Add a remotes API

Signed-off-by: Carlos Martín Nieto <carlos@cmartin.tk>

include/git2.h

@@ -54,4 +54,7 @@
 #include "git2/index.h"
 #include "git2/config.h"
 
+#include "git2/remote.h"
+#include "git2/refspec.h"
+
 #endif

include/git2/branch.h

+#ifndef INCLUDE_branch_h__
+#define INCLUDE_branch_h__
+
+struct git_branch {
+	char *remote; /* TODO: Make this a git_remote */
+	char *merge;
+};
+
+#endif

include/git2/refspec.h

+#ifndef INCLUDE_git_refspec_h__
+#define INCLUDE_git_refspec_h__
+
+#include "git2/types.h"
+
+/**
+ * Get the source specifier
+ *
+ * @param refspec the refspec
+ * @return the refspec's source specifier
+ */
+const char *git_refspec_src(const git_refspec *refspec);
+
+/**
+ * Get the destination specifier
+ *
+ * @param refspec the refspec
+ * @return the refspec's destination specifier
+ */
+const char *git_refspec_dst(const git_refspec *refspec);
+
+#endif

include/git2/remote.h

+#ifndef INCLUDE_git_remote_h__
+#define INCLUDE_git_remote_h__
+
+#include "git2/common.h"
+#include "git2/repository.h"
+#include "git2/refspec.h"
+
+/**
+ * Get the information for a particular remote
+ *
+ * @param out pointer to the new remote object
+ * @param cfg the repository's configuration
+ * @param name the remote's name
+ * @return 0 on success; error value otherwise
+ */
+GIT_EXTERN(int) git_remote_get(struct git_remote **out, struct git_config *cfg, const char *name);
+
+/**
+ * Get the remote's name
+ *
+ * @param remote the remote
+ * @return a pointer to the name
+ */
+GIT_EXTERN(const char *) git_remote_name(struct git_remote *remote);
+
+/**
+ * Get the remote's url
+ *
+ * @param remote the remote
+ * @return a pointer to the url
+ */
+GIT_EXTERN(const char *) git_remote_url(struct git_remote *remote);
+
+/**
+ * Get the fetch refspec
+ *
+ * @param remote the remote
+ * @return a pointer to the fetch refspec or NULL if it doesn't exist
+ */
+GIT_EXTERN(const git_refspec *) git_remote_fetchspec(struct git_remote *remote);
+
+/**
+ * Get the push refspec
+ *
+ * @param remote the remote
+ * @return a pointer to the push refspec or NULL if it doesn't exist
+ */
+
+GIT_EXTERN(const git_refspec *) git_remote_fetchspec(struct git_remote *remote);
+
+/**
+ * Free the memory associated with a remote
+ *
+ * @param remote the remote to free
+ */
+GIT_EXTERN(void) git_remote_free(struct git_remote *remote);
+
+#endif

include/git2/types.h

@@ -167,6 +167,9 @@ typedef enum {
 	GIT_REF_LISTALL = GIT_REF_OID|GIT_REF_SYMBOLIC|GIT_REF_PACKED,
 } git_rtype;
 
+typedef struct git_refspec git_refspec;
+typedef struct git_remote git_remote;
+
 /** @} */
 GIT_END_DECL
 

src/refspec.c

+/*
+ * This file 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.
+ *
+ * In addition to the permissions in the GNU General Public License,
+ * the authors give you unlimited permission to link the compiled
+ * version of this file into combinations with other programs,
+ * and to distribute those combinations without any restriction
+ * coming from the use of this file.  (The General Public License
+ * restrictions do apply in other respects; for example, they cover
+ * modification of the file, and distribution when not linked into
+ * a combined executable.)
+ *
+ * This file 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; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "common.h"
+#include "refspec.h"
+
+int git_refspec_parse(git_refspec *refspec, const char *str)
+{
+	char *delim;
+
+	memset(refspec, 0x0, sizeof(git_refspec));
+
+	if (*str == '+') {
+		refspec->force = 1;
+		str++;
+	}
+
+	delim = strchr(str, ':');
+	if (delim == NULL)
+		return git__throw(GIT_EOBJCORRUPTED, "Failed to parse refspec. No ':'");
+
+	refspec->src = git__strndup(str, delim - str);
+	if (refspec->src == NULL)
+		return GIT_ENOMEM;
+
+	refspec->dst = git__strdup(delim + 1);
+	if (refspec->dst == NULL) {
+		free(refspec->src);
+		refspec->src = NULL;
+		return GIT_ENOMEM;
+	}
+
+	return GIT_SUCCESS;
+}
+
+const char *git_refspec_src(const git_refspec *refspec)
+{
+	return refspec->src;
+}
+
+const char *git_refspec_dst(const git_refspec *refspec)
+{
+	return refspec->dst;
+}

src/refspec.h

+#ifndef INCLUDE_refspec_h__
+#define INCLUDE_refspec_h__
+
+#include "git2/refspec.h"
+
+struct git_refspec {
+	int force;
+	char *src;
+	char *dst;
+};
+
+int git_refspec_parse(struct git_refspec *refspec, const char *str);
+
+#endif

