add bash-it

2022-05-05 22:20:02 +02:00
parent 6a62a35d0d
commit 43701f0590
490 changed files with 33047 additions and 0 deletions
@@ -0,0 +1,112 @@
+# shellcheck shell=bash
+about-plugin 'Automatic completion of aliases'
+# Load after all aliases and completions to understand what needs to be completed
+# BASH_IT_LOAD_PRIORITY: 800
+
+# References:
+# http://superuser.com/a/437508/119764
+# http://stackoverflow.com/a/1793178/1228454
+
+# Automatically add completion for all aliases to commands having completion functions
+function _bash-it-component-completion-callback-on-init-aliases() {
+	local namespace="alias_completion"
+	local tmp_file completion_loader alias_name line completions chars
+	local alias_arg_words new_completion compl_func compl_wrapper alias_defn
+
+	# create array of function completion triggers, keeping multi-word triggers together
+	IFS=$'\n' read -d '' -ra completions < <(complete -p)
+	((${#completions[@]} == 0)) && return 0
+
+	completions=("${completions[@]##complete -* * -}") # strip all but last option plus trigger(s)
+	completions=("${completions[@]#complete -}")       # strip anything missed
+	completions=("${completions[@]#? * }")             # strip last option and arg, leaving only trigger(s)
+	completions=("${completions[@]#? }")       # strip anything missed
+	#TODO: this will fail on some completions...
+
+	# create temporary file for wrapper functions and completions
+	tmp_file="$(mktemp -t "${namespace}-${RANDOM}XXXXXX")" || return 1
+
+	IFS=$'\n' read -r completion_loader < <(complete -p -D 2> /dev/null)
+	if [[ "${completion_loader#complete }" =~ '-F'[[:space:]]([[:alnum:]_]+)[[:space:]] ]]; then
+		completion_loader="${BASH_REMATCH[1]}"
+	else
+		completion_loader=""
+	fi
+
+	# read in "<alias> '<aliased command>' '<command args>'" lines from defined aliases
+	# some aliases do have backslashes that needs to be interpreted
+	# shellcheck disable=SC2162
+	while read line; do
+		line="${line#alias -- }"
+		line="${line#alias }"
+		alias_name="${line%%=*}"
+		alias_defn="${line#*=\'}"                 # alias definition
+		alias_defn="${alias_defn%\'}"
+		alias_cmd="${alias_defn%%[[:space:]]*}" # first word of alias
+		if [[ ${alias_defn} == ${alias_cmd} ]]; then
+			alias_args=''
+		else
+			alias_args="${alias_defn#*[[:space:]]}" # everything after first word
+		fi
+
+		# skip aliases to pipes, boolean control structures and other command lists
+		chars='\|\&\;\)\(\n\<\>'
+		if [[ "${alias_defn}" =~ [$chars] ]]; then
+			continue
+		fi
+		# avoid expanding wildcards
+		read -ra alias_arg_words <<< "$alias_args"
+
+		# skip alias if there is no completion function triggered by the aliased command
+		if ! _bash-it-array-contains-element "$alias_cmd" "${completions[@]}"; then
+			if [[ -n "$completion_loader" ]]; then
+				# force loading of completions for the aliased command
+				"${completion_loader:?}" "${alias_cmd}"
+				# 124 means completion loader was successful
+				[[ $? -eq 124 ]] || continue
+				completions+=("$alias_cmd")
+			else
+				continue
+			fi
+		fi
+		new_completion="$(complete -p "$alias_cmd" 2> /dev/null)"
+
+		# create a wrapper inserting the alias arguments if any
+		if [[ -n $alias_args ]]; then
+			compl_func="${new_completion/#* -F /}"
+			compl_func="${compl_func%% *}"
+			# avoid recursive call loops by ignoring our own functions
+			if [[ "${compl_func#_"$namespace"::}" == "$compl_func" ]]; then
+				compl_wrapper="_${namespace}::${alias_name}"
+				echo "function $compl_wrapper {
+                        local compl_word=\${2?}
+                        local prec_word=\${3?}
+                        # check if prec_word is the alias itself. if so, replace it
+                        # with the last word in the unaliased form, i.e.,
+                        # alias_cmd + ' ' + alias_args.
+                        if [[ \$COMP_LINE == \"\$prec_word \$compl_word\" ]]; then
+                            prec_word='$alias_cmd $alias_args'
+                            prec_word=\${prec_word#* }
+                        fi
+                        (( COMP_CWORD += ${#alias_arg_words[@]} ))
+                        COMP_WORDS=(\"$alias_cmd\" \"${alias_arg_words[@]}\" \"\${COMP_WORDS[@]:1}\")
+                        (( COMP_POINT -= \${#COMP_LINE} ))
+                        COMP_LINE=\${COMP_LINE/$alias_name/$alias_cmd $alias_args}
+                        (( COMP_POINT += \${#COMP_LINE} ))
+                        \"$compl_func\" \"$alias_cmd\" \"\$compl_word\" \"\$prec_word\"
+                    }" >> "$tmp_file"
+				new_completion="${new_completion/ -F $compl_func / -F $compl_wrapper }"
+			fi
+		fi
+
+		# replace completion trigger by alias
+		if [[ -n $new_completion ]]; then
+			new_completion="${new_completion% *} $alias_name"
+			echo "$new_completion" >> "$tmp_file"
+		fi
+	done < <(alias -p)
+	# shellcheck source=/dev/null
+	source "$tmp_file" && command rm -f "$tmp_file"
+}
+
+_bash-it-component-completion-callback-on-init-aliases