fix noisy app detection on headless environments

/close #192

commands/edit

@@ -119,7 +119,7 @@ function edit_() (
 
 	# grab options
 	local editors=()
-	if test "$terminal" = 'yes' -o "$sudo" = 'yes'; then
+	if test "$terminal" = 'yes'; then
 		editors=("${TERMINAL_EDITORS[@]}")
 	else
 		editors=("${GUI_EDITORS[@]}")
@@ -159,7 +159,7 @@ function edit_() (
 
 				# it exists, use it
 				break
-			elif get-app "$command" >/dev/null; then
+			elif test "$terminal" = 'no' && get-app "$command" >/dev/null; then
 				# apps require prompts
 				if test "$prompt" = 'yes'; then
 					mapfile -t array < <(echo-split ' ' -- "$string")

commands/get-app

@@ -106,13 +106,22 @@ function get_app() (
 			fi
 		fi
 		if test "$can_find" = 'no'; then
-			echo-error 'Install Winget or Scoop to be able to detect applications on WSL'
+			if test "$quiet" != 'yes'; then
+				echo-error "Unable to detect application [$name] on WSL. Install Winget or Scoop."
+			fi
 			return 6 # ENXIO 6 Device not configured
 		fi
 		# wasn't found
 		return 1
+	elif is-headless; then
+		if test "$quiet" != 'yes'; then
+			echo-style --notice="Skipping detection of application [$name] on headless system." >/dev/stderr
+		fi
+		return 1
 	else
-		echo-error 'Support for Applications not added yet for this platform.'
+		if test "$quiet" != 'yes'; then
+			echo-error "Unable to detect application [$name] on Linux. Submit a PR to support it."
+		fi
 		return 19 # ENODEV 19 Operation not supported by device
 	fi
 )

commands/git-helper

@@ -466,14 +466,14 @@ function git_helper() (
 	}
 
 	function git_review {
-		if get-app --quiet 'Gitfox.app'; then
-			open-app 'Gitfox.app' -- "$@"
-		elif get-app --quiet 'Tower.app'; then
-			open-app 'Tower.app' -- "$@"
-		elif command-exists gf; then
+		if command-exists gf; then
 			gf "$@"
+		elif get-app --quiet 'Gitfox.app'; then
+			open-app 'Gitfox.app' -- "$@"
 		elif command-exists tower; then
 			tower "$@"
+		elif get-app --quiet 'Tower.app'; then
+			open-app 'Tower.app' -- "$@"
 		else
 			help "No supported git reviewers installed."
 		fi