minor dead code: unused format string

Using URL base64 encoding
(without padding, i.e. with trailing '=' or '==')
hash string width is 256/6 = 43 characters.

file size virtually unchanged,
  out/soong/build.ninja:  7,188,669,041 => 7,186,999,370 ie 1.6M

Bug: N/A
Test: manually verified (e.g. ran `m nothing` successfully)
Change-Id: I166d613e1fd857555da9611d420d6691806571c7

android/bazel_handler.go

@@ -878,7 +878,7 @@ func (c *bazelSingleton) GenerateBuildActions(ctx SingletonContext) {
 		}
 
 		// The actual Bazel action.
-		cmd.Text(" " + buildStatement.Command)
+		cmd.Text(buildStatement.Command)
 
 		for _, outputPath := range buildStatement.OutputPaths {
 			cmd.ImplicitOutput(PathForBazelOut(ctx, outputPath))

bazel/aquery.go

@@ -16,6 +16,7 @@ package bazel
 
 import (
 	"crypto/sha256"
+	"encoding/base64"
 	"encoding/json"
 	"fmt"
 	"path/filepath"
@@ -295,7 +296,7 @@ func (a *aqueryArtifactHandler) artifactPathsFromDepsetHash(depsetHash string) (
 		a.depsetHashToArtifactPathsCache[depsetHash] = result
 		return result, nil
 	} else {
-		return nil, fmt.Errorf("undefined input depset hash %d", depsetHash)
+		return nil, fmt.Errorf("undefined input depset hash %s", depsetHash)
 	}
 }
 
@@ -390,8 +391,8 @@ func depsetContentHash(directPaths []string, transitiveDepsetHashes []string) st
 	h := sha256.New()
 	// Use newline as delimiter, as paths cannot contain newline.
 	h.Write([]byte(strings.Join(directPaths, "\n")))
-	h.Write([]byte(strings.Join(transitiveDepsetHashes, "\n")))
-	fullHash := fmt.Sprintf("%016x", h.Sum(nil))
+	h.Write([]byte(strings.Join(transitiveDepsetHashes, "")))
+	fullHash := base64.RawURLEncoding.EncodeToString(h.Sum(nil))
 	return fullHash
 }
 

bazel/aquery_test.go

@@ -847,8 +847,8 @@ func TestMiddlemenAction(t *testing.T) {
 	}
 
 	expectedDepsetFiles := [][]string{
-		[]string{"middleinput_one", "middleinput_two"},
-		[]string{"middleinput_one", "middleinput_two", "maininput_one", "maininput_two"},
+		{"middleinput_one", "middleinput_two", "maininput_one", "maininput_two"},
+		{"middleinput_one", "middleinput_two"},
 	}
 	assertFlattenedDepsets(t, actualDepsets, expectedDepsetFiles)
 
@@ -897,7 +897,7 @@ func flattenDepset(depsetHashToFlatten string, allDepsets map[string]AqueryDepse
 func assertFlattenedDepsets(t *testing.T, actualDepsets []AqueryDepset, expectedDepsetFiles [][]string) {
 	t.Helper()
 	if len(actualDepsets) != len(expectedDepsetFiles) {
-		t.Errorf("Expected %d depsets, but got %d depsets", expectedDepsetFiles, actualDepsets)
+		t.Errorf("Expected %s depsets, but got %s depsets", expectedDepsetFiles, actualDepsets)
 	}
 	for i, actualDepset := range actualDepsets {
 		actualFlattenedInputs := flattenDepsets([]string{actualDepset.ContentHash}, actualDepsets)