Include files based on `git diff` instead of `grep`

When including untracked files, grep was used to find the tracked source
file in the list of changed files. Now, git-diff is used to detect the
change. It allows to use source files outside of $SYNCROOT.

Source file paths starting with / are seen relative to the Git working
tree, even if --syncroot is specified.

git-ftp

@@ -618,18 +618,16 @@ add_include_files() {
 	grep '^!' "$TMP_GITFTP_INCLUDE" | sed 's/^!//' | while read TARGET; do
 		add_include_file "$TARGET"
 	done
-	# test if grep knows --null-data (GNU grep) or not (OSX grep)
-	if echo 'test' | grep -q --null-data 'test' 2> /dev/null; then
-		cat "$TMP_GITFTP_UPLOAD" "$TMP_GITFTP_DELETE" > "$tmp_include_sources"
-		grep_cmd='grep --null-data'
-	else
-		cat "$TMP_GITFTP_UPLOAD" "$TMP_GITFTP_DELETE" | tr "\0" "\n" > "$tmp_include_sources"
-		grep_cmd='grep'
-	fi
+	local AGAINST="${DEPLOYED_SHA1:-"$(git hash-object -t tree /dev/null)"}"
 	grep ':' "$TMP_GITFTP_INCLUDE" | while read LINE; do
-		local TARGET=${LINE%%:*}
-		local SOURCE=${LINE#*:}
-		if $grep_cmd -Fxq "$SOURCE" "$tmp_include_sources"; then
+		local TARGET="${LINE%%:*}"
+		local SOURCE="${LINE#*:}"
+		if echo "$SOURCE" | grep '^/'; then
+			SOURCE="${SOURCE%%/*}"
+		elif [ -n "$SYNCROOT" ]; then
+			SOURCE="$SYNCROOT/$SOURCE"
+		fi
+		if ! git diff --quiet "$AGAINST" -- "$SOURCE"; then
 			add_include_file "$TARGET"
 		fi
 	done

man/git-ftp.1.md

@@ -246,6 +246,12 @@ Whenever one of the tracked files changes, the upload of the paired untracked fi
 
 If a local untracked file is deleted, a paired tracked file will trigger the deletion of the remote file on the server.
 
+When using the `--syncroot` option, all paths are relative to the set syncroot.
+If your source file is outside the syncroot, add a / and define a path relative to the Git working directory.
+
+	# upload "dist/style.css" with syncroot "dist"
+	style.css:/style.scss
+
 It is also possible to upload whole directories.
 For example, if you use a package manager like composer, you can upload all vendor packages when the file composer.lock changes:
 

tests/git-ftp-test.sh

@@ -440,11 +440,9 @@ test_ignore_wildcard_files() {
 }
 
 test_include_init() {
-	cd $GIT_PROJECT_PATH
 	echo 'unversioned' > unversioned.txt
 	echo 'unversioned.txt' >> .gitignore
 	echo 'unversioned.txt:test 1.txt' > .git-ftp-include
-	echo 'new content' >> 'test 1.txt'
 	git add .
 	git commit -m 'unversioned file unversioned.txt should be uploaded with test 1.txt' > /dev/null
 	init=$($GIT_FTP init)
@@ -596,6 +594,23 @@ test_include_similar() {
 	assertTrue 'templates/foo.html was not uploaded' "remote_file_exists 'templates/foo.html'"
 }
 
+# resolves issue #245
+test_include_syncroot() {
+	syncroot="dist"
+	targetfile="main.css"
+	target="$syncroot/$targetfile"
+	source="main.scss"
+	touch "$source"
+	mkdir "$syncroot"
+	touch "$target"
+	echo "$syncroot" > ".gitignore"
+	echo "$target:/$source" > ".git-ftp-include"
+	git add . > /dev/null
+	git commit -a -m "test uploading only dist files" -q
+	init=$($GIT_FTP init --syncroot "$syncroot")
+	assertTrue "remote file '$targetfile'" "remote_file_exists '$targetfile'"
+}
+
 test_hidden_file_only() {
 	cd $GIT_PROJECT_PATH
 	echo "test" > .htaccess