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230 lines (201 loc) · 7.33 KB
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#include "../subcommand/push_subcommand.hpp"
#include <iostream>
#include <unordered_map>
#include <utility>
#include <git2/remote.h>
#include "../utils/ansi_code.hpp"
#include "../utils/credentials.hpp"
#include "../utils/progress.hpp"
#include "../wasm/scope.hpp"
#include "../wrapper/strarray_wrapper.hpp"
push_subcommand::push_subcommand(const libgit2_object&, CLI::App& app)
{
auto* sub = app.add_subcommand("push", "Update remote refs along with associated objects");
sub->add_option("<remote>", m_remote_name, "The remote to push to")->default_val("origin");
sub->add_option("<refspec>", m_refspecs, "The refspec(s) to push")->expected(0, -1);
sub->add_flag(
"--all,--branches",
m_branches_flag,
"Push all branches (i.e. refs under " + ansi_code::bold + "refs/heads/" + ansi_code::reset
+ "); cannot be used with other <refspec>."
);
sub->callback(
[this]()
{
this->run();
}
);
}
namespace
{
std::unordered_map<std::string, git_oid> get_remotes(repository_wrapper& repo, std::string remote_name)
{
std::vector<std::string> repo_refs = repo.refs_list();
std::unordered_map<std::string, git_oid> remotes_oids;
const std::string prefix = std::string("refs/remotes/") + remote_name + "/";
for (const auto& r : repo_refs)
{
if (r.size() > prefix.size() && r.compare(0, prefix.size(), prefix) == 0)
{
// r is like "refs/remotes/origin/main"
std::string short_name = r.substr(prefix.size()); // "main" or "feature/x"
git_oid oid = repo.ref_name_to_id(r);
remotes_oids.emplace(short_name, oid);
}
}
return remotes_oids;
}
std::unordered_map<std::string, git_oid> diff_branches(
std::unordered_map<std::string, git_oid> remotes_before_push,
std::unordered_map<std::string, git_oid> remotes_after_push
)
{
std::unordered_map<std::string, git_oid> new_branches;
for (const auto& br : remotes_after_push)
{
const std::string name = br.first;
const git_oid& oid = br.second;
if (!remotes_before_push.contains(name))
{
new_branches.emplace(name, oid);
}
}
return new_branches;
}
std::pair<std::vector<std::string>, std::vector<std::string>>
split_refspecs(std::vector<std::string> refspecs, std::unordered_map<std::string, git_oid> new_branches)
{
std::vector<std::string> new_pushed_refspecs;
std::vector<std::string> existing_refspecs;
for (const auto refspec : refspecs)
{
if (!new_branches.contains(refspec))
{
existing_refspecs.push_back(refspec);
}
else
{
new_pushed_refspecs.push_back(refspec);
}
}
return std::make_pair(new_pushed_refspecs, existing_refspecs);
}
std::pair<std::string, std::string>
get_branch_names(repository_wrapper& repo, std::string remote_name, std::string refspec)
{
std::optional<std::string> upstream_opt = repo.branch_upstream_name(refspec);
std::string remote_branch = refspec;
if (upstream_opt.has_value())
{
const std::string up_name = upstream_opt.value();
auto pos = up_name.find('/');
if (pos != std::string::npos && pos + 1 < up_name.size())
{
std::string up_remote = up_name.substr(0, pos);
std::string up_branch = up_name.substr(pos + 1);
if (up_remote == remote_name)
{
remote_branch = up_branch;
}
}
}
return std::make_pair(refspec, remote_branch);
}
}
void push_subcommand::fill_refspec(repository_wrapper& repo)
{
const std::string prefix = std::string("refs/heads/");
if (m_branches_flag)
{
auto iter = repo.iterate_branches(GIT_BRANCH_LOCAL);
auto br = iter.next();
while (br)
{
std::string refspec = std::string(br->name());
if (refspec.starts_with(prefix))
{
refspec = refspec.substr(prefix.size());
}
m_refspecs.push_back(refspec);
br = iter.next();
}
}
else if (m_refspecs.empty())
{
std::string branch;
try
{
auto head_ref = repo.head();
branch = head_ref.short_name();
}
catch (...)
{
std::cerr << "Could not determine current branch to push." << std::endl;
return;
}
m_refspecs.push_back(branch);
}
else
{
for (auto& refspec : m_refspecs)
{
if (refspec.starts_with(prefix))
{
refspec = refspec.substr(prefix.size());
}
}
}
}
void push_subcommand::run()
{
wasm_http_transport_scope transport; // Enables wasm http(s) transport.
auto directory = get_current_git_path();
auto repo = repository_wrapper::open(directory);
std::string remote_name = m_remote_name.empty() ? "origin" : m_remote_name;
auto remote = repo.find_remote(remote_name);
git_push_options push_opts = GIT_PUSH_OPTIONS_INIT;
if (want_user_credentials())
{
push_opts.callbacks.credentials = user_credentials;
}
push_opts.callbacks.push_transfer_progress = push_transfer_progress;
push_opts.callbacks.push_update_reference = push_update_reference;
fill_refspec(repo);
std::vector<std::string> refspecs_push;
for (auto refspec : m_refspecs)
{
refspecs_push.push_back("refs/heads/" + refspec);
}
strarray_view_wrapper refspecs_wrapper(refspecs_push);
git_strarray* refspecs_ptr = refspecs_wrapper;
auto remotes_before_push = get_remotes(repo, remote_name);
remote.push(refspecs_ptr, &push_opts);
auto remotes_after_push = get_remotes(repo, remote_name);
auto new_branches = diff_branches(remotes_before_push, remotes_after_push);
auto [new_pushed_refspecs, existing_refspecs] = split_refspecs(m_refspecs, new_branches);
std::cout << "To " << remote.url() << std::endl;
for (const auto& refspec : new_pushed_refspecs)
{
auto [local_short_name, remote_branch] = get_branch_names(repo, remote_name, refspec);
std::cout << " * [new branch] " << local_short_name << " -> " << remote_branch << std::endl;
}
for (const auto& refspec : existing_refspecs)
{
auto [local_short_name, remote_branch] = get_branch_names(repo, remote_name, refspec);
git_oid remote_oid = remotes_before_push[refspec];
git_oid local_oid;
if (auto ref_opt = repo.find_reference_dwim(("refs/heads/" + local_short_name)))
{
const git_oid* target = ref_opt->target();
local_oid = *target;
}
if (!git_oid_equal(&remote_oid, &local_oid))
{
std::string old_hex = oid_to_hex(remote_oid);
std::string new_hex = oid_to_hex(local_oid);
// TODO: check order of hex codes
std::cout << " " << old_hex.substr(0, 7) << ".." << new_hex.substr(0, 7) << " "
<< local_short_name << " -> " << remote_branch << std::endl;
}
}
}