Add helper to translate old style versions to semver

Author: axic

test/index.js

@@ -1,3 +1,4 @@
+require('./translate.js');
 require('./package.js');
 require('./abi.js');
 require('./cli.js');

test/translate.js

@@ -0,0 +1,37 @@
+const tape = require('tape');
+const translate = require('../translate.js');
+const versionToSemver = translate.versionToSemver;
+
+tape('Version string to Semver translator', function (t) {
+  t.test('Only numbers', function (st) {
+    st.equal(versionToSemver('0.1.0'), '0.1.0');
+    st.end();
+  });
+  t.test('New style release (semver)', function (st) {
+    st.equal(versionToSemver('0.4.5+commit.b318366e.Emscripten.clang'), '0.4.5+commit.b318366e.Emscripten.clang');
+    st.end();
+  });
+  t.test('New style nightly (semver)', function (st) {
+    st.equal(versionToSemver('0.4.20-nightly.2018.2.13+commit.27ef9794.Emscripten.clang'), '0.4.20-nightly.2018.2.13+commit.27ef9794.Emscripten.clang');
+    st.end();
+  });
+  t.test('Old style 0.1.1', function (st) {
+    st.equal(versionToSemver('0.1.1-6ff4cd6b/RelWithDebInfo-Emscripten/clang/int'), '0.1.1+commit.6ff4cd6b');
+    st.end();
+  });
+  t.test('Old style 0.2.0', function (st) {
+    st.equal(
+      versionToSemver('0.2.0-e7098958/.-Emscripten/clang/int linked to libethereum-1.1.1-bbb80ab0/.-Emscripten/clang/int'),
+      '0.2.0+commit.e7098958'
+    );
+    st.end();
+  });
+  t.test('Old style 0.3.5', function (st) {
+    st.equal(versionToSemver('0.3.5-371690f0/Release-Emscripten/clang/Interpreter'), '0.3.5+commit.371690f0');
+    st.end();
+  });
+  t.test('Old style 0.3.6', function (st) {
+    st.equal(versionToSemver('0.3.6-3fc68da5/Release-Emscripten/clang'), '0.3.6+commit.3fc68da5');
+    st.end();
+  });
+});

translate.js

@@ -1,3 +1,19 @@
+/// Translate old style version numbers to semver.
+/// Old style: 0.3.6-3fc68da5/Release-Emscripten/clang
+///            0.3.5-371690f0/Release-Emscripten/clang/Interpreter
+///            0.2.0-e7098958/.-Emscripten/clang/int linked to libethereum-1.1.1-bbb80ab0/.-Emscripten/clang/int
+///            0.1.1-6ff4cd6b/RelWithDebInfo-Emscripten/clang/int
+/// New style: 0.4.5+commit.b318366e.Emscripten.clang
+function versionToSemver (version) {
+  // FIXME: parse more detail, but this is a good start
+  var parsed = version.match(/^([0-9]+\.[0-9]+\.[0-9]+)-([0-9a-f]{8})\/.*$/);
+  if (parsed) {
+    return parsed[1] + '+commit.' + parsed[2];
+  }
+  // assume it is already semver compatible
+  return version;
+}
+
 function translateErrors (ret, errors) {
   for (var error in errors) {
     var type = 'error';
@@ -118,5 +134,6 @@ function translateJsonCompilerOutput (output) {
 }
 
 module.exports = {
+  versionToSemver: versionToSemver,
   translateJsonCompilerOutput: translateJsonCompilerOutput
 };