"radicle-git-ext",

```

$ cd heartwood

$ git branch -r

  rad/master

  z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi/master

```

```

$ git ls-remote z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi 'refs/heads/*'

145e1e69bef3ad93d14946ea212249c2fa9b9828	refs/heads/alice/1

f2de534b5e81d7c6e2dcaf58c3dd91573c0a0354	refs/heads/master

```

``` (stderr)

$ git fetch z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi

From rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi

 * [new branch]      alice/1    -> z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi/alice/1

```

```

$ git branch -r

  rad/master

  z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi/alice/1

  z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi/master

```

```

$ git rev-parse z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi/alice/1

145e1e69bef3ad93d14946ea212249c2fa9b9828

```

Finally, we can also delete branches with `git push`:

```

$ git ls-remote rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi refs/heads/*

145e1e69bef3ad93d14946ea212249c2fa9b9828	refs/heads/alice/1

f2de534b5e81d7c6e2dcaf58c3dd91573c0a0354	refs/heads/master

```

``` (stderr) RAD_SOCKET=/dev/null

$ git push rad :alice/1

To rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi

 - [deleted]         alice/1

```

```

$ git ls-remote rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi refs/heads/*

f2de534b5e81d7c6e2dcaf58c3dd91573c0a0354	refs/heads/master

```

```

$ git checkout -b alice/1

$ git commit -m "Alice's commit" --allow-empty -s

[alice/1 87fa120] Alice's commit

```

``` (stderr) RAD_SOCKET=/dev/null

$ git push rad HEAD:alice/1

To rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi

 * [new branch]      HEAD -> alice/1

```

Make sure we can't force-push without `+`:

``` (stderr)

$ git commit --amend -m "Alice's amended commit" --allow-empty -s

```

``` (stderr) (fail)

$ git push rad HEAD:alice/1

To rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi

 ! [rejected]        HEAD -> alice/1 (non-fast-forward)

error: failed to push some refs to 'rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi'

hint: Updates were rejected because the tip of your current branch is behind

hint: its remote counterpart. Integrate the remote changes (e.g.

hint: 'git pull ...') before pushing again.

hint: See the 'Note about fast-forwards' in 'git push --help' for details.

```

And that we can with `+`:

``` (stderr) RAD_SOCKET=/dev/null

$ git push rad +HEAD:alice/1

To rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi

 + 87fa120...145e1e6 HEAD -> alice/1 (forced update)

```

```

$ git branch -r -vv

  rad/alice/1 145e1e6 Alice's amended commit

  rad/master  f2de534 Second commit

```

List our namespaced refs:

```

$ git ls-remote rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi 'refs/heads/*'

145e1e69bef3ad93d14946ea212249c2fa9b9828	refs/heads/alice/1

f2de534b5e81d7c6e2dcaf58c3dd91573c0a0354	refs/heads/master

```

List the canonical refs:

```

$ git ls-remote rad

f2de534b5e81d7c6e2dcaf58c3dd91573c0a0354	refs/heads/master

```

```

$ rad sync

✓ Synced with 1 node(s)

```

# Using `git push` to open patches

Let's checkout a branch, make a commit and push to the magic ref `refs/patches`.

When we push to this ref, a patch is created from our commits.

``` (stderr)

$ git checkout -b feature/1

Switched to a new branch 'feature/1'

$ git commit -a -m "Add things" -q --allow-empty

$ git push rad HEAD:refs/patches

To rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi

 * [new reference]   HEAD -> refs/patches

```

We can see a patch was created:

```

$ rad patch show 8f0e8ec

╭─────────────────────────────────────────────────────────────────────────────────────────╮

│ Title     Add things                                                                    │

│ Patch     8f0e8ecb47a17e8f3219f33150a4092d645e4875                                      │

│ Author    did:key:z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi                      │

│ Head      42d894a83c9c356552a57af09ccdbd5587a99045                                      │

│ Branches  feature/1                                                                     │

│ Commits   ahead 1, behind 0                                                             │

│ Status    open                                                                          │

├─────────────────────────────────────────────────────────────────────────────────────────┤

│ ● opened by did:key:z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi (you) [    ..    ] │

╰─────────────────────────────────────────────────────────────────────────────────────────╯

```

If we check our local branch, we can see its upstream is set to track a remote

branch associated with this patch:

```

$ git branch -vv

* feature/1 42d894a [rad/patches/8f0e8ecb47a17e8f3219f33150a4092d645e4875] Add things

  master    f2de534 [rad/master] Second commit

```

Let's check that it's up to date with our local head:

```

$ git status --short --branch

## feature/1...rad/patches/8f0e8ecb47a17e8f3219f33150a4092d645e4875

$ git fetch

$ git push

