refactor: setup context (#325)

Co-authored-by: CrazyMax <crazy-max@users.noreply.github.com>

src/goreleaser.ts

@@ -0,0 +1,80 @@
+import * as path from 'path';
+import * as util from 'util';
+import * as context from './context';
+import * as github from './github';
+import * as core from '@actions/core';
+import * as tc from '@actions/tool-cache';
+
+export async function install(distribution: string, version: string): Promise<string> {
+  const release: github.GitHubRelease | null = await github.getRelease(distribution, version);
+  if (!release) {
+    throw new Error(`Cannot find GoReleaser ${version} release`);
+  }
+
+  const filename = getFilename(distribution);
+  const downloadUrl = util.format(
+    'https://github.com/goreleaser/%s/releases/download/%s/%s',
+    distribution,
+    release.tag_name,
+    filename
+  );
+
+  core.info(`Downloading ${downloadUrl}`);
+  const downloadPath: string = await tc.downloadTool(downloadUrl);
+  core.debug(`Downloaded to ${downloadPath}`);
+
+  core.info('Extracting GoReleaser');
+  let extPath: string;
+  if (context.osPlat == 'win32') {
+    extPath = await tc.extractZip(downloadPath);
+  } else {
+    extPath = await tc.extractTar(downloadPath);
+  }
+  core.debug(`Extracted to ${extPath}`);
+
+  const cachePath: string = await tc.cacheDir(extPath, 'goreleaser-action', release.tag_name.replace(/^v/, ''));
+  core.debug(`Cached to ${cachePath}`);
+
+  const exePath: string = path.join(cachePath, context.osPlat == 'win32' ? 'goreleaser.exe' : 'goreleaser');
+  core.debug(`Exe path is ${exePath}`);
+
+  return exePath;
+}
+
+export const distribSuffix = (distribution: string): string => {
+  return isPro(distribution) ? '-pro' : '';
+};
+
+export const isPro = (distribution: string): boolean => {
+  return distribution === 'goreleaser-pro';
+};
+
+const getFilename = (distribution: string): string => {
+  let arch: string;
+  switch (context.osArch) {
+    case 'x64': {
+      arch = 'x86_64';
+      break;
+    }
+    case 'x32': {
+      arch = 'i386';
+      break;
+    }
+    case 'arm': {
+      const arm_version = (process.config.variables as any).arm_version;
+      arch = arm_version ? 'armv' + arm_version : 'arm';
+      break;
+    }
+    default: {
+      arch = context.osArch;
+      break;
+    }
+  }
+  if (context.osPlat == 'darwin') {
+    arch = 'all';
+  }
+  const platform: string = context.osPlat == 'win32' ? 'Windows' : context.osPlat == 'darwin' ? 'Darwin' : 'Linux';
+  const ext: string = context.osPlat == 'win32' ? 'zip' : 'tar.gz';
+  const suffix: string = distribSuffix(distribution);
+  return util.format('goreleaser%s_%s_%s.%s', suffix, platform, arch, ext);
+};