feat(git): allow cherry-pick to suppress tag altogether

cypress/integration/rendering/gitGraph.spec.js

@@ -201,6 +201,27 @@ describe('Git Graph diagram', () => {
       {}
     );
   });
+  it('11: should render a gitgraph with cherry pick commit with no tag', () => {
+    imgSnapshotTest(
+      `
+    gitGraph
+       commit id: "ZERO"
+       branch develop
+       commit id:"A"
+       checkout main
+       commit id:"ONE"
+       checkout develop
+       commit id:"B"
+       checkout main
+       commit id:"TWO"
+       cherry-pick id:"A" tag: ""
+       commit id:"THREE"
+       checkout develop
+       commit id:"C"
+      `,
+      {}
+    );
+  });
   it('11: should render a simple gitgraph with two cherry pick commit', () => {
     imgSnapshotTest(
       `

docs/gitgraph.md

@@ -429,6 +429,8 @@ By default, the cherry-picked commit from commit with id `A` will be labeled `ch
        commit id:"C"
 ```
 
+To suppress the tag entirely, use `tag:""` (empty string).
+
 ## Gitgraph specific configuration options
 
 In Mermaid, you have the option to configure the gitgraph diagram. You can configure the following options:

src/diagrams/git/gitGraphAst.js

@@ -262,6 +262,10 @@ export const cherryPick = function (sourceId, targetId, tag) {
   log.debug('Entering cherryPick:', sourceId, targetId, tag);
   sourceId = common.sanitizeText(sourceId, configApi.getConfig());
   targetId = common.sanitizeText(targetId, configApi.getConfig());
+
+  if (tag === 'cherry-pick:<id>') {
+    tag = 'cherry-pick:' + sourceCommit.id;
+  }
   tag = common.sanitizeText(tag, configApi.getConfig());
 
   if (!sourceId || typeof commits[sourceId] === 'undefined') {
@@ -330,7 +334,7 @@ export const cherryPick = function (sourceId, targetId, tag) {
       parents: [head == null ? null : head.id, sourceCommit.id],
       branch: curBranch,
       type: commitType.CHERRY_PICK,
-      tag: tag ? tag : 'cherry-pick:' + sourceCommit.id,
+      tag: tag,
     };
     head = commit;
     commits[commit.id] = commit;

src/diagrams/git/parser/gitGraph.jison

@@ -117,7 +117,7 @@ branchStatement
     ;
 
 cherryPickStatement
-    : CHERRY_PICK COMMIT_ID STR {yy.cherryPick($3, '', '')}
+    : CHERRY_PICK COMMIT_ID STR {yy.cherryPick($3, '', 'cherry-pick:<id>')}
     | CHERRY_PICK COMMIT_ID STR COMMIT_TAG STR {yy.cherryPick($3, '', $5)}
     | CHERRY_PICK COMMIT_TAG STR COMMIT_ID STR {yy.cherryPick($5, '', $3)}
     ;