Remove the bin_paths and fetch the solidity release list from github repo

5 files changed, 29 insertions, 59 deletions

diff --git a/packages/sol-compiler/CHANGELOG.json b/packages/sol-compiler/CHANGELOG.json
index a0d2250aa..977699ad6 100644
--- a/packages/sol-compiler/CHANGELOG.json
+++ b/packages/sol-compiler/CHANGELOG.json
@@ -9,6 +9,10 @@
             {
                 "note": "Fix a bug when opts could not be undefined",
                 "pr": "TODO"
+            },
+            {
+                "note": "Remove `bin_paths` and fetch the list of soliidty compilers from github",
+                "pr": "TODO"
             }
         ]
     },
diff --git a/packages/sol-compiler/src/compiler.ts b/packages/sol-compiler/src/compiler.ts
index 686ba4f82..45608eb55 100644
--- a/packages/sol-compiler/src/compiler.ts
+++ b/packages/sol-compiler/src/compiler.ts
@@ -21,7 +21,6 @@ import * as semver from 'semver';
 import solc = require('solc');
 
 import { compilerOptionsSchema } from './schemas/compiler_options_schema';
-import { binPaths } from './solc/bin_paths';
 import {
     addHexPrefixToContractBytecode,
     compileDockerAsync,
@@ -29,6 +28,7 @@ import {
     createDirIfDoesNotExistAsync,
     getContractArtifactIfExistsAsync,
     getDependencyNameToPackagePath,
+    getSolcJSReleasesAsync,
     getSourcesWithDependencies,
     getSourceTreeHash,
     makeContractPathsRelative,
@@ -211,6 +211,7 @@ export class Compiler {
         // map contract paths to data about them for later verification and persistence
         const contractPathToData: ContractPathToData = {};
 
+        const solcJSReleases = await getSolcJSReleasesAsync();
         const resolvedContractSources = [];
         for (const contractName of contractNames) {
             const spyResolver = new SpyResolver(this._resolver);
@@ -226,7 +227,7 @@ export class Compiler {
             }
             contractPathToData[contractSource.path] = contractData;
             const solcVersion = _.isUndefined(this._solcVersionIfExists)
-                ? semver.maxSatisfying(_.keys(binPaths), parseSolidityVersionRange(contractSource.source))
+                ? semver.maxSatisfying(_.keys(solcJSReleases), parseSolidityVersionRange(contractSource.source))
                 : this._solcVersionIfExists;
             const isFirstContractWithThisVersion = _.isUndefined(versionToInputs[solcVersion]);
             if (isFirstContractWithThisVersion) {
@@ -272,7 +273,7 @@ export class Compiler {
                 fullSolcVersion = versionCommandOutputParts[versionCommandOutputParts.length - 1].trim();
                 compilerOutput = await compileDockerAsync(solcVersion, input.standardInput);
             } else {
-                fullSolcVersion = binPaths[solcVersion];
+                fullSolcVersion = solcJSReleases[solcVersion];
                 compilerOutput = await compileSolcJSAsync(solcVersion, input.standardInput);
             }
             if (!_.isUndefined(compilerOutput.errors)) {
diff --git a/packages/sol-compiler/src/solc/bin_paths.ts b/packages/sol-compiler/src/solc/bin_paths.ts
deleted file mode 100644
index b653c0926..000000000
--- a/packages/sol-compiler/src/solc/bin_paths.ts
+++ /dev/null
@@ -1,52 +0,0 @@
-export interface BinaryPaths {
-    [key: string]: string;
-}
-
-export const binPaths: BinaryPaths = {
-    '0.5.2': 'soljson-v0.5.2+commit.1df8f40c.js',
-    '0.5.1': 'soljson-v0.5.1+commit.c8a2cb62.js',
-    '0.5.0': 'soljson-v0.5.0+commit.1d4f565a.js',
-    '0.4.25': 'soljson-v0.4.25+commit.59dbf8f1.js',
-    '0.4.24': 'soljson-v0.4.24+commit.e67f0147.js',
-    '0.4.23': 'soljson-v0.4.23+commit.124ca40d.js',
-    '0.4.22': 'soljson-v0.4.22+commit.4cb486ee.js',
-    '0.4.21': 'soljson-v0.4.21+commit.dfe3193c.js',
-    '0.4.20': 'soljson-v0.4.20+commit.3155dd80.js',
-    '0.4.19': 'soljson-v0.4.19+commit.c4cbbb05.js',
-    '0.4.18': 'soljson-v0.4.18+commit.9cf6e910.js',
-    '0.4.17': 'soljson-v0.4.17+commit.bdeb9e52.js',
-    '0.4.16': 'soljson-v0.4.16+commit.d7661dd9.js',
-    '0.4.15': 'soljson-v0.4.15+commit.bbb8e64f.js',
-    '0.4.14': 'soljson-v0.4.14+commit.c2215d46.js',
-    '0.4.13': 'soljson-v0.4.13+commit.fb4cb1a.js',
-    '0.4.12': 'soljson-v0.4.12+commit.194ff033.js',
-    '0.4.11': 'soljson-v0.4.11+commit.68ef5810.js',
-    '0.4.10': 'soljson-v0.4.10+commit.f0d539ae.js',
-    '0.4.9': 'soljson-v0.4.9+commit.364da425.js',
-    '0.4.8': 'soljson-v0.4.8+commit.60cc1668.js',
-    '0.4.7': 'soljson-v0.4.7+commit.822622cf.js',
-    '0.4.6': 'soljson-v0.4.6+commit.2dabbdf0.js',
-    '0.4.5': 'soljson-v0.4.5+commit.b318366e.js',
-    '0.4.4': 'soljson-v0.4.4+commit.4633f3de.js',
-    '0.4.3': 'soljson-v0.4.3+commit.2353da71.js',
-    '0.4.2': 'soljson-v0.4.2+commit.af6afb04.js',
-    '0.4.1': 'soljson-v0.4.1+commit.4fc6fc2c.js',
-    '0.4.0': 'soljson-v0.4.0+commit.acd334c9.js',
-    '0.3.6': 'soljson-v0.3.6+commit.3fc68da.js',
-    '0.3.5': 'soljson-v0.3.5+commit.5f97274.js',
-    '0.3.4': 'soljson-v0.3.4+commit.7dab890.js',
-    '0.3.3': 'soljson-v0.3.3+commit.4dc1cb1.js',
-    '0.3.2': 'soljson-v0.3.2+commit.81ae2a7.js',
-    '0.3.1': 'soljson-v0.3.1+commit.c492d9b.js',
-    '0.3.0': 'soljson-v0.3.0+commit.11d6736.js',
-    '0.2.2': 'soljson-v0.2.2+commit.ef92f56.js',
-    '0.2.1': 'soljson-v0.2.1+commit.91a6b35.js',
-    '0.2.0': 'soljson-v0.2.0+commit.4dc2445.js',
-    '0.1.7': 'soljson-v0.1.7+commit.b4e666c.js',
-    '0.1.6': 'soljson-v0.1.6+commit.d41f8b7.js',
-    '0.1.5': 'soljson-v0.1.5+commit.23865e3.js',
-    '0.1.4': 'soljson-v0.1.4+commit.5f6c3cd.js',
-    '0.1.3': 'soljson-v0.1.3+commit.28f561.js',
-    '0.1.2': 'soljson-v0.1.2+commit.d0d36e3.js',
-    '0.1.1': 'soljson-v0.1.1+commit.6ff4cd6.js',
-};
diff --git a/packages/sol-compiler/src/utils/compiler.ts b/packages/sol-compiler/src/utils/compiler.ts
index dffd07b1d..34aa1a3b8 100644
--- a/packages/sol-compiler/src/utils/compiler.ts
+++ b/packages/sol-compiler/src/utils/compiler.ts
@@ -9,11 +9,9 @@ import * as path from 'path';
 import * as requireFromString from 'require-from-string';
 import * as solc from 'solc';
 
