monochromatic-git-policy-cli 0.5.27

Repository-owned Git policy wrapper: forwards Git commands and checks commits against configured policies.
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//! Controls for the push retry's schedule: the pauses grow and stop growing, a variable sets the first pause, a plan is
//! per branch, and only the conflict report is final.

use super::*;
use crate::work_item::WorkKind;

fn item(branch: &str) -> WorkItem {
    return WorkItem {
        kind: WorkKind::Push,
        repository: String::from("/srv/repo"),
        git_dir: String::from("/srv/repo/.git"),
        branch_ref: branch.to_owned(),
        oid: String::from("0123456789abcdef0123456789abcdef01234567"),
        parent: String::new(),
        created: String::from("2026-11-03T05:40:00.000Z"),
        tries: 0,
    };
}

/// Each pause is twice the one before, from the first, up to the longest.
#[test]
fn the_pauses_double_and_stop_at_the_longest() {
    let first: Duration = Duration::from_secs(10);
    let pauses: Vec<Duration> = (1..=4).map(|attempt| { return pause_before(attempt, first); }).collect();
    assert_eq!(pauses, vec![first, first * 2, first * 4, first * 8]);
    assert_eq!(pause_before(1_000, first), LONGEST_PAUSE);
    assert_eq!(pause_before(u32::MAX, first), LONGEST_PAUSE);
    assert!(pause_before(0, first) == first, "a try number of zero is the first");
}

/// The variable sets the first pause in whole seconds; anything else is the default, and never longer than the longest.
#[test]
fn the_variable_sets_the_first_pause() {
    assert_eq!(first_pause_from(None), FIRST_PAUSE);
    assert_eq!(first_pause_from(Some(std::ffi::OsStr::new("3"))), Duration::from_secs(3));
    for unusable in ["0", "-1", "1.5", "soon", ""] {
        assert_eq!(first_pause_from(Some(std::ffi::OsStr::new(unusable))), FIRST_PAUSE, "{unusable:?}");
    }
    assert_eq!(first_pause_from(Some(std::ffi::OsStr::new("99999"))), LONGEST_PAUSE);
}

/// A plan is due after its pause and not before, replaces an earlier plan of its branch, and belongs to its Git directory.
#[test]
fn a_plan_is_per_branch_and_due_after_its_pause() {
    let mut retries: PushRetries = PushRetries::with_first_pause(Duration::from_secs(10));
    let now: Instant = Instant::now();
    let here: &Path = Path::new("/srv/repo/.git");
    let elsewhere: &Path = Path::new("/srv/other/.git");
    assert_eq!(retries.schedule(here, &item("refs/heads/main"), 1, now), Duration::from_secs(10));
    assert_eq!(retries.schedule(here, &item("refs/heads/main"), 2, now), Duration::from_secs(20), "the same branch has one plan");
    retries.schedule(here, &item("refs/heads/topic"), 1, now);
    assert_eq!(retries.next_wait(here, now), Some(Duration::from_secs(10)));
    assert_eq!(retries.next_wait(elsewhere, now), None);
    assert!(retries.take_due(here, now + Duration::from_secs(9)).is_empty());
    assert!(retries.take_due(elsewhere, now + Duration::from_secs(60)).is_empty());
    let due: Vec<Due> = retries.take_due(here, now + Duration::from_secs(10));
    assert_eq!(due.len(), 1);
    assert_eq!(due[0].item.branch_ref, "refs/heads/topic");
    retries.forget(here, "refs/heads/main");
    assert_eq!(retries.next_wait(here, now), None);
}

/// Only a reported conflict needs the person; a stall, a ceiling and a refused connection do not.
#[test]
fn only_a_conflict_needs_the_person() {
    assert!(needs_the_person("cli-git: auto-push: not published: merging origin/main into main conflicts in: a.txt, b.txt. Nothing was pushed"));
    for output in [
        "cli-git: git push made no progress for 30 seconds and was stopped (limit=stall, bytes_moved=0, elapsed_seconds=30)",
        "cli-git: git push ran for 1800 seconds and was stopped (limit=ceiling)",
        "fatal: unable to access 'https://example.invalid/': Could not resolve host: example.invalid",
        "",
    ] {
        assert!(!needs_the_person(output), "{output}");
    }
}

// The texts below are Git 2.56.0's own words, captured by running `git push` from that release against fixtures on
// 2026-11-03 (a bare remote with a declining hook; a local HTTP server that answers 401 or 403; a loopback `sshd` that accepts no
// key; a port nothing listens on), and checked against its source at tag `v2.56.0`.

