renamed GitVersion.js -> GitVersion.ts, added ToolInstaller and ToolLib

src/ToolInstaller.ts

@@ -0,0 +1,128 @@
+import * as path from 'path';
+import * as fs from 'fs';
+import * as os from 'os';
+
+import * as httpm from 'typed-rest-client/HttpClient';
+import { IProxy } from './Interfaces';
+
+export class ToolInstaller {
+    constructor(public utils: IProxy) {
+        this.httpClient = new httpm.HttpClient("ToolInstaller");
+    }
+
+    public async downloadAndInstall(toolName: string, versionSpec: string, checkLatest: boolean, includePrerelease: boolean): Promise<string> {
+        console.log('');
+        console.log('--------------------------');
+        console.log(`Installing ${toolName} version ` + versionSpec);
+        console.log('--------------------------');
+
+        if (this.utils.isExplicitVersion(versionSpec)) {
+            checkLatest = false; // check latest doesn't make sense when explicit version
+        }
+
+        let toolPath: string;
+        if (!checkLatest) {
+            //
+            // Let's try and resolve the version spec locally first
+            //
+            toolPath = this.utils.find(toolName, versionSpec);
+        }
+
+        if (!toolPath) {
+            let version: string;
+            if (this.utils.isExplicitVersion(versionSpec)) {
+                //
+                // Explicit version was specified. No need to query for list of versions.
+                //
+                version = versionSpec;
+            }
+            else {
+                //
+                // Let's query and resolve the latest version for the versionSpec.
+                // If the version is an explicit version (1.1.1 or v1.1.1) then no need to query.
+                // If your tool doesn't offer a mechanism to query,
+                // then it can only support exact version inputs.
+                //
+                version = await this.queryLatestMatch(toolName, versionSpec, includePrerelease);
+                if (!version) {
+                    throw new Error(`Unable to find ${toolName} version '${versionSpec}'.`);
+                }
+
+                //
+                // Check the cache for the resolved version.
+                //
+                toolPath = this.utils.find(toolName, version)
+            }
+            if (!toolPath) {
+                //
+                // Download, extract, cache
+                //
+                toolPath = await this.acquireTool(toolName, version);
+            }
+        }
+
+        //
+        // Prepend the tools path. This prepends the PATH for the current process and
+        // instructs the agent to prepend for each task that follows.
+        //
+        this.utils.debug(`toolPath: ${toolPath}`);
+
+        if (os.platform() != 'win32') {
+            let dotnetRoot = path.dirname(fs.readlinkSync(await this.utils.which("dotnet")));
+            this.utils.exportVariable('DOTNET_ROOT', dotnetRoot);
+        }
+        this.utils.addPath(toolPath);
+
+        return toolPath;
+    }
+
+    private async queryLatestMatch(toolName: string, versionSpec: string, includePrerelease: boolean): Promise<string> {
+        this.utils.debug(`querying tool versions for ${toolName}${versionSpec ? `@${versionSpec}` : ""} ${includePrerelease ? "including pre-releases" : ""}`);
+
+        var downloadPath = `https://api-v2v3search-0.nuget.org/query?q=${encodeURIComponent(toolName.toLowerCase())}&prerelease=${includePrerelease ? "true" : "false"}&semVerLevel=2.0.0`;
+        var res = await this.httpClient.get(downloadPath);
+
+        if (!res || res.message.statusCode != 200)
+        {
+            return null;
+        }
+
+        let body: string = await res.readBody();
+        var data = JSON.parse(body).data;
+
+        const versions = (<Array<{ version: string }>>data[0].versions).map(x => x.version);
+        if (!versions || !versions.length)
+        {
+            return null;
+        }
+
+        this.utils.debug(`got versions: ${versions.join(", ")}`);
+
+        return this.utils.evaluateVersions(versions, versionSpec);
+    }
+
+    private async acquireTool(toolName: string, version: string): Promise<string> {
+
+        let tempDirectory = await this.utils.createTempDir();
+        let args = ["tool", "install", toolName, "--tool-path", tempDirectory];
+
+        if (version) {
+            version = this.utils.cleanVersion(version);
+            args = args.concat(["--version", version]);
+        }
+
+        let result = await this.utils.executeDotNet(args);
+        let status = result.code === 0 ? "success" : "failure";
+        let message = result.code === 0 ? result.stdout : result.stderr;
+
+        this.utils.debug(`tool install result: ${status} ${message}`);
+
+        if (result.code) {
+            throw new Error("Error installing tool");
+        }
+
+        return await this.utils.cacheDir(tempDirectory, toolName, version);
+    }
+
+    private httpClient: httpm.HttpClient;
+}