Implement the GitHub graph parser (#81)

The GitHub parser transforms GraphQL api data from GitHub into our Graph
data structure. This commit focuses on properly parsing Issues, Pull
Requests, Comments, and Users.

Test Plan:
Run the unit tests. Inspect the snapshot results (particuarly those for
individual pull requests or issues, which are easier to parse) and
verify that the output is appropriate.

src/backend/__snapshots__/githubPlugin.test.js.snap

@@ -0,0 +1,536 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`GithubParser issue parsing parses a simple issue (https://github.com/sourcecred/example-repo/issues/1) 1`] = `
+Object {
+  "edges": Object {
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDA5MzQ4MTg=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDU6SXNzdWUzMDA5MzQ4MTg=\\",\\"type\\":\\"ISSUE\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+  },
+  "nodes": Object {
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "login": "dandelionmane",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDA5MzQ4MTg=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "This is just an example issue.",
+        "number": 1,
+        "title": "An example issue.",
+      },
+    },
+  },
+}
+`;
+
+exports[`GithubParser issue parsing parses an issue with comments (https://github.com/sourcecred/example-repo/issues/6) 1`] = `
+Object {
+  "edges": Object {
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODQ0Mg==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODQ0Mg==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODUzOA==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODUzOA==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDU5OTM3NzM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDU6SXNzdWUzMDU5OTM3NzM=\\",\\"type\\":\\"ISSUE\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"childID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODQ0Mg==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"parentID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDU5OTM3NzM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"CONTAINMENT\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODQ0Mg==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDU6SXNzdWUzMDU5OTM3NzM=\\",\\"type\\":\\"ISSUE\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"childID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODUzOA==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"parentID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDU5OTM3NzM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"CONTAINMENT\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODUzOA==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDU6SXNzdWUzMDU5OTM3NzM=\\",\\"type\\":\\"ISSUE\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+  },
+  "nodes": Object {
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODQ0Mg==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "A wild COMMENT appeared!",
+        "url": "https://github.com/sourcecred/example-repo/issues/6#issuecomment-373768442",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODUzOA==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "And the maintainer said, \\"Let there be comments!\\"",
+        "url": "https://github.com/sourcecred/example-repo/issues/6#issuecomment-373768538",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "login": "dandelionmane",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDU5OTM3NzM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "This issue shall shortly have a few comments.",
+        "number": 6,
+        "title": "An issue with comments",
+      },
+    },
+  },
+}
+`;
+
+exports[`GithubParser pull request parsing parses a pr with review comments (https://github.com/sourcecred/example-repo/pull/3) 1`] = `
+Object {
+  "edges": Object {
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDExOlB1bGxSZXF1ZXN0MTcxODg4NTIy\\\\\\",\\\\\\"type\\\\\\":\\\\\\"PULL_REQUEST\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDExOlB1bGxSZXF1ZXN0MTcxODg4NTIy\\",\\"type\\":\\"PULL_REQUEST\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+  },
+  "nodes": Object {
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDExOlB1bGxSZXF1ZXN0MTcxODg4NTIy\\\\\\",\\\\\\"type\\\\\\":\\\\\\"PULL_REQUEST\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "@wchargin could you please do the following:
+- add a commit comment
+- add a review comment requesting some trivial change
+- i'll change it
+- then approve the pr",
+        "number": 5,
+        "title": "This pull request will be more contentious. I can feel it...",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "login": "dandelionmane",
+      },
+    },
+  },
+}
+`;
+
+exports[`GithubParser pull request parsing parses a simple pull request (https://github.com/sourcecred/example-repo/pull/3) 1`] = `
+Object {
+  "edges": Object {
