Migrate label-based releases to release pipelines

scripts/migrate-label-based-releases-to-release-pipelines/README.md

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+# Migrate label-based release pipeline to Linear releases
+
+This script helps teams that previously modeled release pipelines with **labels** (e.g. a parent label "Releases" with sub-labels per release) migrate to Linear’s native **Releases & release pipelines** feature.
+
+## What it does
+
+- For each **sub-label** of the parent label: creates a **release** in your pipeline (same name as the label), sets **version** to that name, and adds all issues with that label to the release.
+- **Idempotent:** if a release with the same version already exists in the pipeline (or same name if version is empty), the script reuses it instead of creating a duplicate. Safe to re-run after a partial failure — per-issue errors are collected and reported at the end rather than stopping the migration mid-run.
+- Supports optional **release stage ID** (scheduled pipelines only).
+
+## Prerequisites
+
+- Python 3 with `requests` installed: `pip install requests`
+- A **release pipeline** already created in Linear (the script only creates releases inside an existing pipeline).
+- A **parent label** whose sub-labels represent releases; each sub-label’s name becomes a release name (and version).
+
+## Setup
+
+1. **Get your UUIDs:**
+   - **LABEL_ID** — Open the **label group with O+L** (the label group that contains your release-named sub-labels) in Linear, then **Cmd+K** (Mac) or **Ctrl+K** (Windows/Linux) → "Copy model UUID".
+   - **RELEASE_PIPELINE_ID** — Query it in the [Linear API explorer](https://studio.apollographql.com/public/Linear-API/variant/current/explorer?explorerURLState=N4IgJg9gxgrgtgUwHYBcQC4QEcYIE4CeABAA4CWJCANmUggJJgDORwAOkkUXtQgIZMEABQrVaCFu05ciSCGAmsOMmUj6JlKopq4BfTfqS6QuoA).
+2. At the top of `migrate_label_pipeline_to_releases.py`, paste:
+   - **API_KEY** – Linear personal API key starting with `lin_api_` (or set `LINEAR_API_KEY` env var). **Do not use a pipeline access key.** Create one in Linear: [Settings → API](https://linear.app/settings/account/security).
+   - **LABEL_ID** – ID of the label group whose sublabels should become releases in the given pipeline.
+   - **RELEASE_PIPELINE_ID** – pipeline where releases will be created.
+   - **RELEASE_STAGE_ID** (optional, scheduled pipelines only) – sets the stage of new releases. In the [Linear API explorer](https://studio.apollographql.com/public/Linear-API/variant/current/explorer?explorerURLState=N4IgJg9gxgrgtgUwHYBcQC4QEcYIE4CeABAA4CWJCANmUggMooCGA5ggM4AUAJHtQk3YIAChWq0EASTDoijPLRYBCAJTAAOkiJE%2BVAUNGUadTmRlFe-QSLHGpYFUQ1btRdszbsnm166QQwDm8XX20kJkQfUO0zKN8AXziiRJcU%2BJB4oA), query your release pipeline by ID and read the pipeline's stages to get stage IDs.
+3. Run with `--dry-run` first to see what would be created:
+   ```bash
+   python3 migrate_label_pipeline_to_releases.py --dry-run
+   ```
+4. Run for real:
+   ```bash
+   python3 migrate_label_pipeline_to_releases.py
+   ```
+
+## CLI options
+
+| Option | Env var | Description |
+|--------|---------|-------------|
+| `--api-key` | `LINEAR_API_KEY` | Linear API key |
+| `--label-id` | `LABEL_ID` | Label ID (of the label group whose sublabels become releases) |
+| `--pipeline-id` | `RELEASE_PIPELINE_ID` | Release pipeline UUID |
+| `--stage-id` | `RELEASE_STAGE_ID` | Optional stage ID for new releases (scheduled pipelines only) |
+| `--dry-run` | — | List sub-labels and issue counts only; no creates |
+
+## Notes
+
+- The script does **not** delete labels; you can remove the label group in Linear after migration if you want.
+- Re-running is safe: existing releases (matched by version, or by name if version is empty) are reused; only missing ones are created.
+- New releases get **version** set to the same value as the name.
+- If the migration finishes with errors, the script prints a summary of failed issue associations and exits with a non-zero code. Fix the issues and re-run — already-linked issues will be skipped automatically.
+
+## Troubleshooting
+
+- If you get an error: confirm your **API key** is valid (Linear Settings → API).
+- Confirm **LABEL_ID** is the **label group (parent)** UUID, not a sub-label.
+- Confirm the **release pipeline** exists and you have access.

scripts/migrate-label-based-releases-to-release-pipelines/migrate_to_release_pipeline.py

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+#!/usr/bin/env python3
+"""
+Migrate label-based release pipeline to Linear's native releases.
+
+For each sub-label of the parent label: create a release (same name) in the pipeline,
+then add all issues with that label to the release.
+"""
+
+# =============================================================================
+# PASTE YOUR VALUES HERE (or use env vars / --flags)
+# UUIDs: Cmd+K (Mac) or Ctrl+K (Windows/Linux) → "Copy model UUID"
+# =============================================================================
+
+API_KEY = ""
+# ID of the label group whose sublabels should become releases in the given pipeline.
+LABEL_ID = ""
+RELEASE_PIPELINE_ID = ""
+# This is supported only for scheduled pipelines.
+RELEASE_STAGE_ID = ""
+
+# =============================================================================
+
+import argparse
+import os
+import sys
+import time
+from typing import Optional
+
+import requests
+
+LINEAR_GRAPHQL = "https://api.linear.app/graphql"
+
+
+def graphql(api_key: str, query: str, variables: dict | None = None) -> dict:
+    payload = {"query": query}
+    if variables:
+        payload["variables"] = variables
+    while True:
+        r = requests.post(
+            LINEAR_GRAPHQL,
+            json=payload,
+            headers={"Authorization": api_key, "Content-Type": "application/json"},
+            timeout=30,
+        )
+        r.raise_for_status()
+        data = r.json()
+        if "errors" in data:
+            if any(e.get("extensions", {}).get("code") == "RATELIMITED" for e in data["errors"]):
+                reset_ms = r.headers.get("X-RateLimit-Requests-Reset")
+                wait = max(0, int(reset_ms) / 1000 - time.time()) + 1 if reset_ms else 60
+                print(f"Rate limited. Retrying in {wait:.0f}s...")
+                time.sleep(wait)
+                continue
+            raise RuntimeError(f"GraphQL errors: {data['errors']}")
+        return data.get("data", {})
+
+
+def paginate(api_key: str, query: str, base_vars: dict, path: str) -> list:
+    """Run paginated query; path is e.g. 'issueLabels' or 'issues'."""
+    nodes, cursor = [], None
+    while True:
+        vars_ = {**base_vars, "after": cursor}
+        page = graphql(api_key, query, vars_)[path]
+        nodes.extend(page["nodes"])
+        if not page["pageInfo"]["hasNextPage"]:
+            break
+        cursor = page["pageInfo"]["endCursor"]
+    return nodes
+
+
+def get_sub_labels(api_key: str, parent_label_id: str) -> list[dict]:
+    q = """
+    query($filter: IssueLabelFilter, $first: Int!, $after: String) {
+      issueLabels(filter: $filter, first: $first, after: $after) {
+        nodes { id name }
+        pageInfo { hasNextPage endCursor }
+      }
+    }
+    """
+    return paginate(api_key, q, {"filter": {"parent": {"id": {"eq": parent_label_id}}}, "first": 100}, "issueLabels")
+
+
+def get_issues_with_label(api_key: str, label_id: str) -> list[dict]:
+    q = """
+    query($filter: IssueFilter, $first: Int!, $after: String) {
+      issues(filter: $filter, first: $first, after: $after) {
+        nodes { id }
+        pageInfo { hasNextPage endCursor }
+      }
+    }
+    """
+    return paginate(api_key, q, {"filter": {"labels": {"some": {"id": {"eq": label_id}}}}, "first": 100}, "issues")
+
+
+def get_releases_in_pipeline(api_key: str, pipeline_id: str) -> list[dict]:
+    """Return all releases in the pipeline (id, name, version)."""
+    q = """
+    query($id: String!, $first: Int!, $after: String) {
+      releasePipeline(id: $id) {
+        releases(first: $first, after: $after) {
+          nodes { id name version }
+          pageInfo { hasNextPage endCursor }
+        }
+      }
+    }
+    """
+    nodes: list[dict] = []
+    cursor: Optional[str] = None
+    while True:
+        vars_ = {"id": pipeline_id, "first": 100, "after": cursor}
+        data = graphql(api_key, q, vars_)
+        releases = data.get("releasePipeline") or {}
+        page = releases.get("releases") or {}
+        nodes.extend(page.get("nodes") or [])
+        if not page.get("pageInfo", {}).get("hasNextPage"):
+            break
+        cursor = page["pageInfo"].get("endCursor")
+    return nodes
+
+
+def create_release(
+    api_key: str,
+    pipeline_id: str,
+    name: str,
+    stage_id: Optional[str] = None,
+    version: Optional[str] = None,
+) -> dict:
+    input_: dict = {"name": name, "pipelineId": pipeline_id}
+    if stage_id:
+        input_["stageId"] = stage_id
+    if version is not None:
+        input_["version"] = version
+    data = graphql(api_key, """
+    mutation($input: ReleaseCreateInput!) {
+      releaseCreate(input: $input) { success release { id name version } }
+    }
+    """, {"input": input_})
+    if not data.get("releaseCreate", {}).get("success"):
+        raise RuntimeError(f"releaseCreate failed: {data}")
+    return data["releaseCreate"]["release"]
+
+
+def add_issue_to_release(api_key: str, issue_id: str, release_id: str) -> bool:
+    """Add an issue to a release. Returns True if newly linked, False if already linked."""
