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use std::io::Stdin;
use anyhow::{bail, Result};
use auth_git2::GitAuthenticator;
use git2::Repository;
use ngit::{
git::{
nostr_url::{CloneUrl, NostrUrlDecoded, ServerProtocol},
utils::check_ssh_keys,
Repo, RepoActions,
},
git_events::tag_value,
login::get_curent_user,
repo_ref::RepoRef,
};
use crate::utils::{
find_proposal_and_patches_by_branch_name, get_oids_from_fetch_batch, get_open_proposals,
get_read_protocols_to_try, join_with_and,
};
pub async fn run_fetch(
git_repo: &Repo,
repo_ref: &RepoRef,
decoded_nostr_url: &NostrUrlDecoded,
stdin: &Stdin,
oid: &str,
refstr: &str,
) -> Result<()> {
let mut fetch_batch = get_oids_from_fetch_batch(stdin, oid, refstr)?;
let oids_from_git_servers = fetch_batch
.iter()
.filter(|(refstr, _)| !refstr.contains("refs/heads/pr/"))
.map(|(_, oid)| oid.clone())
.collect::<Vec<String>>();
let mut errors = vec![];
let term = console::Term::stderr();
for git_server_url in &repo_ref.git_server {
let term = console::Term::stderr();
if let Err(error) = fetch_from_git_server(
&git_repo.git_repo,
&oids_from_git_servers,
git_server_url,
decoded_nostr_url,
&term,
) {
errors.push(error);
} else {
break;
}
}
if oids_from_git_servers
.iter()
.any(|oid| !git_repo.does_commit_exist(oid).unwrap())
&& !errors.is_empty()
{
bail!(
"fetch: failed to fetch objects in nostr state event from:\r\n{}",
errors
.iter()
.map(|e| format!(" - {e}"))
.collect::<Vec<String>>()
.join("\r\n")
);
}
fetch_batch.retain(|refstr, _| refstr.contains("refs/heads/pr/"));
if !fetch_batch.is_empty() {
let open_proposals = get_open_proposals(git_repo, repo_ref).await?;
let current_user = get_curent_user(git_repo)?;
for (refstr, oid) in fetch_batch {
if let Some((_, (_, patches))) =
find_proposal_and_patches_by_branch_name(&refstr, &open_proposals, ¤t_user)
{
if !git_repo.does_commit_exist(&oid)? {
let mut patches_ancestor_first = patches.clone();
patches_ancestor_first.reverse();
if git_repo.does_commit_exist(&tag_value(
patches_ancestor_first.first().unwrap(),
"parent-commit",
)?)? {
for patch in &patches_ancestor_first {
git_repo.create_commit_from_patch(patch)?;
}
} else {
term.write_line(
format!("WARNING: cannot find parent commit for {refstr}").as_str(),
)?;
}
}
} else {
term.write_line(format!("WARNING: cannot find proposal for {refstr}").as_str())?;
}
}
}
term.flush()?;
println!();
Ok(())
}
fn fetch_from_git_server(
git_repo: &Repository,
oids: &[String],
git_server_url: &str,
decoded_nostr_url: &NostrUrlDecoded,
term: &console::Term,
) -> Result<()> {
let server_url = git_server_url.parse::<CloneUrl>()?;
let protocols_to_attempt = get_read_protocols_to_try(&server_url, decoded_nostr_url);
let mut failed_protocols = vec![];
let mut success = false;
for protocol in &protocols_to_attempt {
term.write_line(
format!("fetching from {} over {protocol}...", server_url.domain(),).as_str(),
)?;
let formatted_url = server_url.format_as(protocol, &decoded_nostr_url.user)?;
let res = if [ServerProtocol::UnauthHttps, ServerProtocol::UnauthHttp].contains(protocol) {
fetch_from_git_server_url_unauthenticated(git_repo, oids, &formatted_url)
} else {
fetch_from_git_server_url(git_repo, oids, &formatted_url)
};
term.clear_last_lines(1)?;
if let Err(error) = res {
term.write_line(
format!("fetch: {formatted_url} failed over {protocol}: {error}").as_str(),
)?;
failed_protocols.push(protocol);
} else {
success = true;
if !failed_protocols.is_empty() {
term.write_line(format!("fetch: succeeded over {protocol}").as_str())?;
}
}
}
if !success {
if decoded_nostr_url.protocol.is_some() {
term.write_line(
"fetch: protocol override in nostr url so not attempting with any other protocols",
)?;
}
bail!(
"{} failed over {}",
server_url.domain(),
join_with_and(&failed_protocols)
);
}
Ok(())
}
fn fetch_from_git_server_url(
git_repo: &Repository,
oids: &[String],
git_server_url: &str,
) -> Result<()> {
if git_server_url.parse::<CloneUrl>()?.protocol() == ServerProtocol::Ssh && !check_ssh_keys() {
bail!("no ssh keys found");
}
let git_config = git_repo.config()?;
let mut git_server_remote = git_repo.remote_anonymous(git_server_url)?;
let auth = GitAuthenticator::default();
let mut fetch_options = git2::FetchOptions::new();
let mut remote_callbacks = git2::RemoteCallbacks::new();
// TODO status update callback
remote_callbacks.credentials(auth.credentials(&git_config));
fetch_options.remote_callbacks(remote_callbacks);
git_server_remote.download(oids, Some(&mut fetch_options))?;
git_server_remote.disconnect()?;
Ok(())
}
fn fetch_from_git_server_url_unauthenticated(
git_repo: &Repository,
oids: &[String],
git_server_url: &str,
) -> Result<()> {
let mut git_server_remote = git_repo.remote_anonymous(git_server_url)?;
let mut fetch_options = git2::FetchOptions::new();
let remote_callbacks = git2::RemoteCallbacks::new();
// TODO status update callback
fetch_options.remote_callbacks(remote_callbacks);
git_server_remote.download(oids, Some(&mut fetch_options))?;
git_server_remote.disconnect()?;
Ok(())
}
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