fix(compat-check): handle cli prerelease case

Author: acburdine

lib/tasks/yarn-install.js

@@ -31,7 +31,7 @@ const subTasks = {
             return Promise.reject(new errors.SystemError(`Ghost v${ctx.version} is not compatible with the current Node version.`));
         }
 
-        if (data.engines && data.engines.cli && !semver.satisfies(cliPackage.version, data.engines.cli)) {
+        if (data.engines && data.engines.cli && !semver.prerelease(cliPackage.version) && !semver.satisfies(cliPackage.version, data.engines.cli)) {
             return Promise.reject(new errors.SystemError(`Ghost v${ctx.version} is not compatible with this version of the CLI.`));
         }
 

test/unit/tasks/yarn-install-spec.js

@@ -195,7 +195,8 @@ describe('Unit: Tasks > yarn-install', function () {
             };
             const yarnStub = sinon.stub().resolves({stdout: JSON.stringify(data)});
             const dist = proxyquire(modulePath, {
-                '../utils/yarn': yarnStub
+                '../utils/yarn': yarnStub,
+                '../../package.json': {version: '1.0.0'}
             }).subTasks.dist;
             const ctx = {version: '1.5.0'};
 
@@ -209,6 +210,31 @@ describe('Unit: Tasks > yarn-install', function () {
             });
         });
 
+        it('resolves if Ghost version isn\'t compatible with CLI version, but CLI is a prerelease version', function () {
+            const data = {
+                data: {
+                    engines: {node: process.versions.node, cli: '^1.9.0'},
+                    dist: {shasum: 'asdf1234', tarball: 'something.tgz'}
+                }
+            };
+            const yarnStub = sinon.stub().resolves({stdout: JSON.stringify(data)});
+            const dist = proxyquire(modulePath, {
+                '../utils/yarn': yarnStub,
+                '../../package.json': {version: '1.10.0-beta.0'}
+            }).subTasks.dist;
+            const ctx = {version: '1.5.0'};
+
+            return dist(ctx).then(() => {
+                expect(yarnStub.calledOnce).to.be.true;
+                expect(yarnStub.calledWithExactly(['info', '[email protected]', '--json'])).to.be.true;
+                expect(ctx).to.deep.equal({
+                    version: '1.5.0',
+                    shasum: 'asdf1234',
+                    tarball: 'something.tgz'
+                });
+            });
+        });
+
         it('adds shasum and tarball values to context', function () {
             const data = {data: {dist: {shasum: 'asdf1234', tarball: 'something.tgz'}}};
             const yarnStub = sinon.stub().resolves({stdout: JSON.stringify(data)});