Worker: also log found Blender at startup

Similar to the logging of the found FFmpeg, log the version of Blender at
Worker startup.

cmd/flamenco-worker/find_exes.go

@@ -1,11 +1,14 @@
 package main
 
 import (
+	"context"
 	"errors"
 	"io/fs"
+	"time"
 
 	"github.com/rs/zerolog/log"
 
+	"git.blender.org/flamenco/internal/find_blender"
 	"git.blender.org/flamenco/internal/find_ffmpeg"
 )
 
@@ -21,3 +24,22 @@ func findFFmpeg() {
 		log.Info().Str("path", result.Path).Str("version", result.Version).Msg("FFmpeg found on this system")
 	}
 }
+
+// findBlender tries to find Blender, in order to show its version (if found) or a message (if not).
+func findBlender() {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	result, err := find_blender.Find(ctx)
+	switch {
+	case errors.Is(err, fs.ErrNotExist):
+		log.Warn().Msg("Blender could not be found, Flamenco Manager will have to supply a full path")
+	case err != nil:
+		log.Warn().Err(err).Msg("there was an unexpected error finding Blender on this system, Flamenco Manager will have to supply a full path")
+	default:
+		log.Info().
+			Str("path", result.FoundLocation).
+			Str("version", result.BlenderVersion).
+			Msg("Blender found on this system, it will be used unless Flamenco Manager specifies a path to a different Blender")
+	}
+}

cmd/flamenco-worker/main.go

@@ -95,6 +95,7 @@ func main() {
 		configWrangler.SetManagerURL(url)
 	}
 
+	findBlender()
 	findFFmpeg()
 
 	// Give the auto-discovery some time to find a Manager.