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDExOlB1bGxSZXF1ZXN0MTcxODg3NzQx\\\\\\",\\\\\\"type\\\\\\":\\\\\\"PULL_REQUEST\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDExOlB1bGxSZXF1ZXN0MTcxODg3NzQx\\",\\"type\\":\\"PULL_REQUEST\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM2OTE2MjIyMg==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM2OTE2MjIyMg==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"childID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM2OTE2MjIyMg==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"parentID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDExOlB1bGxSZXF1ZXN0MTcxODg3NzQx\\\\\\",\\\\\\"type\\\\\\":\\\\\\"PULL_REQUEST\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"CONTAINMENT\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM2OTE2MjIyMg==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDExOlB1bGxSZXF1ZXN0MTcxODg3NzQx\\",\\"type\\":\\"PULL_REQUEST\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+  },
+  "nodes": Object {
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDExOlB1bGxSZXF1ZXN0MTcxODg3NzQx\\\\\\",\\\\\\"type\\\\\\":\\\\\\"PULL_REQUEST\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "Oh look, it's a pull request.",
+        "number": 3,
+        "title": "Add README, merge via PR.",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM2OTE2MjIyMg==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "It seems apropos to reference something from a pull request comment... eg: #2 ",
+        "url": "https://github.com/sourcecred/example-repo/pull/3#issuecomment-369162222",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "login": "dandelionmane",
+      },
+    },
+  },
+}
+`;
+
+exports[`GithubParser whole repo parsing parses the entire example-repo as expected 1`] = `
+Object {
+  "edges": Object {
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDExOlB1bGxSZXF1ZXN0MTcxODg3NzQx\\\\\\",\\\\\\"type\\\\\\":\\\\\\"PULL_REQUEST\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDExOlB1bGxSZXF1ZXN0MTcxODg3NzQx\\",\\"type\\":\\"PULL_REQUEST\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDExOlB1bGxSZXF1ZXN0MTcxODg4NTIy\\\\\\",\\\\\\"type\\\\\\":\\\\\\"PULL_REQUEST\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDExOlB1bGxSZXF1ZXN0MTcxODg4NTIy\\",\\"type\\":\\"PULL_REQUEST\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM2OTE2MjIyMg==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM2OTE2MjIyMg==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODQ0Mg==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODQ0Mg==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODUzOA==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODUzOA==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODcwMw==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODcwMw==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODg1MA==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODg1MA==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDA5MzQ4MTg=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDU6SXNzdWUzMDA5MzQ4MTg=\\",\\"type\\":\\"ISSUE\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDA5MzQ5ODA=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDU6SXNzdWUzMDA5MzQ5ODA=\\",\\"type\\":\\"ISSUE\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDA5MzYzNzQ=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDU6SXNzdWUzMDA5MzYzNzQ=\\",\\"type\\":\\"ISSUE\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"authorID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"},\\\\\\"contributionID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDU5OTM3NzM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"AUTHORSHIP\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDQ6VXNlcjE0MDAwMjM=\\",\\"type\\":\\"USER\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDU6SXNzdWUzMDU5OTM3NzM=\\",\\"type\\":\\"ISSUE\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"childID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM2OTE2MjIyMg==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"parentID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDExOlB1bGxSZXF1ZXN0MTcxODg3NzQx\\\\\\",\\\\\\"type\\\\\\":\\\\\\"PULL_REQUEST\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"CONTAINMENT\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM2OTE2MjIyMg==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDExOlB1bGxSZXF1ZXN0MTcxODg3NzQx\\",\\"type\\":\\"PULL_REQUEST\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"childID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODQ0Mg==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"parentID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDU5OTM3NzM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"CONTAINMENT\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODQ0Mg==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDU6SXNzdWUzMDU5OTM3NzM=\\",\\"type\\":\\"ISSUE\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"childID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODUzOA==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"parentID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDU5OTM3NzM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"CONTAINMENT\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODUzOA==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDU6SXNzdWUzMDU5OTM3NzM=\\",\\"type\\":\\"ISSUE\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"childID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODcwMw==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"parentID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDA5MzQ5ODA=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"CONTAINMENT\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODcwMw==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDU6SXNzdWUzMDA5MzQ5ODA=\\",\\"type\\":\\"ISSUE\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"childID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODg1MA==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"},\\\\\\"parentID\\\\\\":{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDA5MzQ5ODA=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"},\\\\\\"type\\\\\\":\\\\\\"CONTAINMENT\\\\\\"}\\"}": Object {
+      "dst": Object {
+        "id": "{\\"id\\":\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODg1MA==\\",\\"type\\":\\"COMMENT\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+      "payload": Object {},
+      "src": Object {
+        "id": "{\\"id\\":\\"MDU6SXNzdWUzMDA5MzQ5ODA=\\",\\"type\\":\\"ISSUE\\"}",
+        "pluginName": "sourcecred/github-beta",
+        "repositoryName": "sourcecred/example-repo",
+      },
+    },
+  },
+  "nodes": Object {
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDExOlB1bGxSZXF1ZXN0MTcxODg3NzQx\\\\\\",\\\\\\"type\\\\\\":\\\\\\"PULL_REQUEST\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "Oh look, it's a pull request.",
+        "number": 3,
+        "title": "Add README, merge via PR.",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDExOlB1bGxSZXF1ZXN0MTcxODg4NTIy\\\\\\",\\\\\\"type\\\\\\":\\\\\\"PULL_REQUEST\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "@wchargin could you please do the following:
+- add a commit comment
+- add a review comment requesting some trivial change
+- i'll change it
+- then approve the pr",
+        "number": 5,
+        "title": "This pull request will be more contentious. I can feel it...",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM2OTE2MjIyMg==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "It seems apropos to reference something from a pull request comment... eg: #2 ",
+        "url": "https://github.com/sourcecred/example-repo/pull/3#issuecomment-369162222",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODQ0Mg==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "A wild COMMENT appeared!",
+        "url": "https://github.com/sourcecred/example-repo/issues/6#issuecomment-373768442",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODUzOA==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "And the maintainer said, \\"Let there be comments!\\"",
+        "url": "https://github.com/sourcecred/example-repo/issues/6#issuecomment-373768538",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODcwMw==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "It should also be possible to reference by exact url: https://github.com/sourcecred/example-repo/issues/6",
+        "url": "https://github.com/sourcecred/example-repo/issues/2#issuecomment-373768703",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDEyOklzc3VlQ29tbWVudDM3Mzc2ODg1MA==\\\\\\",\\\\\\"type\\\\\\":\\\\\\"COMMENT\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "We might also reference individual comments directly.
+https://github.com/sourcecred/example-repo/issues/6#issuecomment-373768538",
+        "url": "https://github.com/sourcecred/example-repo/issues/2#issuecomment-373768850",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDQ6VXNlcjE0MDAwMjM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"USER\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "login": "dandelionmane",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDA5MzQ4MTg=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "This is just an example issue.",
+        "number": 1,
+        "title": "An example issue.",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDA5MzQ5ODA=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "This issue references another issue, namely #1",
+        "number": 2,
+        "title": "A referencing issue.",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDA5MzYzNzQ=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "Alas, its life as an open issue had only just begun.",
+        "number": 4,
+        "title": "A closed pull request",
+      },
+    },
+    "{\\"pluginName\\":\\"sourcecred/github-beta\\",\\"repositoryName\\":\\"sourcecred/example-repo\\",\\"id\\":\\"{\\\\\\"id\\\\\\":\\\\\\"MDU6SXNzdWUzMDU5OTM3NzM=\\\\\\",\\\\\\"type\\\\\\":\\\\\\"ISSUE\\\\\\"}\\"}": Object {
+      "payload": Object {
+        "body": "This issue shall shortly have a few comments.",
+        "number": 6,
+        "title": "An issue with comments",
+      },
+    },
+  },
+}
+`;

