" == "defined" || $preexec_functions || $precmd_functions ]]; then
# bash-preexec needs a single function--wrap the args into a closure and pass
starship_preexec_all(){ starship_preexec "$_"; }
preexec_functions+=(starship_preexec_all)