src/remote.c

+/*
+ * This file 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.
+ *
+ * In addition to the permissions in the GNU General Public License,
+ * the authors give you unlimited permission to link the compiled
+ * version of this file into combinations with other programs,
+ * and to distribute those combinations without any restriction
+ * coming from the use of this file.  (The General Public License
+ * restrictions do apply in other respects; for example, they cover
+ * modification of the file, and distribution when not linked into
+ * a combined executable.)
+ *
+ * This file 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; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "git2/remote.h"
+#include "git2/config.h"
+#include "git2/types.h"
+
+#include "config.h"
+#include "repository.h"
+#include "remote.h"
+
+static int refspec_parse(git_refspec *refspec, const char *str)
+{
+	char *delim;
+
+	memset(refspec, 0x0, sizeof(git_refspec));
+
+	if (*str == '+') {
+		refspec->force = 1;
+		str++;
+	}
+
+	delim = strchr(str, ':');
+	if (delim == NULL)
+		return git__throw(GIT_EOBJCORRUPTED, "Failed to parse refspec. No ':'");
+
+	refspec->src = git__strndup(str, delim - str);
+	if (refspec->src == NULL)
+		return GIT_ENOMEM;
+
+	refspec->dst = git__strdup(delim + 1);
+	if (refspec->dst == NULL) {
+		free(refspec->src);
+		refspec->src = NULL;
+		return GIT_ENOMEM;
+	}
+
+	return GIT_SUCCESS;
+}
+
+static int parse_remote_refspec(git_config *cfg, git_refspec *refspec, const char *var)
+{
+	const char *val;
+	int error;
+
+	error = git_config_get_string(cfg, var, &val);
+	if (error < GIT_SUCCESS)
+		return error;
+
+	return git_refspec_parse(refspec, val);
+}
+
+int git_remote_get(git_remote **out, git_config *cfg, const char *name)
+{
+	git_remote *remote;
+	char *buf = NULL;
+	const char *val;
+	int ret, error, buf_len;
+
+	remote = git__malloc(sizeof(git_remote));
+	if (remote == NULL)
+		return GIT_ENOMEM;
+
+	memset(remote, 0x0, sizeof(git_remote));
+	remote->name = git__strdup(name);
+	if (remote->name == NULL) {
+		error = GIT_ENOMEM;
+		goto cleanup;
+	}
+
+	/* "fetch" is the longest var name we're interested in */
+	buf_len = STRLEN("remote.") + STRLEN(".fetch") + strlen(name) + 1;
+	buf = git__malloc(buf_len);
+	if (buf == NULL) {
+		error = GIT_ENOMEM;
+		goto cleanup;
+	}
+
+	ret = snprintf(buf, buf_len, "%s.%s.%s", "remote", name, "url");
+	if (ret < 0) {
+		error = git__throw(GIT_EOSERR, "Failed to build config var name");
+		goto cleanup;
+	}
+
+	error = git_config_get_string(cfg, buf, &val);
+	if (error < GIT_SUCCESS) {
+		error = git__rethrow(error,  "Remote's url doesn't exist");
+		goto cleanup;
+	}
+
+	remote->url = git__strdup(val);
+	if (remote->url == NULL) {
+		error = GIT_ENOMEM;
+		goto cleanup;
+	}
+
+	ret = snprintf(buf, buf_len, "%s.%s.%s", "remote", name, "fetch");
+	if (ret < 0) {
+		error = git__throw(GIT_EOSERR, "Failed to build config var name");
+		goto cleanup;
+	}
+
+	error = git_config_get_string(cfg, buf, &val);
+	if (error < GIT_SUCCESS)
+		goto cleanup;
+
+	error = refspec_parse(&remote->fetch, val);
+	if (error < GIT_SUCCESS)
+		goto cleanup;
+
+	ret = snprintf(buf, buf_len, "%s.%s.%s", "remote", name, "push");
+	if (ret < 0) {
+		error = git__throw(GIT_EOSERR, "Failed to build config var name");
+		goto cleanup;
+	}
+
+	error = git_config_get_string(cfg, buf, &val);
+	if (error < GIT_SUCCESS)
+		goto cleanup;
+
+	error = refspec_parse(&remote->push, val);
+	if (error < GIT_SUCCESS)
+		goto cleanup;
+
+	*out = remote;
+
+cleanup:
+	free(buf);
+	if (error < GIT_SUCCESS)
+		git_remote_free(remote);
+
+	return error;
+}
+
+const char *git_remote_name(struct git_remote *remote)
+{
+	return remote->name;
+}
+
+const char *git_remote_url(struct git_remote *remote)
+{
+	return remote->url;
+}
+
+const git_refspec *git_remote_fetchspec(struct git_remote *remote)
+{
+	return &remote->fetch;
+}
+
+const git_refspec *git_remote_pushspec(struct git_remote *remote)
+{
+	return &remote->push;
+}
+
+void git_remote_free(git_remote *remote)
+{
+	free(remote->fetch.src);
+	free(remote->fetch.dst);
+	free(remote->push.src);
+	free(remote->push.dst);
+	free(remote->url);
+	free(remote->name);
+	free(remote);
+}

src/remote.h

+#ifndef INCLUDE_remote_h__
+#define INCLUDE_remote_h__
+
+#include "remote.h"
+#include "refspec.h"
+
+struct git_remote {
+	char *name;
+	char *url;
+	struct git_refspec fetch;
+	struct git_refspec push;
+};
+
+#endif