thodg/libgit2/src/diff_print.c

• Show log

  Commit

• Hash : e4acc3ba
  Author :
  Date : 2013-06-18T16:14:35
  

  Fix rename looped reference issues This makes the diff rename tracking code more careful about the order in which it processes renames and more thorough in updating the mapping of correct renames when an earlier rename update alters the index of a later matched pair.

Download

• src/diff_print.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 "common.h"
  #include "diff.h"
  #include "diff_patch.h"
  #include "buffer.h"
  
  typedef struct {
  	git_diff_list *diff;
  	git_diff_data_cb print_cb;
  	void *payload;
  	git_buf *buf;
  	int oid_strlen;
  } diff_print_info;
  
  static int diff_print_info_init(
  	diff_print_info *pi,
  	git_buf *out, git_diff_list *diff, git_diff_data_cb cb, void *payload)
  {
  	pi->diff     = diff;
  	pi->print_cb = cb;
  	pi->payload  = payload;
  	pi->buf      = out;
  
  	if (!diff || !diff->repo)
  		pi->oid_strlen = GIT_ABBREV_DEFAULT;
  	else if (git_repository__cvar(
  		&pi->oid_strlen, diff->repo, GIT_CVAR_ABBREV) < 0)
  		return -1;
  
  	pi->oid_strlen += 1; /* for NUL byte */
  
  	if (pi->oid_strlen < 2)
  		pi->oid_strlen = 2;
  	else if (pi->oid_strlen > GIT_OID_HEXSZ + 1)
  		pi->oid_strlen = GIT_OID_HEXSZ + 1;
  
  	return 0;
  }
  
  static char diff_pick_suffix(int mode)
  {
  	if (S_ISDIR(mode))
  		return '/';
  	else if (mode & 0100) /* -V536 */
  		/* in git, modes are very regular, so we must have 0100755 mode */
  		return '*';
  	else
  		return ' ';
  }
  
  char git_diff_status_char(git_delta_t status)
  {
  	char code;
  
  	switch (status) {
  	case GIT_DELTA_ADDED:     code = 'A'; break;
  	case GIT_DELTA_DELETED:   code = 'D'; break;
  	case GIT_DELTA_MODIFIED:  code = 'M'; break;
  	case GIT_DELTA_RENAMED:   code = 'R'; break;
  	case GIT_DELTA_COPIED:    code = 'C'; break;
  	case GIT_DELTA_IGNORED:   code = 'I'; break;
  	case GIT_DELTA_UNTRACKED: code = '?'; break;
  	default:                  code = ' '; break;
  	}
  
  	return code;
  }
  
  static int callback_error(void)
  {
  	giterr_clear();
  	return GIT_EUSER;
  }
  
  static int diff_print_one_compact(
  	const git_diff_delta *delta, float progress, void *data)
  {
  	diff_print_info *pi = data;
  	git_buf *out = pi->buf;
  	char old_suffix, new_suffix, code = git_diff_status_char(delta->status);
  	int (*strcomp)(const char *, const char *) =
  		pi->diff ? pi->diff->strcomp : git__strcmp;
  
  	GIT_UNUSED(progress);
  
  	if (code == ' ')
  		return 0;
  
  	old_suffix = diff_pick_suffix(delta->old_file.mode);
  	new_suffix = diff_pick_suffix(delta->new_file.mode);
  
  	git_buf_clear(out);
  
  	if (delta->old_file.path != delta->new_file.path &&
  		strcomp(delta->old_file.path,delta->new_file.path) != 0)
  		git_buf_printf(out, "%c\t%s%c -> %s%c\n", code,
  			delta->old_file.path, old_suffix, delta->new_file.path, new_suffix);
  	else if (delta->old_file.mode != delta->new_file.mode &&
  		delta->old_file.mode != 0 && delta->new_file.mode != 0)
  		git_buf_printf(out, "%c\t%s%c (%o -> %o)\n", code,
  			delta->old_file.path, new_suffix, delta->old_file.mode, delta->new_file.mode);
  	else if (old_suffix != ' ')
  		git_buf_printf(out, "%c\t%s%c\n", code, delta->old_file.path, old_suffix);
  	else
  		git_buf_printf(out, "%c\t%s\n", code, delta->old_file.path);
  
