Don't fail if there are no Github extensions (fix #877)

.vscode/topgrade.code-snippets

@@ -0,0 +1,25 @@
+{
+	// Place your topgrade workspace snippets here. Each snippet is defined under a snippet name and has a scope, prefix, body and 
+	// description. Add comma separated ids of the languages where the snippet is applicable in the scope field. If scope 
+	// is left empty or omitted, the snippet gets applied to all languages. The prefix is what is 
+	// used to trigger the snippet and the body will be expanded and inserted. Possible variables are: 
+	// $1, $2 for tab stops, $0 for the final cursor position, and ${1:label}, ${2:another} for placeholders. 
+	// Placeholders with the same ids are connected.
+	// Example:
+	// "Print to console": {
+	// 	"scope": "javascript,typescript",
+	// 	"prefix": "log",
+	// 	"body": [
+	// 		"console.log('$1');",
+	// 		"$2"
+	// 	],
+	// 	"description": "Log output to console"
+	// }
+	"Skip Step": {
+		"scope": "rust",
+		"prefix": "skipstep",
+		"body": [
+			"return Err(SkipStep(format!(\"$1\").into()));"
+		]
+	}
+}

src/steps/generic.rs

@@ -478,6 +478,11 @@ pub fn spicetify_upgrade(ctx: &ExecutionContext) -> Result<()> {
 
 pub fn run_ghcli_extensions_upgrade(ctx: &ExecutionContext) -> Result<()> {
     let gh = utils::require("gh")?;
+    let result = Command::new(&gh).args(&["extensions", "list"]).check_output();
+    if result.is_err() {
+        debug!("GH result {:?}", result);
+        return Err(SkipStep(String::from("GH failed")).into());
+    }
 
     print_separator("GitHub CLI Extensions");
     ctx.run_type()

src/steps/os/windows.rs

@@ -70,7 +70,7 @@ fn get_wsl_distributions(wsl: &Path) -> Result<Vec<String>> {
     Ok(output
         .lines()
         .filter(|s| !s.is_empty())
-        .map(|x| x.replace("\u{0}", "").replace('\r', ""))
+        .map(|x| x.replace('\u{0}', "").replace('\r', ""))
         .collect())
 }