chore: Minor changes to use more idiomatic Rust (integer max values; complicates nested expressions) (#6090)

* chore: use current way to get max value of an integer type

The std::usize::MAX way has been obsolete for quite some time now.
Found by clippy (clippy::legacy_numeric_constants).

Signed-off-by: Lars Wirzenius <liw@liw.fi>

* chore: use helper variable for a more idiomatic pattern matching

A nested expression can be harder to understand than two simpler
expressions. (Found by clippy lint clippy::blocks_in_conditions.)

Signed-off-by: Lars Wirzenius <liw@liw.fi>

---------

Signed-off-by: Lars Wirzenius <liw@liw.fi>
Co-authored-by: Lars Wirzenius <liw@liw.fi>

src/configs/fossil_branch.rs

@@ -22,7 +22,7 @@ impl<'a> Default for FossilBranchConfig<'a> {
             format: "on [$symbol$branch]($style) ",
             symbol: " ",
             style: "bold purple",
-            truncation_length: std::i64::MAX,
+            truncation_length: i64::MAX,
             truncation_symbol: "…",
             disabled: true,
         }

src/configs/git_branch.rs

@@ -25,7 +25,7 @@ impl<'a> Default for GitBranchConfig<'a> {
             format: "on [$symbol$branch(:$remote_branch)]($style) ",
             symbol: " ",
             style: "bold purple",
-            truncation_length: std::i64::MAX,
+            truncation_length: i64::MAX,
             truncation_symbol: "…",
             only_attached: false,
             always_show_remote: false,

src/configs/hg_branch.rs

@@ -22,7 +22,7 @@ impl<'a> Default for HgBranchConfig<'a> {
             symbol: " ",
             style: "bold purple",
             format: "on [$symbol$branch(:$topic)]($style) ",
-            truncation_length: std::i64::MAX,
+            truncation_length: i64::MAX,
             truncation_symbol: "…",
             disabled: true,
         }

src/configs/meson.rs

@@ -19,7 +19,7 @@ pub struct MesonConfig<'a> {
 impl<'a> Default for MesonConfig<'a> {
     fn default() -> Self {
         MesonConfig {
-            truncation_length: std::u32::MAX,
+            truncation_length: u32::MAX,
             truncation_symbol: "…",
             format: "via [$symbol$project]($style) ",
             symbol: "⬢ ",

src/configs/pijul_channel.rs

@@ -22,7 +22,7 @@ impl<'a> Default for PijulConfig<'a> {
             symbol: " ",
             style: "bold purple",
             format: "on [$symbol$channel]($style) ",
-            truncation_length: std::i64::MAX,
+            truncation_length: i64::MAX,
             truncation_symbol: "…",
             disabled: true,
         }

src/modules/fossil_branch.rs

@@ -33,7 +33,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
             "\"truncation_length\" should be a positive value, found {}",
             config.truncation_length
         );
-        std::usize::MAX
+        usize::MAX
     } else {
         config.truncation_length as usize
     };

src/modules/git_branch.rs

@@ -19,7 +19,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
             "\"truncation_length\" should be a positive value, found {}",
             config.truncation_length
         );
-        std::usize::MAX
+        usize::MAX
     } else {
         config.truncation_length as usize
     };

src/modules/git_status.rs

@@ -426,13 +426,13 @@ fn git_status_wsl(context: &Context, conf: &GitStatusConfig) -> Option<String> {
     log::trace!("Using WSL mode");
 
     // Get Windows path
-    let winpath = match create_command("wslpath")
+    let wslpath = create_command("wslpath")
         .map(|mut c| {
             c.arg("-w").arg(&context.current_dir);
             c
         })
-        .and_then(|mut c| c.output())
+        .and_then(|mut c| c.output());
-    {
+    let winpath = match wslpath {
         Ok(r) => r,
         Err(e) => {
             // Not found might means this might not be WSL after all
@@ -472,7 +472,7 @@ fn git_status_wsl(context: &Context, conf: &GitStatusConfig) -> Option<String> {
         |e| e + ":STARSHIP_CONFIG/wp",
     );
 
-    let out = match create_command(starship_exe)
+    let exe = create_command(starship_exe)
         .map(|mut c| {
             c.env(
                 "STARSHIP_CONFIG",
@@ -484,8 +484,9 @@ fn git_status_wsl(context: &Context, conf: &GitStatusConfig) -> Option<String> {
             .args(["module", "git_status", "--path", winpath]);
             c
         })
-        .and_then(|mut c| c.output())
+        .and_then(|mut c| c.output());
-    {
+
+    let out = match exe {
         Ok(r) => r,
         Err(e) => {
             log::error!("Failed to run Git Status module on Windows:\n{}", e);

src/modules/hg_branch.rs

@@ -26,7 +26,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
             "\"truncation_length\" should be a positive value, found {}",
             config.truncation_length
         );
-        std::usize::MAX
+        usize::MAX
     } else {
         config.truncation_length as usize
     };