thodg/libgit2/src/diff.c

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• Hash : ba3595af
  Author :
  Date : 2021-09-13T16:25:00
  

  diff: deprecate diff_format_email `git_diff_format_email` is deprecated in favor of `git_email_create`.

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• src/diff.c

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  
  #include "diff.h"
  
  #include "common.h"
  #include "patch.h"
  #include "email.h"
  #include "commit.h"
  #include "index.h"
  #include "diff_generate.h"
  
  #include "git2/version.h"
  #include "git2/email.h"
  
  struct patch_id_args {
  	git_hash_ctx ctx;
  	git_oid result;
  	int first_file;
  };
  
  GIT_INLINE(const char *) diff_delta__path(const git_diff_delta *delta)
  {
  	const char *str = delta->old_file.path;
  
  	if (!str ||
  		delta->status == GIT_DELTA_ADDED ||
  		delta->status == GIT_DELTA_RENAMED ||
  		delta->status == GIT_DELTA_COPIED)
  		str = delta->new_file.path;
  
  	return str;
  }
  
  int git_diff_delta__cmp(const void *a, const void *b)
  {
  	const git_diff_delta *da = a, *db = b;
  	int val = strcmp(diff_delta__path(da), diff_delta__path(db));
  	return val ? val : ((int)da->status - (int)db->status);
  }
  
  int git_diff_delta__casecmp(const void *a, const void *b)
  {
  	const git_diff_delta *da = a, *db = b;
  	int val = strcasecmp(diff_delta__path(da), diff_delta__path(db));
  	return val ? val : ((int)da->status - (int)db->status);
  }
  
  int git_diff__entry_cmp(const void *a, const void *b)
  {
  	const git_index_entry *entry_a = a;
  	const git_index_entry *entry_b = b;
  
  	return strcmp(entry_a->path, entry_b->path);
  }
  
  int git_diff__entry_icmp(const void *a, const void *b)
  {
  	const git_index_entry *entry_a = a;
  	const git_index_entry *entry_b = b;
  
  	return strcasecmp(entry_a->path, entry_b->path);
  }
  
  void git_diff_free(git_diff *diff)
  {
  	if (!diff)
  		return;
  
  	GIT_REFCOUNT_DEC(diff, diff->free_fn);
  }
  
  void git_diff_addref(git_diff *diff)
  {
  	GIT_REFCOUNT_INC(diff);
  }
  
  size_t git_diff_num_deltas(const git_diff *diff)
  {
  	GIT_ASSERT_ARG(diff);
  	return diff->deltas.length;
  }
  
  size_t git_diff_num_deltas_of_type(const git_diff *diff, git_delta_t type)
  {
  	size_t i, count = 0;
  	const git_diff_delta *delta;
  
  	GIT_ASSERT_ARG(diff);
  
  	git_vector_foreach(&diff->deltas, i, delta) {
  		count += (delta->status == type);
  	}
  
  	return count;
  }
  
  const git_diff_delta *git_diff_get_delta(const git_diff *diff, size_t idx)
  {
  	GIT_ASSERT_ARG_WITH_RETVAL(diff, NULL);
  	return git_vector_get(&diff->deltas, idx);
  }
  
  int git_diff_is_sorted_icase(const git_diff *diff)
  {
  	return (diff->opts.flags & GIT_DIFF_IGNORE_CASE) != 0;
  }
  
  int git_diff_get_perfdata(git_diff_perfdata *out, const git_diff *diff)
  {
  	GIT_ASSERT_ARG(out);
  	GIT_ERROR_CHECK_VERSION(out, GIT_DIFF_PERFDATA_VERSION, "git_diff_perfdata");
  	out->stat_calls = diff->perf.stat_calls;
  	out->oid_calculations = diff->perf.oid_calculations;
  	return 0;
  }
  
  int git_diff_foreach(
  	git_diff *diff,
  	git_diff_file_cb file_cb,
  	git_diff_binary_cb binary_cb,
  	git_diff_hunk_cb hunk_cb,
  	git_diff_line_cb data_cb,
  	void *payload)
  {
  	int error = 0;
  	git_diff_delta *delta;
  	size_t idx;
  
