mirror of
https://github.com/status-im/sourcecred.git
synced 2025-02-26 03:05:13 +00:00
Add edge type definitions for V3 Git plugin (#404)
Summary: This is modeled after the GitHub edge module format. In particular, the whole length encoding garbage is directly copied. As in that module, we decline to test the error paths. Test Plan: Unit tests added; run `yarn travis`. Snapshots are readable. wchargin-branch: git-v3-edges
This commit is contained in:
William Chargin
GitHub
parent
7c1b3ca835
commit
448fb3e1a8
140
src/v3/plugins/git/__snapshots__/edges.test.js.snap
Normal file
140
src/v3/plugins/git/__snapshots__/edges.test.js.snap
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@ -0,0 +1,140 @@
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// Jest Snapshot v1, https://goo.gl/fbAQLP
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exports[`plugins/git/edges createEdge works for "becomes" 1`] = `
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Object {
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"addressParts": Array [
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"sourcecred",
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"git",
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"BECOMES",
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"3",
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"TREE_ENTRY",
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"de07d6d2b2977734cf39d2b9aff4135eefce3eb7",
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"old_science.txt",
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"3",
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"TREE_ENTRY",
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"7be3ecfee5314ffa9b2d93fc4377792b2d6d70ed",
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"science.txt",
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],
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"dstParts": Array [
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"sourcecred",
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"git",
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"TREE_ENTRY",
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"7be3ecfee5314ffa9b2d93fc4377792b2d6d70ed",
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"science.txt",
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],
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"srcParts": Array [
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"sourcecred",
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"git",
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"TREE_ENTRY",
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"de07d6d2b2977734cf39d2b9aff4135eefce3eb7",
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"old_science.txt",
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],
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}
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`;
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exports[`plugins/git/edges createEdge works for "hasContents" 1`] = `
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Object {
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"addressParts": Array [
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"sourcecred",
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"git",
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"HAS_CONTENTS",
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"3",
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"TREE_ENTRY",
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"7be3ecfee5314ffa9b2d93fc4377792b2d6d70ed",
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"science.txt",
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],
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"dstParts": Array [
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"sourcecred",
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"git",
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"BLOB",
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"f1f2514ca6d7a6a1a0511957021b1995bf9ace1c",
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],
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"srcParts": Array [
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"sourcecred",
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"git",
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"TREE_ENTRY",
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"7be3ecfee5314ffa9b2d93fc4377792b2d6d70ed",
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"science.txt",
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],
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}
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`;
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exports[`plugins/git/edges createEdge works for "hasParent" 1`] = `
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Object {
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"addressParts": Array [
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"sourcecred",
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"git",
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"HAS_PARENT",
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"2",
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"COMMIT",
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"3715ddfb8d4c4fd2a6f6af75488c82f84c92ec2f",
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"2",
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"COMMIT",
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"69c5aad50eec8f2a0a07c988c3b283a6490eb45b",
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],
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"dstParts": Array [
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"sourcecred",
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"git",
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"COMMIT",
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"69c5aad50eec8f2a0a07c988c3b283a6490eb45b",
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],
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"srcParts": Array [
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"sourcecred",
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"git",
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"COMMIT",
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"3715ddfb8d4c4fd2a6f6af75488c82f84c92ec2f",
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],
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}
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`;
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exports[`plugins/git/edges createEdge works for "hasTree" 1`] = `
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Object {
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"addressParts": Array [
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"sourcecred",
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"git",
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"HAS_TREE",
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"2",
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"COMMIT",
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"3715ddfb8d4c4fd2a6f6af75488c82f84c92ec2f",
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],
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"dstParts": Array [
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"sourcecred",
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"git",
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"TREE",
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"7be3ecfee5314ffa9b2d93fc4377792b2d6d70ed",
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],
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"srcParts": Array [
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"sourcecred",
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"git",
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"COMMIT",
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"3715ddfb8d4c4fd2a6f6af75488c82f84c92ec2f",
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],
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}
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`;
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exports[`plugins/git/edges createEdge works for "includes" 1`] = `
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Object {
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"addressParts": Array [
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"sourcecred",
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"git",
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"INCLUDES",
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"3",
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"TREE_ENTRY",
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"7be3ecfee5314ffa9b2d93fc4377792b2d6d70ed",
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"science.txt",
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],
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"dstParts": Array [
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"sourcecred",
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"git",
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"TREE_ENTRY",
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"7be3ecfee5314ffa9b2d93fc4377792b2d6d70ed",
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"science.txt",