src/backend/githubPlugin.js

@@ -1,43 +1,259 @@
 // @flow
 
+import type {Node, Edge} from "./graph";
+import type {Address} from "./address";
+import {Graph} from "./graph";
+const stringify = require("json-stable-stringify");
+
 export const GITHUB_PLUGIN_NAME = "sourcecred/github-beta";
 
 export type IssueNodePayload = {|
-  +type: "ISSUE",
   +title: string,
   +number: number,
+  +body: string,
+|};
+export type IssueNodeID = {|
+  +type: "ISSUE",
+  +id: string,
 |};
 
 export type PullRequestNodePayload = {|
-  +type: "PULL_REQUEST",
   +title: string,
   +number: number,
+  +body: string,
+|};
+export type PullRequestNodeID = {|
+  +type: "PULL_REQUEST",
+  +id: string,
 |};
 
 export type CommentNodePayload = {|
-  +type: "COMMENT",
+  +url: string,
   +body: string,
 |};
+export type CommentNodeID = {|
+  +type: "COMMENT",
+  +id: string,
+|};
 
 export type UserNodePayload = {|
-  +type: "USER",
-  +userName: string,
+  +login: string,
 |};
+export type UserNodeID = {|
+  +type: "USER",
+  +id: string,
+|};
+
+export type BotNodePayload = {|
+  +login: string,
+|};
+export type BotNodeID = {|
+  +type: "BOT",
+  +id: string,
+|};
+
+export type OrganizationNodePayload = {|
+  +login: string,
+|};
+export type OrganizationNodeID = {|
+  +type: "ORGANIZATION",
+  +id: string,
+|};
+
+export type AuthorNodePayload =
+  | UserNodePayload
+  | BotNodePayload
+  | OrganizationNodePayload;
+export type AuthorNodeID = UserNodeID | BotNodeID | OrganizationNodeID;
 
 export type NodePayload =
   | IssueNodePayload
   | PullRequestNodePayload
   | CommentNodePayload
-  | UserNodePayload;
-export type NodeType = $ElementType<NodePayload, "type">;
+  | AuthorNodePayload;
+export type NodeID =
+  | IssueNodeID
+  | PullRequestNodeID
+  | CommentNodeID
+  | AuthorNodeID;
+export type NodeType = $ElementType<NodeID, "type">;
 
-export type AuthorshipEdgePayload = {|
+export type AuthorshipEdgePayload = {};
+export type AuthorshipEdgeID = {
   +type: "AUTHORSHIP",
-|};
-
-export type ReferenceEdgePayload = {|
+  +contributionID: NodeID,
+  +authorID: NodeID,
+};
+export type ContainmentEdgePayload = {};
+export type ContainmentEdgeID = {
+  +type: "CONTAINMENT",
+  +childID: NodeID,
+  +parentID: NodeID,
+};
+export type ReferenceEdgePayload = {};
+export type ReferenceEdgeID = {
   +type: "REFERENCE",
-|};
+  +referrer: NodeID,
+  +referent: NodeID,
+};
 
