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Update title automatically in shell integration

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* integration/bash (__eat_prompt_command): Remove extra '\'s.
* integration/bash (__eat_in_prompt_command): New variable.
* integration/bash (__eat_preexec, __eat_before_prompt_command)
(__eat_after_prompt_command, __eat_before_exec): New function.
* integration/bash: Modify PS1 to update terminal title when
displaying prompt.  Add '__eat_before_exec' as 'DEBUG' trap
handler to update terminal title just before executing a
command.  Prepend and append '__eat_before_prompt_command' and
'__eat_after_prompt_command' to 'PROMPT_COMMAND' to avoid
getting trapped in 'DEBUG' trap.
This commit is contained in:
Akib Azmain Turja 2022-12-04 15:10:13 +06:00
parent 226ff56932
commit 0887bd6a7d
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GPG key ID: 5535FCF54D88616B
1 changed files with 47 additions and 1 deletions
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integration/bash
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@ -19,14 +19,60 @@
__eat_prompt_command () {
# Send the current working directory, for directory tracking.
printf "\\e]7;file://%s%s\\e\\\\" "$HOSTNAME" "$PWD"
printf '\e]7;file://%s%s\e\\' "$HOSTNAME" "$PWD"
}
__eat_preexec () {
# "${PWD/$HOME/'~'}" converts "/home/akib/org/" to "~/org/".
# The next one is substituted with '$', or '#' if we're "root".
printf '\e]2;%s@%s:%s%s %s\e\\' "$USER" "$HOSTNAME" \
"${PWD/$HOME/'~'}" \
"$(test $UID -eq 0 && echo '#' || echo '$')" "$BASH_COMMAND"
}
__eat_in_prompt_command=no
__eat_before_prompt_command ()
{
__eat_in_prompt_command=yes
}
__eat_after_prompt_command ()
{
__eat_in_prompt_command=no
}
__eat_before_exec () {
if test $__eat_in_prompt_command = no \
&& test "$BASH_COMMAND" != __eat_before_prompt_command
then
__eat_preexec
fi
}
# Add '__eat_prompt_command' as the last element of 'PROMPT_COMMAND'.
if test -z "$__eat_bash_integration_enabled"
then
__eat_bash_integration_enabled=yes
PS1='\[\e]2;\u@\h:\w$\e\\\]'"$PS1"
PROMPT_COMMAND+=(__eat_prompt_command)
trap '__eat_before_exec' DEBUG
# Wrap 'PROMPT_COMMAND' to avoid it getting trapped in 'DEBUG' trap.
# Step 1: Append to PROMPT_COMMAND.
PROMPT_COMMAND+=(__eat_after_prompt_command)
# Step 2: Prepend to PROMPT_COMMAND.
# Step 2.1: Move all elements to make the first index free.
# Fun fact: Microsoft doesn't still know this simple trick. They
# use something as silly and pityful as 'VAR=$PROMPT_COMMAND' to
# copy a Bash array in VSCode Bash integration script, that simply
# won't work ever, and then complain about Bash in the comments!
# LOL. ;D
for i in $(eval "printf {${#PROMPT_COMMAND[*]}..1..-1}")
do
PROMPT_COMMAND[$i]=${PROMPT_COMMAND[$((i-1))]}
done
# Step 2.2: Assign the first element.
PROMPT_COMMAND[0]=__eat_before_prompt_command
fi
# Local Variables: