feat: add github_snowflake plugin for Snowflake-backed GitHub ingestion

backend/helpers/snowflakehelper/db.go

@@ -0,0 +1,95 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Package snowflakehelper provides shared Snowflake connectivity helpers for
+// Konflux-owned snowflake-backed DevLake plugins (github_snowflake, jira_snowflake).
+package snowflakehelper
+
+import (
+	"crypto/rsa"
+	"crypto/x509"
+	"database/sql"
+	"encoding/pem"
+	"fmt"
+
+	"github.com/apache/incubator-devlake/core/errors"
+	sf "github.com/snowflakedb/gosnowflake"
+)
+
+// Open opens a database/sql connection to Snowflake.
+//
+// authType controls authentication:
+//   - "keypair" (default): JWT key-pair auth using privateKeyPEM. Works in containers and CI.
+//   - "externalbrowser": SSO via browser pop-up. Only works when DevLake runs on a desktop host
+//     (i.e. via `make run`, not inside a Docker container).
+func Open(account, user, authType, privateKeyPEM, database, schema, warehouse, role string) (*sql.DB, errors.Error) {
+	cfg := &sf.Config{
+		Account:  account,
+		User:     user,
+		Database: database,
+		Schema:   schema,
+	}
+	if warehouse != "" {
+		cfg.Warehouse = warehouse
+	}
+	if role != "" {
+		cfg.Role = role
+	}
+
+	switch authType {
+	case "", "keypair":
+		privKey, err := ParseRSAPrivateKey(privateKeyPEM)
+		if err != nil {
+			return nil, errors.Default.Wrap(err, "failed to parse Snowflake private key")
+		}
+		cfg.Authenticator = sf.AuthTypeJwt
+		cfg.PrivateKey = privKey
+	case "externalbrowser":
+		cfg.Authenticator = sf.AuthTypeExternalBrowser
+	default:
+		return nil, errors.BadInput.New(fmt.Sprintf(
+			`unsupported authType %q; must be "keypair" or "externalbrowser"`, authType,
+		))
+	}
+
+	dsn, goErr := sf.DSN(cfg)
+	if goErr != nil {
+		return nil, errors.Default.Wrap(goErr, "failed to build Snowflake DSN")
+	}
+	db, goErr := sql.Open("snowflake", dsn)
+	if goErr != nil {
+		return nil, errors.Default.Wrap(goErr, "failed to open Snowflake connection")
+	}
+	return db, nil
+}
+
+// ParseRSAPrivateKey parses a PKCS#8 PEM-encoded RSA private key.
+func ParseRSAPrivateKey(pemStr string) (*rsa.PrivateKey, error) {
+	block, _ := pem.Decode([]byte(pemStr))
+	if block == nil {
+		return nil, fmt.Errorf("failed to decode PEM block from private key")
+	}
+	key, err := x509.ParsePKCS8PrivateKey(block.Bytes)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse PKCS8 private key: %w", err)
+	}
+	rsaKey, ok := key.(*rsa.PrivateKey)
+	if !ok {
+		return nil, fmt.Errorf("private key is not an RSA key")
+	}
+	return rsaKey, nil
+}

backend/helpers/snowflakehelper/db_test.go

@@ -0,0 +1,79 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package snowflakehelper
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func generateTestPKCS8PEM(t *testing.T) string {
+	t.Helper()
+	key, err := rsa.GenerateKey(rand.Reader, 2048)
+	require.NoError(t, err)
+	der, err := x509.MarshalPKCS8PrivateKey(key)
+	require.NoError(t, err)
+	block := &pem.Block{Type: "PRIVATE KEY", Bytes: der}
+	return string(pem.EncodeToMemory(block))
+}
+
+func TestOpen_InvalidAuthType(t *testing.T) {
+	_, err := Open("acct", "user", "keypai", "", "db", "schema", "", "")
+	assert.NotNil(t, err)
+	assert.Contains(t, err.Error(), "unsupported authType")
+}
+
+func TestParseRSAPrivateKey_ValidPKCS8(t *testing.T) {
+	pemStr := generateTestPKCS8PEM(t)
+	key, err := ParseRSAPrivateKey(pemStr)
+	require.NoError(t, err)
+	assert.NotNil(t, key)
+	assert.Equal(t, 2048, key.N.BitLen())
+}
+
+func TestParseRSAPrivateKey_EmptyString(t *testing.T) {
+	_, err := ParseRSAPrivateKey("")
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "PEM")
+}
+
+func TestParseRSAPrivateKey_InvalidPEM(t *testing.T) {
+	_, err := ParseRSAPrivateKey("not a pem block")
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "PEM")
+}
+
+func TestParseRSAPrivateKey_WrongKeyType(t *testing.T) {
+	// PKCS#1 format (BEGIN RSA PRIVATE KEY) is not PKCS#8, should fail ParsePKCS8PrivateKey
+	key, genErr := rsa.GenerateKey(rand.Reader, 2048)
+	require.NoError(t, genErr)
+	block := &pem.Block{
+		Type:  "RSA PRIVATE KEY",
+		Bytes: x509.MarshalPKCS1PrivateKey(key),
+	}
+	pemStr := string(pem.EncodeToMemory(block))
+
+	_, err := ParseRSAPrivateKey(pemStr)
+	assert.Error(t, err, "PKCS#1 key should be rejected; expected PKCS#8")
+}

