hack bash into something that addresses the concerns of Don Norman and Jef Raskin to make your bash smarter than you are.

1. Towards a Smarter Bash

2. HCI

3. Human

4. Computer

6. Barbara Blackburn

7. 200 wpm = 200 * 5 * 8 / 60 = 133 bits/s

8. Towards a Smarter Bash

9. Howard Stephen Berg

10. 25,000 wpm

11. he's a freak

12. 2000 wpm = 1.3 kbits/s

13. Towards a Smarter Bash

14. V22.bis = Blazing Fast

15. For 1988

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17. Other Criticisms?

18. Towards a Smarter Bash

20. The Truth about UNIX: the user interface is horrid (1981)

21. Inconsistent Syntax & Usage Names do not map to Functionality Feedback only occurs on Error High Cognitive Load

22. He was absolutely correct

23. For 1981.

24. Bash 4.0

25. file.new file.delete file.properties directory.new directory.delete directory.properties ...

26. alias file.new=”touch” alias file.delete=”rm” alias file.properties=”stat” alias directory.new=”mkdir” alias directory.delete=”rmdir” alias directory.properties=”stat” ...

27. Mnemonics = Bash Completion

28. Alert Only On Error He was wrong ;)

29. Written by Monkeys on Crack? Snopes says True.

32. A computer shall not harm your work or, through inactivity, allow your work to come to harm.

33. function rm() { mv $* ${TMP_DIR}/. } set -C

34. A computer shall not waste your time or require you to do more work than is strictly necessary

35. Shannon's Law bits/s = frequency * log (1+S/N) N = our typing error rate

36. shopt -s dirspell shopt -s cdspell set completion-ignore-case on

37. To get any lazier, we need to do some real work

38. Huffman Coding Vary storage size inversely with frequency

39. sort .bash_history | awk '{ print $1 }' | uniq -c | sort -rn | less Create tiny aliases for the most common

40. me$ cd /var/tmp me$ ls

41. cd() { builtin cd "$@" # list first bunch of entries directory.contents.wide | head }

42. me$ chmod 0 lamers_file me$ ls -l lamers_file

43. [[ ${PS1} = “” ]] && return file_change() { IFS= $@ shift for f in "$*" ; do if file.is_file "${f}"; then file.properties "${f}" fi done }

44. mv() { file_change command mv "$@"; } chmod() { file_change command chmod "$@"; } chown() { file_change command chown "$@"; } touch() { file_change command touch "$@"; }

45. Smart Prompts know that attention is precious

46. Seeing is believing?

47. sane_prompt() { export PROMPT_LAST_CMD_EXIT_CODE=$? history -a prompt_screen_shelltitle local pkts=$( prompt_pad ${TEXT_RED} prompt_network_loss ) # wifi, directory size # SVN/CVS/GIT repo status # disk usage, cpu usage, … PS1="${hms}${box}${disk}${cpu}${wifi}${pkts}${dirsize}${repo}${err}${wd}" [[ ${#PS1} -gt ${PROMPT_MAX_LENGTH} ]] && PS1="${PS1}" export PS1="${PS1}${sigil}${TEXT_BLACK} " export PROMPT_PREVIOUS_TIME=${SECONDS} } export PROMPT_COMMAND=sane_prompt

48. What about the Third Law?

49. sane_prompt() { ... # disabled by operator? [[ -e ${PROMPT_KILL_FILE} ]] && return # box too busy, be nice local load=$( cpu_usage_as_int ) [[ ${load} -gt ${PROMPT_LOAD_MAX} ]] && { echo CPU LOAD ABOVE ${PROMPT_LOAD_MAX} return } ... }

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51. Towards a Smarter Bash

54. echo 0.102.83.12.74.96 | sed 's// /g' | each word printf '”%02x:”' {}

55. Any Ruby Fans Here?

56. each() { ... if [[ "$1" = "word" ]]; then shift while read line; do for word in ${line}; do eval "${@//amp;quot;${word}amp;quot;}" done done fi }

57. Completion = Speed

58. export TWITS=”${HOME}/.twits” twit() { url="https://twitter.com/statuses/update.xml" __add() { grep -q ^$1 ${TWITS} || echo $1 >> ${TWITS} } for word in $*; do [[ '@' = "${word/[^@]*/}" ]] && __add ${word} done output=$(curl -v -n -d status="$*" ${url} 2>&1) [[ $? != 0 ]] && echo ${output} } complete_twit() { local cur=${COMP_WORDS[COMP_CWORD]} COMPREPLY=( $( grep -i ${cur} ${TWITS} ) ) } complete -F complete_twit twit

59. Future Work

60. # bash 4.0 error trapping command_not_found_handle() { local cmd="$*" read -p "errors> " -e -i "${cmd}" cmd ${cmd} }

61. Towards a Smarter Bash

62. Towards a Smarter Human

64. Thanks! http://haller.ws/projects/bash