Move "blender finder" from Worker-specific to common location

Manager's first-time wizard will have to be able to find Blender as well.

internal/find_blender/find_blender.go

@@ -0,0 +1,14 @@
+package find_blender
+
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+import "errors"
+
+var ErrNotAvailable = errors.New("not available on this platform")
+
+// FindBlender returns the full path of a Blender executable.
+// `ErrNotAvailable` is returned if no "blender finder" is available for the current platform.
+func FindBlender() (string, error) {
+	// findBlender() is implemented in one of the platform-dependent files.
+	return findBlender()
+}

internal/find_blender/nonwindows.go

@@ -0,0 +1,10 @@
+//go:build !windows
+
+package find_blender
+
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// findBlender returns ErrNotAvailable, as the file association lookup is only available on Windows.
+func findBlender() (string, error) {
+	return "", ErrNotAvailable
+}

internal/find_blender/windows.go

@@ -1,8 +1,9 @@
 //go:build windows
 
-// SPDX-License-Identifier: GPL-3.0-or-later
 package find_blender
 
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import (
 	"errors"
 	"fmt"
@@ -13,8 +14,8 @@ import (
 	"unsafe"
 )
 
-// FindBlender returns the full path of `blender.exe` associated with ".blend" files.
-func FindBlender() (string, error) {
+// findBlender returns the full path of `blender.exe` associated with ".blend" files.
+func findBlender() (string, error) {
 	exe, err := fileAssociation(".blend")
 	if err != nil {
 		return "", err

internal/find_blender/windows_test.go

@@ -1,8 +1,9 @@
 //go:build windows
 
-// SPDX-License-Identifier: GPL-3.0-or-later
 package find_blender
 
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 import (
 	"flag"
 	"testing"
@@ -15,7 +16,7 @@ var withBlender = flag.Bool("withBlender", false, "run test that requires Blende
 // TestFindBlender is a "weak" test, which actually accepts both happy and unhappy flows.
 // It would be too fragile to always require a file association to be set up with Blender.
 func TestFindBlender(t *testing.T) {
-	exe, err := FindBlender()
+	exe, err := findBlender()
 	if err != nil {
 		assert.Empty(t, exe)
 

internal/worker/command_blender.go

@@ -16,7 +16,7 @@ import (
 	"github.com/google/shlex"
 	"github.com/rs/zerolog"
 
-	"git.blender.org/flamenco/internal/worker/find_blender"
+	"git.blender.org/flamenco/internal/find_blender"
 	"git.blender.org/flamenco/pkg/api"
 )
 

internal/worker/find_blender/nonwindows.go

@@ -1,11 +0,0 @@
-//go:build !windows
-
-// SPDX-License-Identifier: GPL-3.0-or-later
-package find_blender
-
-import "errors"
-
-// FindBlender returns an error, as the file association lookup is only available on Windows.
-func FindBlender() (string, error) {
-	return "", errors.New("file association lookup is only available on Windows")
-}

web/app/src/views/FirstTimeWizardView.vue

@@ -27,6 +27,10 @@
         {{ sharedStorageCheckResult.cause }}
       </p>
     </section>
+
+    <section>
+      <h2>Which Blender?</h2>
+    </section>
   </div>
 
   <footer class="app-footer">