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go/src/infra/libs/git/intern.go

Index: go/src/infra/libs/git/intern.go
diff --git a/go/src/infra/libs/git/intern.go b/go/src/infra/libs/git/intern.go
new file mode 100644
index 0000000000000000000000000000000000000000..66790c392479044686bedc2c66688609a081baf2
--- /dev/null
+++ b/go/src/infra/libs/git/intern.go
@@ -0,0 +1,43 @@
+package git
+
+import "fmt"
+import "strings"
+
+// InternResult contians either the ID of the intern'd object, or an error.

[M-A Ruel, 2014/10/18 00:47:05]

contains

[iannucci, 2014/10/20 21:11:57]

Done (removed this struct entirely)

+type InternResult struct {
+	Err error
+	ID  ObjectID
+}
+
+// Intern takes an InternableObject (Blob, Tree, Commit), and writes it into
+// the on-disk Repo.
+func (r *Repo) Intern(obj InternableObject) InternResult {
+	gotData := false
+	var data string
+	if !obj.Complete() {
+		gotData = true
+		data = obj.RawString()
+	}
+
+	if obj.ID() != NoID && r.HasObjectID(obj.ID()) {
+		return InternResult{ID: obj.ID()}
+	}
+
+	switch obj.Type() {
+	case "commit", "tree", "blob":
+	default:
+		return InternResult{Err: fmt.Errorf(
+			"git.Intern: Unrecognized type %s", obj.Type())}
+	}
+	if !gotData {
+		data = obj.RawString()
+	}
+	cmd := []string{"hash-object", "-t", obj.Type(), "-w", "--stdin"}
+	out, ok := r.RunInput(data, cmd...)
+	if !ok {
+		return InternResult{
+			Err: fmt.Errorf("error running %s <- %s: not ok", cmd, data),
+		}
+	}
+	return InternResult{ID: MakeObjectID(strings.TrimSpace(string(out)))}
+}