feat(remote): add nostr git remote helper

as a simple proxy to the first git server listed in announcement

parse clone url as `nostr://naddr123...`

9 files changed, 209 insertions, 48 deletions

diff --git a/src/cli.rs b/src/cli.rs
new file mode 100644
index 0000000..d0f934e
--- /dev/null
+++ b/src/cli.rs
@@ -0,0 +1,44 @@
+use clap::{Parser, Subcommand};
+
+use crate::sub_commands;
+
+#[derive(Parser)]
+#[command(author, version, about, long_about = None)]
+#[command(propagate_version = true)]
+pub struct Cli {
+    #[command(subcommand)]
+    pub command: Commands,
+    /// remote signer address
+    #[arg(long, global = true)]
+    pub bunker_uri: Option<String>,
+    /// remote signer app secret key
+    #[arg(long, global = true)]
+    pub bunker_app_key: Option<String>,
+    /// nsec or hex private key
+    #[arg(short, long, global = true)]
+    pub nsec: Option<String>,
+    /// password to decrypt nsec
+    #[arg(short, long, global = true)]
+    pub password: Option<String>,
+    /// disable spinner animations
+    #[arg(long, action)]
+    pub disable_cli_spinners: bool,
+}
+
+#[derive(Subcommand)]
+pub enum Commands {
+    /// update cache with latest updates from nostr
+    Fetch(sub_commands::fetch::SubCommandArgs),
+    /// signal you are this repo's maintainer accepting proposals via nostr
+    Init(sub_commands::init::SubCommandArgs),
+    /// issue commits as a proposal
+    Send(sub_commands::send::SubCommandArgs),
+    /// list proposals; checkout, apply or download selected
+    List,
+    /// send proposal revision
+    Push(sub_commands::push::SubCommandArgs),
+    /// fetch and apply new proposal commits / revisions linked to branch
+    Pull,
+    /// run with --nsec flag to change npub
+    Login(sub_commands::login::SubCommandArgs),
+}
diff --git a/src/git.rs b/src/git.rs
index c13b46d..eaea512 100644
--- a/src/git.rs
+++ b/src/git.rs
@@ -10,7 +10,7 @@ use nostr_sdk::hashes::{sha1::Hash as Sha1Hash, Hash};
 use crate::sub_commands::list::{get_commit_id_from_patch, tag_value};
 
 pub struct Repo {
-    git_repo: git2::Repository,
+    pub git_repo: git2::Repository,
 }
 
