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git-completion.tcsh

# tcsh completion support for core Git.
#
# Copyright (C) 2012 Marc Khouzam <marc.khouzam@gmail.com>
# Distributed under the GNU General Public License, version 2.0.
#
# When sourced, this script will generate a new script that uses
# the git-completion.bash script provided by core Git.  This new
# script can be used by tcsh to perform git completion.
# The current script also issues the necessary tcsh 'complete'
# commands.
#
# To use this completion script:
#
#    0) You need tcsh 6.16.00 or newer.
#    1) Copy both this file and the bash completion script to ${HOME}.
#       You _must_ use the name ${HOME}/.git-completion.bash for the
#       bash script.
#       (e.g. ~/.git-completion.tcsh and ~/.git-completion.bash).
#    2) Add the following line to your .tcshrc/.cshrc:
#        source ~/.git-completion.tcsh
#    3) For completion similar to bash, it is recommended to also
#       add the following line to your .tcshrc/.cshrc:
#        set autolist=ambiguous
#       It will tell tcsh to list the possible completion choices.

set __git_tcsh_completion_version = `\echo ${tcsh} | \sed 's/\./ /g'`
if ( ${__git_tcsh_completion_version[1]} < 6 || \
     ( ${__git_tcsh_completion_version[1]} == 6 && \
       ${__git_tcsh_completion_version[2]} < 16 ) ) then
	echo "git-completion.tcsh: Your version of tcsh is too old, you need version 6.16.00 or newer.  Git completion will not work."
	exit
endif
unset __git_tcsh_completion_version

set __git_tcsh_completion_original_script = ${HOME}/.git-completion.bash
set __git_tcsh_completion_script = ${HOME}/.git-completion.tcsh.bash

# Check that the user put the script in the right place
if ( ! -e ${__git_tcsh_completion_original_script} ) then
	echo "git-completion.tcsh: Cannot find: ${__git_tcsh_completion_original_script}.  Git completion will not work."
	exit
endif

cat << EOF >! ${__git_tcsh_completion_script}
#!bash
#
# This script is GENERATED and will be overwritten automatically.
# Do not modify it directly.  Instead, modify git-completion.tcsh
# and source it again.

source ${__git_tcsh_completion_original_script}

# Remove the colon as a completion separator because tcsh cannot handle it
COMP_WORDBREAKS=\${COMP_WORDBREAKS//:}

# For file completion, tcsh needs the '/' to be appended to directories.
# By default, the bash script does not do that.
# We can achieve this by using the below compatibility
# method of the git-completion.bash script.
__git_index_file_list_filter ()
{
	__git_index_file_list_filter_compat
}

# Set COMP_WORDS in a way that can be handled by the bash script.
COMP_WORDS=(\$2)

# The cursor is at the end of parameter #1.
# We must check for a space as the last character which will
# tell us that the previous word is complete and the cursor
# is on the next word.
if [ "\${2: -1}" == " " ]; then
	# The last character is a space, so our location is at the end
	# of the command-line array
	COMP_CWORD=\${#COMP_WORDS[@]}
else
	# The last character is not a space, so our location is on the
	# last word of the command-line array, so we must decrement the
	# count by 1
	COMP_CWORD=\$((\${#COMP_WORDS[@]}-1))
fi

# Call __git_wrap__git_main() or __git_wrap__gitk_main() of the bash script,
# based on the first argument
__git_wrap__\${1}_main

IFS=\$'\n'
if [ \${#COMPREPLY[*]} -eq 0 ]; then
	# No completions suggested.  In this case, we want tcsh to perform
	# standard file completion.  However, there does not seem to be way
	# to tell tcsh to do that.  To help the user, we try to simulate
	# file completion directly in this script.
	#
	# Known issues:
	#     - Possible completions are shown with their directory prefix.
	#     - Completions containing shell variables are not handled.
	#     - Completions with ~ as the first character are not handled.

# No file completion should be done unless we are completing beyond
	# the git sub-command.  An improvement on the bash completion :)
	if [ \${COMP_CWORD} -gt 1 ]; then
		TO_COMPLETE="\${COMP_WORDS[\${COMP_CWORD}]}"

# We don't support ~ expansion: too tricky.
		if [ "\${TO_COMPLETE:0:1}" != "~" ]; then
			# Use ls so as to add the '/' at the end of directories.
			COMPREPLY=(\`ls -dp \${TO_COMPLETE}* 2> /dev/null\`)
		fi
	fi
fi

# tcsh does not automatically remove duplicates, so we do it ourselves
echo "\${COMPREPLY[*]}" | sort | uniq

# If there is a single completion and it is a directory, we output it
# a second time to trick tcsh into not adding a space after it.
if [ \${#COMPREPLY[*]} -eq 1 ] && [ "\${COMPREPLY[0]: -1}" == "/" ]; then
	echo "\${COMPREPLY[*]}"
fi

EOF

# Don't need this variable anymore, so don't pollute the users environment
unset __git_tcsh_completion_original_script

complete git  'p,*,`bash ${__git_tcsh_completion_script} git "${COMMAND_LINE}"`,'
complete gitk 'p,*,`bash ${__git_tcsh_completion_script} gitk "${COMMAND_LINE}"`,'

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