[patch] Patch to add Wilke Schwiedop's bash completion script changes

eselect-1.0.11-fix-bash-completion.patch (text/plain), 5.13 KB, created by Colin Shapiro on 2009-02-15 22:58:07 UTC

--- misc/eselect.bashcomp.old	2009-02-15 16:44:47.000000000 -0600
+++ misc/eselect.bashcomp	2009-02-15 16:45:08.000000000 -0600
@@ -1,29 +1,108 @@
-# Copyright 1999-2005 Gentoo Foundation
+# Completion for eselect [<global options>] <module> <action> [<options>]
+# Author: Wilke Schwiedop <[e-mail]>
 # Distributed under the terms of the GNU General Public License v2
-# $Id$
-
-# bash command-line completion for eselect
-# Author: Aaron Walker <[e-mail]>
 
 _eselect() {
-    local cur prev sedcmd possibles
-    COMPREPLY=()
-    cur="${COMP_WORDS[COMP_CWORD]}"
-    prev="${COMP_WORDS[COMP_CWORD-1]}"
-    sedcmd='sed -n -e s/^[[:space:]]\+.*1m\([^[:space:]][[:alnum:]-]\+\).*[[:space:]]\+.*$/\1/p'
-
-    if [[ ${COMP_CWORD} -eq 1 ]] || [[ -n "${prev}" && ${prev} == -* ]]
-    then
-        possibles="$(eselect help | ${sedcmd})"
-    elif eselect ${prev} usage &>/dev/null ; then
-        possibles=$(eselect ${prev} usage | ${sedcmd})
-    fi
+	local curr=${COMP_WORDS[COMP_CWORD]} possibles="" module_index=1
+
+	# Unset default completion
+	COMPREPLY=()
+
+	# Unfortunatly we can't source eselect to get to the variables directly, so this is a bit more complicated
+	local ESELECT_DATA_PATH ESELECT_MODULES_PATH
 
-    [[ -n "${possibles}" ]] && \
-        COMPREPLY=( $(compgen -W "${possibles}" -- ${cur}) )
+	# Obtain ESELECT_DATA_PATH and ESELECT_MODULES_PATH . See eselect for more info
+	ESELECT_DATA_PATH=$(sed -n -e 's/^ESELECT_DATA_PATH="\(.\+\)"$/\1/p' $(which eselect))
+	ESELECT_MODULES_PATH=( "${HOME}/.eselect/modules" "${ESELECT_DATA_PATH}/modules" )
+
+	# Hard-coded Actions.
+	# Note: list-modules is hardcoded aswell, but not used in the modules. list-modules is added only when needed.
+	ESELECT_KNOWN_ACTIONS="help usage version"
+	# Hard-coded Options
+	# TODO These could be read from ESELECT_KNOWN_OPTIONS
+	ESELECT_KNOWN_OPTIONS="--no-colour"
+
+	# If any word in ${COMP_WORDS[@]} is a default-action, we don't need further completion
+	for i in ${COMP_WORDS[@]} ; do
+		[[ $i == @(${ESELECT_KNOWN_ACTIONS//[[:space:]]/"|"}|list-modules) ]] && return 0
+	done
+
+	# Skip all global-options
+	while [[ ${COMP_WORDS[module_index]} == -* ]] ; do
+		((++module_index))
+	done
+
+	# If this is true we're looking for a module name or an eselect-option. In short: "eselect <wearehere>"
+	# Since we're skipping the global options, this may be < 0 if we have nothing but options in COMP_WORDS.
+	if [[ $((COMP_CWORD-module_index)) -le 0 ]] ; then
+		local path file
+		for path in "${ESELECT_MODULES_PATH[@]}" ; do
+			[[ -d ${path} ]] || continue
+			for file in ${path}/*.eselect ; do
+				[[ -f ${file} ]] || continue
+				file=${file##*/}       # strip path
+				file=${file%%.eselect} # strip extension
+				possibles+=" ${file}"
+			done
+		done
+		
+		possibles+=" list-modules ${ESELECT_KNOWN_ACTIONS}" # Include default actions and list-modules
+		possibles+=" ${ESELECT_KNOWN_OPTIONS}" # Include default options
+
+	# We already have a module, so we're looking for an action or even and option
+	# In short: "eselect somemodule <wearehere> <orevenhere>"
+	else
+		local modname=${COMP_WORDS[module_index]} modpath="" modfile=""
+		for modpath in "${ESELECT_MODULES_PATH[@]}" ; do
+			modfile="${modpath}/${modname}.eselect"
+			[[ -f ${modfile} ]] && break
+		done
+		[[ -f ${modfile} ]] || return 1 # 404 File not found, so theres no way we get the info we need
+
+		
+		# We're looking for an action; In short: "eselect somemodule <wearehere>"
+		if [[ $((COMP_CWORD-module_index)) -eq 1 ]] ; then
+			possibles+=" ${ESELECT_KNOWN_ACTIONS}" # Include default actions
+		
+			# module-actions are simple bash functions in the module-file.
+			# They follow the pattern "do_${action}()" and "do_${action} ()" respectively
+			possibles+=" "
+			possibles+=$(sed -n -e 's/^do_\([^ _\(]\+\).*/\1/p' ${modfile})
+
+		# We're looking for an option.
+		# In short: "eselect somemodule someaction <wearehere>"
+		else
+			local action=${COMP_WORDS[module_index+1]}
+
+			possibles+=" "
+			possibles+=$(
+				source ${modfile} &> /dev/null
+				# functions describing options follow the pattern "describe_${action}_options()"
+				if [[ $(type -t "describe_${action}_options" ) == "function" ]] ; then
+					# we're only interested in --options-like-this
+					# TODO The regexp could be improved to match only single "-" between letters
+					echo $(describe_${action}_options | sed -n -e 's/^.*--\([[:alpha:]-]\+\).*/--\1/p')
+				fi
+			)
+		fi
+	fi
+
+	# If we already completed something, remove already used words from completion.
+	if [[ ${COMP_CWORD} -ge 2 ]] ; then
+		# Our delete candidates are ${COMP_WORDS[@] without the first ("eselect") and last word ("$curr")
+		local delete_candidates="${COMP_WORDS[@]:1:${COMP_CWORD}-1}" 
+		# Convert delete candidates to regexp
+		delete_candidates=${delete_candidates//[[:space:]]/"|"}
+		# Delete candidates begone!
+		possibles=${possibles//@($delete_candidates)/""}
+		# When removing a word, the delimiting spaces remain. Remove them aswell
+		possibles=${possibles//"  "/" "}
+	fi
 
-    return 0
+	COMPREPLY=( $(compgen -W "${possibles}" -- ${curr}) )
+
+	return 0
 }
+
 complete -F _eselect eselect
 
-# vim: set ft=sh tw=80 sw=4 et :