fix: Cross platform filenames

Support issues with Windows and Linux filename paths being used as keys
in the filesToProjects map.
- store keys as forward slacked files and convert back at the last
  moment

package.json

@@ -2,7 +2,7 @@
   "name": "infracost",
   "displayName": "Infracost",
   "description": "Cloud cost estimates for Terraform in your editor",
-  "version": "0.2.27",
+  "version": "0.2.28",
   "publisher": "Infracost",
   "license": "Apache-2.0",
   "icon": "infracost-logo.png",

src/cli.ts

@@ -107,7 +107,7 @@ export default class CLI {
         INFRACOST_CLI_PLATFORM: 'vscode',
         INFRACOST_NO_COLOR: 'true',
         INFRACOST_SKIP_UPDATE_CHECK: 'true',
-        INFRACOST_GRAPH_EVALUATOR: 'true'
+        INFRACOST_GRAPH_EVALUATOR: 'true',
       },
     });
 

src/lens.ts

@@ -1,15 +1,8 @@
-import {
-  CodeLens,
-  CodeLensProvider,
-  Event,
-  TextDocument,
-} from 'vscode';
+import { CodeLens, CodeLensProvider, Event, TextDocument } from 'vscode';
 import Workspace from './workspace';
-import { cleanFilename } from './utils';
 import logger from './log';
 import { InfracostCommand } from './command';
 import context from './context';
-import path = require('path');
 
 export default class InfracostLensProvider implements CodeLensProvider {
   workspace: Workspace;

src/workspace.ts

@@ -115,7 +115,14 @@ export default class Workspace {
 
     logger.debug(`detected file change for path ${filename}`);
 
-    const projects = this.filesToProjects[filename];
+   const key = filename.split(path.sep).join('/');
+    const projects =
+      this.filesToProjects[
+        Object.keys(this.filesToProjects).find(
+          (k: string) => k.toLowerCase() === key.toLowerCase()
+        ) || key
+      ];
+
     if (projects === undefined) {
       logger.debug(
         `no valid projects found for path ${filename} attempting to locate project for file`
@@ -156,9 +163,13 @@ export default class Workspace {
   // TODO: determine or allow users to switch the project they are using.
   project(filename: string): { [key: string]: Block } {
     const key = filename.split(path.sep).join('/');
-     const projectKey = this.filesToProjects[Object.keys(this.filesToProjects).find((k: string) => k.toLowerCase() === key.toLowerCase()) || key];
-
-
+    const projectKey =
+      this.filesToProjects[
+        Object.keys(this.filesToProjects).find(
+          (k: string) => k.toLowerCase() === key.toLowerCase()
+        ) || key
+      ];
+
     if (projectKey && Object.keys(projectKey).length > 0) {
       const project = Object.keys(projectKey)[0];
       return this.projects[project].blocks;