cosmetic: switch instead of if-else

Bug: N/A
Test: m bp2build
Change-Id: Idf37af869f814a0a75957808f3f33200ff9800c0
diff --git a/bp2build/build_conversion.go b/bp2build/build_conversion.go
index 6598b6f..36c3a48 100644
--- a/bp2build/build_conversion.go
+++ b/bp2build/build_conversion.go
@@ -284,9 +284,10 @@
 				if unconvertedDeps := aModule.GetUnconvertedBp2buildDeps(); len(unconvertedDeps) > 0 {
 					msg := fmt.Sprintf("%s %s:%s depends on unconverted modules: %s",
 						moduleType, bpCtx.ModuleDir(m), m.Name(), strings.Join(unconvertedDeps, ", "))
-					if ctx.unconvertedDepMode == warnUnconvertedDeps {
+					switch ctx.unconvertedDepMode {
+					case warnUnconvertedDeps:
 						metrics.moduleWithUnconvertedDepsMsgs = append(metrics.moduleWithUnconvertedDepsMsgs, msg)
-					} else if ctx.unconvertedDepMode == errorModulesUnconvertedDeps {
+					case errorModulesUnconvertedDeps:
 						errs = append(errs, fmt.Errorf(msg))
 						return
 					}
@@ -294,9 +295,10 @@
 				if unconvertedDeps := aModule.GetMissingBp2buildDeps(); len(unconvertedDeps) > 0 {
 					msg := fmt.Sprintf("%s %s:%s depends on missing modules: %s",
 						moduleType, bpCtx.ModuleDir(m), m.Name(), strings.Join(unconvertedDeps, ", "))
-					if ctx.unconvertedDepMode == warnUnconvertedDeps {
+					switch ctx.unconvertedDepMode {
+					case warnUnconvertedDeps:
 						metrics.moduleWithMissingDepsMsgs = append(metrics.moduleWithMissingDepsMsgs, msg)
-					} else if ctx.unconvertedDepMode == errorModulesUnconvertedDeps {
+					case errorModulesUnconvertedDeps:
 						errs = append(errs, fmt.Errorf(msg))
 						return
 					}
@@ -349,7 +351,7 @@
 		// TODO(b/198619163): We should change this to export_files(glob(["**/*"])) instead, but doing that causes these errors:
 		// "Error in exports_files: generated label '//external/avb:avbtool' conflicts with existing py_binary rule"
 		// So we need to solve all the "target ... is both a rule and a file" warnings first.
-		for dir, _ := range dirs {
+		for dir := range dirs {
 			buildFileToTargets[dir] = append(buildFileToTargets[dir], BazelTarget{
 				name:      "bp2build_all_srcs",
 				content:   `filegroup(name = "bp2build_all_srcs", srcs = glob(["**/*"]))`,