```

And let's look at our local and remote refs:

```

$ git show-ref

42d894a83c9c356552a57af09ccdbd5587a99045 refs/heads/feature/1

f2de534b5e81d7c6e2dcaf58c3dd91573c0a0354 refs/heads/master

f2de534b5e81d7c6e2dcaf58c3dd91573c0a0354 refs/remotes/rad/master

42d894a83c9c356552a57af09ccdbd5587a99045 refs/remotes/rad/patches/8f0e8ecb47a17e8f3219f33150a4092d645e4875

```

```

$ git ls-remote rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi 'refs/heads/patches/*'

42d894a83c9c356552a57af09ccdbd5587a99045	refs/heads/patches/8f0e8ecb47a17e8f3219f33150a4092d645e4875

$ git ls-remote rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi 'refs/cobs/*'

8f0e8ecb47a17e8f3219f33150a4092d645e4875	refs/cobs/xyz.radicle.patch/8f0e8ecb47a17e8f3219f33150a4092d645e4875

```

We can also create patches by pushing to the `rad/patches` remote. It's a bit

simpler:

``` (stderr)

$ git checkout -b feature/2 -q

$ git commit -a -m "Add more things" -q --allow-empty

$ git push rad/patches

To rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi

 * [new reference]   HEAD -> refs/patches

```

We see both branches with upstreams now:

```

$ git branch -vv

  feature/1 42d894a [rad/patches/8f0e8ecb47a17e8f3219f33150a4092d645e4875] Add things

* feature/2 b94a835 [rad/patches/8678aafff1d1e28430952abf431e60b87e28023c] Add more things

  master    f2de534 [rad/master] Second commit

```

And both patches:

```

$ rad patch

╭────────────────────────────────────────────────────────────────────────────────────╮

│ ●  ID       Title            Author                  Head     +   -   Updated      │

├────────────────────────────────────────────────────────────────────────────────────┤

│ ●  8678aaf  Add more things  z6MknSL…StBU8Vi  (you)  b94a835  +0  -0  [    ...   ] │

│ ●  8f0e8ec  Add things       z6MknSL…StBU8Vi  (you)  42d894a  +0  -0  [    ...   ] │

╰────────────────────────────────────────────────────────────────────────────────────╯

```

Note that we can't fetch from `rad/patches`:

``` (stderr) (fail)

$ git fetch rad/patches

fatal: couldn't find remote ref refs/patches

```

To update our patch, we simply push commits to the upstream branch:

```

$ git commit -a -m "Improve code" -q --allow-empty

```

``` (stderr)

$ git push

4b6618a6ccb0b406659364a70a00bb60e4cd7cf0

To rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi

   b94a835..662843e  feature/2 -> patches/8678aafff1d1e28430952abf431e60b87e28023c

```

This last `git push` worked without specifying an upstream branch despite the

local branch having a different name than the remote. This is because Radicle

configures repositories upon `rad init` with `push.default = upstream`:

```

$ git config --local --get push.default

upstream

```

This allows for pushing to the remote patch branch without using the full

`<src>:<dst>` syntax.

We can then see that the patch head has moved:

```

$ rad patch show 8678aaf

╭─────────────────────────────────────────────────────────────────────────────────────────╮

│ Title     Add more things                                                               │

│ Patch     8678aafff1d1e28430952abf431e60b87e28023c                                      │

│ Author    did:key:z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi                      │

│ Head      662843ed81e76efa69d7901fb7bdd775043015d0                                      │

│ Branches  feature/2                                                                     │

│ Commits   ahead 3, behind 0                                                             │

│ Status    open                                                                          │

├─────────────────────────────────────────────────────────────────────────────────────────┤

│ ● opened by did:key:z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi (you) [   ...    ] │

│ ↑ updated to 4b6618a6ccb0b406659364a70a00bb60e4cd7cf0 (662843e) [              ...    ] │

╰─────────────────────────────────────────────────────────────────────────────────────────╯

```

And we can check that all the refs are properly updated in our repository:

```

$ git rev-parse HEAD

662843ed81e76efa69d7901fb7bdd775043015d0

```

```

$ git status --short --branch

## feature/2...rad/patches/8678aafff1d1e28430952abf431e60b87e28023c

```

```

$ git rev-parse refs/remotes/rad/patches/8678aafff1d1e28430952abf431e60b87e28023c

662843ed81e76efa69d7901fb7bdd775043015d0

$ git ls-remote rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi refs/heads/patches/8678aafff1d1e28430952abf431e60b87e28023c

662843ed81e76efa69d7901fb7bdd775043015d0	refs/heads/patches/8678aafff1d1e28430952abf431e60b87e28023c

```

## Force push

Sometimes, it's necessary to force-push a patch update. For example, if we amended

the commit and want the updated patch to reflect that.

Let's try.

```

$ git commit --amend -m "Amended commit" --allow-empty

[feature/2 3507cd5] Amended commit

 Date: [..]