/// `builtin/receive-pack.c` `"pre-receive hook declined"`, shown by `transport.c` `print_ref_status` as `[remote rejected]`; the
/// `remote:` line is the hook's own output.
const PRE_RECEIVE_DECLINED: &str = "remote: protected: pushes to main need a review        \nTo /srv/remote.git\n ! [remote rejected] main -> main (pre-receive hook declined)\nerror: failed to push some refs to '/srv/remote.git'\n";

/// `builtin/receive-pack.c` `ret = "hook declined"` for the update hook, with `rp_error("hook declined to update %s")`.
const UPDATE_DECLINED: &str = "remote: update says no        \nremote: error: hook declined to update refs/heads/main        \nTo /srv/remote.git\n ! [remote rejected] main -> main (hook declined)\nerror: failed to push some refs to '/srv/remote.git'\n";

/// A hosting service's own reason in the same position, which names a hook.
const PROTECTED_BRANCH_DECLINED: &str = " ! [remote rejected] main -> main (protected branch hook declined)\n";

/// `remote-curl.c` `die(_("Authentication failed for '%s'"))`, for a 401 with a user name and no usable password.
const AUTHENTICATION_FAILED: &str = "remote: login needed\nfatal: Authentication failed for 'http://127.0.0.1:39197/r.git/'\n";

/// `prompt.c` `die("could not read %s%s", prompt, "terminal prompts disabled")`, for a 401 with no user name and prompts off.
const PROMPTS_DISABLED: &str = "fatal: could not read Username for 'http://127.0.0.1:39197': terminal prompts disabled\n";

/// `http.c` `"The requested URL returned error: %ld"`, for a 403.
const FORBIDDEN: &str = "remote: forbidden\nfatal: unable to access 'http://127.0.0.1:39871/r.git/': The requested URL returned error: 403\n";

/// OpenSSH's refusal of a key, which Git relays; real `ssh` against a loopback `sshd` that accepts no key.
const SSH_REFUSED: &str = "user@127.0.0.1: Permission denied (publickey).\nfatal: Could not read from remote repository.\n\nPlease make sure you have the correct access rights\nand the repository exists.\n";

/// `http.c` through curl, for a port nothing listens on.
const CONNECTION_REFUSED: &str = "fatal: unable to access 'http://127.0.0.1:1/r.git/': Failed to connect to 127.0.0.1:1 after 0 ms: Could not connect to server\n";

/// curl, for a name that does not resolve.
const UNRESOLVED: &str = "fatal: unable to access 'http://nonexistent.invalid/r.git/': Could not resolve host: nonexistent.invalid\n";

/// A login failure is final: the service cannot log in, and retrying only asks the remote again.
#[test]
fn an_authentication_failure_is_not_tried_again() {
    for output in [AUTHENTICATION_FAILED, PROMPTS_DISABLED, FORBIDDEN, SSH_REFUSED] {
        assert_eq!(final_failure(output), Some(FinalFailure::Login), "{output}");
        assert!(needs_the_person(output), "{output}");
    }
}

/// A server hook's decline is final, whichever hook declined and whoever wrote its reason.
#[test]
fn a_server_hook_decline_is_not_tried_again() {
    for output in [PRE_RECEIVE_DECLINED, UPDATE_DECLINED, PROTECTED_BRANCH_DECLINED] {
        assert_eq!(final_failure(output), Some(FinalFailure::Declined), "{output}");
        assert_eq!(unrecognised_rejection(output), None, "a decline that is known is not reported as unknown: {output}");
    }
}

/// Being offline is not a login failure and not a decline: it is tried again, as are a stall and the ceiling.
#[test]
fn an_offline_failure_is_still_tried_again() {
    for output in [
        CONNECTION_REFUSED,
        UNRESOLVED,
        "cli-git: git push made no progress for 30 seconds and was stopped (limit=stall, bytes_moved=0, elapsed_seconds=30)",
    ] {
        assert_eq!(final_failure(output), None, "{output}");
    }
}

/// A rejection by the server whose reason this release does not know stays retried, and is found so the journal can name it.
#[test]
fn a_rejection_nobody_knows_is_retried_and_named() {
    let output: &str = "To /srv/remote.git\n ! [remote rejected] main -> main (prohibited by the review system)\nerror: failed to push some refs\n";
    assert_eq!(final_failure(output), None);
    assert_eq!(unrecognised_rejection(output).as_deref(), Some("! [remote rejected] main -> main (prohibited by the review system)"));
    assert_eq!(unrecognised_rejection(CONNECTION_REFUSED), None, "a failure that is not a rejection names nothing");
}