Include bash-completion for Timewarrior

- Closes #96

Signed-off-by: Thomas Lauf <thomas.lauf@tngtech.com>

completion/README.md

@@ -0,0 +1,9 @@
+# Shell completion
+
+The script here is taken from a separate project.
+Issues and pull-requests should go there.
+The updated version will then be included here.
+
+If you are missing a completion, feel free to contribute.
+
+* `timew-completion.bash` is taken from https://github.com/lauft/timew-bashcompletion which is released under [MIT license](https://github.com/lauft/timew-bashcompletion/blob/master/LICENSE)

completion/timew-completion.bash

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+#!/usr/bin/env bash
+#
+# Bash completion for TimeWarrior
+#
+# Copyright (C) 2017 - 2019  Thomas Lauf
+#
+function __get_commands()
+{
+  echo "annotate cancel config continue day delete diagnostics export extensions gaps get help join lengthen modify month move report shorten show split start stop summary tag tags track undo untag week"
+}
+
+function __get_subcommands()
+{
+  case "${1}" in
+    modify)
+      echo "end start"
+      ;;
+    *)
+      echo ""
+      ;;
+  esac
+}
+
+function __get_help_items()
+{
+  echo "$( __get_commands ) interval hints date duration dom"
+}
+
+function __get_options()
+{
+  echo "--help --verbose --version"
+}
+
+function __get_ids()
+{
+  seq -f "@%g" 1 "$( timew get dom.tracked.count )"
+}
+
+function __get_tags()
+{
+  timew tags | awk '{if(NR>3)print $1}'
+}
+
+function __get_extensions()
+{
+  timew extensions | awk '{if(NR>6)print $1}'
+}
+
+function __has_entered_id()
+{
+  for word in "${COMP_WORDS[@]}" ; do
+    if [[ "${word}" =~ ^@ ]] ; then
+      return 0
+    fi
+  done
+
+  return 1
+}
+
+function __has_entered_subcommand()
+{
+  local subcommands=$( __get_subcommands "${1}" )
+
+  for word in "${COMP_WORDS[@]}" ; do
+    for cmd in ${subcommands} ; do
+      if [[ "${word}" == "${cmd}" ]] ; then
+        return 0
+      fi
+    done
+  done
+
+  return 1
+}
+
+function __has_entered_help_item()
+{
+  local items=$( __get_help_items )
+
+  for word in "${COMP_WORDS[@]:2}" ; do
+    for item in ${items} ; do
+      if [[ "${word}" == "${item}" ]] ; then
+        return 0
+      fi
+    done
+  done
+
+  return 1
+}
+
+function __is_entering_id()
+{
+  if [[ "${COMP_WORDS[COMP_CWORD]}" =~ @[0-9]* ]] ; then
+    return 0
+  else
+    return 1
+  fi
+}
+
+function _timew()
+{
+  local cur first
+  COMPREPLY=()
+  cur="${COMP_WORDS[COMP_CWORD]}"
+  first="${COMP_WORDS[1]}"
+
+  case "${first}" in
+    cancel|config|diagnostics|day|extensions|get|month|show|undo|week)
+      wordlist=""
+      ;;
+    annotate|continue|delete|join|lengthen|move|shorten|split)
+      wordlist=$( __get_ids )
+      ;;
+    export|gaps|start|stop|summary|tags|track)
+      wordlist=$( __get_tags )
+      ;;
+    modify)
+      if __has_entered_subcommand "${first}" ; then
+        wordlist=$( __get_ids )
+      else
+        wordlist=$( __get_subcommands "${first}" )
+      fi
+      ;;
+    tag|untag)
+      if __is_entering_id ; then
+        wordlist=$( __get_ids )
+      elif __has_entered_id ; then
+        wordlist=$( __get_tags )
+      else
+        wordlist=$( __get_ids )
+      fi
+      ;;
+    report)
+      wordlist=$( __get_extensions )
+      ;;
+    help)
+      if __has_entered_help_item ; then
+        wordlist=""
+      else
+        wordlist=$( __get_help_items )
+      fi
+      ;;
+    --*)
+      wordlist=$( __get_options )
+      ;;
+    *)
+      wordlist=$( __get_commands )
+      ;;
+  esac
+
+  COMPREPLY=($( compgen -W "${wordlist}" -- "${cur}" ))
+}
+
+complete -F _timew timew