backend/plugins/github_snowflake/AGENTS.md

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+# github_snowflake Plugin — Agent Context
+
+Drop-in replacement for the GitHub API plugin per repository. Reads GitHub data
+from a Snowflake replica (Fivetran, `GITHUB_DB.MARTS`) and writes into the
+existing `_tool_github_*` tool-layer tables, then runs domain-layer convertors to
+produce `code.*` domain records.
+
+## Build & Test
+
+```bash
+cd backend
+go build ./plugins/github_snowflake/...
+go test  ./plugins/github_snowflake/... -v
+golangci-lint run ./plugins/github_snowflake/...
+```
+
+Unit tests do **not** need MySQL. A real pipeline run does.
+
+### Minimal real-run setup
+
+1. Start MySQL: `podman compose -f docker-compose-dev.yml up -d mysql`
+2. Ensure `.env` has `DB_URL`, `ENCRYPTION_SECRET`, and (for local API) `AUTH_ENABLED=false`.
+   For native `make run`, use `localhost` (or `127.0.0.1`) in `DB_URL` — `env.example`'s
+   `@mysql:3306` host only resolves inside the compose network.
+3. Run the server (native desktop required for `externalbrowser` SSO):
+
+```bash
+cd backend
+# Include github so its migrations create shared _tool_github_* tables (needed on a fresh DB).
+DEVLAKE_PLUGINS=github,github_snowflake DISABLED_REMOTE_PLUGINS=true ENV_FILE=../.env make build-plugin run
+```
+
+4. Create a connection (`authType: externalbrowser` for local desktop) + run a pipeline for one repo (`githubId` + `fullName`)
+
+Full step-by-step (Snowflake check, migrations, curl examples, result queries):
+[docs/github-snowflake-local-testing.md](../../../docs/github-snowflake-local-testing.md)
+
+## Layout
+
+```
+impl/impl.go              — plugin interfaces, SubTaskMetas, PrepareTaskData
+api/connection_api.go     — connection CRUD (POST/GET/PATCH/DELETE)
+models/connection.go      — SnowflakeGithubConnection (table: _tool_github_snowflake_connections)
+models/migrationscripts/  — DB migrations
+tasks/task_data.go        — GithubSnowflakeOptions, GithubSnowflakeTaskData
+tasks/shared.go           — URL helpers
+tasks/sync_*.go           — Snowflake SQL queries → _tool_github_* tool-layer tables
+tasks/convert_*.go        — domain-layer convertors (adapted copies of github/tasks/*)
+```
+
+Shared Snowflake connectivity lives in `helpers/snowflakehelper` (`Open`, `ParseRSAPrivateKey`).
+
+## Subtask pipeline order
+
+1. `syncRepos`         — REPOSITORY → `_tool_github_repos`
+2. `syncPullRequests`  — PULL_REQUEST ⨝ ISSUE ⨝ ISSUE_MERGED ⨝ USER → `_tool_github_pull_requests`
+3. `syncPrCommits`     — COMMIT_PULL_REQUEST ⨝ COMMIT → `_tool_github_pull_request_commits`
+4. `syncPrReviews`     — PULL_REQUEST_REVIEW ⨝ USER → `_tool_github_pull_request_reviews`
+5. `syncReviewers`     — REQUESTED_REVIEWER_HISTORY → `_tool_github_reviewers`
+6. `syncAccounts`      — USER (+ USER_EMAIL) → `_tool_github_accounts` + `_tool_github_repo_accounts`
+7. `convertRepo` / `convertPullRequests` / `convertPrCommits` / `convertPrReviews` / `convertReviews` / `convertAccounts`
+
+## Key conventions
+
+- **Scope unit is `GithubRepo`** (numeric `githubId` + `fullName` owner/repo).
+- **No raw-table layer**: writes directly to `_tool_github_*`. Convertors use
+  `_raw_data_params`-scoped deletion for full sync (same pattern as jira_snowflake).
+- **AuthType**: `"keypair"` (default, JWT) or `"externalbrowser"` (SSO, desktop only).
+- **Connection defaults**: Database=`GITHUB_DB`, Schema=`MARTS`, Warehouse=`DEFAULT`.
+- **PR line/comment counts** are unavailable in Snowflake — leave 0.
+- **Actions jobs** table does not exist — never enable job sync/convertors.
+- Do not log commit author emails in debug output.
+
+## Snowflake schema notes (GITHUB_DB.MARTS — verified 2026-07-21)
+
+| Table | Notes |
+|---|---|
+| `REPOSITORY` | No HTML/Clone URL — derive from FULL_NAME |
+| `PULL_REQUEST` + `ISSUE` + `ISSUE_MERGED` | Fivetran splits PR fields across three tables |
+| `COMMIT_PULL_REQUEST` | Orphan PR links exist — always INNER JOIN PULL_REQUEST |
+| `PULL_REQUEST_REVIEW` | States: APPROVED, COMMENTED, DISMISSED, CHANGES_REQUESTED |
+| `REQUESTED_REVIEWER_HISTORY` | Filter `REQUESTED_REVIEWER_TYPE = 'user'`; take latest non-removed |
+| `"USER"` / `USER_EMAIL` | Identity present (not PII-stripped). Quote `"USER"` — reserved keyword in Snowflake. |
+
+Pilot coverage today: **konflux-ci** org only in MARTS.
+
+## GitHub plugin models dependency
+
+Imports `plugins/github/models` for tool-layer structs. This is a shared schema
+dependency, not a business-logic cross-import. Runtime API/business logic does
+not require the github plugin, but a fresh DB still needs github loaded once so
+its migrations create `_tool_github_*`. `impl.Init` registers a minimal
+`githubPluginStub` for didgen.
+
+## Don'ts
+
+- Don't add models without a migration in `migrationscripts/register.go`
+- Don't skip the Apache 2.0 license header on new `.go` files
+- Don't configure the same repo in both a GitHub API connection and a
+  github_snowflake connection simultaneously — this causes domain ID duplication
+- Don't enable Actions job convertors (table missing in Snowflake)

