Adds update command for externally modified files

This can be used when a file is modified externally. It will update the
sqlite database and potentially run git commands for the change.

If there are 2 files provided, it assumes that the file was moved. The
first filename should be the old file.

The new, edit and delete functions were also re factored slightly to use
this new update function.

Relevant to #4
Close #2
Close #1

kb

@@ -178,15 +178,26 @@ findFile(){
 	fi
 }
 
+fileInDB(){
+	local ids
+	ids="$(echo "SELECT id FROM items WHERE filename = '$(safeSQL "$1")'" |
+			sqlite3 "${sqliteFile}")"
+	[ -n "$ids" ] && return 0
+	return 1
+}
+
 externalgit(){
 	cd "$dataDir" || return
 	git "$@"
 }
 
 # This function will add and commit a file after it has been edited
+# If 2 arguments are given, it assumes a rename has taken place.
+# The first should be the old file (like mv)
 gitChange(){
 	cd "$dataDir" || return
 	local filename="$1"
+	local newFilename="$2"
 	if [ "$dogit" -gt 0 ]; then
 		if [ -f "$filename" ]; then
 			if ! git diff --exit-code "$filename" > /dev/null 2>&1; then
@@ -198,6 +209,16 @@ gitChange(){
 				git add "$filename"
 				git commit -m "KB auto-commit: New: $filename"
 			fi
+		else
+			# If the file name doesn't exist, we have probably moved it
+			if [ -n "$newFilename" ] && [ -f "$newFilename" ]; then
+				git add "$filename" "$newFilename"
+				git commit -m "KB auto-commit: move: $filename -> $newFilename"
+			else
+				# if we get here, the file has been deleted
+				git add "$filename"
+				git commit -m "KB auto-commit: delete: $filename"
+			fi
 		fi
 	fi
 }
@@ -293,7 +314,7 @@ mainScript() {
 	if [ "${args[0]}" != "init" ]; then
 		cd "$dataDir" || return
 		# Check to see if datadir is a git repo
-		if git rev-parse 2> /dev/null; then
+		if ! git rev-parse 2> /dev/null; then
 			# If not, ensure we don't run git commands
 			dogit=0
 		fi
@@ -307,6 +328,7 @@ mainScript() {
 		list-tags) listTags "${args[@]:1}"; safeExit ;; 
 		view) viewFile "${args[@]:1}"; safeExit ;;
 		fuzzy) fuzzySelect "${args[@]:1}"; safeExit ;;
+		update) updateFileChange "${args[@]:1}"; safeExit ;;
 		deepsearch) deepSearch "${args[@]:1}"; safeExit ;;
 		del|delete) deleteFile "${args[@]:1}"; safeExit ;;
 		git) externalgit "${args[@]:1}"; safeExit ;;
@@ -348,6 +370,8 @@ usage() {
 		--noheader          Don't include the header
 	list-tags               Lists tags with the number of times its used
 		--noheader          Don't include the header
+	update <file> [<file>]  Updates the database and git repo of a changed file
+	                        If 2 files are given, it assumes a move
 	view                    View a file
 	fuzzy [command]         Fuzzy select a file
 		command is what to do with the selected file