Mac OS fails to upgrade Homebrew in custom location (#930)

Fixes #673

.vscode/topgrade.code-snippets

@@ -19,7 +19,7 @@
 		"scope": "rust",
 		"prefix": "skipstep",
 		"body": [
-			"return Err(SkipStep(format!(\"$1\").into()));"
+			"return Err(SkipStep(format!(\"$1\")).into());"
 		]
 	},
 	"Step": {
@@ -31,5 +31,12 @@
 			"    Ok(())",
 			"}"
 		]
+	},
+	"macos": {
+		"scope": "rust",
+		"prefix": "macos",
+		"body": [
+			"#[cfg(target_os = \"macos\")]"
+		]
 	}
 }

src/main.rs

@@ -153,7 +153,7 @@ fn run() -> Result<()> {
         runner.execute(Step::ConfigUpdate, "config-update", || linux::run_config_update(&ctx))?;
 
         runner.execute(Step::BrewFormula, "Brew", || {
-            unix::run_brew_formula(&ctx, unix::BrewVariant::Linux)
+            unix::run_brew_formula(&ctx, unix::BrewVariant::Path)
         })?;
     }
 
@@ -172,12 +172,18 @@ fn run() -> Result<()> {
         runner.execute(Step::BrewFormula, "Brew (Intel)", || {
             unix::run_brew_formula(&ctx, unix::BrewVariant::MacIntel)
         })?;
+        runner.execute(Step::BrewFormula, "Brew", || {
+            unix::run_brew_formula(&ctx, unix::BrewVariant::Path)
+        })?;
         runner.execute(Step::BrewCask, "Brew Cask (ARM)", || {
             unix::run_brew_cask(&ctx, unix::BrewVariant::MacArm)
         })?;
         runner.execute(Step::BrewCask, "Brew Cask (Intel)", || {
             unix::run_brew_cask(&ctx, unix::BrewVariant::MacIntel)
         })?;
+        runner.execute(Step::BrewCask, "Brew Cask", || {
+            unix::run_brew_cask(&ctx, unix::BrewVariant::Path)
+        })?;
         runner.execute(Step::Macports, "MacPorts", || macos::run_macports(&ctx))?;
     }
 

src/steps/os/unix.rs

@@ -1,6 +1,4 @@
-#[cfg(target_os = "linux")]
-use crate::error::SkipStep;
-use crate::error::TopgradeError;
+use crate::error::{SkipStep, TopgradeError};
 use crate::execution_context::ExecutionContext;
 use crate::executor::{CommandExt, Executor, ExecutorExitStatus, RunType};
 use crate::terminal::print_separator;
@@ -23,7 +21,7 @@ const ARM_BREW: &str = "/opt/homebrew/bin/brew";
 #[derive(Copy, Clone, Debug)]
 #[allow(dead_code)]
 pub enum BrewVariant {
-    Linux,
+    Path,
     MacIntel,
     MacArm,
 }
@@ -31,12 +29,17 @@ pub enum BrewVariant {
 impl BrewVariant {
     fn binary_name(self) -> &'static str {
         match self {
-            BrewVariant::Linux => "brew",
+            BrewVariant::Path => "brew",
             BrewVariant::MacIntel => INTEL_BREW,
             BrewVariant::MacArm => ARM_BREW,
         }
     }
 
+    #[cfg(target_os = "macos")]
+    fn is_path(&self) -> bool {
+        matches!(self, BrewVariant::Path)
+    }
+
     fn both_both_exist() -> bool {
         Path::new(INTEL_BREW).exists() && Path::new(ARM_BREW).exists()
     }
@@ -65,6 +68,11 @@ impl BrewVariant {
             _ => run_type.execute(self.binary_name()),
         }
     }
+
+    #[cfg(target_os = "macos")]
+    fn is_macos_custom(binary_name: PathBuf) -> bool {
+        !(binary_name.as_os_str() == INTEL_BREW || binary_name.as_os_str() == ARM_BREW)
+    }
 }
 
 pub fn run_fisher(base_dirs: &BaseDirs, run_type: RunType) -> Result<()> {
@@ -178,7 +186,16 @@ pub fn upgrade_gnome_extensions(ctx: &ExecutionContext) -> Result<()> {
 }
 
 pub fn run_brew_formula(ctx: &ExecutionContext, variant: BrewVariant) -> Result<()> {
-    require(variant.binary_name())?;
+    #[allow(unused_variables)]
+    let binary_name = require(variant.binary_name())?;
+
+    #[cfg(target_os = "macos")]
+    {
+        if variant.is_path() && !BrewVariant::is_macos_custom(binary_name) {
+            return Err(SkipStep("Not a custom brew for macOS".to_string()).into());
+        }
+    }
+
     print_separator(variant.step_title());
     let run_type = ctx.run_type();
 
@@ -197,7 +214,10 @@ pub fn run_brew_formula(ctx: &ExecutionContext, variant: BrewVariant) -> Result<
 
 #[cfg(target_os = "macos")]
 pub fn run_brew_cask(ctx: &ExecutionContext, variant: BrewVariant) -> Result<()> {
-    require(variant.binary_name())?;
+    let binary_name = require(variant.binary_name())?;
+    if variant.is_path() && !BrewVariant::is_macos_custom(binary_name) {
+        return Err(SkipStep("Not a custom brew for macOS".to_string()).into());
+    }
     print_separator(format!("{} - Cask", variant.step_title()));
     let run_type = ctx.run_type();