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],
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"srcParts": Array [
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"sourcecred",
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"git",
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"TREE",
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"7be3ecfee5314ffa9b2d93fc4377792b2d6d70ed",
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],
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}
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`;
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244
src/v3/plugins/git/edges.js
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244
src/v3/plugins/git/edges.js
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@ -0,0 +1,244 @@
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// @flow
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import {
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type Edge,
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type EdgeAddressT,
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EdgeAddress,
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NodeAddress,
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} from "../../core/graph";
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import * as GitNode from "./nodes";
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export opaque type RawAddress: EdgeAddressT = EdgeAddressT;
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export const HAS_TREE_TYPE: "HAS_TREE" = "HAS_TREE";
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export const HAS_PARENT_TYPE: "HAS_PARENT" = "HAS_PARENT";
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export const INCLUDES_TYPE: "INCLUDES" = "INCLUDES";
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export const BECOMES_TYPE: "BECOMES" = "BECOMES";
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export const HAS_CONTENTS_TYPE: "HAS_CONTENTS" = "HAS_CONTENTS";
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const GIT_PREFIX = EdgeAddress.fromParts(["sourcecred", "git"]);
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function gitEdgeAddress(...parts: string[]): RawAddress {
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return EdgeAddress.append(GIT_PREFIX, ...parts);
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}
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export const _Prefix = Object.freeze({
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base: GIT_PREFIX,
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hasTree: gitEdgeAddress(HAS_TREE_TYPE),
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hasParent: gitEdgeAddress(HAS_PARENT_TYPE),
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includes: gitEdgeAddress(INCLUDES_TYPE),
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becomes: gitEdgeAddress(BECOMES_TYPE),
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hasContents: gitEdgeAddress(HAS_CONTENTS_TYPE),
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});
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export type HasTreeAddress = {|
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type: typeof HAS_TREE_TYPE,
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commit: GitNode.CommitAddress,
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|};
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export type HasParentAddress = {|
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type: typeof HAS_PARENT_TYPE,
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child: GitNode.CommitAddress,
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parent: GitNode.CommitAddress,
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|};
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export type IncludesAddress = {|
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type: typeof INCLUDES_TYPE,
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treeEntry: GitNode.TreeEntryAddress,
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|};
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export type BecomesAddress = {|
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type: typeof BECOMES_TYPE,
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was: GitNode.TreeEntryAddress,
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becomes: GitNode.TreeEntryAddress,
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|};
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export type HasContentsAddress = {|
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type: typeof HAS_CONTENTS_TYPE,
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treeEntry: GitNode.TreeEntryAddress,
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|};
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export type StructuredAddress =
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| HasTreeAddress
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| HasParentAddress
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| IncludesAddress
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| BecomesAddress
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| HasContentsAddress;
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export const createEdge = Object.freeze({
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hasTree: (
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commit: GitNode.CommitAddress,
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tree: GitNode.TreeAddress
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): Edge => ({
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address: toRaw({type: HAS_TREE_TYPE, commit}),
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src: GitNode.toRaw(commit),
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dst: GitNode.toRaw(tree),
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}),
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hasParent: (
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child: GitNode.CommitAddress,
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parent: GitNode.CommitAddress
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): Edge => ({
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address: toRaw({type: HAS_PARENT_TYPE, child, parent}),
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src: GitNode.toRaw(child),
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dst: GitNode.toRaw(parent),
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}),
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includes: (
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tree: GitNode.TreeAddress,
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treeEntry: GitNode.TreeEntryAddress
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): Edge => ({
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address: toRaw({type: INCLUDES_TYPE, treeEntry}),
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src: GitNode.toRaw(tree),
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dst: GitNode.toRaw(treeEntry),
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}),
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becomes: (
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was: GitNode.TreeEntryAddress,
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becomes: GitNode.TreeEntryAddress
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): Edge => ({
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address: toRaw({type: BECOMES_TYPE, was, becomes}),
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src: GitNode.toRaw(was),
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dst: GitNode.toRaw(becomes),
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}),
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hasContents: (
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treeEntry: GitNode.TreeEntryAddress,
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contents: GitNode.TreeEntryContentsAddress
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): Edge => ({
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address: toRaw({type: HAS_CONTENTS_TYPE, treeEntry}),
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src: GitNode.toRaw(treeEntry),
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dst: GitNode.toRaw(contents),
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}),
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});
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const NODE_PREFIX_LENGTH = NodeAddress.toParts(GitNode._gitAddress()).length;
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function lengthEncode(x: GitNode.RawAddress): $ReadOnlyArray<string> {
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const baseParts = NodeAddress.toParts(x).slice(NODE_PREFIX_LENGTH);
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return [String(baseParts.length), ...baseParts];
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}
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function lengthDecode(
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x: $ReadOnlyArray<string>,
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fail: () => Error
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): {|+parts: $ReadOnlyArray<string>, +rest: $ReadOnlyArray<string>|} {
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if (x.length === 0) {
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// Not length-encoded.
