Running ble.sh With Oil

Related: How Interactive Shells Work

This is issue #653, in particular the list of tasks in this comment.

Bugs Found by Running Ble.sh

• #653 29. BUG: Cannot parse ${arr[@]::}
• #653 30. BUG: ${arr[@]::0} prints all the elements
• #653 33. BUG: Redirection of 2 is persistent after : 2>/dev/null >&30
• #653 37. BUG: {fd}>&- does not close the fd

Features Needed to Run Ble.sh

• bind -x to get user input. Can we do something simpler/better at first?
• read -t 0 (Or select/poll-like feature)
  • what C function do we want to wrap? select() on the terminal?
• #146 NYI: mapfile / readarray ★ (tests #666)
• #647 NYI: declare -p, etc.
  • declare, declare -p (#671)
  • declare -f, type function ★
  • trap, trap -p
• #653 16. NYI: read -t timeout / builtin sleep #684
• #680 trap -l
• #653 19. NYI: let (#622)
• #653 26. NYI: Dynamic unset ★
• #653 28. NYI: declare -iluc and flags iluc in ${var@a}
• #653 31. COMPAT: shopt for $ARRAY? ★
• #653 32. NYI: LC_CTYPE (or Binary manipulations) (#527 and #529)
• #653 34. NYI: $BASHPID (Or Current subshell PID)

Others

• #652 CONSISTENCY: Check declare -A d=([k]=v)
• #654 DOC: redefinable builtins?
• #653 22. COMPAT: builtin declare doesn't work (#654)
• #653 24. COMPAT/ERRMSG: Oil tries to execute the first path in PATH for an empty command (#690)
• #653 35. COMPAT: Oil session closed by exec non-existent-command

Done

• #620 NYI: return 2>/dev/null
• #637 CONSISTENCY: type return
• #537 NYI: test -k (#649)
• #640 NYI: ((${prefix}a=${prefix}b)) (cf #644 #670) ★★
• #651 NYI: unset -v 'a[0]' ★★
• #653 1. CONSISTENCY: default [[ -o emacs ]] in interactive sessions ★
  • #659 set +o emacs
• #653 2. NYI: $FUNCNAME / $BASH_LINENO (#656)
• #653 3. BUG: ${*:offset} (#658)
• #653 4. BUG: ${!prefix@} self-rewrites (#657)
• #653 5. CONSISTENCY: declare -A dict=() (#661) ★★
• #653 6. NYI: exec 5<> a.pipe (cf #223 #667 #672)
• #653 7. NYI: exec {fd}> a.txt (cf #223 #672)
• #653 8. NYI: exec 5>&- (cf #223 #667 #672)
• #653 9. NYI: read -d '' (#356 #665) ★
• #653 10. ERRMSG: builtin read
• #653 11. NYI: trap -- ... / eval -- ... (#662) ★★
• #653 12. NYI: printf '%()T' (cf #650 #668)
• #653 13. BUG: ${var=x}
• #653 14. DOC: Bash/Oil diff
  • #648 recursive arithmetic evaluation ☆ (tests #686)
  • #664 ERRMSG: error inside $((a))
• #653 15. NEWFEAT: OIL_VERSION / OIL_VERSINFO? #683
• #653 17. BUG: ${arr[0]=x} (#660) ★
• #653 18. BUG? An empty variable in recursive arithmetic evaluation produces fatal error (e379b61)
• #653 20. BUG ${!prefix@} fails when prefix matches with an array name (daab1d6)
• #653 21. BUG ${x/^} crashes (dbf9e00)
• #653 23. BUG: declare -F funcname doesn't accept non-alphanumeric characters in funcname ★★ (ec62c8a)
• #653 25. NYI: Attributes ${var@a} (#689)
• #653 27. NYI: flags rx in ${var@a} (14548dc)
• #653 36. BUG: read fails on empty lines (#705) ★★