-export type EdgePayload = AuthorshipEdgePayload | ReferenceEdgePayload;
-export type EdgeType = $ElementType<EdgePayload, "type">;
+export type EdgePayload =
+  | AuthorshipEdgePayload
+  | ContainmentEdgePayload
+  | ReferenceEdgePayload;
+export type EdgeID = AuthorshipEdgeID | ContainmentEdgeID | ReferenceEdgeID;
+export type EdgeType = $ElementType<EdgeID, "type">;
+
+export function getNodeType(n: Node<NodePayload>): NodeType {
+  return JSON.parse(n.address.id).type;
+}
+
+export function getEdgeType(e: Edge<EdgePayload>): EdgeType {
+  return JSON.parse(e.address.id).type;
+}
+
+export class GithubParser {
+  repositoryName: string;
+  graph: Graph<NodePayload, EdgePayload>;
+
+  constructor(repositoryName: string) {
+    this.repositoryName = repositoryName;
+    this.graph = new Graph();
+  }
+
+  makeAddress(id: NodeID | EdgeID): Address {
+    return {
+      pluginName: GITHUB_PLUGIN_NAME,
+      repositoryName: this.repositoryName,
+      id: stringify(id),
+    };
+  }
+
+  addAuthorship(
+    authoredNodeID: IssueNodeID | PullRequestNodeID | CommentNodeID,
+    authoredNode: Node<
+      IssueNodePayload | PullRequestNodePayload | CommentNodePayload
+    >,
+    authorJson: *
+  ) {
+    let authorPayload: AuthorNodePayload = {login: authorJson.login};
+    let authorID: AuthorNodeID;
+    switch (authorJson.__typename) {
+      case "User":
+        authorID = {type: "USER", id: authorJson.id};
+        break;
+      case "Bot":
+        authorID = {type: "BOT", id: authorJson.id};
+        break;
+      case "Organization":
+        authorID = {type: "ORGANIZATION", id: authorJson.id};
+        break;
+      default:
+        throw new Error(
+          `Unexpected author type ${authorJson.__typename} on ${stringify(
+            authorJson
+          )}`
+        );
+    }
+
+    const authorNode: Node<AuthorNodePayload> = {
+      address: this.makeAddress(authorID),
+      payload: authorPayload,
+    };
+    this.graph.addNode(authorNode);
+
+    const authorshipID = {
+      type: "AUTHORSHIP",
+      contributionID: authoredNodeID,
+      authorID,
+    };
+    const authorshipEdge: Edge<AuthorshipEdgePayload> = {
+      address: this.makeAddress(authorshipID),
+      payload: {},
+      src: authoredNode.address,
+      dst: authorNode.address,
+    };
+    this.graph.addEdge(authorshipEdge);
+  }
+
+  addComment(
+    parentID: IssueNodeID | PullRequestNodeID,
+    parentNode: Node<IssueNodePayload | PullRequestNodePayload>,
+    commentJson: *
+  ) {
+    const commentID: CommentNodeID = {type: "COMMENT", id: commentJson.id};
+    const commentNodePayload: CommentNodePayload = {
+      body: commentJson.body,
+      url: commentJson.url,
+    };
+    const commentNode: Node<CommentNodePayload> = {
+      address: this.makeAddress(commentID),
+      payload: commentNodePayload,
+    };
+    this.graph.addNode(commentNode);
+
+    this.addAuthorship(commentID, commentNode, commentJson.author);
+
+    const containmentID: ContainmentEdgeID = {
+      type: "CONTAINMENT",
+      childID: commentID,
+      parentID: parentID,
+    };
+    const containmentEdge = {
+      address: this.makeAddress(containmentID),
+      payload: {},
+      src: parentNode.address,
+      dst: commentNode.address,
+    };
+    this.graph.addEdge(containmentEdge);
+  }
+
+  addIssue(issueJson: *) {
+    const issueID: IssueNodeID = {type: "ISSUE", id: issueJson.id};
+    const issuePayload: IssueNodePayload = {
+      number: issueJson.number,
+      title: issueJson.title,
+      body: issueJson.body,
+    };
+    const issueNode: Node<IssueNodePayload> = {
+      address: this.makeAddress(issueID),
+      payload: issuePayload,
+    };
+    this.graph.addNode(issueNode);
+
+    this.addAuthorship(issueID, issueNode, issueJson.author);
+
+    issueJson.comments.nodes.forEach((c) =>
+      this.addComment(issueID, issueNode, c)
+    );
+  }
+
+  addPullRequest(prJson: *) {
+    const pullRequestID: PullRequestNodeID = {
+      type: "PULL_REQUEST",
+      id: prJson.id,
+    };
+    const pullRequestPayload: PullRequestNodePayload = {
+      number: prJson.number,
+      title: prJson.title,
+      body: prJson.body,
+    };
+    const pullRequestNode: Node<PullRequestNodePayload> = {
+      address: this.makeAddress(pullRequestID),
+      payload: pullRequestPayload,
+    };
+    this.graph.addNode(pullRequestNode);
+
+    this.addAuthorship(pullRequestID, pullRequestNode, prJson.author);
+    prJson.comments.nodes.forEach((c) =>
+      this.addComment(pullRequestID, pullRequestNode, c)
+    );
+  }
+
+  addData(dataJson: *) {
+    dataJson.repository.issues.nodes.forEach((i) => this.addIssue(i));
+    dataJson.repository.pullRequests.nodes.forEach((pr) =>
+      this.addPullRequest(pr)
+    );
+  }
+}