```

Now let's push to the patch head.

``` (stderr) (fail)

$ git push

To rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi

 ! [rejected]        feature/2 -> patches/8678aafff1d1e28430952abf431e60b87e28023c (non-fast-forward)

error: failed to push some refs to 'rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi'

hint: Updates were rejected because a pushed branch tip is behind its remote

hint: counterpart. Check out this branch and integrate the remote changes

hint: (e.g. 'git pull ...') before pushing again.

hint: See the 'Note about fast-forwards' in 'git push --help' for details.

```

The push fails because it's not a fast-forward update. To remedy this, we can

use `--force` to force the update.

``` (stderr)

$ git push --force

983f2d21c9fbe91c21ddfbcd3e3d6cd13db0a944

To rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi

 + 662843e...3507cd5 feature/2 -> patches/8678aafff1d1e28430952abf431e60b87e28023c (forced update)

```

That worked. We can see the new revision if we call `rad patch show`:

```

$ rad patch show 8678aaf

╭─────────────────────────────────────────────────────────────────────────────────────────╮

│ Title     Add more things                                                               │

│ Patch     8678aafff1d1e28430952abf431e60b87e28023c                                      │

│ Author    did:key:z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi                      │

│ Head      3507cd57811fe5f21f6a0a610a1ac8068b3a5d9f                                      │

│ Branches  feature/2                                                                     │

│ Commits   ahead 3, behind 0                                                             │

│ Status    open                                                                          │

├─────────────────────────────────────────────────────────────────────────────────────────┤

│ ● opened by did:key:z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi (you) 4 months ago │

│ ↑ updated to 4b6618a6ccb0b406659364a70a00bb60e4cd7cf0 (662843e) 4 months ago            │

│ ↑ updated to 983f2d21c9fbe91c21ddfbcd3e3d6cd13db0a944 (3507cd5) 4 months ago            │

╰─────────────────────────────────────────────────────────────────────────────────────────╯

```

bob         z6Mkt67GdsW7715MEfRuP4pSZxJRJh6kj6Y48WRqVv4N1tRk (fetch)

rad         (canonical upstream)                             (fetch)

rad         z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi (push)

rad/patches (patches upstream)                               (push)

We can also confirm that the patch branch is in storage:

```

$ git ls-remote rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6Mkt67GdsW7715MEfRuP4pSZxJRJh6kj6Y48WRqVv4N1tRk refs/heads/flux-capacitor-power

3e674d1a1df90807e934f9ae5da2591dd6848a33	refs/heads/flux-capacitor-power

```

```

``` (stderr)

From rad://z42hL2jL4XNk6K8oHQaSWfMgCL7ji/z6Mkt67GdsW7715MEfRuP4pSZxJRJh6kj6Y48WRqVv4N1tRk

 * [new branch]      flux-capacitor-power -> bob/flux-capacitor-power

 * [new branch]      master               -> bob/master

                    &*radicle::rad::REMOTE_NAME,

                    radicle::git::refs::workdir::branch(proj.default_branch()),

        // TODO(cloudhead): Disable this when invoked from remote helper.

            &*radicle::rad::REMOTE_NAME,

            head_branch_name,

use radicle::rad;

            let description = if r.name == rad::PATCHES_REMOTE_NAME.as_str() {

                if dir == "fetch" {

                    // Fetching from the patches remote is not allowed.

                    continue;

                }

                term::format::dim("(patches upstream)".to_string()).italic()

            } else {

                url.namespace.map_or(

                    term::format::dim("(canonical upstream)".to_string()).italic(),

                    |namespace| term::format::tertiary(namespace.to_string()),

                )

            };

                description,

        term::info!("Not connected to any seeds.");

            radicle::git::set_upstream(self.repo, node.to_string(), &branch_name, local_branch)?;

fn rad_patch_via_push() {

    logger::init(log::Level::Debug);

    let mut environment = Environment::new();

    let profile = environment.profile("alice");

    let working = tempfile::tempdir().unwrap();

    let home = &profile.home;

    // Setup a test repository.

    fixtures::repository(working.path());

    test("examples/rad-init.md", working.path(), Some(home), []).unwrap();

    test(

        "examples/rad-patch-via-push.md",

        working.path(),

        Some(home),

        [],

    )

    .unwrap();

}

#[test]

fn git_push_and_pull() {

    logger::init(log::Level::Debug);

    let mut environment = Environment::new();

    let alice = environment.node("alice");

    let bob = environment.node("bob");

    let working = environment.tmp().join("working");

    fixtures::repository(working.join("alice"));

    test(

        "examples/rad-init.md",

        working.join("alice"),

        Some(&alice.home),

        [],

    )

    .unwrap();

    let alice = alice.spawn(Config::default());

    let mut bob = bob.spawn(Config::default());

    bob.connect(&alice).converge([&alice]);

    test(

        "examples/rad-clone.md",

        &working.join("bob"),

        Some(&bob.home),

        [],

    )

