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#
# bash completion support for easy Git.
#
# Copyright (C) 2006,2007 Shawn O. Pearce <spearce@spearce.org>
# Copyright (C) 2008-2010 Elijah Newren <newren@gmail.com>
# *Heavily* based on git-completion.sh
# Distributed under the GNU General Public License, version 2.0.
#
# *** IMPORTANT USAGE NOTE ***
# If you are using an old copy of git-completion.sh and you try to complete
# eg commands that the old version of git-completion.sh did not support, you
# may get errors like:
# bash: _git_fetch: command not found
#
# Reasons/rationale:
# This could be fixed by pulling all of git-completion.sh into this file,
# but this would be a heavy maintainence burden. Also, I like common
# bugs being fixed in one place... This only affects a few subcommands,
# so I don't think the trade-off is harsh. Besides, you can always
# download a recent copy of git and just install the git-completion.sh
# file all by itself to fix any such issues.
# *** END USAGE NOTE ***
#
# The contained completion routines provide support for completing:
#
# *) local and remote branch names
# *) local and remote tag names
# *) .git/remotes file names
# *) git 'subcommands'
# *) tree paths within 'ref:path/to/file' expressions
# *) common --long-options
#
# To use these routines (s/git-completion.sh/bash-completion-eg.sh/ in
# instructions below, but make sure git-completion.sh from the
# contrib/completion/ directory of git sources is also in use):
#
# 1) Copy this file to somewhere (e.g. ~/.git-completion.sh).
# 2) Added the following line to your .bashrc:
# source ~/.git-completion.sh
#
# 3) You may want to make sure the git executable is available
# in your PATH before this script is sourced, as some caching
# is performed while the script loads. If git isn't found
# at source time then all lookups will be done on demand,
# which may be slightly slower.
#
# 4) Consider changing your PS1 to also show the current branch:
# PS1='[\u@\h \W$(__git_ps1 " (%s)")]\$ '
#
# The argument to __git_ps1 will be displayed only if you
# are currently in a git repository. The %s token will be
# the name of the current branch.
#
# *** Maintainence Note ***
# Since this is so heavily based on git-completion.sh, it can be useful
# to run
# diff -u --ignore-space-change bash-completion-eg.sh git-completion.bash
# against a new version of git-completion.bash (under contrib/completion/
# in a copy of the git sources) in order to pick up any new completion
# commands that should be added to this file. The main thing to check in
# such a diff are the differences between the _eg() and _git() functions,
# particularly completion support that exists for subcommands in the latter
# but has no corresponding support in the former.
# *** End Note ***

__eg_commands ()
{
  if [ -n "$__eg_commandlist" ]; then
echo "$__eg_commandlist"
    return
fi
local i IFS=" "$'\n'
  eg help --all | egrep "^ eg" | awk '{print $2}' | sort | uniq
}
__eg_commandlist=
__eg_commandlist="$(__eg_commands 2>/dev/null)"

__eg_topics ()
{
  if [ -n "$__eg_topiclist" ]; then
echo "$__eg_topiclist"
    return
fi
local i IFS=" "$'\n'
  eg help topic | egrep "^[A-Za-z]" | awk '{print $1}' | grep -v "^Topics"
}
__eg_topiclist=
__eg_topiclist="$(__eg_topics 2>/dev/null)"

_eg_commit ()
{
__git_has_doubledash && return

local cur="${COMP_WORDS[COMP_CWORD]}"
case "$cur" in
--cleanup=*)
__gitcomp "default strip verbatim whitespace
" "" "${cur##--cleanup=}"
return
;;
--reuse-message=*)
__gitcomp "$(__git_refs)" "" "${cur##--reuse-message=}"
return
;;
--reedit-message=*)
__gitcomp "$(__git_refs)" "" "${cur##--reedit-message=}"
return
;;
--untracked-files=*)
__gitcomp "all no normal" "" "${cur##--untracked-files=}"
return
;;
--*)
__gitcomp "
--all-tracked --bypass-untracked-check --staged --dirty
--author= --signoff --verify --no-verify
--edit --amend --include --only
"
return
esac
COMPREPLY=()
}

_eg_diff ()
{
  local cur="${COMP_WORDS[COMP_CWORD]}"
  case "$cur" in
  --*)
    __gitcomp "--staged --unstaged
--cached --stat --numstat --shortstat --summary
--patch-with-stat --name-only --name-status --color
--no-color --color-words --no-renames --check
--full-index --binary --abbrev --diff-filter
--find-copies-harder --pickaxe-all --pickaxe-regex
--text --ignore-space-at-eol --ignore-space-change
--ignore-all-space --exit-code --quiet --ext-diff
--no-ext-diff"
    return
    ;;
  esac
__git_complete_file
}