  	GIT_ASSERT_ARG(diff);
  
  	git_vector_foreach(&diff->deltas, idx, delta) {
  		git_patch *patch;
  
  		/* check flags against patch status */
  		if (git_diff_delta__should_skip(&diff->opts, delta))
  			continue;
  
  		if ((error = git_patch_from_diff(&patch, diff, idx)) != 0)
  			break;
  
  		error = git_patch__invoke_callbacks(patch, file_cb, binary_cb,
  						    hunk_cb, data_cb, payload);
  		git_patch_free(patch);
  
  		if (error)
  			break;
  	}
  
  	return error;
  }
  
  #ifndef GIT_DEPRECATE_HARD
  
  int git_diff_format_email(
  	git_buf *out,
  	git_diff *diff,
  	const git_diff_format_email_options *opts)
  {
  	git_email_create_options email_create_opts = GIT_EMAIL_CREATE_OPTIONS_INIT;
  	int error;
  
  	GIT_ASSERT_ARG(out);
  	GIT_ASSERT_ARG(diff);
  	GIT_ASSERT_ARG(opts && opts->summary && opts->id && opts->author);
  
  	GIT_ERROR_CHECK_VERSION(opts,
  		GIT_DIFF_FORMAT_EMAIL_OPTIONS_VERSION,
  		"git_format_email_options");
  
  	if ((opts->flags & GIT_DIFF_FORMAT_EMAIL_EXCLUDE_SUBJECT_PATCH_MARKER) != 0)
  		email_create_opts.subject_prefix = "";
  
  
  	error = git_email__append_from_diff(out, diff, opts->patch_no,
  		opts->total_patches, opts->id, opts->summary, opts->body,
  		opts->author, &email_create_opts);
  
  	return error;
  }
  
  int git_diff_commit_as_email(
  	git_buf *out,
  	git_repository *repo,
  	git_commit *commit,
  	size_t patch_no,
  	size_t total_patches,
  	uint32_t flags,
  	const git_diff_options *diff_opts)
  {
  	git_diff *diff = NULL;
  	git_email_create_options opts = GIT_EMAIL_CREATE_OPTIONS_INIT;
  	const git_oid *commit_id;
  	const char *summary, *body;
  	const git_signature *author;
  	int error;
  
  	GIT_ASSERT_ARG(out);
  	GIT_ASSERT_ARG(repo);
  	GIT_ASSERT_ARG(commit);
  
  	commit_id = git_commit_id(commit);
  	summary = git_commit_summary(commit);
  	body = git_commit_body(commit);
  	author = git_commit_author(commit);
  
  	if ((flags & GIT_DIFF_FORMAT_EMAIL_EXCLUDE_SUBJECT_PATCH_MARKER) != 0)
  		opts.subject_prefix = "";
  
  	if ((error = git_diff__commit(&diff, repo, commit, diff_opts)) < 0)
  		return error;
  
  	error = git_email_create_from_diff(out, diff, patch_no, total_patches, commit_id, summary, body, author, &opts);
  
  	git_diff_free(diff);
  	return error;
  }
  
  int git_diff_init_options(git_diff_options *opts, unsigned int version)
  {
  	return git_diff_options_init(opts, version);
  }
  
  int git_diff_find_init_options(
  	git_diff_find_options *opts, unsigned int version)
  {
  	return git_diff_find_options_init(opts, version);
  }
  
  int git_diff_format_email_options_init(
  	git_diff_format_email_options *opts, unsigned int version)
  {
  	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
  		opts, version, git_diff_format_email_options,
  		GIT_DIFF_FORMAT_EMAIL_OPTIONS_INIT);
  	return 0;
  }
  
  int git_diff_format_email_init_options(
  	git_diff_format_email_options *opts, unsigned int version)
  {
  	return git_diff_format_email_options_init(opts, version);
  }
  