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throw fail();
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}
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const [lengthString, ...allParts] = x;
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const length = parseInt(lengthString, 10);
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if (isNaN(length)) {
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throw fail();
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}
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if (length > allParts.length) {
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// Not enough elements.
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throw fail();
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}
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return {parts: allParts.slice(0, length), rest: allParts.slice(length)};
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}
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function multiLengthDecode(x: $ReadOnlyArray<string>, fail: () => Error) {
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let remaining = x;
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let partses = [];
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while (remaining.length > 0) {
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const {parts, rest} = lengthDecode(remaining, fail);
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partses.push(parts);
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remaining = rest;
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}
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return partses;
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}
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export function fromRaw(x: RawAddress): StructuredAddress {
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function fail() {
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return new Error(`Bad address: ${EdgeAddress.toString(x)}`);
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}
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if (!EdgeAddress.hasPrefix(x, GIT_PREFIX)) {
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throw fail();
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}
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const [_unused_sc, _unused_git, _type, ...rest] = EdgeAddress.toParts(x);
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const type: $ElementType<StructuredAddress, "type"> = (_type: any);
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switch (type) {
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case "HAS_TREE": {
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const parts = multiLengthDecode(rest, fail);
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if (parts.length !== 1) throw fail();
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const [commitParts] = parts;
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const commit: GitNode.CommitAddress = (GitNode.fromRaw(
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GitNode._gitAddress(...commitParts)
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): any);
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return {type: HAS_TREE_TYPE, commit};
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}
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case "HAS_PARENT": {
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const parts = multiLengthDecode(rest, fail);
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if (parts.length !== 2) throw fail();
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const [childParts, parentParts] = parts;
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const child: GitNode.CommitAddress = (GitNode.fromRaw(
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GitNode._gitAddress(...childParts)
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): any);
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const parent: GitNode.CommitAddress = (GitNode.fromRaw(
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GitNode._gitAddress(...parentParts)
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): any);
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return {type: HAS_PARENT_TYPE, child, parent};
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}
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case "INCLUDES": {
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const parts = multiLengthDecode(rest, fail);
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if (parts.length !== 1) throw fail();
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const [treeEntryParts] = parts;
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const treeEntry: GitNode.TreeEntryAddress = (GitNode.fromRaw(
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GitNode._gitAddress(...treeEntryParts)
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): any);
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return {type: INCLUDES_TYPE, treeEntry};
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}
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case "BECOMES": {
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const parts = multiLengthDecode(rest, fail);
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if (parts.length !== 2) throw fail();
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const [wasParts, becomesParts] = parts;
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const was: GitNode.TreeEntryAddress = (GitNode.fromRaw(
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GitNode._gitAddress(...wasParts)
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): any);
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const becomes: GitNode.TreeEntryAddress = (GitNode.fromRaw(
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GitNode._gitAddress(...becomesParts)
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): any);
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return {type: BECOMES_TYPE, was, becomes};
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}
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case "HAS_CONTENTS": {
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const parts = multiLengthDecode(rest, fail);
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if (parts.length !== 1) throw fail();
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const [treeEntryParts] = parts;
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const treeEntry: GitNode.TreeEntryAddress = (GitNode.fromRaw(
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GitNode._gitAddress(...treeEntryParts)
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): any);
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return {type: HAS_CONTENTS_TYPE, treeEntry};
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}
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default:
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// eslint-disable-next-line no-unused-expressions
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(type: empty);
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throw fail();
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}
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}
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export function toRaw(x: StructuredAddress): RawAddress {
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switch (x.type) {
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case HAS_TREE_TYPE:
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return EdgeAddress.append(
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_Prefix.hasTree,
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...lengthEncode(GitNode.toRaw(x.commit))
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);
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case HAS_PARENT_TYPE:
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return EdgeAddress.append(
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_Prefix.hasParent,