  	if (git_buf_oom(out))
  		return -1;
  
  	if (pi->print_cb(delta, NULL, GIT_DIFF_LINE_FILE_HDR,
  			git_buf_cstr(out), git_buf_len(out), pi->payload))
  		return callback_error();
  
  	return 0;
  }
  
  /* print a git_diff_list to a print callback in compact format */
  int git_diff_print_compact(
  	git_diff_list *diff,
  	git_diff_data_cb print_cb,
  	void *payload)
  {
  	int error;
  	git_buf buf = GIT_BUF_INIT;
  	diff_print_info pi;
  
  	if (!(error = diff_print_info_init(&pi, &buf, diff, print_cb, payload)))
  		error = git_diff_foreach(diff, diff_print_one_compact, NULL, NULL, &pi);
  
  	git_buf_free(&buf);
  
  	return error;
  }
  
  static int diff_print_one_raw(
  	const git_diff_delta *delta, float progress, void *data)
  {
  	diff_print_info *pi = data;
  	git_buf *out = pi->buf;
  	char code = git_diff_status_char(delta->status);
  	char start_oid[GIT_OID_HEXSZ+1], end_oid[GIT_OID_HEXSZ+1];
  
  	GIT_UNUSED(progress);
  
  	if (code == ' ')
  		return 0;
  
  	git_buf_clear(out);
  
  	git_oid_tostr(start_oid, pi->oid_strlen, &delta->old_file.oid);
  	git_oid_tostr(end_oid, pi->oid_strlen, &delta->new_file.oid);
  
  	git_buf_printf(
  		out, ":%06o %06o %s... %s... %c",
  		delta->old_file.mode, delta->new_file.mode, start_oid, end_oid, code);
  
  	if (delta->similarity > 0)
  		git_buf_printf(out, "%03u", delta->similarity);
  
  	if (delta->old_file.path != delta->new_file.path)
  		git_buf_printf(
  			out, "\t%s %s\n", delta->old_file.path, delta->new_file.path);
  	else
  		git_buf_printf(
  			out, "\t%s\n", delta->old_file.path ?
  			delta->old_file.path : delta->new_file.path);
  
  	if (git_buf_oom(out))
  		return -1;
  
  	if (pi->print_cb(delta, NULL, GIT_DIFF_LINE_FILE_HDR,
  			git_buf_cstr(out), git_buf_len(out), pi->payload))
  		return callback_error();
  
  	return 0;
  }
  
  /* print a git_diff_list to a print callback in raw output format */
  int git_diff_print_raw(
  	git_diff_list *diff,
  	git_diff_data_cb print_cb,
  	void *payload)
  {
  	int error;
  	git_buf buf = GIT_BUF_INIT;
  	diff_print_info pi;
  
  	if (!(error = diff_print_info_init(&pi, &buf, diff, print_cb, payload)))
  		error = git_diff_foreach(diff, diff_print_one_raw, NULL, NULL, &pi);
  
  	git_buf_free(&buf);
  
  	return error;
  }
  
  static int diff_print_oid_range(diff_print_info *pi, const git_diff_delta *delta)
  {
  	git_buf *out = pi->buf;
  	char start_oid[GIT_OID_HEXSZ+1], end_oid[GIT_OID_HEXSZ+1];
  
  	git_oid_tostr(start_oid, pi->oid_strlen, &delta->old_file.oid);
  	git_oid_tostr(end_oid, pi->oid_strlen, &delta->new_file.oid);
  