backend/plugins/github_snowflake/api/connection_api.go

@@ -0,0 +1,75 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package api
+
+import (
+	"github.com/apache/incubator-devlake/core/context"
+	"github.com/apache/incubator-devlake/core/errors"
+	"github.com/apache/incubator-devlake/core/plugin"
+	helper "github.com/apache/incubator-devlake/helpers/pluginhelper/api"
+	"github.com/apache/incubator-devlake/plugins/github_snowflake/models"
+)
+
+var connHelper *helper.ConnectionApiHelper
+
+// Init initialises the API layer. Called from impl.Init.
+func Init(br context.BasicRes, p plugin.PluginMeta) {
+	connHelper = helper.NewConnectionHelper(br, nil, p.Name())
+}
+
+// PostConnections creates a new SnowflakeGithubConnection.
+func PostConnections(input *plugin.ApiResourceInput) (*plugin.ApiResourceOutput, errors.Error) {
+	connection := &models.SnowflakeGithubConnection{}
+	if err := connHelper.Create(connection, input); err != nil {
+		return nil, err
+	}
+	return &plugin.ApiResourceOutput{Body: connection, Status: 200}, nil
+}
+
+// GetConnections returns all SnowflakeGithubConnections.
+func GetConnections(_ *plugin.ApiResourceInput) (*plugin.ApiResourceOutput, errors.Error) {
+	var connections []models.SnowflakeGithubConnection
+	if err := connHelper.List(&connections); err != nil {
+		return nil, err
+	}
+	return &plugin.ApiResourceOutput{Body: connections, Status: 200}, nil
+}
+
+// GetConnection returns a single connection by connectionId path param.
+func GetConnection(input *plugin.ApiResourceInput) (*plugin.ApiResourceOutput, errors.Error) {
+	connection := &models.SnowflakeGithubConnection{}
+	if err := connHelper.First(connection, input.Params); err != nil {
+		return nil, err
+	}
+	return &plugin.ApiResourceOutput{Body: connection, Status: 200}, nil
+}
+
+// PatchConnection updates fields on an existing connection.
+func PatchConnection(input *plugin.ApiResourceInput) (*plugin.ApiResourceOutput, errors.Error) {
+	connection := &models.SnowflakeGithubConnection{}
+	if err := connHelper.Patch(connection, input); err != nil {
+		return nil, err
+	}
+	return &plugin.ApiResourceOutput{Body: connection, Status: 200}, nil
+}
+
+// DeleteConnection removes a connection.
+func DeleteConnection(input *plugin.ApiResourceInput) (*plugin.ApiResourceOutput, errors.Error) {
+	connection := &models.SnowflakeGithubConnection{}
+	return connHelper.Delete(connection, input)
+}