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/*
* git2r, R bindings to the libgit2 library.
* Copyright (C) 2013-2024 The git2r contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2,
* as published by the Free Software Foundation.
*
* git2r is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <R_ext/Visibility.h>
#include <git2.h>
#include "git2r_arg.h"
#include "git2r_error.h"
#include "git2r_reference.h"
#include "git2r_repository.h"
#include "git2r_S3.h"
/**
* Init slots in S3 class git_reference.
*
* @param source A git_reference pointer
* @param repo S3 class git_repository that contains the reference
* @param dest S3 class git_reference to initialize
* @return void
*/
static void
git2r_reference_init(
git_reference *source,
SEXP repo,
SEXP dest)
{
char sha[GIT_OID_HEXSZ + 1];
SET_VECTOR_ELT(
dest,
git2r_S3_item__git_reference__name,
Rf_mkString(git_reference_name(source)));
SET_VECTOR_ELT(
dest,
git2r_S3_item__git_reference__shorthand,
Rf_mkString(git_reference_shorthand(source)));
switch (git_reference_type(source)) {
case GIT_REFERENCE_DIRECT:
SET_VECTOR_ELT(
dest,
git2r_S3_item__git_reference__type,
Rf_ScalarInteger(GIT_REFERENCE_DIRECT));
git_oid_fmt(sha, git_reference_target(source));
sha[GIT_OID_HEXSZ] = '\0';
SET_VECTOR_ELT(
dest,
git2r_S3_item__git_reference__sha,
Rf_mkString(sha));
break;
case GIT_REFERENCE_SYMBOLIC:
SET_VECTOR_ELT(
dest,
git2r_S3_item__git_reference__type,
Rf_ScalarInteger(GIT_REFERENCE_SYMBOLIC));
SET_VECTOR_ELT(
dest,
git2r_S3_item__git_reference__target,
Rf_mkString(git_reference_symbolic_target(source)));
break;
default:
git2r_error(__func__, NULL, git2r_err_reference, NULL);
}
if (Rf_isNull(VECTOR_ELT(dest, git2r_S3_item__git_reference__target))) {
SET_VECTOR_ELT(
dest,
git2r_S3_item__git_reference__target,
Rf_ScalarString(NA_STRING));
}
SET_VECTOR_ELT(dest, git2r_S3_item__git_reference__repo, Rf_duplicate(repo));
}
/**
* Lookup the full name of a reference by DWIMing its short name
*
* @param repo S3 class git_repository
* @param shorthand The short name for the reference
* @return S3 class git_reference object
*/
SEXP attribute_hidden
git2r_reference_dwim(
SEXP repo,
SEXP shorthand)
{
int error, nprotect = 0;
SEXP result = R_NilValue;
git_reference* reference = NULL;
git_repository *repository = NULL;
if (git2r_arg_check_string(shorthand))
git2r_error(__func__, NULL, "'shorthand'", git2r_err_string_arg);
repository = git2r_repository_open(repo);
if (!repository)
git2r_error(__func__, NULL, git2r_err_invalid_repository, NULL);
error = git_reference_dwim(
&reference,
repository,
CHAR(STRING_ELT(shorthand, 0)));
if (error)
goto cleanup;
PROTECT(result = Rf_mkNamed(VECSXP, git2r_S3_items__git_reference));
nprotect++;
Rf_setAttrib(result, R_ClassSymbol,
Rf_mkString(git2r_S3_class__git_reference));
git2r_reference_init(reference, repo, result);
cleanup:
git_reference_free(reference);
git_repository_free(repository);
if (nprotect)
UNPROTECT(nprotect);
if (error)
git2r_error(__func__, git_error_last(), NULL, NULL);
return result;
}
/**
* Get all references that can be found in a repository.
*
* @param repo S3 class git_repository
* @return VECXSP with S3 objects of class git_reference
*/
SEXP attribute_hidden
git2r_reference_list(
SEXP repo)
{
int error, nprotect = 0;
size_t i;
git_strarray ref_list;
SEXP result = R_NilValue;
SEXP names = R_NilValue;
git_repository *repository = NULL;
repository = git2r_repository_open(repo);
if (!repository)
git2r_error(__func__, NULL, git2r_err_invalid_repository, NULL);
error = git_reference_list(&ref_list, repository);
if (error)
goto cleanup;
PROTECT(result = Rf_allocVector(VECSXP, ref_list.count));
nprotect++;
Rf_setAttrib(
result,
R_NamesSymbol,
names = Rf_allocVector(STRSXP, ref_list.count));
for (i = 0; i < ref_list.count; i++) {
SEXP reference;
git_reference *ref = NULL;
error = git_reference_lookup(&ref, repository, ref_list.strings[i]);
if (error)
goto cleanup;
SET_VECTOR_ELT(
result,
i,
reference = Rf_mkNamed(VECSXP, git2r_S3_items__git_reference));
Rf_setAttrib(reference, R_ClassSymbol,
Rf_mkString(git2r_S3_class__git_reference));
git2r_reference_init(ref, repo, reference);
SET_STRING_ELT(names, i, Rf_mkChar(ref_list.strings[i]));
git_reference_free(ref);
}
cleanup:
git_strarray_free(&ref_list);
git_repository_free(repository);
if (nprotect)
UNPROTECT(nprotect);
if (error)
git2r_error(__func__, git_error_last(), NULL, NULL);
return result;
}
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