+    try:
+        data = graphql(api_key, """
+        mutation($input: IssueToReleaseCreateInput!) {
+          issueToReleaseCreate(input: $input) { success }
+        }
+        """, {"input": {"issueId": issue_id, "releaseId": release_id}})
+    except RuntimeError as e:
+        if "already" in str(e).lower():
+            return False
+        raise
+    if not data.get("issueToReleaseCreate", {}).get("success"):
+        raise RuntimeError(f"issueToReleaseCreate failed: {data}")
+    return True
+
+
+def main() -> None:
+    p = argparse.ArgumentParser()
+    p.add_argument("--api-key", default=API_KEY or os.environ.get("LINEAR_API_KEY"))
+    p.add_argument("--label-id", default=LABEL_ID or os.environ.get("LABEL_ID"))
+    p.add_argument("--pipeline-id", default=RELEASE_PIPELINE_ID or os.environ.get("RELEASE_PIPELINE_ID"))
+    p.add_argument("--stage-id", default=RELEASE_STAGE_ID or os.environ.get("RELEASE_STAGE_ID"), help="Stage ID for created releases (scheduled pipelines only; see RELEASE_STAGE_ID at top of file)")
+    p.add_argument("--dry-run", action="store_true")
+    args = p.parse_args()
+
+    api_key = (args.api_key or "").strip()
+    parent_label_id = (args.label_id or "").strip()
+    pipeline_id = (args.pipeline_id or "").strip()
+    if not api_key:
+        sys.exit("Missing API key. Paste it at the top of this file, or set LINEAR_API_KEY.")
+    if not api_key.startswith("lin_api_"):
+        sys.exit("API key must be a Linear personal API key starting with lin_api_.")
+    if not parent_label_id:
+        sys.exit("Missing label ID. Paste it at the top of this file, or set LABEL_ID.")
+    if not pipeline_id:
+        sys.exit("Missing pipeline ID. Paste it at the top of this file, or set RELEASE_PIPELINE_ID.")
+
+    release_stage_id: Optional[str] = (args.stage_id or "").strip() or None
+    api_key = f"Bearer {api_key}"
+
+    sub_labels = get_sub_labels(api_key, parent_label_id)
+    if not sub_labels:
+        sys.exit("No sub-labels under parent label")
+
+    existing_releases: list[dict] = []
+    if not args.dry_run:
+        existing_releases = get_releases_in_pipeline(api_key, pipeline_id)
+    else:
+        print(f"Dry run: would create {len(sub_labels)} release(s) and add issues as follows:")
+
+    releases_created = 0
+    releases_reused = 0
+    issues_linked = 0
+    issues_skipped = 0
+    issue_errors: list[str] = []
+
+    for lab in sub_labels:
+        name = lab["name"]
+        version = name  # version is set to the label name (unique per pipeline)
+        issues = get_issues_with_label(api_key, lab["id"])
+        print(f"{name}: {len(issues)} issue(s)")
+        if not args.dry_run:
+            release = None
+            for r in existing_releases:
+                if version and r.get("version") == version:
+                    release = r
+                    break
+                if not version and r.get("name") == name:
+                    release = r
+                    break
+            if release is None:
+                release = create_release(
+                    api_key, pipeline_id, name, stage_id=release_stage_id, version=version
+                )
+                existing_releases.append(release)
+                releases_created += 1
+            else:
+                releases_reused += 1
+            for issue in issues:
+                try:
+                    if add_issue_to_release(api_key, issue["id"], release["id"]):
+                        issues_linked += 1
+                    else:
+                        issues_skipped += 1
+                except RuntimeError as e:
+                    issue_errors.append(f"  {name} / {issue['id']}: {e}")
+
+    if not args.dry_run:
+        print(
+            f"\nDone: {len(sub_labels)} label(s) processed, {releases_created} release(s) created, "
+            f"{releases_reused} reused, {issues_linked} issue(s) linked, {issues_skipped} skipped (already linked), "
+            f"{len(issue_errors)} error(s)."
+        )
+        if issue_errors:
+            print("Failed issue associations:")
+            for err in issue_errors:
+                print(err)
+            sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()