  	/* TODO: Match git diff more closely */
  	if (delta->old_file.mode == delta->new_file.mode) {
  		git_buf_printf(out, "index %s..%s %o\n",
  			start_oid, end_oid, delta->old_file.mode);
  	} else {
  		if (delta->old_file.mode == 0) {
  			git_buf_printf(out, "new file mode %o\n", delta->new_file.mode);
  		} else if (delta->new_file.mode == 0) {
  			git_buf_printf(out, "deleted file mode %o\n", delta->old_file.mode);
  		} else {
  			git_buf_printf(out, "old mode %o\n", delta->old_file.mode);
  			git_buf_printf(out, "new mode %o\n", delta->new_file.mode);
  		}
  		git_buf_printf(out, "index %s..%s\n", start_oid, end_oid);
  	}
  
  	if (git_buf_oom(out))
  		return -1;
  
  	return 0;
  }
  
  static int diff_print_patch_file(
  	const git_diff_delta *delta, float progress, void *data)
  {
  	diff_print_info *pi = data;
  	const char *oldpfx = pi->diff ? pi->diff->opts.old_prefix : NULL;
  	const char *oldpath = delta->old_file.path;
  	const char *newpfx = pi->diff ? pi->diff->opts.new_prefix : NULL;
  	const char *newpath = delta->new_file.path;
  	uint32_t opts_flags = pi->diff ? pi->diff->opts.flags : GIT_DIFF_NORMAL;
  
  	GIT_UNUSED(progress);
  
  	if (S_ISDIR(delta->new_file.mode) ||
  		delta->status == GIT_DELTA_UNMODIFIED ||
  		delta->status == GIT_DELTA_IGNORED ||
  		(delta->status == GIT_DELTA_UNTRACKED &&
  		 (opts_flags & GIT_DIFF_INCLUDE_UNTRACKED_CONTENT) == 0))
  		return 0;
  
  	if (!oldpfx)
  		oldpfx = DIFF_OLD_PREFIX_DEFAULT;
  	if (!newpfx)
  		newpfx = DIFF_NEW_PREFIX_DEFAULT;
  
  	git_buf_clear(pi->buf);
  	git_buf_printf(pi->buf, "diff --git %s%s %s%s\n",
  		oldpfx, delta->old_file.path, newpfx, delta->new_file.path);
  
  	if (diff_print_oid_range(pi, delta) < 0)
  		return -1;
  
  	if (git_oid_iszero(&delta->old_file.oid)) {
  		oldpfx = "";
  		oldpath = "/dev/null";
  	}
  	if (git_oid_iszero(&delta->new_file.oid)) {
  		newpfx = "";
  		newpath = "/dev/null";
  	}
  
  	if ((delta->flags & GIT_DIFF_FLAG_BINARY) == 0) {
  		git_buf_printf(pi->buf, "--- %s%s\n", oldpfx, oldpath);
  		git_buf_printf(pi->buf, "+++ %s%s\n", newpfx, newpath);
  	}
  
  	if (git_buf_oom(pi->buf))
  		return -1;
  
  	if (pi->print_cb(delta, NULL, GIT_DIFF_LINE_FILE_HDR,
  			git_buf_cstr(pi->buf), git_buf_len(pi->buf), pi->payload))
  		return callback_error();
  
  	if ((delta->flags & GIT_DIFF_FLAG_BINARY) == 0)
  		return 0;
  
  	git_buf_clear(pi->buf);
  	git_buf_printf(
  		pi->buf, "Binary files %s%s and %s%s differ\n",
  		oldpfx, oldpath, newpfx, newpath);
  	if (git_buf_oom(pi->buf))
  		return -1;
  
  	if (pi->print_cb(delta, NULL, GIT_DIFF_LINE_BINARY,
  			git_buf_cstr(pi->buf), git_buf_len(pi->buf), pi->payload))
  		return callback_error();
  
  	return 0;
  }
  
  static int diff_print_patch_hunk(
  	const git_diff_delta *d,
  	const git_diff_range *r,
  	const char *header,
  	size_t header_len,
  	void *data)
  {
  	diff_print_info *pi = data;
  
