feature: tag from ci fetches commits from remote api

src/git_flow/remote/base.py

@@ -1,9 +1,10 @@
 from abc import ABC, abstractmethod
 
 import giturlparse
+import requests
 
 from git_flow import SUPPORTED_REMOTE_URL_SCHEMAS, GitFlowError
-from git_flow.git import Git
+from git_flow.git import Commit, Git
 
 
 class RemoteAPI(ABC):
@@ -65,6 +66,12 @@ class RemoteAPI(ABC):
     def create_tag(self, tag: str, commit: str) -> str:
         pass
 
+    @abstractmethod
+    def get_merge_commits(self, merge_commit: str) -> list[Commit]:
+        """Busca el PR que generó el merge commit y devuelve sus commits (del más nuevo al más
+        viejo), sin depender del historial local."""
+        pass
+
     @abstractmethod
     def get_endpoint(self, resource: str) -> str:
         pass
@@ -75,3 +82,25 @@ class RemoteAPI(ABC):
             "Content-Type": "application/json",
             "Authorization": "Bearer " + self.token,
         }
+
+    def get_json(self, url: str, params: dict | None = None):
+        response = requests.get(url, headers=self.get_headers(), params=params)
+
+        if not response.ok:
+            raise GitFlowError(f"Ocurrió un error al consultar {url}: {response.text}")
+
+        return response
+
+    def get_all_pages(self, url: str, page_size: int = 50) -> list:
+        """Recorre un endpoint paginado por número de página (page / per_page)."""
+        items: list = []
+        page = 1
+
+        while True:
+            batch = self.get_json(url, {"page": page, "per_page": page_size}).json()
+            items += batch
+
+            if len(batch) < page_size:
+                return items
+
+            page += 1

src/git_flow/remote/bitbucket.py

@@ -1,5 +1,8 @@
+import re
+
 import requests
 from git_flow import GitFlowError
+from git_flow.git import Commit
 from git_flow.remote.base import RemoteAPI
 
 
@@ -44,5 +47,35 @@ class BitbucketRemoteAPI(RemoteAPI):
         else:
             raise GitFlowError("Ocurrió un error al crear el tag: " + response.text)
 
+    def get_merge_commits(self, merge_commit: str) -> list[Commit]:
+        prs = self.get_json(self.get_endpoint(f"commit/{merge_commit}/pullrequests")).json()
+        pr = next((p for p in prs["values"] if p["state"] == "MERGED"), None)
+
+        if not pr:
+            raise GitFlowError(f"No se encontró un PR para el commit {merge_commit}")
+
+        commits: list[Commit] = []
+        url: str | None = self.get_endpoint(f"pullrequests/{pr['id']}/commits")
+
+        # Bitbucket pagina siguiendo el link "next", y devuelve del más nuevo al más viejo
+        while url:
+            page = self.get_json(url).json()
+
+            for c in page["values"]:
+                raw = c["author"].get("raw", "")
+                match = re.search(r"<(.+?)>", raw)
+                commits.append(
+                    Commit(
+                        c["hash"][:7],
+                        c["message"].splitlines()[0],
+                        match.group(1) if match else raw,
+                        len(c["parents"]) > 1,
+                    )
+                )
+
+            url = page.get("next")
+
+        return commits
+
     def get_endpoint(self, resource: str) -> str:
         return f"{BitbucketRemoteAPI.API_ENDPOINT}/{self.repository}/{resource}"

src/git_flow/remote/gitea.py

@@ -1,5 +1,6 @@
 import requests
 from git_flow import GitFlowError
+from git_flow.git import Commit
 from git_flow.remote.base import RemoteAPI
 
 
@@ -44,6 +45,35 @@ class GiteaRemoteAPI(RemoteAPI):
         else:
             raise GitFlowError("Ocurrió un error al crear el tag: " + response.text)
 
+    def get_merge_commits(self, merge_commit: str) -> list[Commit]:
+        pr = self.get_json(self.get_endpoint(f"/commits/{merge_commit}/pull")).json()
+        url = self.get_endpoint(f"/pulls/{pr['number']}/commits")
+        items: list = []
+        page = 1
+
+        # Gitea pagina con page / limit
+        while True:
+            batch = self.get_json(
+                url, {"page": page, "limit": 50, "files": "false", "verification": "false"}
+            ).json()
+            items += batch
+
+            if len(batch) < 50:
+                break
+
+            page += 1
+
+        # La API los devuelve del más viejo al más nuevo
+        return [
+            Commit(
+                c["sha"][:7],
+                c["commit"]["message"].splitlines()[0],
+                c["commit"]["author"]["email"],
+                len(c["parents"]) > 1,
+            )
+            for c in reversed(items)
+        ]
+
     def get_endpoint(self, resource: str) -> str:
         return f"{self.base_url}/api/v1/repos/{self.repository}{resource}"
     

src/git_flow/remote/github.py

@@ -1,5 +1,6 @@
 import requests
 from git_flow import GitFlowError
+from git_flow.git import Commit
 from git_flow.remote.base import RemoteAPI
 
 
@@ -42,5 +43,25 @@ class GithubRemoteAPI(RemoteAPI):
         else:
             raise GitFlowError("Ocurrió un error al crear el tag: " + response.text)
 
+    def get_merge_commits(self, merge_commit: str) -> list[Commit]:
+        prs = self.get_json(self.get_endpoint(f"/commits/{merge_commit}/pulls")).json()
+        pr = next((p for p in prs if p.get("merge_commit_sha") == merge_commit), None)
+
+        if not pr:
+            raise GitFlowError(f"No se encontró un PR para el commit {merge_commit}")
+
+        items = self.get_all_pages(self.get_endpoint(f"/pulls/{pr['number']}/commits"), 100)
+
+        # La API los devuelve del más viejo al más nuevo
+        return [
+            Commit(
+                c["sha"][:7],
+                c["commit"]["message"].splitlines()[0],
+                c["commit"]["author"]["email"],
+                len(c["parents"]) > 1,
+            )
+            for c in reversed(items)
+        ]
+
     def get_endpoint(self, resource: str) -> str:
         return f"{GithubRemoteAPI.API_ENDPOINT}/{self.repository}{resource}"

src/git_flow/remote/gitlab.py

@@ -2,6 +2,7 @@ from urllib.parse import quote
 
 import requests
 from git_flow import GitFlowError
+from git_flow.git import Commit
 from git_flow.remote.base import RemoteAPI
 
 
@@ -47,6 +48,28 @@ class GitlabRemoteAPI(RemoteAPI):
         else:
             raise GitFlowError("Ocurrió un error al crear el tag para repositorio " + quote(self.repository, safe="") + ": " + response.text)
 
+    def get_merge_commits(self, merge_commit: str) -> list[Commit]:
+        mrs = self.get_json(
+            self.get_endpoint(f"/repository/commits/{merge_commit}/merge_requests")
+        ).json()
+        mr = next((m for m in mrs if m.get("merge_commit_sha") == merge_commit), None)
+
+        if not mr:
+            raise GitFlowError(f"No se encontró un MR para el commit {merge_commit}")
+
+        items = self.get_all_pages(self.get_endpoint(f"/merge_requests/{mr['iid']}/commits"), 100)
+
+        # GitLab ya los devuelve del más nuevo al más viejo
+        return [
+            Commit(
+                c["short_id"][:7],
+                c["title"],
+                c["author_email"],
+                len(c["parent_ids"]) > 1,
+            )
+            for c in items
+        ]
+
     def get_endpoint(self, resource: str) -> str:
         project_id = quote(self.repository, safe="")
         return f"{self.base_url}/api/v4/projects/{project_id}{resource}"