    .unwrap();

    test(

        "examples/git/git-push.md",

        &working.join("alice"),

        Some(&alice.home),

        [],

    )

    .unwrap();

    test(

        "examples/git/git-pull.md",

        &working.join("bob"),

        Some(&bob.home),

        [],

    )

    .unwrap();

    test(

        "examples/git/git-push-delete.md",

        &working.join("alice"),

        Some(&alice.home),

        [],

    )

    .unwrap();

}

#[test]

radicle-git-ext = { version = "0" }

use std::io;

use std::path::Path;

use thiserror::Error;

use radicle::git;

use radicle::storage::git::transport::local::Url;

use radicle::storage::ReadRepository;

use crate::read_line;

#[derive(Debug, Error)]

pub enum Error {

    /// Invalid command received.

    #[error("invalid command `{0}`")]

    InvalidCommand(String),

    /// I/O error.

    #[error("i/o error: {0}")]

    Io(#[from] io::Error),

    /// Invalid reference name.

    #[error("invalid ref: {0}")]

    InvalidRef(#[from] radicle::git::fmt::Error),

    /// Git error.

    #[error("git: {0}")]

    Git(#[from] git::raw::Error),

}

/// Run a git fetch command.

pub fn run<R: ReadRepository>(

    mut refs: Vec<String>,

    working: &Path,

    url: Url,

    stored: R,

    stdin: &io::Stdin,

) -> Result<(), Error> {

    // Read all the `fetch` lines.

    let mut line = String::new();

    loop {

        let tokens = read_line(stdin, &mut line)?;

        match tokens.as_slice() {

            ["fetch", _oid, refstr] => {

                refs.push(refstr.to_string());

            }

            // An empty line means end of input.

            [] => break,

            // Once the first `fetch` command is received, we don't expect anything else.

            _ => return Err(Error::InvalidCommand(line.trim().to_owned())),

        }

    }

    // Verify them and prepare the final refspecs.

    let mut refspecs = Vec::new();

    for refstr in refs {

        let refstr = git::RefString::try_from(refstr)?;

        if let Some(nid) = url.namespace {

            refspecs.push(nid.to_namespace().join(refstr).to_string());

        } else {

            refspecs.push(refstr.to_string());

        };

    }

    git::raw::Repository::open(working)?

        .remote_anonymous(&git::url::File::new(stored.path()).to_string())?

        .fetch(&refspecs, None, None)?;

    // Nb. An empty line means we're done.

    println!();

    Ok(())

}

//! The Radicle Git remote helper.

//!

//! Communication with the user is done via `stderr` (`eprintln`).

//! Communication with Git tooling is done via `stdout` (`println`).

mod fetch;

mod list;

mod push;

use std::{env, io};

use radicle::git;

use radicle::storage::{ReadRepository, WriteStorage};

    /// I/O error.

    #[error("i/o error: {0}")]

    Io(#[from] io::Error),

    /// The `GIT_DIR` env var is not set.

    #[error("the `GIT_DIR` environment variable is not set")]

    NoGitDir,

    /// Git error.

    #[error("git: {0}")]

    Git(#[from] git::raw::Error),

    /// Storage error.

    #[error(transparent)]

    Storage(#[from] radicle::storage::Error),

    /// Fetch error.

    #[error(transparent)]

    Fetch(#[from] fetch::Error),

    /// Push error.

    #[error(transparent)]

    Push(#[from] push::Error),

    /// List error.

    #[error(transparent)]

    List(#[from] list::Error),

pub fn run(profile: radicle::Profile) -> Result<(), Error> {

                return Err(Error::InvalidArguments(args));

    let stored = profile.storage.repository_mut(url.repo)?;

    if stored.is_empty()? {

        return Err(Error::RepositoryNotFound(stored.path().to_path_buf()));

    // `GIT_DIR` is expected to be set by Git tooling, and points to the working copy.

    let working = env::var("GIT_DIR")

        .map(PathBuf::from)

        .map_err(|_| Error::NoGitDir)?;

    let mut line = String::new();

        let tokens = read_line(&stdin, &mut line)?;

                println!("option");

                println!("push"); // Implies `list` command.

                println!("fetch");

            ["option", "verbosity"] => {

                println!("ok");

            }

            ["option", "push-option", _opt] => {

                println!("unsupported");

            }

            ["option", "progress", ..] => {

                println!("unsupported");

            }

            ["option", ..] => {

                println!("unsupported");

            }

            ["fetch", _oid, refstr] => {

                return fetch::run(vec![refstr.to_string()], &working, url, stored, &stdin)

                    .map_err(Error::from);

