ssh: Add --reason

This is necessary for any orgs that require reasons, but also just
useful in general.

Fixes ENG-1670.

src/commands/__tests__/__snapshots__/ssh.test.ts.snap

@@ -1,5 +1,23 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`ssh ephemeral access should call p0 request with reason arg: args 1`] = `
+{
+  "$0": "/Users/nathanbrahms/dev/p0cli/node_modules/.bin/jest",
+  "_": [
+    "ssh",
+  ],
+  "arguments": [
+    "ssh",
+    "some-instance",
+    "--provider",
+    "aws",
+    "--reason",
+    "reason",
+  ],
+  "wait": true,
+}
+`;
+
 exports[`ssh ephemeral access should call ssm: stderr 1`] = `
 [
   [
@@ -17,6 +35,24 @@ exports[`ssh ephemeral access should call ssm: stderr 1`] = `
 ]
 `;
 
+exports[`ssh persistent access should call p0 request with reason arg: args 1`] = `
+{
+  "$0": "/Users/nathanbrahms/dev/p0cli/node_modules/.bin/jest",
+  "_": [
+    "ssh",
+  ],
+  "arguments": [
+    "ssh",
+    "some-instance",
+    "--provider",
+    "aws",
+    "--reason",
+    "reason",
+  ],
+  "wait": true,
+}
+`;
+
 exports[`ssh persistent access should call ssm: stderr 1`] = `
 [
   [

src/commands/__tests__/ssh.test.ts

@@ -57,6 +57,12 @@ describe("ssh", () => {
       });
     });
 
+    it("should call p0 request with reason arg", async () => {
+      void sshCommand(yargs()).parse(`ssh some-instance --reason reason`);
+      await sleep(100);
+      expect(mockFetchCommand.mock.calls[0][1]).toMatchSnapshot("args");
+    });
+
     it("should wait for access grant", async () => {
       const promise = sshCommand(yargs()).parse(`ssh some-instance`);
       const wait = sleep(100);

src/commands/ssh.ts

@@ -32,6 +32,7 @@ export type SshCommandArgs = {
   command?: string;
   L?: string; // port forwarding option
   arguments: string[];
+  reason?: string;
 };
 
 // Matches strings with the pattern "digits:digits" (e.g. 1234:5678)
@@ -75,6 +76,11 @@ export const sshCommand = (yargs: yargs.Argv) =>
           describe:
             // the order of the sockets in the address matches the ssh man page
             "Forward a local port to the remote host; `local_socket:remote_socket`",
+        })
+        // Match `p0 request --reason`
+        .option("reason", {
+          describe: "Reason access is needed",
+          type: "string",
         }),
     guard(ssh)
   );
@@ -149,7 +155,13 @@ const ssh = async (args: yargs.ArgumentsCamelCase<SshCommandArgs>) => {
   const response = await request(
     {
       ...pick(args, "$0", "_"),
-      arguments: ["ssh", args.destination, "--provider", "aws"],
+      arguments: [
+        "ssh",
+        args.destination,
+        "--provider",
+        "aws",
+        ...(args.reason ? ["--reason", args.reason] : []),
+      ],
       wait: true,
     },
     authn,