Change TreeID to be of type string instead of int64

When printing the TreeID with rekor-cli loginfo, if the output is parsed through jq
then the TreeID gets rounded down as an int because it is bigger than JSON allows Numbers to be.

This is how jq works and is mentioned in the FAQ: https://github.com/stedolan/jq/wiki/FAQ#numbers

Switching this to a string will preserve the actual Tree ID.

Signed-off-by: Priya Wadhwa <priya@chainguard.dev>

cmd/rekor-cli/app/log_info.go

@@ -43,7 +43,7 @@ type logInfoCmdOutput struct {
 	TreeSize       int64
 	RootHash       string
 	TimestampNanos uint64
-	TreeID         int64
+	TreeID         string
 }
 
 func (l *logInfoCmdOutput) String() string {
@@ -53,7 +53,7 @@ func (l *logInfoCmdOutput) String() string {
 Tree Size: %v
 Root Hash: %s
 Timestamp: %s
-TreeID:    %v
+TreeID:    %s
 `, l.TreeSize, l.RootHash, ts, l.TreeID)
 }
 

openapi.yaml

@@ -582,7 +582,7 @@ definitions:
         format: signedCheckpoint
         description: The current signed tree head
       treeID:
-        type: integer
+        type: string
         description: The current treeID
     required:
       - rootHash

pkg/api/tlog.go

@@ -76,12 +76,16 @@ func GetLogInfoHandler(params tlog.GetLogInfoParams) middleware.Responder {
 		RootHash:       &hashString,
 		TreeSize:       &treeSize,
 		SignedTreeHead: &scString,
-		TreeID:         &tc.logID,
+		TreeID:         stringPointer(fmt.Sprintf("%d", tc.logID)),
 	}
 
 	return tlog.NewGetLogInfoOK().WithPayload(&logInfo)
 }
 
+func stringPointer(s string) *string {
+	return &s
+}
+
 // GetLogProofHandler returns information required to compute a consistency proof between two snapshots of log
 func GetLogProofHandler(params tlog.GetLogProofParams) middleware.Responder {
 	if *params.FirstSize > params.LastSize {