thodg/libgit2/examples/fetch.c

• Show log

  Commit

• Hash : dbc4ac1c
  Author :
  Date : 2022-01-22T23:10:03
  

  oid: `GIT_OID_*SZ` is now `GIT_OID_SHA1_*SIZE` In preparation for SHA256 support, `GIT_OID_RAWSZ` and `GIT_OID_HEXSZ` need to indicate that they're the size of _SHA1_ OIDs.

Download

• examples/fetch.c

• #include "common.h"
  
  static int progress_cb(const char *str, int len, void *data)
  {
  	(void)data;
  	printf("remote: %.*s", len, str);
  	fflush(stdout); /* We don't have the \n to force the flush */
  	return 0;
  }
  
  /**
   * This function gets called for each remote-tracking branch that gets
   * updated. The message we output depends on whether it's a new one or
   * an update.
   */
  static int update_cb(const char *refname, const git_oid *a, const git_oid *b, void *data)
  {
  	char a_str[GIT_OID_SHA1_HEXSIZE+1], b_str[GIT_OID_SHA1_HEXSIZE+1];
  	(void)data;
  
  	git_oid_fmt(b_str, b);
  	b_str[GIT_OID_SHA1_HEXSIZE] = '\0';
  
  	if (git_oid_is_zero(a)) {
  		printf("[new]     %.20s %s\n", b_str, refname);
  	} else {
  		git_oid_fmt(a_str, a);
  		a_str[GIT_OID_SHA1_HEXSIZE] = '\0';
  		printf("[updated] %.10s..%.10s %s\n", a_str, b_str, refname);
  	}
  
  	return 0;
  }
  
  /**
   * This gets called during the download and indexing. Here we show
   * processed and total objects in the pack and the amount of received
   * data. Most frontends will probably want to show a percentage and
   * the download rate.
   */
  static int transfer_progress_cb(const git_indexer_progress *stats, void *payload)
  {
  	(void)payload;
  
  	if (stats->received_objects == stats->total_objects) {
  		printf("Resolving deltas %u/%u\r",
  		       stats->indexed_deltas, stats->total_deltas);
  	} else if (stats->total_objects > 0) {
  		printf("Received %u/%u objects (%u) in %" PRIuZ " bytes\r",
  		       stats->received_objects, stats->total_objects,
  		       stats->indexed_objects, stats->received_bytes);
  	}
  	return 0;
  }
  
  /** Entry point for this command */
  int lg2_fetch(git_repository *repo, int argc, char **argv)
  {
  	git_remote *remote = NULL;
  	const git_indexer_progress *stats;
  	git_fetch_options fetch_opts = GIT_FETCH_OPTIONS_INIT;
  
  	if (argc < 2) {
  		fprintf(stderr, "usage: %s fetch <repo>\n", argv[-1]);
  		return EXIT_FAILURE;
  	}
  
  	/* Figure out whether it's a named remote or a URL */
  	printf("Fetching %s for repo %p\n", argv[1], repo);
  	if (git_remote_lookup(&remote, repo, argv[1]) < 0)
  		if (git_remote_create_anonymous(&remote, repo, argv[1]) < 0)
  			goto on_error;
  
  	/* Set up the callbacks (only update_tips for now) */
  	fetch_opts.callbacks.update_tips = &update_cb;
  	fetch_opts.callbacks.sideband_progress = &progress_cb;
  	fetch_opts.callbacks.transfer_progress = transfer_progress_cb;
  	fetch_opts.callbacks.credentials = cred_acquire_cb;
  
  	/**
  	 * Perform the fetch with the configured refspecs from the
  	 * config. Update the reflog for the updated references with
  	 * "fetch".
  	 */
  	if (git_remote_fetch(remote, NULL, &fetch_opts, "fetch") < 0)
  		goto on_error;
  
  	/**
  	 * If there are local objects (we got a thin pack), then tell
  	 * the user how many objects we saved from having to cross the
  	 * network.
  	 */
  	stats = git_remote_stats(remote);
  	if (stats->local_objects > 0) {
  		printf("\rReceived %u/%u objects in %" PRIuZ " bytes (used %u local objects)\n",
  		       stats->indexed_objects, stats->total_objects, stats->received_bytes, stats->local_objects);
  	} else{
  		printf("\rReceived %u/%u objects in %" PRIuZ "bytes\n",
  			stats->indexed_objects, stats->total_objects, stats->received_bytes);
  	}
  
  	git_remote_free(remote);
  
  	return 0;
  
   on_error:
  	git_remote_free(remote);
  	return -1;
  }
  

Download