Fallback to compilation from source if wheel installation fails

Tools/WinML-Dashbaord/public/requirements-other.txt

@@ -1 +0,0 @@
--e git+https://github.com/apple/coremltools@ad3e24d875972cd2242b531e80d99d92ae215dec#egg=coremltools

Tools/WinML-Dashbaord/public/requirements.txt

@@ -1,3 +1,4 @@
+-e git+https://github.com/apple/coremltools@ad3e24d875972cd2242b531e80d99d92ae215dec#egg=coremltools
 h5py==2.8.0
 Keras==2.2.2
 Keras-Applications==1.0.4

Tools/WinML-Dashbaord/src/view/convert/View.tsx

@@ -96,9 +96,14 @@ export default class ConvertView extends React.Component<{}, IComponentState> {
                 this.setState({ currentStep: Step.InstallingRequirements });
                 const platformRequirements = packagedFile(`requirements-${process.platform}.txt`)
                 if (fs.existsSync(platformRequirements)) {
-                    await pip(['install', '-r', platformRequirements], this.outputListener);
-                } else {
-                    await pip(['install', '-r', packagedFile(`requirements-other.txt`)], this.outputListener);
+                    try {
+                        await pip(['install', '-r', platformRequirements], this.outputListener);
+                    } catch (e) {
+                        // If the installation of any compiled wheel fails (e.g. not compiled for this version of Python),
+                        // fallback to compilation from source code through requirements.txt
+                        // tslint:disable-next-line:no-console
+                        console.error(e);
+                    }
                 }
                 await pip(['install', '-r', packagedFile('requirements.txt')], this.outputListener);
                 this.setState({ currentStep: Step.Idle });