 impl Repo {
diff --git a/src/git_remote_helper.rs b/src/git_remote_helper.rs
new file mode 100644
index 0000000..6050d1a
--- /dev/null
+++ b/src/git_remote_helper.rs
@@ -0,0 +1,156 @@
+#![cfg_attr(not(test), warn(clippy::pedantic))]
+#![allow(clippy::large_futures)]
+// better solution to dead_code error on multiple binaries than https://stackoverflow.com/a/66196291
+#![allow(dead_code)]
+#![cfg_attr(not(test), warn(clippy::expect_used))]
+
+use core::str;
+use std::{
+    collections::HashSet,
+    env,
+    io::{self},
+    path::PathBuf,
+};
+
+use anyhow::{bail, Context, Result};
+#[cfg(not(test))]
+use client::Connect;
+use client::{fetching_with_report, get_repo_ref_from_cache};
+use git::RepoActions;
+use nostr::nips::nip01::Coordinate;
+use nostr_sdk::Url;
+
+#[cfg(not(test))]
+use crate::client::Client;
+#[cfg(test)]
+use crate::client::MockConnect;
+use crate::git::Repo;
+
+mod cli;
+mod cli_interactor;
+mod client;
+mod config;
+mod git;
+mod key_handling;
+mod login;
+mod repo_ref;
+mod sub_commands;
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    let args = env::args();
+    let args = args.skip(1).take(2).collect::<Vec<_>>();
+
+    let ([_, url] | [url]) = args.as_slice() else {
+        bail!("invalid arguments - no url");
+    };
+    if env::args().nth(1).as_deref() == Some("--version") {
+        println!("v0.0.1");
+    }
+
+    let git_repo = Repo::from_path(&PathBuf::from(
+        std::env::var("GIT_DIR").context("git should set GIT_DIR when remote helper is called")?,
+    ))?;
+    let git_repo_path = git_repo.get_path()?;
+
+    #[cfg(not(test))]
+    let client = Client::default();
+    #[cfg(test)]
+    let client = <MockConnect as std::default::Default>::default();
+
+    let repo_coordinates = nostr_git_url_to_repo_coordinates(url).context("invalid nostr url")?;
+
+    fetching_with_report(git_repo_path, &client, &repo_coordinates).await?;
+
+    let repo_ref = get_repo_ref_from_cache(git_repo_path, &repo_coordinates).await?;
+
+    let stdin = io::stdin();
+    let mut line = String::new();
+
+    let temp_remote_url = repo_ref
+        .git_server
+        .first()
+        .context("no git server listed in nostr repository announcement")?;
+
+    let mut temp_remote = git_repo.git_repo.remote_anonymous(temp_remote_url)?;
+
+    loop {
+        let tokens = read_line(&stdin, &mut line)?;
+
+        match tokens.as_slice() {
+            ["capabilities"] => {
+                println!("option");
+                println!("push");
+                println!("fetch");
+                println!();
+            }
+            ["option", "verbosity"] => {
+                println!("ok");
+            }
+            ["option", ..] => {
+                println!("unsupported");
+            }
+            ["fetch", _oid, refstr] => {
+                temp_remote.connect(git2::Direction::Fetch)?;
+                temp_remote.download(&[refstr], None)?;
+                temp_remote.disconnect()?;
+                println!();
+            }
+            ["push", refspec] => {
+                temp_remote.connect(git2::Direction::Push)?;
+                temp_remote.push(&[refspec], None)?;
+                temp_remote.disconnect()?;
+                println!();
+            }
+            ["list"] => {
+                temp_remote.connect(git2::Direction::Fetch)?;
+                for head in temp_remote.list()? {
+                    println!("{} {}", head.oid(), head.name());
+                }
+                temp_remote.disconnect()?;
+                println!();
+            }
+            ["list", "for-push"] => {
+                temp_remote.connect(git2::Direction::Fetch)?;
+                for head in temp_remote.list()? {
+                    if head.name() != "HEAD" {
+                        println!("{} {}", head.oid(), head.name());
+                    }
+                }
+                temp_remote.disconnect()?;
+                println!();
+            }
+            [] => {
+                return Ok(());
+            }
+            _ => {
+                bail!(format!("unknown command: {}", 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)
+}
+
+fn nostr_git_url_to_repo_coordinates(url: &str) -> Result<HashSet<Coordinate>> {
+    let mut repo_coordinattes = HashSet::new();
+    let coordinate = Coordinate::parse(Url::parse(url)?.domain().context("no naddr")?)?;
+    if coordinate.kind.eq(&nostr_sdk::Kind::GitRepoAnnouncement) {
+        repo_coordinattes.insert(coordinate);
+    } else {
+        bail!("naddr doesnt point to a git repository announcement");
+    }
+    Ok(repo_coordinattes)
+}
diff --git a/src/main.rs b/src/main.rs
index 81eaf2f..add26f1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,8 +3,10 @@
 #![cfg_attr(not(test), warn(clippy::expect_used))]
 
 use anyhow::Result;
-use clap::{Parser, Subcommand};
+use clap::Parser;
+use cli::{Cli, Commands};
 
+mod cli;
 mod cli_interactor;
 mod client;
 mod config;
@@ -14,47 +16,6 @@ mod login;
 mod repo_ref;
 mod sub_commands;
 