            }

            ["push", refspec] => {

                return push::run(

                    vec![refspec.to_string()],

                    &working,

                    url,

                    stored,

                    &profile,

                    &stdin,

                )

                .map_err(Error::from);

            }

            ["list"] => {

                list::for_fetch(&url, &stored)?;

            }

            ["list", "for-push"] => {

                list::for_push(&profile, &stored)?;

                return Ok(());

                return Err(Error::InvalidCommand(line.trim().to_owned()));

}

/// Read one line from stdin, and split it into tokens.

pub(crate) fn read_line<'a>(stdin: &io::Stdin, line: &'a mut String) -> io::Result<Vec<&'a str>> {

    line.clear();

    let read = stdin.read_line(line)?;

    if read == 0 {

        return Ok(vec![]);

    }

    let line = line.trim();

    let tokens = line.split(' ').filter(|t| !t.is_empty()).collect();

    Ok(tokens)

use thiserror::Error;

use radicle::git;

use radicle::storage::git::transport::local::Url;

use radicle::storage::ReadRepository;

use radicle::Profile;

#[derive(Debug, Error)]

pub enum Error {

    /// Storage error.

    #[error(transparent)]

    Storage(#[from] radicle::storage::Error),

    /// Identity error.

    #[error(transparent)]

    Identity(#[from] radicle::identity::IdentityError),

    /// Git error.

    #[error(transparent)]

    Git(#[from] radicle::git::ext::Error),

}

/// List refs for fetching (`git fetch` and `git ls-remote`).

pub fn for_fetch<R: ReadRepository>(url: &Url, stored: &R) -> Result<(), Error> {

    if let Some(namespace) = url.namespace {

        // Listing namespaced refs.

        for (name, oid) in stored.references_of(&namespace)? {

            println!("{oid} {name}");

        }

    } else {

        // Listing canonical refs.

        // We skip over `refs/rad/*`, since those are not meant to be fetched into a working copy.

        for glob in [

            git::refspec::pattern!("refs/heads/*"),

            git::refspec::pattern!("refs/tags/*"),

        ] {

            for (name, oid) in stored.references_glob(&glob)? {

                println!("{oid} {name}");

            }

        }

    }

    println!();

    Ok(())

}

/// List refs for pushing (`git push`).

pub fn for_push<R: ReadRepository>(profile: &Profile, stored: &R) -> Result<(), Error> {

    // Only our own refs can be pushed to.

    for (name, oid) in stored.references_of(profile.id())? {

        println!("{oid} {name}");

    }

    println!();

    Ok(())

}

use std::collections::HashSet;

use std::ffi::OsStr;

use std::os::fd::{AsRawFd, FromRawFd};

use std::path::Path;

use std::str::FromStr;

use std::{io, process};

use radicle::storage::git::cob::object::ParseObjectId;

use thiserror::Error;

use radicle::crypto::PublicKey;

use radicle::node::{Handle, NodeId};

use radicle::storage::git::transport::local::Url;

use radicle::storage::WriteRepository;

use radicle::Profile;

use radicle::{git, rad};

use crate::read_line;

#[derive(Debug, Error)]

pub enum Error {

    /// Public key doesn't match the remote namespace we're pushing to.

    #[error("public key `{0}` does not match remote namespace")]

    KeyMismatch(PublicKey),

    /// No public key is given

    #[error("no public key given as a remote namespace, perhaps you are attempting to push to restricted refs")]

    NoKey,

    /// Invalid command received.

    #[error("invalid command `{0}`")]

    InvalidCommand(String),

    /// I/O error.

    #[error("i/o error: {0}")]

    Io(#[from] io::Error),

    /// A command exited with an error code.

    #[error("command '{0}' failed with status {1}")]

    CommandFailed(String, i32),

    /// Invalid reference name.

    #[error("invalid ref: {0}")]

    InvalidRef(#[from] radicle::git::fmt::Error),

    /// Git error.

    #[error("git: {0}")]

    Git(#[from] git::raw::Error),

    /// Storage error.

    #[error(transparent)]

    Storage(#[from] radicle::storage::Error),

    /// Profile error.

    #[error(transparent)]

    Profile(#[from] radicle::profile::Error),

    /// Identity error.

    #[error(transparent)]

    Identity(#[from] radicle::identity::IdentityError),

    /// Parse error for object IDs.

