pkg/csource: speed up tests

Tests run for too long.
1. Check only 1 arch per OS in short mode.
2. Dedup options. Turns out we generated 2x duplicates in allOptionsSingle.

2 files changed, 20 insertions, 3 deletions

diff --git a/pkg/csource/csource_test.go b/pkg/csource/csource_test.go
index 61b6bcf31..a5b12babf 100644
--- a/pkg/csource/csource_test.go
+++ b/pkg/csource/csource_test.go
@@ -32,10 +32,13 @@ func TestGenerate(t *testing.T) {
 			continue
 		}
 		t.Run(target.OS+"/"+target.Arch, func(t *testing.T) {
+			full := !checked[target.OS]
+			if !full && testing.Short() {
+				return
+			}
 			if err := sysTarget.BrokenCompiler; err != "" {
 				t.Skipf("target compiler is broken: %v", err)
 			}
-			full := !checked[target.OS]
 			checked[target.OS] = true
 			t.Parallel()
 			testTarget(t, target, full)
diff --git a/pkg/csource/options_test.go b/pkg/csource/options_test.go
index d4e1832e7..e1457ea73 100644
--- a/pkg/csource/options_test.go
+++ b/pkg/csource/options_test.go
@@ -148,7 +148,7 @@ func allOptionsSingle(OS string) []Options {
 		}
 		opts = append(opts, enumerateField(OS, opt, i)...)
 	}
-	return opts
+	return dedup(opts)
 }
 
 func allOptionsPermutations(OS string) []Options {
@@ -161,7 +161,21 @@ func allOptionsPermutations(OS string) []Options {
 		}
 		opts = newOpts
 	}
-	return opts
+	return dedup(opts)
+}
+
+func dedup(opts []Options) []Options {
+	pos := 0
+	dedup := make(map[Options]bool)
+	for _, opt := range opts {
+		if dedup[opt] {
+			continue
+		}
+		dedup[opt] = true
+		opts[pos] = opt
+		pos++
+	}
+	return opts[:pos]
 }
 
 func enumerateField(OS string, opt Options, field int) []Options {