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#include "git.h"
#include <maintenance.h>
#include <execinfo.h>
#include <compileTimeFormatter.h>
namespace Gentoo {
namespace Utils {
namespace Git {
void
throwError(void * const func, int err)
{
const git_error * e = giterr_last();
char ** fn = backtrace_symbols(&func, 1);
assert(fn);
assert(*fn);
throw ::Gentoo::GitError(*fn, err, e->klass, e->message);
}
AdHocFormatter(RefSpec, "refs/heads/%?:refs/remotes/%?/%?");
std::unique_ptr<git_annotated_commit, void (*)(git_annotated_commit*)>
gitFetch(git_repository * repo, git_remote * remote, const char * remoteBranchName)
{
auto opts = gitSafeGet(git_fetch_init_options, GIT_FETCH_OPTIONS_VERSION);
opts.prune = GIT_FETCH_PRUNE;
opts.update_fetchhead = 1;
auto localBranch = gitSafeGet(git_repository_head, git_reference_free, repo);
auto localBranchName = gitSafeGet(git_branch_name, localBranch.get());
auto refspec = RefSpec::get(localBranchName, git_remote_name(remote), remoteBranchName);
char * s[] = { &refspec.front() };
git_strarray refs = { s, 1 };
gitSafe(git_remote_fetch, remote, &refs, &opts, nullptr);
return gitSafeGet(git_annotated_commit_from_revspec, git_annotated_commit_free, repo, "FETCH_HEAD");
}
git_oid
gitFastForward(git_repository * repo, git_annotated_commit * fetch_head)
{
// Test fast-forward is possible
const git_annotated_commit * heads[] = { fetch_head };
git_merge_analysis_t analysis = GIT_MERGE_ANALYSIS_NONE;
git_merge_preference_t preference = GIT_MERGE_PREFERENCE_FASTFORWARD_ONLY;
gitSafe(git_merge_analysis, &analysis, &preference, repo, heads, 1);
auto head = gitSafeGet(git_repository_head, git_reference_free, repo);
if (analysis == GIT_MERGE_ANALYSIS_UP_TO_DATE) {
return *git_reference_target(head.get());
}
if (!(analysis & (GIT_MERGE_ANALYSIS_NORMAL | GIT_MERGE_ANALYSIS_FASTFORWARD))) {
throw GitError("Merge analysis", 0, 0, "Could not fast-forward branch");
}
// Perform fast-forward
auto fetch_head_id = *git_annotated_commit_id(fetch_head);
auto fetch_head_object = gitSafeGet(git_object_lookup, git_object_free, repo, &fetch_head_id, GIT_OBJ_ANY);
gitSafeGet(git_reference_set_target, git_reference_free, head.get(), &fetch_head_id, "fast-forward");
// Checkout new head
auto checkout_options = gitSafeGet(git_checkout_init_options, 0u + GIT_CHECKOUT_OPTIONS_VERSION);
checkout_options.checkout_strategy = GIT_CHECKOUT_FORCE;
gitSafe(git_checkout_head, repo, &checkout_options);
return fetch_head_id;
}
void
updateRepository(const std::string & path, const std::string & upstream, const std::string & branch)
{
auto repo = gitSafeGet(git_repository_open, git_repository_free, path.c_str());
auto origin = gitSafeGet(git_remote_lookup, git_remote_free, repo.get(), upstream.c_str());
auto fetchHead = gitFetch(repo.get(), origin.get(), branch.c_str());
gitFastForward(repo.get(), fetchHead.get());
}
}
}
}
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