    #[error(transparent)]

    ParseObjectId(#[from] ParseObjectId),

}

enum Command {

    Push(git::Refspec<git::RefString, git::RefString>),

    Delete(git::RefString),

}

impl Command {

    /// Return the destination refname.

    fn dst(&self) -> &git::RefStr {

        match self {

            Self::Push(rs) => rs.dst.as_refstr(),

            Self::Delete(rs) => rs,

        }

    }

}

impl FromStr for Command {

    type Err = git::ext::ref_format::Error;

    fn from_str(s: &str) -> Result<Self, Self::Err> {

        let Some((src, dst)) = s.split_once(':') else {

            return Err(git::ext::ref_format::Error::Empty);

        };

        let dst = git::RefString::try_from(dst)?;

        if src.is_empty() {

            Ok(Self::Delete(dst))

        } else {

            let (src, force) = if let Some(stripped) = src.strip_prefix('+') {

                (stripped, true)

            } else {

                (src, false)

            };

            let src = git::RefString::try_from(src)?;

            Ok(Self::Push(git::Refspec { src, dst, force }))

        }

    }

}

/// Run a git push command.

pub fn run<R: WriteRepository>(

    mut specs: Vec<String>,

    working: &Path,

    url: Url,

    stored: R,

    profile: &Profile,

    stdin: &io::Stdin,

) -> Result<(), Error> {

    // Don't allow push if either of these conditions is true:

    //

    // 1. Our key is not in ssh-agent, which means we won't be able to sign the refs.

    // 2. Our key is not the one loaded in the profile, which means that the signed refs

    //    won't match the remote we're pushing to.

    // 3. The URL namespace is not set.

    let nid = url.namespace.ok_or(Error::NoKey).and_then(|ns| {

        (profile.public_key == ns)

            .then_some(ns)

            .ok_or(Error::KeyMismatch(profile.public_key))

    })?;

    let signer = profile.signer()?;

    let mut line = String::new();

    let mut ok = HashSet::new();

    // Read all the `push` lines.

    loop {

        let tokens = read_line(stdin, &mut line)?;

        match tokens.as_slice() {

            ["push", spec] => {

                specs.push(spec.to_string());

            }

            // An empty line means end of input.

            [] => break,

            // Once the first `push` command is received, we don't expect anything else.

            _ => return Err(Error::InvalidCommand(line.trim().to_owned())),

        }

    }

    // For each refspec, push a ref or delete a ref.

    for spec in specs {

        let Ok(cmd) = Command::from_str(&spec) else {

            return Err(Error::InvalidCommand(format!("push {spec}")));

        };

        let result = match &cmd {

            Command::Delete(dst) => {

                // Delete refs.

                let refname = nid.to_namespace().join(dst);

                stored

                    .raw()

                    .find_reference(&refname)

                    .and_then(|mut r| r.delete())

                    .map_err(Error::from)

            }

            Command::Push(git::Refspec { src, dst, force }) => {

                let working = git::raw::Repository::open(working)?;

                let stored = stored.raw();

                if let Some(oid) = dst.strip_prefix(git::refname!("refs/heads/patches")) {

                    let oid = git::Oid::from_str(oid)?;

                    patch_update(src, dst, *force, &oid, &nid, &working, stored)

                } else if dst == &*rad::PATCHES_REFNAME {

                    patch_open(src, &nid, &working, stored)

                } else {

                    push_ref(src, dst, *force, &nid, &working, stored)

                }

            }

        };

        match result {

            // Let Git tooling know that this ref has been pushed.

            Ok(()) => {

                println!("ok {}", cmd.dst());

                ok.insert(spec);

            }

            // Let Git tooling know that there was an error pushing the ref.

            Err(e) => println!("error {} {e}", cmd.dst()),

        }

    }

    // Sign refs and sync if at least one ref pushed successfully.

    if !ok.is_empty() {

        stored.sign_refs(&signer)?;

        stored.set_head()?;

        // Connect to local node and announce refs to the network.

        // If our node is not running, we simply skip this step, as the

        // refs will be announced eventually, when the node restarts.

        if radicle::Node::new(profile.socket()).is_running() {

            let rid = stored.id().to_string();

            let stderr = io::stderr().as_raw_fd();

            // Nb. allow this to fail. The push to local storage was still successful.

            execute("rad", ["sync", &rid, "--verbose"], unsafe {

                process::Stdio::from_raw_fd(stderr)

            })

            .ok();

        }

    }

    // Done.

    println!();

    Ok(())

}

/// Open a new patch.

fn patch_open(

    src: &git::RefStr,

    nid: &NodeId,

    working: &git::raw::Repository,

    stored: &git::raw::Repository,

) -> Result<(), Error> {

    let reference = working.find_reference(src.as_str())?;

    let commit = reference.peel_to_commit()?;

    let dst = &*git::refs::storage::staging::patch(nid, commit.id());

    // Before creating the patch, we must push the associated git objects to storage.

    // Unfortunately, we don't have an easy way to transfer the missing objects without

    // creating a temporary reference on the remote. The temporary reference is deleted

    // once the patch is open, or in case of error.

    //

    // In case the reference is not properly deleted, the next attempt to open a patch should

    // not fail, since the reference will already exist with the correct OID.

    push_ref(src, dst, false, nid, working, stored)?;

    let result = match execute(

        "rad",

        ["patch", "open", "--quiet", "--no-push"],

        process::Stdio::piped(),

    ) {

        Ok(patch) => {

            let patch = patch.trim();

            let patch = radicle::cob::ObjectId::from_str(patch)?;

            // Create long-lived patch head reference, now that we know the Patch ID.