src/backend/githubPlugin.test.js

@@ -0,0 +1,84 @@
+// @flow
+
+import {GithubParser, getNodeType, getEdgeType} from "./githubPlugin";
+import exampleRepoData from "./githubDemoData/example-repo.json";
+
+describe("GithubParser", () => {
+  describe("whole repo parsing", () => {
+    const parser = new GithubParser("sourcecred/example-repo");
+    parser.addData(exampleRepoData.data);
+    const graph = parser.graph;
+
+    it("parses the entire example-repo as expected", () => {
+      expect(graph).toMatchSnapshot();
+    });
+
+    it("every comment has an author and container", () => {
+      const comments = graph
+        .getAllNodes()
+        .filter((n) => getNodeType(n) === "COMMENT");
+      expect(comments).not.toHaveLength(0);
+      comments.forEach((c) => {
+        const authorEdges = graph
+          .getOutEdges(c.address)
+          .filter((e) => getEdgeType(e) === "AUTHORSHIP");
+        expect(authorEdges.length).toBe(1);
+        const containerEdges = graph
+          .getInEdges(c.address)
+          .filter((e) => getEdgeType(e) === "CONTAINMENT");
+        expect(containerEdges.length).toBe(1);
+      });
+    });
+
+    it("every pull request and issue has an author", () => {
+      const issuesAndPRs = graph
+        .getAllNodes()
+        .filter(
+          (n) => ["ISSUE", "PULL_REQUEST"].indexOf(getNodeType(n)) !== -1
+        );
+      expect(issuesAndPRs).not.toHaveLength(0);
+      issuesAndPRs.forEach((x) => {
+        const outEdges = graph.getOutEdges(x.address);
+        const authorEdges = outEdges.filter(
+          (e) => getEdgeType(e) === "AUTHORSHIP"
+        );
+        expect(authorEdges.length).toBe(1);
+      });
+    });
+  });
+
+  describe("issue parsing", () => {
+    it("parses a simple issue (https://github.com/sourcecred/example-repo/issues/1)", () => {
+      const issue1 = exampleRepoData.data.repository.issues.nodes[0];
+      expect(issue1.number).toBe(1);
+      const parser = new GithubParser("sourcecred/example-repo");
+      parser.addIssue(issue1);
+      expect(parser.graph).toMatchSnapshot();
+    });
+
+    it("parses an issue with comments (https://github.com/sourcecred/example-repo/issues/6)", () => {
+      const issue6 = exampleRepoData.data.repository.issues.nodes[3];
+      expect(issue6.number).toBe(6);
+      const parser = new GithubParser("sourcecred/example-repo");
+      parser.addIssue(issue6);
+      expect(parser.graph).toMatchSnapshot();
+    });
+  });
+
+  describe("pull request parsing", () => {
+    it("parses a simple pull request (https://github.com/sourcecred/example-repo/pull/3)", () => {
+      const pr3 = exampleRepoData.data.repository.pullRequests.nodes[0];
+      expect(pr3.number).toBe(3);
+      const parser = new GithubParser("sourcecred/example-repo");
+      parser.addPullRequest(pr3);
+      expect(parser.graph).toMatchSnapshot();
+    });
+    it("parses a pr with review comments (https://github.com/sourcecred/example-repo/pull/3)", () => {
+      const pr5 = exampleRepoData.data.repository.pullRequests.nodes[1];
+      expect(pr5.number).toBe(5);
+      const parser = new GithubParser("sourcecred/example-repo");
+      parser.addPullRequest(pr5);
+      expect(parser.graph).toMatchSnapshot();
+    });
+  });
+});