-#[derive(Parser)]
-#[command(author, version, about, long_about = None)]
-#[command(propagate_version = true)]
-pub struct Cli {
-    #[command(subcommand)]
-    command: Commands,
-    /// remote signer address
-    #[arg(long, global = true)]
-    bunker_uri: Option<String>,
-    /// remote signer app secret key
-    #[arg(long, global = true)]
-    bunker_app_key: Option<String>,
-    /// nsec or hex private key
-    #[arg(short, long, global = true)]
-    nsec: Option<String>,
-    /// password to decrypt nsec
-    #[arg(short, long, global = true)]
-    password: Option<String>,
-    /// disable spinner animations
-    #[arg(long, action)]
-    disable_cli_spinners: bool,
-}
-
-#[derive(Subcommand)]
-enum Commands {
-    /// update cache with latest updates from nostr
-    Fetch(sub_commands::fetch::SubCommandArgs),
-    /// signal you are this repo's maintainer accepting proposals via nostr
-    Init(sub_commands::init::SubCommandArgs),
-    /// issue commits as a proposal
-    Send(sub_commands::send::SubCommandArgs),
-    /// list proposals; checkout, apply or download selected
-    List,
-    /// send proposal revision
-    Push(sub_commands::push::SubCommandArgs),
-    /// fetch and apply new proposal commits / revisions linked to branch
-    Pull,
-    /// run with --nsec flag to change npub
-    Login(sub_commands::login::SubCommandArgs),
-}
-
 #[tokio::main]
 async fn main() -> Result<()> {
     let cli = Cli::parse();
diff --git a/src/sub_commands/fetch.rs b/src/sub_commands/fetch.rs
index ab6e0fc..b1e83c5 100644
--- a/src/sub_commands/fetch.rs
+++ b/src/sub_commands/fetch.rs
@@ -9,10 +9,10 @@ use crate::client::Client;
 #[cfg(test)]
 use crate::client::MockConnect;
 use crate::{
+    cli::Cli,
     client::{fetching_with_report, Connect},
     git::{Repo, RepoActions},
     repo_ref::get_repo_coordinates,
-    Cli,
 };
 
 #[derive(clap::Args)]
diff --git a/src/sub_commands/init.rs b/src/sub_commands/init.rs
index 28ba21b..ba188c9 100644
--- a/src/sub_commands/init.rs
+++ b/src/sub_commands/init.rs
@@ -10,6 +10,7 @@ use crate::client::Client;
 #[cfg(test)]
 use crate::client::MockConnect;
 use crate::{
+    cli::Cli,
     cli_interactor::{Interactor, InteractorPrompt, PromptInputParms},
     client::{fetching_with_report, get_repo_ref_from_cache, Connect},
     git::{Repo, RepoActions},
@@ -18,7 +19,6 @@ use crate::{
         extract_pks, get_repo_config_from_yaml, save_repo_config_to_yaml,
         try_and_get_repo_coordinates, RepoRef,
     },
-    Cli,
 };
 
 #[derive(Debug, clap::Args)]
diff --git a/src/sub_commands/login.rs b/src/sub_commands/login.rs
index 6f49ba8..77fecdd 100644
--- a/src/sub_commands/login.rs
+++ b/src/sub_commands/login.rs
@@ -5,7 +5,7 @@ use clap;
 use crate::client::Client;
 #[cfg(test)]
 use crate::client::MockConnect;
-use crate::{client::Connect, git::Repo, login, Cli};
+use crate::{cli::Cli, client::Connect, git::Repo, login};
 
 #[derive(clap::Args)]
 pub struct SubCommandArgs {
diff --git a/src/sub_commands/push.rs b/src/sub_commands/push.rs
index acd91f0..56927fe 100644
--- a/src/sub_commands/push.rs
+++ b/src/sub_commands/push.rs
@@ -5,6 +5,7 @@ use crate::client::Client;
 #[cfg(test)]
 use crate::client::MockConnect;
 use crate::{
+    cli::Cli,
     client::{fetching_with_report, get_repo_ref_from_cache, Connect},
     git::{str_to_sha1, Repo, RepoActions},
     login,
@@ -21,7 +22,6 @@ use crate::{
             identify_ahead_behind, send_events,
         },
     },
-    Cli,
 };
 
 #[derive(Debug, clap::Args)]
diff --git a/src/sub_commands/send.rs b/src/sub_commands/send.rs
index 73c980b..07eb343 100644
--- a/src/sub_commands/send.rs
+++ b/src/sub_commands/send.rs
@@ -20,6 +20,7 @@ use crate::client::Client;
 #[cfg(test)]
 use crate::client::MockConnect;
 use crate::{
+    cli::Cli,
     cli_interactor::{
         Interactor, InteractorPrompt, PromptConfirmParms, PromptInputParms, PromptMultiChoiceParms,
     },
@@ -29,7 +30,6 @@ use crate::{
     git::{Repo, RepoActions},
     login,
     repo_ref::{get_repo_coordinates, RepoRef},
-    Cli,
 };
 
 #[derive(Debug, clap::Args)]