  #endif
  
  int git_diff_options_init(git_diff_options *opts, unsigned int version)
  {
  	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
  		opts, version, git_diff_options, GIT_DIFF_OPTIONS_INIT);
  	return 0;
  }
  
  int git_diff_find_options_init(
  	git_diff_find_options *opts, unsigned int version)
  {
  	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
  		opts, version, git_diff_find_options, GIT_DIFF_FIND_OPTIONS_INIT);
  	return 0;
  }
  
  static int flush_hunk(git_oid *result, git_hash_ctx *ctx)
  {
  	git_oid hash;
  	unsigned short carry = 0;
  	int error, i;
  
  	if ((error = git_hash_final(&hash, ctx)) < 0 ||
  	    (error = git_hash_init(ctx)) < 0)
  		return error;
  
  	for (i = 0; i < GIT_OID_RAWSZ; i++) {
  		carry += result->id[i] + hash.id[i];
  		result->id[i] = (unsigned char)carry;
  		carry >>= 8;
  	}
  
  	return 0;
  }
  
  static void strip_spaces(git_buf *buf)
  {
  	char *src = buf->ptr, *dst = buf->ptr;
  	char c;
  	size_t len = 0;
  
  	while ((c = *src++) != '\0') {
  		if (!git__isspace(c)) {
  			*dst++ = c;
  			len++;
  		}
  	}
  
  	git_buf_truncate(buf, len);
  }
  
  static int diff_patchid_print_callback_to_buf(
  	const git_diff_delta *delta,
  	const git_diff_hunk *hunk,
  	const git_diff_line *line,
  	void *payload)
  {
  	struct patch_id_args *args = (struct patch_id_args *) payload;
  	git_buf buf = GIT_BUF_INIT;
  	int error = 0;
  
  	if (line->origin == GIT_DIFF_LINE_CONTEXT_EOFNL ||
  	    line->origin == GIT_DIFF_LINE_ADD_EOFNL ||
  	    line->origin == GIT_DIFF_LINE_DEL_EOFNL)
  		goto out;
  
  	if ((error = git_diff_print_callback__to_buf(delta, hunk,
  						     line, &buf)) < 0)
  		goto out;
  
  	strip_spaces(&buf);
  
  	if (line->origin == GIT_DIFF_LINE_FILE_HDR &&
  	    !args->first_file &&
  	    (error = flush_hunk(&args->result, &args->ctx) < 0))
  			goto out;
  
  	if ((error = git_hash_update(&args->ctx, buf.ptr, buf.size)) < 0)
  		goto out;
  
  	if (line->origin == GIT_DIFF_LINE_FILE_HDR && args->first_file)
  		args->first_file = 0;
  
  out:
  	git_buf_dispose(&buf);
  	return error;
  }
  
  int git_diff_patchid_options_init(git_diff_patchid_options *opts, unsigned int version)
  {
  	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
  		opts, version, git_diff_patchid_options, GIT_DIFF_PATCHID_OPTIONS_INIT);
  	return 0;
  }
  
  int git_diff_patchid(git_oid *out, git_diff *diff, git_diff_patchid_options *opts)
  {
  	struct patch_id_args args;
  	int error;
  
  	GIT_ERROR_CHECK_VERSION(
  		opts, GIT_DIFF_PATCHID_OPTIONS_VERSION, "git_diff_patchid_options");
  
  	memset(&args, 0, sizeof(args));
  	args.first_file = 1;
  	if ((error = git_hash_ctx_init(&args.ctx)) < 0)
  		goto out;
  
  	if ((error = git_diff_print(diff,
  				    GIT_DIFF_FORMAT_PATCH_ID,
  				    diff_patchid_print_callback_to_buf,
  				    &args)) < 0)
  		goto out;
  
  	if ((error = (flush_hunk(&args.result, &args.ctx))) < 0)
  		goto out;
  
  	git_oid_cpy(out, &args.result);
  
  out:
  	git_hash_ctx_cleanup(&args.ctx);
  	return error;
  }
  

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