-import { binPaths } from '../solc/bin_paths';
-
 import { constants } from './constants';
 import { fsWrapper } from './fs_wrapper';
-import { CompilationError } from './types';
+import { BinaryPaths, CompilationError } from './types';
 
 /**
  * Gets contract data on network or returns if an artifact does not exist.
@@ -119,6 +117,20 @@ export function parseDependencies(contractSource: ContractSource): string[] {
     return dependencies;
 }
 
+let solcJSReleasesCache: BinaryPaths | undefined;
+
+/**
+ * Fetches the list of available solidity compilers
+ */
+export async function getSolcJSReleasesAsync(): Promise<BinaryPaths> {
+    if (_.isUndefined(solcJSReleasesCache)) {
+        const versionList = await fetch('https://ethereum.github.io/solc-bin/bin/list.json');
+        const versionListJSON = await versionList.json();
+        solcJSReleasesCache = versionListJSON.releases;
+    }
+    return solcJSReleasesCache as BinaryPaths;
+}
+
 /**
  * Compiles the contracts and prints errors/warnings
  * @param solcVersion Version of a solc compiler
@@ -319,7 +331,8 @@ function recursivelyGatherDependencySources(
  * @param solcVersion The compiler version. e.g. 0.5.0
  */
 export async function getSolcJSAsync(solcVersion: string): Promise<solc.SolcInstance> {
-    const fullSolcVersion = binPaths[solcVersion];
+    const solcJSReleases = await getSolcJSReleasesAsync();
+    const fullSolcVersion = solcJSReleases[solcVersion];
     if (_.isUndefined(fullSolcVersion)) {
         throw new Error(`${solcVersion} is not a known compiler version`);
     }
diff --git a/packages/sol-compiler/src/utils/types.ts b/packages/sol-compiler/src/utils/types.ts
index 64328899d..f756c51bb 100644
--- a/packages/sol-compiler/src/utils/types.ts
+++ b/packages/sol-compiler/src/utils/types.ts
@@ -13,6 +13,10 @@ export interface ContractSourceData {
     [contractName: string]: ContractSpecificSourceData;
 }
 
+export interface BinaryPaths {
+    [key: string]: string;
+}
+
 export interface ContractSpecificSourceData {
     solcVersionRange: string;
     sourceHash: Buffer;