Add command for checking if CODEOWNERS are up-to-date

Author: Kobzol

src/ci.rs

@@ -11,6 +11,20 @@ pub fn generate_codeowners_file() -> anyhow::Result<()> {
     Ok(())
 }
 
+/// Check if `.github/CODEOWNERS` are up-to-date, based on the
+/// `infra-admins.toml` file.
+pub fn check_codeowners() -> anyhow::Result<()> {
+    let admins = load_infra_admins()?;
+    let expected_codeowners = generate_codeowners_content(admins);
+    let actual_codeowners =
+        std::fs::read_to_string(codeowners_path()).context("cannot read CODEOWNERS")?;
+    if expected_codeowners != actual_codeowners {
+        return Err(anyhow::anyhow!("CODEOWNERS content is not up-to-date. Regenerate it using `cargo run ci generate-codeowners`."));
+    }
+
+    Ok(())
+}
+
 fn generate_codeowners_content(admins: Vec<String>) -> String {
     use std::fmt::Write;
 

src/main.rs

@@ -16,7 +16,7 @@ use data::Data;
 use schema::{Email, Team, TeamKind};
 use zulip::ZulipApi;
 
-use crate::ci::generate_codeowners_file;
+use crate::ci::{check_codeowners, generate_codeowners_file};
 use crate::schema::RepoPermission;
 use anyhow::{bail, format_err, Error};
 use log::{error, info, warn};
@@ -121,6 +121,8 @@ enum Cli {
 enum CiOpts {
     #[structopt(help = "Generate the .github/CODEOWNERS file")]
     GenerateCodeowners,
+    #[structopt(help = "Check if the .github/CODEOWNERS file is up-to-date")]
+    CheckCodeowners,
 }
 
 fn main() {
@@ -434,6 +436,7 @@ fn run() -> Result<(), Error> {
         }
         Cli::Ci(opts) => match opts {
             CiOpts::GenerateCodeowners => generate_codeowners_file()?,
+            CiOpts::CheckCodeowners => check_codeowners()?,
         },
     }