refactor: dedupe cli config cron and install flows

src/infra/install-from-npm-spec.ts

@@ -0,0 +1,38 @@
+import type { NpmIntegrityDriftPayload } from "./npm-integrity.js";
+import {
+  finalizeNpmSpecArchiveInstall,
+  installFromNpmSpecArchiveWithInstaller,
+  type NpmSpecArchiveFinalInstallResult,
+} from "./npm-pack-install.js";
+import { validateRegistryNpmSpec } from "./npm-registry-spec.js";
+
+export async function installFromValidatedNpmSpecArchive<
+  TResult extends { ok: boolean },
+  TArchiveInstallParams extends { archivePath: string },
+>(params: {
+  spec: string;
+  timeoutMs: number;
+  tempDirPrefix: string;
+  expectedIntegrity?: string;
+  onIntegrityDrift?: (payload: NpmIntegrityDriftPayload) => boolean | Promise<boolean>;
+  warn?: (message: string) => void;
+  installFromArchive: (params: TArchiveInstallParams) => Promise<TResult>;
+  archiveInstallParams: Omit<TArchiveInstallParams, "archivePath">;
+}): Promise<NpmSpecArchiveFinalInstallResult<TResult>> {
+  const spec = params.spec.trim();
+  const specError = validateRegistryNpmSpec(spec);
+  if (specError) {
+    return { ok: false, error: specError };
+  }
+  const flowResult = await installFromNpmSpecArchiveWithInstaller({
+    tempDirPrefix: params.tempDirPrefix,
+    spec,
+    timeoutMs: params.timeoutMs,
+    expectedIntegrity: params.expectedIntegrity,
+    onIntegrityDrift: params.onIntegrityDrift,
+    warn: params.warn,
+    installFromArchive: params.installFromArchive,
+    archiveInstallParams: params.archiveInstallParams,
+  });
+  return finalizeNpmSpecArchiveInstall(flowResult);
+}