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...lengthEncode(GitNode.toRaw(x.child)),
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...lengthEncode(GitNode.toRaw(x.parent))
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);
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case INCLUDES_TYPE:
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return EdgeAddress.append(
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_Prefix.includes,
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...lengthEncode(GitNode.toRaw(x.treeEntry))
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);
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case BECOMES_TYPE:
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return EdgeAddress.append(
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_Prefix.becomes,
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...lengthEncode(GitNode.toRaw(x.was)),
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...lengthEncode(GitNode.toRaw(x.becomes))
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);
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case HAS_CONTENTS_TYPE:
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return EdgeAddress.append(
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_Prefix.hasContents,
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...lengthEncode(GitNode.toRaw(x.treeEntry))
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);
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default:
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// eslint-disable-next-line no-unused-expressions
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(x.type: empty);
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throw new Error(x.type);
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}
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}
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85
src/v3/plugins/git/edges.test.js
Normal file
85
src/v3/plugins/git/edges.test.js
Normal file
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// @flow
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import {type EdgeAddressT, edgeToParts} from "../../core/graph";
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import {createEdge, fromRaw, toRaw} from "./edges";
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import * as GE from "./edges";
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import * as GN from "./nodes";
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describe("plugins/git/edges", () => {
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const nodeExamples = {
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blob: (): GN.BlobAddress => ({
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type: GN.BLOB_TYPE,
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hash: "f1f2514ca6d7a6a1a0511957021b1995bf9ace1c",
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}),
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commit: (): GN.CommitAddress => ({
|
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type: GN.COMMIT_TYPE,
|
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hash: "3715ddfb8d4c4fd2a6f6af75488c82f84c92ec2f",
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||||
}),
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parentCommit: (): GN.CommitAddress => ({
|
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type: GN.COMMIT_TYPE,
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hash: "69c5aad50eec8f2a0a07c988c3b283a6490eb45b",
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}),
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submoduleCommit: (): GN.SubmoduleCommitAddress => ({
|
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type: GN.SUBMODULE_COMMIT_TYPE,
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submoduleUrl: "https://github.com/sourcecred/example-git-submodule.git",
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commitHash: "29ef158bc982733e2ba429fcf73e2f7562244188",
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||||
}),
|
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tree: (): GN.TreeAddress => ({
|
||||
type: GN.TREE_TYPE,
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||||
hash: "7be3ecfee5314ffa9b2d93fc4377792b2d6d70ed",
|
||||
}),
|
||||
treeEntry: (): GN.TreeEntryAddress => ({
|
||||
type: GN.TREE_ENTRY_TYPE,
|
||||
treeHash: "7be3ecfee5314ffa9b2d93fc4377792b2d6d70ed",
|
||||
name: "science.txt",
|
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}),
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oldTreeEntry: (): GN.TreeEntryAddress => ({
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type: GN.TREE_ENTRY_TYPE,
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treeHash: "de07d6d2b2977734cf39d2b9aff4135eefce3eb7",
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name: "old_science.txt",
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}),
|
||||
};
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const edgeExamples = {
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hasTree: () =>
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createEdge.hasTree(nodeExamples.commit(), nodeExamples.tree()),
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hasParent: () =>
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createEdge.hasParent(nodeExamples.commit(), nodeExamples.parentCommit()),
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includes: () =>
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createEdge.includes(nodeExamples.tree(), nodeExamples.treeEntry()),
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becomes: () =>
|
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createEdge.becomes(nodeExamples.oldTreeEntry(), nodeExamples.treeEntry()),
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hasContents: () =>
|
||||
createEdge.hasContents(nodeExamples.treeEntry(), nodeExamples.blob()),
|
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};
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||||
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||||
describe("createEdge", () => {
|
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Object.keys(edgeExamples).forEach((example) => {
|
||||
it(`works for ${JSON.stringify(example)}`, () => {
|
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const instance = edgeExamples[example]();
|
||||
expect(edgeToParts(instance)).toMatchSnapshot();
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});
|
||||
});
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||||
});
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||||
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||||
describe("`toRaw` after `fromRaw` is identity", () => {
|
||||
Object.keys(edgeExamples).forEach((example) => {
|
||||
it(example, () => {
|
||||
const baseAddress: EdgeAddressT = edgeExamples[example]().address;
|
||||
const instance: GE.RawAddress = (baseAddress: any);
|
||||
expect(toRaw(fromRaw(instance))).toEqual(instance);
|
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});
|
||||
});
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||||
});
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||||
|
||||
describe("`fromRaw` after `toRaw` is identity", () => {
|
||||
Object.keys(edgeExamples).forEach((example) => {
|
||||
it(example, () => {
|
||||
const baseAddress: EdgeAddressT = edgeExamples[example]().address;
|
||||
const instance: GE.RawAddress = (baseAddress: any);
|
||||
const structured: GE.StructuredAddress = fromRaw(instance);
|
||||
expect(fromRaw(toRaw(structured))).toEqual(structured);
|
||||
});
|
||||
});
|
||||
});
|
||||
});
|
||||
@ -48,6 +48,13 @@ export type TreeEntryAddress = {|
|
||||
+name: string,
|
||||
|};
|
||||
|
||||
// A tree entry has contents with one of the following types of
|
||||
// addresses.
|
||||
export type TreeEntryContentsAddress =
|
||||
| BlobAddress
|
||||
| TreeAddress
|
||||
| SubmoduleCommitAddress;
|
||||
|
||||
export type StructuredAddress =
|
||||
| BlobAddress
|
||||
| CommitAddress
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user