Parse within subcommands

1 files changed, 18 insertions, 1 deletions

diff --git a/snap/parsing.go b/snap/parsing.go
index a848c33..e878077 100644
--- a/snap/parsing.go
+++ b/snap/parsing.go
@@ -78,7 +78,7 @@ func ToRelative(snapish string) * Relative {
 		return ref;
 	}
 
-	if ref := parseRelativeSyntax(snapish, "-"); ref != nil {
+	if ref := parseRelativeSyntax(snapish, "~"); ref != nil {
 		ref.offset = -ref.offset;
 		return ref;
 	}
@@ -86,4 +86,21 @@ func ToRelative(snapish string) * Relative {
 	return &Relative{
 		snapshot: snapish,
 	};
+}
+
+// FROM, TO
+func ParseDiff(snapdiff string) (fromRel, toRel *Relative) {
+	snapishes := strings.Split(snapdiff, "..")
+
+	if(len(snapishes) > 2) {
+		die.Fatal("Cannot diff more than two snapshots");
+	}
+
+	fromRel = ToRelative(snapishes[0])
+	toRel = &Relative{}
+	if(len(snapishes) == 2) {	
+		toRel = ToRelative(snapishes[1])
+	}
+
+	return
 }
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