  	if (S_ISDIR(d->new_file.mode))
  		return 0;
  
  	git_buf_clear(pi->buf);
  	if (git_buf_printf(pi->buf, "%.*s", (int)header_len, header) < 0)
  		return -1;
  
  	if (pi->print_cb(d, r, GIT_DIFF_LINE_HUNK_HDR,
  			git_buf_cstr(pi->buf), git_buf_len(pi->buf), pi->payload))
  		return callback_error();
  
  	return 0;
  }
  
  static int diff_print_patch_line(
  	const git_diff_delta *delta,
  	const git_diff_range *range,
  	char line_origin, /* GIT_DIFF_LINE value from above */
  	const char *content,
  	size_t content_len,
  	void *data)
  {
  	diff_print_info *pi = data;
  
  	if (S_ISDIR(delta->new_file.mode))
  		return 0;
  
  	git_buf_clear(pi->buf);
  
  	if (line_origin == GIT_DIFF_LINE_ADDITION ||
  		line_origin == GIT_DIFF_LINE_DELETION ||
  		line_origin == GIT_DIFF_LINE_CONTEXT)
  		git_buf_printf(pi->buf, "%c%.*s", line_origin, (int)content_len, content);
  	else if (content_len > 0)
  		git_buf_printf(pi->buf, "%.*s", (int)content_len, content);
  
  	if (git_buf_oom(pi->buf))
  		return -1;
  
  	if (pi->print_cb(delta, range, line_origin,
  			git_buf_cstr(pi->buf), git_buf_len(pi->buf), pi->payload))
  		return callback_error();
  
  	return 0;
  }
  
  /* print a git_diff_list to an output callback in patch format */
  int git_diff_print_patch(
  	git_diff_list *diff,
  	git_diff_data_cb print_cb,
  	void *payload)
  {
  	int error;
  	git_buf buf = GIT_BUF_INIT;
  	diff_print_info pi;
  
  	if (!(error = diff_print_info_init(&pi, &buf, diff, print_cb, payload)))
  		error = git_diff_foreach(
  			diff, diff_print_patch_file, diff_print_patch_hunk,
  			diff_print_patch_line, &pi);
  
  	git_buf_free(&buf);
  
  	return error;
  }
  
  /* print a git_diff_patch to an output callback */
  int git_diff_patch_print(
  	git_diff_patch *patch,
  	git_diff_data_cb print_cb,
  	void *payload)
  {
  	int error;
  	git_buf temp = GIT_BUF_INIT;
  	diff_print_info pi;
  
  	assert(patch && print_cb);
  
  	if (!(error = diff_print_info_init(
  			&pi, &temp, git_diff_patch__diff(patch), print_cb, payload)))
  		error = git_diff_patch__invoke_callbacks(
  			patch, diff_print_patch_file, diff_print_patch_hunk,
  			diff_print_patch_line, &pi);
  
  	git_buf_free(&temp);
  
  	return error;
  }
  
  static int diff_print_to_buffer_cb(
  	const git_diff_delta *delta,
  	const git_diff_range *range,
  	char line_origin,
  	const char *content,
  	size_t content_len,
  	void *payload)
  {
  	git_buf *output = payload;
  	GIT_UNUSED(delta); GIT_UNUSED(range); GIT_UNUSED(line_origin);
  	return git_buf_put(output, content, content_len);
  }
  
  /* print a git_diff_patch to a string buffer */
  int git_diff_patch_to_str(
  	char **string,
  	git_diff_patch *patch)
  {
  	int error;
  	git_buf output = GIT_BUF_INIT;
  
  	error = git_diff_patch_print(patch, diff_print_to_buffer_cb, &output);
  
  	/* GIT_EUSER means git_buf_put in print_to_buffer_cb returned -1,
  	 * meaning a memory allocation failure, so just map to -1...
  	 */
  	if (error == GIT_EUSER)
  		error = -1;
  
  	*string = git_buf_detach(&output);
  
  	return error;
  }
  

Download