thodg/libgit2/examples/network/ls-remote.c

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• Hash : 24012627
  Author :
  Date : 2011-10-03T00:33:13
  

  examples: add ls-remote, fetch and index-pack examples Signed-off-by: Carlos Martín Nieto <carlos@cmartin.tk>

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• examples/network/ls-remote.c

• #include <git2.h>
  #include <stdlib.h>
  #include <stdio.h>
  #include <string.h>
  #include "common.h"
  
  static void show_refs(git_headarray *refs)
  {
  	int i;
  	git_remote_head *head;
  
  // Take each head that the remote has advertised, store the string
  // representation of the OID in a buffer and print it
  
  	for(i = 0; i < refs->len; ++i){
  		char oid[GIT_OID_HEXSZ + 1] = {0};
  		head = refs->heads[i];
  		git_oid_fmt(oid, &head->oid);
  		printf("%s\t%s\n", oid, head->name);
  	}
  }
  
  int use_unnamed(git_repository *repo, const char *url)
  {
  	git_remote *remote = NULL;
  	git_headarray refs;
  	int error;
  
  	// Create an instance of a remote from the URL. The transport to use
  	// is detected from the URL
  	error = git_remote_new(&remote, repo, url);
  	if (error < GIT_SUCCESS)
  		goto cleanup;
  
  	// When connecting, the underlying code needs to know wether we
  	// want to push or fetch
  	error = git_remote_connect(remote, GIT_DIR_FETCH);
  	if (error < GIT_SUCCESS)
  		goto cleanup;
  
  	// With git_remote_ls we can retrieve the advertised heads
  	error = git_remote_ls(remote, &refs);
  	if (error < GIT_SUCCESS)
  		goto cleanup;
  
  	show_refs(&refs);
  
  cleanup:
  	git_remote_free(remote);
  
  	return error;
  }
  
  int use_remote(git_repository *repo, char *name)
  {
  	git_remote *remote = NULL;
  	git_config *cfg = NULL;
  	git_headarray refs;
  	int error;
  
  	// Load the local configuration for the repository
  	error = git_repository_config(&cfg, repo, NULL, NULL);
  	if (error < GIT_SUCCESS)
  		return error;
  
  	// Find the remote by name
  	error = git_remote_get(&remote, cfg, name);
  	if (error < GIT_SUCCESS)
  		goto cleanup;
  
  	error = git_remote_connect(remote, GIT_DIR_FETCH);
  	if (error < GIT_SUCCESS)
  		goto cleanup;
  
  	error = git_remote_ls(remote, &refs);
  	if (error < GIT_SUCCESS)
  		goto cleanup;
  
  	show_refs(&refs);
  
  cleanup:
  	git_remote_free(remote);
  
  	return error;
  }
  
  // This gets called to do the work. The remote can be given either as
  // the name of a configured remote or an URL.
  
  int ls_remote(git_repository *repo, int argc, char **argv)
  {
  	git_headarray heads;
  	git_remote_head *head;
  	int error, i;
  
  	/* If there's a ':' in the name, assume it's an URL */
  	if (strchr(argv[1], ':') != NULL) {
  		error = use_unnamed(repo, argv[1]);
  	} else {
  		error = use_remote(repo, argv[1]);
  	}
  
  	return error;
  }
  

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