Print a nicer error when failing to create xdg directories

When the config or cache directories fail to get created for whichever
reason, we currently exit gitui with a pretty undescriptive error.

This at least prints the relevant path so that the user can attempt to
fix them.

Fixes #2652.

Author: linkmauve

CHANGELOG.md

@@ -31,6 +31,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixes
 * resolve `core.hooksPath` relative to `GIT_WORK_TREE` [[@naseschwarz](https://github.com/naseschwarz)] ([#2571](https://github.com/gitui-org/gitui/issues/2571))
 * yanking commit ranges no longer generates incorrect dotted range notations, but lists each individual commit [[@naseschwarz](https://github.com/naseschwarz)] (https://github.com/gitui-org/gitui/issues/2576)
+* print slightly nicer errors when failing to create a directory [[@linkmauve](https://github.com/linkmauve)] (https://github.com/gitui-org/gitui/pull/2728)
 
 ## [0.27.0] - 2024-01-14
 

src/args.rs

@@ -49,7 +49,10 @@ pub fn process_cmdline() -> Result<CliArgs> {
 		.map_or_else(|| PathBuf::from("theme.ron"), PathBuf::from);
 
 	let confpath = get_app_config_path()?;
-	fs::create_dir_all(&confpath)?;
+	if let Err(err) = fs::create_dir_all(&confpath) {
+		eprintln!("Impossible to create the config directory {confpath:?}:");
+		return Err(err.into());
+	}
 	let theme = confpath.join(arg_theme);
 
 	let notify_watcher: bool =
@@ -154,7 +157,10 @@ fn get_app_cache_path() -> Result<PathBuf> {
 		.ok_or_else(|| anyhow!("failed to find os cache dir."))?;
 
 	path.push("gitui");
-	fs::create_dir_all(&path)?;
+	if let Err(err) = fs::create_dir_all(&path) {
+		eprintln!("Impossible to create the cache directory {path:?}:");
+		return Err(err.into());
+	}
 	Ok(path)
 }