Split into modules and reorganize

src/InstallBinCommand.ts

@@ -0,0 +1,84 @@
+import { Command } from "clipanion";
+import { Filename, npath, ppath, xfs } from "@yarnpkg/fslib";
+import { getPnpPath } from "@yarnpkg/plugin-pnp";
+
+import {
+  CommandContext,
+  Configuration,
+  Project,
+  StreamReport,
+} from "@yarnpkg/core";
+
+import binWrapperNodeModulesTmpl from "./tmpl/bin-wrapper-node-modules.sh.in";
+import binWrapperPnpTmpl from "./tmpl/bin-wrapper-pnp.sh.in";
+
+const supportedLinkers = [`pnp`, `node-modules`];
+
+// Internal command that creates wrappers for binaries.
+// Used inside the Nix install phase.
+export default class InstallBinCommand extends Command<CommandContext> {
+  @Command.String()
+  binDir: string = ``;
+
+  @Command.Path(`nixify`, `install-bin`)
+  async execute() {
+    const configuration = await Configuration.find(
+      this.context.cwd,
+      this.context.plugins
+    );
+    const { project, workspace } = await Project.find(
+      configuration,
+      this.context.cwd
+    );
+
+    const report = await StreamReport.start(
+      { configuration, stdout: this.context.stdout },
+      async (report) => {
+        if (!workspace || workspace.manifest.bin.size === 0) {
+          return;
+        }
+
+        let nodeLinker = configuration.get(`nodeLinker`);
+        if (!supportedLinkers.includes(nodeLinker)) {
+          nodeLinker = `node-modules`;
+          report.reportWarning(
+            0,
+            `The nodeLinker ${nodeLinker} is not supported - executables may have trouble finding dependencies`
+          );
+        }
+
+        const binDir = npath.toPortablePath(this.binDir);
+        const pnpPath = getPnpPath(project).main;
+        for (const [name, scriptInput] of workspace.manifest.bin) {
+          const binPath = ppath.join(binDir, name as Filename);
+          const scriptPath = ppath.join(
+            project.cwd,
+            npath.toPortablePath(scriptInput)
+          );
+
+          let script;
+          switch (nodeLinker) {
+            case `pnp`:
+              script = binWrapperPnpTmpl
+                .replace(`@@PNP_PATH@@`, pnpPath)
+                .replace(`@@SCRIPT_PATH@@`, scriptPath);
+              break;
+            case `node-modules`:
+              script = binWrapperNodeModulesTmpl.replace(
+                `@@SCRIPT_PATH@@`,
+                scriptPath
+              );
+              break;
+            default:
+              throw Error(`Invalid nodeLinker ${nodeLinker}`);
+          }
+
+          xfs.writeFileSync(binPath, script);
+          xfs.chmodSync(binPath, 0o755);
+        }
+      }
+    );
+
+    return report.exitCode();
+  }
+}