What causes "repos root is immutable; use {} or {} or set {}=1 to override" in nikivdev/code?

Use the default repos root or default code root instead of a custom path

repos root is immutable; use

Error message

repos root is immutable; use {} or {} or set {}=1 to override

What it means

The repos-root guard in src/repos.rs refuses to operate on a repository root other than the two built-in defaults (DEFAULT_REPOS_ROOT or DEFAULT_CODE_ROOT) unless an explicit override is enabled. This protects users from accidentally cloning, syncing, or mutating repos in an arbitrary directory that may not be managed by this tool.

Solutions

Use the default repos root or default code root instead of a custom path
Set the REPOS_ROOT_OVERRIDE_ENV environment variable to 1 to explicitly allow a non-default root
Verify the path is correctly expanded (config::expand_path) and matches one of the two allowed defaults

Example fix

// before
repos_cmd(root: PathBuf::from("/tmp/my-repos"), ...)
// after
export REPOS_ROOT_OVERRIDE=1  # or pass the default root
repos_cmd(root: config::expand_path(DEFAULT_REPOS_ROOT), ...)

Defensive patterns

Strategy: validation

Validate before calling

fn is_allowed_repos_root(root: &Path) -> bool {
    let d = config::expand_path(DEFAULT_REPOS_ROOT);
    let c = config::expand_path(DEFAULT_CODE_ROOT);
    root == d || root == c || std::env::var(REPOS_ROOT_OVERRIDE_ENV).as_deref() == Ok("1")
}
if !is_allowed_repos_root(&root) { eprintln!("root not allowed"); return; }

Try / catch

match do_repos_op(&root) {
    Err(e) if e.to_string().contains("repos root is immutable") => eprintln!("pass the default root or set the override env var"),
    other => other?,
}

Prevention

Always derive the root from config::expand_path(DEFAULT_*) instead of hardcoding paths
Set REPOS_ROOT_OVERRIDE_ENV=1 only in throwaway/dev environments
Document the allowed roots in your CI scripts

When it happens

Trigger: Calling a repos command with a custom root path argument that matches neither config::expand_path(DEFAULT_REPOS_ROOT) nor config::expand_path(DEFAULT_CODE_ROOT) while the REPOS_ROOT_OVERRIDE_ENV environment variable is unset.

Common situations: Developers passing --root or a positional path pointing at a scratch/personal directory; CI systems overriding the root without also setting the override env var; expansions of '~' differing from the configured default path.

Related errors

AI-assisted analysis of nikivdev/code@a747e741ae (2026-09-01). Data as JSON: /api/errors/9f643b7fc3a84ffc. Report an issue: GitHub.

Appendix: source

Thrown at src/repos.rs:1773

    Ok(RepoRef {
        owner: owner.to_string(),
        repo: repo.to_string(),
    })
}

pub(crate) fn normalize_root(raw: &str) -> Result<PathBuf> {
    let expanded = config::expand_path(raw);
    let cwd = std::env::current_dir().context("failed to resolve current directory")?;
    let root = if expanded.is_absolute() {
        expanded
    } else {
        cwd.join(expanded)
    };

    let default_repos_root = config::expand_path(DEFAULT_REPOS_ROOT);
    let default_code_root = config::expand_path(DEFAULT_CODE_ROOT);
    if root != default_repos_root && root != default_code_root && !repos_root_override_enabled() {
        bail!(
            "repos root is immutable; use {} or {} or set {}=1 to override",
            default_repos_root.display(),
            default_code_root.display(),
            REPOS_ROOT_OVERRIDE_ENV
        );
    }

    Ok(root)
}

fn repos_root_override_enabled() -> bool {
    match std::env::var(REPOS_ROOT_OVERRIDE_ENV) {
        Ok(value) => {
            let trimmed = value.trim();
            !trimmed.is_empty() && trimmed != "0"
        }
        Err(_) => false,
    }

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