_eg_help ()
{
  local i c=1 command
while [ $c -lt $COMP_CWORD ]; do
i="${COMP_WORDS[c]}"
    case "$i" in
    topic) command="$i"; break ;;
    esac
c=$((++c))
  done

if [ $c -eq $COMP_CWORD -a -z "$command" ]; then
local cur="${COMP_WORDS[COMP_CWORD]}"
    case "$cur" in
    --*)
      __gitcomp "--all"
      return
      ;;
    esac
__gitcomp "$(__eg_commands) topic"
  else
__gitcomp "$(__eg_topics)"
  fi
}

_eg_reset ()
{
__git_has_doubledash && return

local cur="${COMP_WORDS[COMP_CWORD]}"
case "$cur" in
--*)
__gitcomp "--working-copy --no-unstaging --merge --mixed --hard --soft --patch"
return
;;
esac
__gitcomp "$(__git_refs)"
}

_eg_revert ()
{
  local cur="${COMP_WORDS[COMP_CWORD]}"
  case "$cur" in
  --*)
    __gitcomp "--commit --no-commit --staged --in --since"
    return
    ;;
  esac
__git_complete_file
}

_eg_track ()
{
  local cur="${COMP_WORDS[COMP_CWORD]}"
  case "$cur" in
  --*)
    __gitcomp "--show --show-all --unset"
    return
    ;;
  esac
__git_complete_remote_or_refspec
}

_eg ()
{
  local i c=1 command __git_dir

  while [ $c -lt $COMP_CWORD ]; do
i="${COMP_WORDS[c]}"
    case "$i" in
    --git-dir=*) __git_dir="${i#--git-dir=}" ;;
    --bare) __git_dir="." ;;
    --version|-p|--paginate) ;;
    --help) command="help"; break ;;
    --translate|--debug) ;;
    *) command="$i"; break ;;
    esac
c=$((++c))
  done

if [ -z "$command" ]; then
case "${COMP_WORDS[COMP_CWORD]}" in
    --*) __gitcomp "
--debug
--translate
--paginate
--no-pager
--git-dir=
--bare
--version
--exec-path
--work-tree=
--help
"
      ;;
    *) __gitcomp "$(__eg_commands) $(__git_aliases)" ;;
    esac
return
fi

local expansion=$(__git_aliased_command "$command")
  [ "$expansion" ] && command="$expansion"

  case "$command" in
  am) _git_am ;;
  add) _git_add ;;
  apply) _git_apply ;;
  archive) _git_archive ;;
  bisect) _git_bisect ;;
  bundle) _git_bundle ;;
  branch) _git_branch ;;
  checkout) _git_checkout ;;
  cherry) _git_cherry ;;
  cherry-pick) _git_cherry_pick ;;
  clean) _git_clean ;;
  clone) _git_clone ;;
  commit) _eg_commit ;;
  config) _git_config ;;
  describe) _git_describe ;;
  diff) _eg_diff ;;
  fetch) _git_fetch ;;
  format-patch) _git_format_patch ;;
  gc) _git_gc ;;
  grep) _git_grep ;;
  help) _eg_help ;;
  init) _git_init ;;
  log) _git_log ;;
  ls-files) _git_ls_files ;;
  ls-remote) _git_ls_remote ;;
  ls-tree) _git_ls_tree ;;
  merge) _git_merge;;
  mergetool) _git_mergetool;;
  merge-base) _git_merge_base ;;
  mv) _git_mv ;;
  name-rev) _git_name_rev ;;
  pull) _git_pull ;;
  push) _git_push ;;
  rebase) _git_rebase ;;
  remote) _git_remote ;;
  reset) _eg_reset ;;
  revert) _eg_revert ;;
  rm) _git_rm ;;
  send-email) _git_send_email ;;
  shortlog) _git_shortlog ;;
  show) _git_show ;;
  show-branch) _git_log ;;
  stage) _git_add ;;
  stash) _git_stash ;;
  submodule) _git_submodule ;;
  svn) _git_svn ;;
  switch) _git_checkout ;;
  tag) _git_tag ;;
  track) _eg_track ;;
  # unstage) COMPREPLY=() ;; ## Already handled by default case
  whatchanged) _git_log ;;
  *) COMPREPLY=() ;;
  esac
}

complete -o bashdefault -o default -o nospace -F _eg eg 2> /dev/null \
|| complete -o default -o nospace -F _eg eg
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