            //

            //  refs/namespaces/<nid>/refs/heads/patches/<patch-id>

            //

            let refname = git::refs::storage::patch(nid, &patch);

            let _ = stored.reference(

                refname.as_str(),

                commit.id(),

                true,

                "Create reference for patch head",

            )?;

            let head = working.head()?;

            if head.peel_to_commit()?.id() == commit.id() {

                if let Ok(r) = head.resolve() {

                    let branch = git::raw::Branch::wrap(r);

                    let name: Option<git::RefString> =

                        branch.name()?.and_then(|b| b.try_into().ok());

                    working.reference(

                        &git::refs::workdir::patch_upstream(&patch),

                        commit.id(),

                        // The patch shouldn't exist yet, and so neither should

                        // this ref.

                        false,

                        "Create remote tracking branch for patch",

                    )?;

                    if let Some(name) = name {

                        if branch.upstream().is_err() {

                            git::set_upstream(

                                working,

                                &*radicle::rad::REMOTE_NAME,

                                name.as_str(),

                                git::refs::workdir::patch(&patch),

                            )?;

                        }

                    }

                }

            }

            Ok(())

        }

        Err(e) => Err(e),

    };

    // Delete short-lived patch head reference.

    stored.find_reference(dst).map(|mut r| r.delete()).ok();

    result

}

/// Update an existing patch.

fn patch_update(

    src: &git::RefStr,

    dst: &git::RefStr,

    force: bool,

    oid: &git::Oid,

    nid: &NodeId,

    working: &git::raw::Repository,

    stored: &git::raw::Repository,

) -> Result<(), Error> {

    push_ref(src, dst, force, nid, working, stored)?;

    // Patch ID.

    let oid = radicle::cob::ObjectId::from(oid);

    let stderr = io::stderr().as_raw_fd();

    // Nb. Git tooling checks that we aren't attempting a forced update without the `--force`

    // option of `git push`. There's no need for us to check here.

    execute(

        "rad",

        ["patch", "update", "--quiet", "--no-push", &oid.to_string()],

        unsafe { process::Stdio::from_raw_fd(stderr) },

    )

    .map(|_| ())

    .map_err(Error::from)

}

/// Push a single reference to storage.

fn push_ref(

    src: &git::RefStr,

    dst: &git::RefStr,

    force: bool,

    nid: &NodeId,

    working: &git::raw::Repository,

    stored: &git::raw::Repository,

) -> Result<(), Error> {

    let mut remote = working.remote_anonymous(&git::url::File::new(stored.path()).to_string())?;

    let dst = nid.to_namespace().join(dst);

    let refspec = git::Refspec { src, dst, force };

    // Nb. The *force* indicator (`+`) is processed by Git tooling before we even reach this code.

    // This happens during the `list for-push` phase.

    remote.push(&[refspec.to_string().as_str()], None)?;

    Ok(())

}

/// Execute a command as a child process, redirecting its stdout to the given `Stdio`.

fn execute<S: AsRef<std::ffi::OsStr>>(

    name: &str,

    args: impl IntoIterator<Item = S>,

    stdout: process::Stdio,

) -> Result<String, Error> {

    let mut cmd = process::Command::new(name);

    cmd.args(args)

        .stdout(stdout)

        .stderr(process::Stdio::inherit());

    let child = cmd.spawn()?;

    let output = child.wait_with_output()?;

    let status = output.status;

    if !status.success() {

        let cmd = format!(

            "{} {}",

            cmd.get_program().to_string_lossy(),

            cmd.get_args()

                .collect::<Vec<_>>()

                .join(OsStr::new(" "))

                .to_string_lossy()

        );

        return Err(Error::CommandFailed(cmd, status.code().unwrap_or(-1)));

    }

    Ok(String::from_utf8_lossy(&output.stdout).to_string())

}

use std::os::fd::{AsRawFd, FromRawFd};

        process::Command::new(cmd)

            .stdout(unsafe { process::Stdio::from_raw_fd(io::stderr().as_raw_fd()) })

            .arg(&self.path)

            .spawn()?

            .wait()?;

    refspec::{PatternStr, PatternString, Refspec},

    use radicle_cob as cob;

        /// A patch reference.

        ///

        /// `refs/namespaces/<remote>/refs/heads/patches/<object_id>`

        ///

        pub fn patch<'a>(remote: &RemoteId, object_id: &cob::ObjectId) -> Namespaced<'a> {

            Qualified::from_components(

                component!("heads"),

                component!("patches"),

                Some(object_id.into()),

            )

            .with_namespace(remote.into())

        }

        /// Staging/temporary references.

        pub mod staging {

            use super::*;

            /// Where patches are pushed initially, when they don't have an object-id yet.

