mirror of
https://github.com/Llewellynvdm/starship.git
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525dfef9a7
* fix: character module last command status for bash * fix: command duration module for bash
87 lines
3.7 KiB
Bash
87 lines
3.7 KiB
Bash
# We use PROMPT_COMMAND and the DEBUG trap to generate timing information. We try
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# to avoid clobbering what we can, and try to give the user ways around our
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# clobbers, if it's unavoidable. For example, PROMPT_COMMAND is appended to,
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# and the DEBUG trap is layered with other traps, if it exists.
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# A bash quirk is that the DEBUG trap is fired every time a command runs, even
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# if it's later on in the pipeline. If uncorrected, this could cause bad timing
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# data for commands like `slow | slow | fast`, since the timer starts at the start
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# of the "fast" command.
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# To solve this, we set a flag `PREEXEC_READY` when the prompt is drawn, and only
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# start the timer if this flag is present. That way, timing is for the entire command,
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# and not just a portion of it.
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# Will be run before *every* command (even ones in pipes!)
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starship_preexec() {
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# Save previous command's last argument, otherwise it will be set to "starship_preexec"
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local PREV_LAST_ARG=$1
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# Avoid restarting the timer for commands in the same pipeline
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if [ "$PREEXEC_READY" = "true" ]; then
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PREEXEC_READY=false
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STARSHIP_START_TIME=$(::STARSHIP:: time)
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fi
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: "$PREV_LAST_ARG"
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}
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# Will be run before the prompt is drawn
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starship_precmd() {
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# Save the status, because commands in this pipeline will change $?
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STATUS=$?
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# Run the bash precmd function, if it's set. If not set, evaluates to no-op
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"${starship_precmd_user_func-:}"
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eval "$_PRESERVED_PROMPT_COMMAND"
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# Prepare the timer data, if needed.
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if [[ $STARSHIP_START_TIME ]]; then
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STARSHIP_END_TIME=$(::STARSHIP:: time)
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STARSHIP_DURATION=$((STARSHIP_END_TIME - STARSHIP_START_TIME))
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PS1="$(::STARSHIP:: prompt --status=$STATUS --jobs="$(jobs -p | wc -l)" --cmd-duration=$STARSHIP_DURATION)"
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unset STARSHIP_START_TIME
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else
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PS1="$(::STARSHIP:: prompt --status=$STATUS --jobs="$(jobs -p | wc -l)")"
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fi
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PREEXEC_READY=true # Signal that we can safely restart the timer
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}
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# If the user appears to be using https://github.com/rcaloras/bash-preexec,
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# then hook our functions into their framework.
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if [[ $preexec_functions ]]; then
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preexec_functions+=('starship_preexec "$_"')
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precmd_functions+=(starship_precmd)
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else
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# We want to avoid destroying an existing DEBUG hook. If we detect one, create
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# a new function that runs both the existing function AND our function, then
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# re-trap DEBUG to use this new function. This prevents a trap clobber.
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dbg_trap="$(trap -p DEBUG | cut -d' ' -f3 | tr -d \')"
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if [[ -z "$dbg_trap" ]]; then
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trap 'starship_preexec "$_"' DEBUG
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elif [[ "$dbg_trap" != 'starship_preexec "$_"' && "$dbg_trap" != 'starship_preexec_all "$_"' ]]; then
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starship_preexec_all() {
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local PREV_LAST_ARG=$1 ; $dbg_trap; starship_preexec; : "$PREV_LAST_ARG";
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}
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trap 'starship_preexec_all "$_"' DEBUG
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fi
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# Finally, prepare the precmd function and set up the start time. We will avoid to
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# add multiple instances of the starship function and keep other user functions if any.
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if [[ -z "$PROMPT_COMMAND" ]]; then
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PROMPT_COMMAND="starship_precmd"
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elif [[ "$PROMPT_COMMAND" != *"starship_precmd" ]]; then
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# Appending to PROMPT_COMMAND breaks exit status ($?) checking.
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# Prepending to PROMPT_COMMAND breaks "command duration" module.
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# So, we are preserving the existing PROMPT_COMMAND
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# which will be executed later in the starship_precmd function
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_PRESERVED_PROMPT_COMMAND="$PROMPT_COMMAND"
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PROMPT_COMMAND="starship_precmd"
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fi
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fi
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# Set up the start time and STARSHIP_SHELL, which controls shell-specific sequences
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STARSHIP_START_TIME=$(::STARSHIP:: time)
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export STARSHIP_SHELL="bash"
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