[PATCH 07/10] completion: bash: refactor _get_comp_words_by_ref()

From: Felipe Contreras <felipe.contreras@gmail.com>
To: git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>,
	"SZEDER Gábor" <szeder.dev@gmail.com>,
	"Felipe Contreras" <felipe.contreras@gmail.com>
Subject: [PATCH 07/10] completion: bash: refactor _get_comp_words_by_ref()
Date: Wed,  4 Nov 2020 11:47:13 -0600	[thread overview]
Message-ID: <20201104174716.783348-8-felipe.contreras@gmail.com> (raw)
In-Reply-To: <20201104174716.783348-1-felipe.contreras@gmail.com>

We don't need a separate function to do what we already know we want to
do.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
---
 contrib/completion/git-completion.bash | 93 +++++++++++---------------
 1 file changed, 39 insertions(+), 54 deletions(-)

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 1bd81dcc9c..f856db148b 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -186,21 +186,11 @@ __git_dequote ()
 #
 #   RELEASE: 2.x
 
-# This function can be used to access a tokenized list of words
-# on the command line:
-#
-#	__git_reassemble_comp_words_by_ref '=:'
-#	if test "${words_[cword_-1]}" = -w
-#	then
-#		...
-#	fi
-#
-# The argument should be a collection of characters from the list of
-# word completion separators (COMP_WORDBREAKS) to treat as ordinary
-# characters.
+# This function reorganizes the words on the command line to be processed by
+# the rest of the script.
 #
 # This is roughly equivalent to going back in time and setting
-# COMP_WORDBREAKS to exclude those characters.  The intent is to
+# COMP_WORDBREAKS to exclude '=' and ':'.  The intent is to
 # make option types like --date=<type> and <rev>:<path> easy to
 # recognize by treating each shell word as a single token.
 #
@@ -208,60 +198,55 @@ __git_dequote ()
 # shared with other completion scripts.  By the time the completion
 # function gets called, COMP_WORDS has already been populated so local
 # changes to COMP_WORDBREAKS have no effect.
-#
-# Output: words_, cword_, cur_.
 
-__git_reassemble_comp_words_by_ref()
+if ! type _get_comp_words_by_ref >/dev/null 2>&1; then
+_get_comp_words_by_ref ()
 {
+	local words_ cword_
 	local exclude i j first
+
 	# Which word separators to exclude?
-	exclude="${1//[^$COMP_WORDBREAKS]}"
+	exclude="${COMP_WORDBREAKS//[^=:]}"
 	cword_=$COMP_CWORD
 	if [ -z "$exclude" ]; then
 		words_=("${COMP_WORDS[@]}")
-		return
-	fi
-	# List of word completion separators has shrunk;
-	# re-assemble words to complete.
-	for ((i=0, j=0; i < ${#COMP_WORDS[@]}; i++, j++)); do
-		# Append each nonempty word consisting of just
-		# word separator characters to the current word.
-		first=t
-		while
-			[ $i -gt 0 ] &&
-			[ -n "${COMP_WORDS[$i]}" ] &&
-			# word consists of excluded word separators
-			[ "${COMP_WORDS[$i]//[^$exclude]}" = "${COMP_WORDS[$i]}" ]
-		do
-			# Attach to the previous token,
-			# unless the previous token is the command name.
-			if [ $j -ge 2 ] && [ -n "$first" ]; then
-				((j--))
-			fi
-			first=
+	else
+		# List of word completion separators has shrunk;
+		# re-assemble words to complete.
+		for ((i=0, j=0; i < ${#COMP_WORDS[@]}; i++, j++)); do
+			# Append each nonempty word consisting of just
+			# word separator characters to the current word.
+			first=t
+			while
+				[ $i -gt 0 ] &&
+				[ -n "${COMP_WORDS[$i]}" ] &&
+				# word consists of excluded word separators
+				[ "${COMP_WORDS[$i]//[^$exclude]}" = "${COMP_WORDS[$i]}" ]
+			do
+				# Attach to the previous token,
+				# unless the previous token is the command name.
+				if [ $j -ge 2 ] && [ -n "$first" ]; then
+					((j--))
+				fi
+				first=
+				words_[$j]=${words_[j]}${COMP_WORDS[i]}
+				if [ $i = $COMP_CWORD ]; then
+					cword_=$j
+				fi
+				if (($i < ${#COMP_WORDS[@]} - 1)); then
+					((i++))
+				else
+					# Done.
+					break 2
+				fi
+			done
 			words_[$j]=${words_[j]}${COMP_WORDS[i]}
 			if [ $i = $COMP_CWORD ]; then
 				cword_=$j
 			fi
-			if (($i < ${#COMP_WORDS[@]} - 1)); then
-				((i++))
-			else
-				# Done.
-				return
-			fi
 		done
-		words_[$j]=${words_[j]}${COMP_WORDS[i]}
-		if [ $i = $COMP_CWORD ]; then
-			cword_=$j
-		fi
-	done
-}
+	fi
 
-if ! type _get_comp_words_by_ref >/dev/null 2>&1; then
-_get_comp_words_by_ref ()
-{
-	local words_ cword_
-	__git_reassemble_comp_words_by_ref "=:"
 	cword=$cword_
 	cur=${words_[cword]}
 	prev=${words_[cword-1]}
-- 
2.29.2