            /// This is a short-lived reference, which is deleted after the patch has been opened.

            /// The `<oid>` is the commit proposed in the patch.

            ///

            /// `refs/namespaces/<remote>/refs/patch/heads/<oid>`

            ///

            pub fn patch<'a>(remote: &RemoteId, oid: impl Into<Oid>) -> Namespaced<'a> {

                // SAFETY: OIDs are valid reference names and valid path component.

                #[allow(clippy::unwrap_used)]

                let oid = RefString::try_from(oid.into().to_string()).unwrap();

                #[allow(clippy::unwrap_used)]

                let oid = Component::from_refstr(oid).unwrap();

                Qualified::from_components(component!("patch"), component!("heads"), Some(oid))

                    .with_namespace(remote.into())

            }

        }

        use format::name::component;

        /// A patch head.

        ///

        /// `refs/heads/patches/<patch-id>`

        ///

        pub fn patch<'a>(patch_id: &cob::ObjectId) -> Qualified<'a> {

            Qualified::from_components(

                component!("heads"),

                component!("patches"),

                Some(patch_id.into()),

            )

        }

        /// A patch head.

        ///

        /// `refs/remotes/rad/patches/<patch-id>`

        ///

        pub fn patch_upstream<'a>(patch_id: &cob::ObjectId) -> Qualified<'a> {

            Qualified::from_components(

                component!("remotes"),

                crate::rad::REMOTE_COMPONENT.clone(),

                [component!("patches"), patch_id.into()],

            )

        }

/// Configure a radicle repository.

///

/// * Sets `push.default = upstream`.

pub fn configure_repository(repo: &git2::Repository) -> Result<(), git2::Error> {

    let mut cfg = repo.config()?;

    cfg.set_str("push.default", "upstream")?;

    Ok(())

}

///   url = <fetch>

///   pushurl = <push>

    if push != fetch {

        repo.remote_set_pushurl(name, Some(push.to_string().as_str()))?;

    }

    Ok(remote)

}

/// Configure a repository's patches remote.

///

/// The entry for this remote will be:

/// ```text

/// [remote.<name>]

///   url = <url>

///   pushurl = <url>

///   push HEAD:refs/patches

/// ```

pub fn configure_patches_remote<'r>(

    repo: &'r git2::Repository,

    name: &str,

    refspec: &Refspec<RefString, RefString>,

    push: &Url,

) -> Result<git2::Remote<'r>, git2::Error> {

    let push = push.to_string();

    let remote = repo.remote(name, &push)?;

    // This fetchspec basically prevents fetching from this remote,

    // as it shouldn't be used for fetching.

    repo.remote_add_fetch(name, "refs/patches:refs/patches")?;

    repo.remote_set_pushurl(name, Some(&push))?;

    repo.remote_add_push(name, refspec.to_string().as_str())?;

    remote: impl AsRef<str>,

    branch: impl AsRef<str>,

    merge: impl AsRef<str>,

    let remote = remote.as_ref();

    let branch = branch.as_ref();

    let merge = merge.as_ref();

        pub fn new(path: impl Into<PathBuf>) -> Self {

            Self { path: path.into() }

    pub const GIT_DEFAULT_CONFIG: [(&str, &str); 2] = [

/// Name of the radicle storage remote.

pub static REMOTE_COMPONENT: Lazy<git::Component> = Lazy::new(|| git::fmt::name::component!("rad"));

/// Name of the radicle patches remote.

pub static PATCHES_REMOTE_NAME: Lazy<git::RefString> = Lazy::new(|| git::refname!("rad/patches"));

/// Refname used for pushing patches.

pub static PATCHES_REFNAME: Lazy<git::RefString> = Lazy::new(|| git::refname!("refs/patches"));

    git::configure_repository(repo)?;

    git::configure_patches_remote(

        repo,

        &PATCHES_REMOTE_NAME,

        &git::Refspec {

            src: git::refname!("HEAD"),

            dst: PATCHES_REFNAME.clone(),

            force: false,

        },

        &url.with_namespace(*pk),

    )?;

        git::set_upstream(&repo, &*REMOTE_NAME, project.default_branch(), branch_ref)?;

    fn commit(&self, oid: Oid) -> Result<git2::Commit, git::ext::Error>;

    /// Get all references following a pattern.

    /// Skips references with names that are not parseable into [`Qualified`].

    ///

    /// This function always peels reference to the commit. For tags, this means the [`Oid`] of the

    /// commit pointed to by the tag is returned, and not the [`Oid`] of the tag itsself.

    fn references_glob(

        &self,

        pattern: &git::PatternStr,

    ) -> Result<Vec<(Qualified, Oid)>, git::ext::Error>;