Tools: unitc edit mode for interactive configuration.

tools/README.md

@@ -35,6 +35,7 @@ web page with NGINX Unit.
 |---------|-|
 | filename … | Read configuration data consequently from the specified files instead of stdin.
 | _HTTP method_ | It is usually not required to specify a HTTP method. `GET` is used to read the configuration. `PUT` is used when making configuration changes unless a specific method is provided.
+| `edit` | Opens **URI** in the default editor for interactive configuration. The [jq](https://stedolan.github.io/jq/) tool is required for this option.
 | `INSERT` | A _virtual_ HTTP method that prepends data when the URI specifies an existing array. The [jq](https://stedolan.github.io/jq/) tool is required for this option.
 | `-q` \| `--quiet` | No output to stdout.
 

tools/unitc

@@ -32,7 +32,7 @@ while [ $# -gt 0 ]; do
 			shift
 			;;
 
-		"GET" | "PUT" | "POST" | "DELETE" | "INSERT")
+		"GET" | "PUT" | "POST" | "DELETE" | "INSERT" | "EDIT")
 			METHOD=$OPTION
 			shift
 			;;
@@ -71,6 +71,7 @@ USAGE: ${0##*/} [options] URI
 General options
   filename …    # Read configuration data from files instead of stdin
   HTTP method   # Default=GET, or PUT with config data (case-insensitive)
+  EDIT          # Opens the URI contents in \$EDITOR
   INSERT        # Virtual HTTP method to prepend data to an existing array
   -q | --quiet  # No output to stdout
 
@@ -205,6 +206,29 @@ fi
 if [ -t 0 ] && [ ${#CONF_FILES[@]} -eq 0 ]; then
 	if [ "$METHOD" = "DELETE" ]; then
 		$SSH_CMD curl -X $METHOD $UNIT_CTRL$URI 2> /tmp/${0##*/}.$$ | $OUTPUT
+	elif [ "$METHOD" = "EDIT" ]; then
+		EDITOR=$(test "$EDITOR" && printf '%s' "$EDITOR" || command -v editor || command -v vim || echo vi)
+		EDIT_FILENAME=/tmp/${0##*/}.$$${URI//\//_}
+		$SSH_CMD curl -fsS $UNIT_CTRL$URI > $EDIT_FILENAME || exit 2
+		if [ "${URI:0:12}" = "/js_modules/" ]; then
+			if ! hash jq 2> /dev/null; then
+				echo "${0##*/}: ERROR: jq(1) is required to edit JavaScript modules; install at <https://stedolan.github.io/jq/>"
+				exit 1
+			fi
+			jq -r < $EDIT_FILENAME > $EDIT_FILENAME.js # Unescape linebreaks for a better editing experience
+			EDIT_FILE=$EDIT_FILENAME.js
+			$EDITOR $EDIT_FILENAME.js || exit 2
+			# Remove the references, delete old config, push new config+reference
+			$SSH_CMD curl -fsS $UNIT_CTRL/config/settings/js_module > /tmp/${0##*/}.$$_js_module && \
+			$SSH_CMD curl -X DELETE $UNIT_CTRL/config/settings/js_module && \
+			$SSH_CMD curl -fsSX DELETE $UNIT_CTRL$URI 2> /tmp/${0##*/}.$$ && \
+			printf "%s" "$(< $EDIT_FILENAME.js)" | $SSH_CMD curl -fX PUT --data-binary @- $UNIT_CTRL$URI 2> /tmp/${0##*/}.$$ && \
+			$SSH_CMD curl -X PUT --data-binary @/tmp/${0##*/}.$$_js_module $UNIT_CTRL/config/settings/js_module 2> /tmp/${0##*/}.$$
+		else
+			tr -d '\r' < $EDIT_FILENAME > $EDIT_FILENAME.json # Remove carriage-return from newlines
+			$EDITOR $EDIT_FILENAME.json || exit 2
+			$SSH_CMD curl -X PUT --data-binary @$EDIT_FILENAME.json $UNIT_CTRL$URI 2> /tmp/${0##*/}.$$ | $OUTPUT
+		fi
 	else
 		SHOW_LOG=$(echo $URI | grep -c ^/control/)
 		$SSH_CMD curl $UNIT_CTRL$URI 2> /tmp/${0##*/}.$$ | $OUTPUT
@@ -240,7 +264,7 @@ if [ $CURL_STATUS -ne 0 ]; then
 	fi
 	exit 4
 fi
-rm -f /tmp/${0##*/}.$$ 2> /dev/null
+rm -f /tmp/${0##*/}.$$* 2> /dev/null
 
 if [ $SHOW_LOG -gt 0 ] && [ $NOLOG -eq 0 ] && [ $QUIET -eq 0 ]; then
 	echo -n "${0##*/}: Waiting for log..."