git: push --tags support.

git.go

@@ -455,11 +455,17 @@ aside from those, there is also:
 		{
 			Name:  "push",
 			Usage: "push git changes",
-			Flags: append(defaultKeyFlags, &cli.BoolFlag{
-				Name:    "force",
-				Aliases: []string{"f"},
-				Usage:   "force push to git remotes",
-			}),
+			Flags: append(defaultKeyFlags,
+				&cli.BoolFlag{
+					Name:    "force",
+					Aliases: []string{"f"},
+					Usage:   "force push to git remotes",
+				},
+				&cli.BoolFlag{
+					Name:  "tags",
+					Usage: "push all refs under refs/tags",
+				},
+			),
 			Action: func(ctx context.Context, c *cli.Command) error {
 				// setup signer
 				kr, _, err := gatherKeyerFromArguments(ctx, c)
@@ -526,6 +532,37 @@ aside from those, there is also:
 					log("- setting HEAD to branch %s\n", color.CyanString(remoteBranch))
 				}
 
+				// add all refs/tags
+				output, err := exec.Command("git", "show-ref", "--tags").Output()
+				if err != nil {
+					return fmt.Errorf("failed to get local tags: %s", err)
+				} else {
+					lines := strings.Split(strings.TrimSpace(string(output)), "\n")
+					for _, line := range lines {
+						line = strings.TrimSpace(line)
+						if line == "" {
+							continue
+						}
+						parts := strings.Fields(line)
+						if len(parts) != 2 {
+							continue
+						}
+						commitHash := parts[0]
+						ref := parts[1]
+
+						tagName := strings.TrimPrefix(ref, "refs/tags/")
+
+						if !c.Bool("force") {
+							// if --force is not passed then we can't overwrite tags
+							if existingHash, exists := state.Tags[tagName]; exists && existingHash != commitHash {
+								return fmt.Errorf("tag %s that is already published pointing to %s, call with --force to overwrite", tagName, existingHash)
+							}
+						}
+						state.Tags[tagName] = commitHash
+						log("- setting tag %s to commit %s\n", color.CyanString(tagName), color.CyanString(commitHash))
+					}
+				}
+
 				// create and sign the new state event
 				newStateEvent := state.ToEvent()
 				err = kr.SignEvent(ctx, &newStateEvent)
@@ -553,6 +590,9 @@ aside from those, there is also:
 					if c.Bool("force") {
 						pushArgs = append(pushArgs, "--force")
 					}
+					if c.Bool("tags") {
+						pushArgs = append(pushArgs, "--tags")
+					}
 					pushCmd := exec.Command("git", pushArgs...)
 					pushCmd.Stderr = os.Stderr
 					pushCmd.Stdout = os.Stdout