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68 lines
1.5 KiB
68 lines
1.5 KiB
5 years ago
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#!/usr/bin/env bash
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# Originally borrowed from here: https://github.com/tomnomnom/with/blob/master/with
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# As such credit should go to tomnomnom
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# with tool
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# usage: with <program>
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# opens an interactive shell instance that automatically prefixes all subsequent commands with program name
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pmpt="$*>"
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prefix=$*
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which $1 2>&1 > /dev/null
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program_installed=$?
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if [ ! $program_installed -eq 0 ]; then
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echo "error: Program" $1 "is not installed"
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exit 1
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fi
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stop=false
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while [ true ]; do
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while IFS="" read -r -e -d $'\n' -p "$pmpt " options; do
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history -s "$options"
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curr_command="$(echo $options | { read first rest ; echo $first ; })"
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if [ -z "$curr_command" ]; then
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# null case
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eval "${prefix}"
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else
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# remove with
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if [ $curr_command == - ]; then
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prefix=$( echo $prefix | awk '{$NF="";sub(/[ \t]+$/,"")}1' )
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pmpt="$prefix>"
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# nesting withs
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elif [[ $curr_command == +* ]]; then
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parsed=${options#"+"}
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prefix=$( echo "$prefix" "$parsed" )
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pmpt="$prefix>"
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# process shell commands
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elif [[ $curr_command == :* ]]; then
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parsed=${options#":"}
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if [ "$parsed" = "q" ]; then
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# terminate out of while loop instead of exiting so we can do some safe exiting
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stop=true
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break
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fi
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eval "$parsed"
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else
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eval "$prefix $options"
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fi
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fi
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# see if there are any commands left
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if [ -z "$prefix" ]; then
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echo "No program. Returning to shell."
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# null case
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stop=true
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break
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fi
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done
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if [ stop=true ]; then
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break
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fi
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done
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