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mcfly: fix to correctly no-op when mcfly is absent
author Augie Fackler <raf@durin42.com>
date Wed, 01 Jul 2020 13:36:33 -0400
parents 4b2472372fad
children 55aa151f3567
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/bin/zsh
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2
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3 # Ensure stdin is a tty
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4 [[ -t 0 ]] || return
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5
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6 # Make sure mcfly is installed
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7 if ! which mcfly > /dev/null ; then
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26caf7bf8805 mcfly: fix to correctly no-op when mcfly is absent
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8 return 0
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9 fi
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10
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11 # Avoid loading this file more than once
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12 if [[ "$__MCFLY_LOADED" == "loaded" ]]; then
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13 return 0
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14 fi
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15 __MCFLY_LOADED="loaded"
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16
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17 emulate -L zsh
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18
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19 # Ensure HISTFILE exists.
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20 export HISTFILE="${HISTFILE:-$HOME/.zsh_history}"
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21 if [[ ! -r "${HISTFILE}" ]]; then
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22 echo "McFly: ${HISTFILE} does not exist or is not readable. Please fix this or set HISTFILE to something else before using McFly."
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23 return 1
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24 fi
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25
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26 # MCFLY_SESSION_ID is used by McFly internally to keep track of the commands from a particular terminal session.
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27 export MCFLY_SESSION_ID=$(dd if=/dev/urandom bs=256 count=1 2> /dev/null | env LC_ALL=C tr -dc 'a-zA-Z0-9' | head -c 24)
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28
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29 # Find the binary
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30 MCFLY_PATH=${MCFLY_PATH:-$(which mcfly)}
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31
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32 # Required for commented out mcfly search commands to work.
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33 setopt interactive_comments # allow comments in interactive shells (like Bash does)
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34
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35 # McFly's temporary, per-session history file.
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36 if [[ ! -f "${MCFLY_HISTORY}" ]]; then
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37 export MCFLY_HISTORY=$(mktemp -t mcfly.XXXXXXXX)
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38 fi
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39
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40 # Setup a function to be used by $PROMPT_COMMAND.
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41 function mcfly_prompt_command {
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42 local exit_code=$? # Record exit status of previous command.
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43
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44 # Populate McFly's temporary, per-session history file from recent commands in the shell's primary HISTFILE.
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45 if [[ ! -f "${MCFLY_HISTORY}" ]]; then
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46 export MCFLY_HISTORY=$(mktemp -t mcfly.XXXXXXXX)
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47 tail -n100 "${HISTFILE}" >| ${MCFLY_HISTORY}
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48 fi
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49
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50 # Write history to $MCFLY_HISTORY.
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51 fc -W "${MCFLY_HISTORY}"
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52
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53 # Run mcfly with the saved code. It fill find the text of the last command in $MCFLY_HISTORY and save it to the database.
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54 [ -n "$MCFLY_DEBUG" ] && echo "mcfly.zsh: Run mcfly add --exit ${exit_code}"
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55 $MCFLY_PATH add --exit ${exit_code}
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56 return ${exit_code} # Restore the original exit code by returning it.
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57 }
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58 precmd_functions+=(mcfly_prompt_command)
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59
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60 # Cleanup $MCFLY_HISTORY tmp files on exit.
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61 exit_logger() {
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62 [ -n "$MCFLY_DEBUG" ] && echo "mcfly.zsh: Exiting and removing $MCFLY_HISTORY"
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63 rm -f $MCFLY_HISTORY
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64 }
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65 zshexit_functions+=(exit_logger)
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66
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67 # If this is an interactive shell, take ownership of ctrl-r.
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68 if [[ $- =~ .*i.* ]]; then
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69 mcfly-history-widget() {
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70 () {
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71 echoti rmkx
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72 exec </dev/tty
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73 local mcfly_output=$(mktemp -t mcfly.output.XXXXXXXX)
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74 $MCFLY_PATH search -o "${mcfly_output}" "${LBUFFER}"
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75 local mode=$(sed -n 1p $mcfly_output)
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76 local selected=$(sed 1d $mcfly_output)
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77 rm -f $mcfly_output
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78 echoti smkx
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79 if [[ -n $selected ]]; then
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80 RBUFFER=""
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81 LBUFFER="${selected}"
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82 fi
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83 if [[ "${mode}" == "run" ]]; then
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84 zle accept-line
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85 fi
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86 zle redisplay
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87 }
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88 }
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89 zle -N mcfly-history-widget
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90 bindkey '^T' mcfly-history-widget
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91 fi