Manager: in setup assistant, find Blender in macOS default install dir

On macOS, automatically find Blender when it is installed in the default
installation directory (`/Applications/Blender.app`)

internal/find_blender/darwin.go

@@ -0,0 +1,45 @@
+//go:build darwin
+
+package find_blender
+
+import (
+	"os"
+
+	"github.com/rs/zerolog/log"
+)
+
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+const (
+	blenderExeName = "Blender"
+	defaultPath    = "/Applications/Blender.app/Contents/MacOS/Blender"
+)
+
+// fileAssociation isn't implemented on non-Windows platforms.
+func fileAssociation() (string, error) {
+	return "", ErrNotAvailable
+}
+
+// searchDefaultPaths search any available platform-specific default locations for Blender to be in.
+// Returns the path of the blender executable, or an empty string if nothing is found.
+func searchDefaultPaths() string {
+	stat, err := os.Stat(defaultPath)
+
+	switch {
+	case os.IsNotExist(err):
+		return ""
+	case err != nil:
+		log.Warn().
+			AnErr("cause", err).
+			Str("path", defaultPath).
+			Msg("could not check default path, ignoring")
+		return ""
+	case stat.IsDir():
+		log.Warn().
+			Str("path", defaultPath).
+			Msg("expected Blender executable, but is a directory, ignoring")
+		return ""
+	}
+
+	return defaultPath
+}

internal/find_blender/find_blender.go

@@ -56,8 +56,7 @@ func CheckBlender(ctx context.Context, exename string) (CheckBlenderResult, erro
 		fullPath, err := fileAssociation()
 		switch {
 		case errors.Is(err, ErrNotAvailable):
-			// Association finder not available, act as if "blender" was given as exename.
-			return CheckBlender(ctx, "blender")
+			break
 		case err != nil:
 			// Some other error occurred, better to report it.
 			return CheckBlenderResult{}, fmt.Errorf("finding .blend file association: %w", err)
@@ -65,6 +64,17 @@ func CheckBlender(ctx context.Context, exename string) (CheckBlenderResult, erro
 			// The full path was found, report the Blender version.
 			return getResultWithVersion(ctx, exename, fullPath, api.BlenderPathSourceFileAssociation)
 		}
+
+		// Try some platform-specific default directories.
+		fullPath = searchDefaultPaths()
+		if fullPath != "" {
+			result, err := CheckBlender(ctx, fullPath)
+			result.Source = api.BlenderPathSourceSystemLocation
+			return result, err
+		}
+
+		// Association finder not available, act as if "blender" was given as exename.
+		return CheckBlender(ctx, "blender")
 	}
 
 	if crosspath.Dir(exename) != "." {
@@ -77,6 +87,7 @@ func CheckBlender(ctx context.Context, exename string) (CheckBlenderResult, erro
 	if err != nil {
 		return CheckBlenderResult{}, err
 	}
+
 	return getResultWithVersion(ctx, exename, fullPath, api.BlenderPathSourcePathEnvvar)
 }
 

internal/find_blender/nonwindows.go

@@ -1,4 +1,4 @@
-//go:build !windows
+//go:build !windows && !darwin
 
 package find_blender
 
@@ -6,6 +6,12 @@ package find_blender
 
 const blenderExeName = "blender"
 
+// searchDefaultPaths search any available platform-specific default locations for Blender to be in.
+// Returns the path of the blender executable, or an empty string if nothing is found.
+func searchDefaultPaths() string {
+	return ""
+}
+
 // fileAssociation isn't implemented on non-Windows platforms.
 func fileAssociation() (string, error) {
 	return "", ErrNotAvailable

internal/find_blender/windows.go

@@ -16,6 +16,12 @@ import (
 
 const blenderExeName = "blender.exe"
 
+// searchDefaultPaths search any available platform-specific default locations for Blender to be in.
+// Returns the path of the blender executable, or an empty string if nothing is found.
+func searchDefaultPaths() string {
+	return ""
+}
+
 // fileAssociation returns the full path of `blender.exe` associated with ".blend" files.
 func fileAssociation() (string, error) {
 	exe, err := getFileAssociation(".blend")

internal/manager/api_impl/meta.go

@@ -361,7 +361,9 @@ func checkSetupAssistantConfig(config api.SetupAssistantConfig) error {
 			return ErrSetupConfigEmptyPath
 		}
 
-	case api.BlenderPathSourceInputPath, api.BlenderPathSourcePathEnvvar:
+	case api.BlenderPathSourceInputPath,
+		api.BlenderPathSourcePathEnvvar,
+		api.BlenderPathSourceSystemLocation:
 		if config.BlenderExecutable.Path == "" ||
 			config.BlenderExecutable.Input == "" {
 			return ErrSetupConfigEmptyPathOrInput

web/app/src/views/SetupAssistantView.vue

@@ -163,6 +163,30 @@
             </div>
           </label>
 
+          <label v-if="autoFoundBlenderSystemLocation" for="blender-default_location">
+            <div>
+              <input
+                v-model="selectedBlender"
+                :value="autoFoundBlenderSystemLocation"
+                id="blender-default_location"
+                name="blender"
+                type="radio" />
+              {{ sourceLabels[autoFoundBlenderSystemLocation.source] }}
+            </div>
+            <div class="setup-path-command">
+              <span class="path">
+                {{ autoFoundBlenderSystemLocation.path }}
+              </span>
+              <span
+                aria-label="Console output when running with --version"
+                class="command-preview"
+                data-microtip-position="top"
+                role="tooltip">
+                {{ autoFoundBlenderSystemLocation.cause }}
+              </span>
+            </div>
+          </label>
+
           <label for="blender-input_path">
             <div>
               <input
@@ -230,6 +254,9 @@
               >" as found on <code>$PATH</code> (currently "<code>{{ selectedBlender.path }}</code
               >")
             </dd>
+            <dd v-if="selectedBlender.source == 'system_location'">
+              Standard on your system: "<code>{{ selectedBlender.path }}</code>"
+            </dd>
             <dd v-if="selectedBlender.source == 'input_path'">
               The command you provided: "<code>{{ selectedBlender.path }}</code
               >"
@@ -289,6 +316,7 @@ export default {
       file_association: 'Blender that runs when you double-click a .blend file:',
       path_envvar: 'Blender found on the $PATH environment:',
       input_path: 'Specify a Blender executable:',
+      system_location: 'Standard location of Blender on your system:',
       default: 'Skip, let the Workers use whatever Blender is available.',
     },
     isConfirming: false,
@@ -319,6 +347,9 @@ export default {
     autoFoundBlenderFileAssociation() {
       return this.autoFoundBlenders.find((b) => b.source === 'file_association');
     },
+    autoFoundBlenderSystemLocation() {
+      return this.autoFoundBlenders.find((b) => b.source === 'system_location');
+    },
     blenderFromInputPath() {
       return this.allBlenders.find((b) => b.source === 'input_path');
     },
@@ -340,6 +371,7 @@ export default {
     },
   },
   mounted() {
+    window.assist = this;
     this.findBlenderExePath();
 
     document.body.classList.add('is-setup-assistant');