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664 lines (540 loc) · 16.4 KB
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/*
* 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 "fileops.h"
#include "zstream.h"
#include "blob.h"
#include "delta.h"
#include "git2/sys/diff.h"
typedef struct {
git_diff *diff;
git_diff_format_t format;
git_diff_line_cb print_cb;
void *payload;
git_buf *buf;
uint32_t flags;
int oid_strlen;
git_diff_line line;
unsigned int
content_loaded : 1,
content_allocated : 1;
git_diff_file_content *ofile;
git_diff_file_content *nfile;
} diff_print_info;
static int diff_print_info_init__common(
diff_print_info *pi,
git_buf *out,
git_repository *repo,
git_diff_format_t format,
git_diff_line_cb cb,
void *payload)
{
pi->format = format;
pi->print_cb = cb;
pi->payload = payload;
pi->buf = out;
if (!pi->oid_strlen) {
if (!repo)
pi->oid_strlen = GIT_ABBREV_DEFAULT;
else if (git_repository__cvar(&pi->oid_strlen, repo, GIT_CVAR_ABBREV) < 0)
return -1;
}
pi->oid_strlen += 1; /* for NUL byte */
if (pi->oid_strlen > GIT_OID_HEXSZ + 1)
pi->oid_strlen = GIT_OID_HEXSZ + 1;
memset(&pi->line, 0, sizeof(pi->line));
pi->line.old_lineno = -1;
pi->line.new_lineno = -1;
pi->line.num_lines = 1;
return 0;
}
static int diff_print_info_init_fromdiff(
diff_print_info *pi,
git_buf *out,
git_diff *diff,
git_diff_format_t format,
git_diff_line_cb cb,
void *payload)
{
git_repository *repo = diff ? diff->repo : NULL;
memset(pi, 0, sizeof(diff_print_info));
pi->diff = diff;
if (diff) {
pi->flags = diff->opts.flags;
pi->oid_strlen = diff->opts.id_abbrev;
}
return diff_print_info_init__common(pi, out, repo, format, cb, payload);
}
static int diff_print_info_init_frompatch(
diff_print_info *pi,
git_buf *out,
git_patch *patch,
git_diff_format_t format,
git_diff_line_cb cb,
void *payload)
{
git_repository *repo = patch && patch->diff ? patch->diff->repo : NULL;
memset(pi, 0, sizeof(diff_print_info));
pi->diff = patch->diff;
pi->flags = patch->diff_opts.flags;
pi->oid_strlen = patch->diff_opts.id_abbrev;
pi->content_loaded = 1;
pi->ofile = &patch->ofile;
pi->nfile = &patch->nfile;
return diff_print_info_init__common(pi, out, repo, format, cb, payload);
}
static char diff_pick_suffix(int mode)
{
if (S_ISDIR(mode))
return '/';
else if (GIT_PERMS_IS_EXEC(mode)) /* -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;
case GIT_DELTA_UNREADABLE: code = 'X'; break;
default: code = ' '; break;
}
return code;
}
static int diff_print_one_name_only(
const git_diff_delta *delta, float progress, void *data)
{
diff_print_info *pi = data;
git_buf *out = pi->buf;
GIT_UNUSED(progress);
if ((pi->flags & GIT_DIFF_SHOW_UNMODIFIED) == 0 &&
delta->status == GIT_DELTA_UNMODIFIED)
return 0;
git_buf_clear(out);
git_buf_puts(out, delta->new_file.path);
git_buf_putc(out, '\n');
if (git_buf_oom(out))
return -1;
pi->line.origin = GIT_DIFF_LINE_FILE_HDR;
pi->line.content = git_buf_cstr(out);
pi->line.content_len = git_buf_len(out);
return pi->print_cb(delta, NULL, &pi->line, pi->payload);
}
static int diff_print_one_name_status(
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 ((pi->flags & GIT_DIFF_SHOW_UNMODIFIED) == 0 && 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 %s%c\n", code,
delta->old_file.path, old_suffix, delta->new_file.path, new_suffix);
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;
pi->line.origin = GIT_DIFF_LINE_FILE_HDR;
pi->line.content = git_buf_cstr(out);
pi->line.content_len = git_buf_len(out);
return pi->print_cb(delta, NULL, &pi->line, pi->payload);
}
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 ((pi->flags & GIT_DIFF_SHOW_UNMODIFIED) == 0 && code == ' ')
return 0;
git_buf_clear(out);
git_oid_tostr(start_oid, pi->oid_strlen, &delta->old_file.id);
git_oid_tostr(end_oid, pi->oid_strlen, &delta->new_file.id);
git_buf_printf(
out, (pi->oid_strlen <= GIT_OID_HEXSZ) ?
":%06o %06o %s... %s... %c" : ":%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;
pi->line.origin = GIT_DIFF_LINE_FILE_HDR;
pi->line.content = git_buf_cstr(out);
pi->line.content_len = git_buf_len(out);
return pi->print_cb(delta, NULL, &pi->line, pi->payload);
}
static int diff_print_oid_range(
git_buf *out, const git_diff_delta *delta, int oid_strlen)
{
char start_oid[GIT_OID_HEXSZ+1], end_oid[GIT_OID_HEXSZ+1];
git_oid_tostr(start_oid, oid_strlen, &delta->old_file.id);
git_oid_tostr(end_oid, oid_strlen, &delta->new_file.id);
/* 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);
}
return git_buf_oom(out) ? -1 : 0;
}
static int diff_delta_format_with_paths(
git_buf *out,
const git_diff_delta *delta,
const char *oldpfx,
const char *newpfx,
const char *template)
{
const char *oldpath = delta->old_file.path;
const char *newpath = delta->new_file.path;
if (git_oid_iszero(&delta->old_file.id)) {
oldpfx = "";
oldpath = "/dev/null";
}
if (git_oid_iszero(&delta->new_file.id)) {
newpfx = "";
newpath = "/dev/null";
}
return git_buf_printf(out, template, oldpfx, oldpath, newpfx, newpath);
}
int git_diff_delta__format_file_header(
git_buf *out,
const git_diff_delta *delta,
const char *oldpfx,
const char *newpfx,
int oid_strlen)
{
if (!oldpfx)
oldpfx = DIFF_OLD_PREFIX_DEFAULT;
if (!newpfx)
newpfx = DIFF_NEW_PREFIX_DEFAULT;
if (!oid_strlen)
oid_strlen = GIT_ABBREV_DEFAULT + 1;
git_buf_clear(out);
git_buf_printf(out, "diff --git %s%s %s%s\n",
oldpfx, delta->old_file.path, newpfx, delta->new_file.path);
GITERR_CHECK_ERROR(diff_print_oid_range(out, delta, oid_strlen));
if ((delta->flags & GIT_DIFF_FLAG_BINARY) == 0)
diff_delta_format_with_paths(
out, delta, oldpfx, newpfx, "--- %s%s\n+++ %s%s\n");
return git_buf_oom(out) ? -1 : 0;
}
static int format_binary(
diff_print_info *pi,
git_diff_binary_t type,
const char *data,
size_t datalen,
size_t inflatedlen)
{
const char *typename = type == GIT_DIFF_BINARY_DELTA ?
"delta" : "literal";
const char *scan, *end;
git_buf_printf(pi->buf, "%s %" PRIuZ "\n", typename, inflatedlen);
pi->line.num_lines++;
for (scan = data, end = data + datalen; scan < end; ) {
size_t chunk_len = end - scan;
if (chunk_len > 52)
chunk_len = 52;
if (chunk_len <= 26)
git_buf_putc(pi->buf, (char)chunk_len + 'A' - 1);
else
git_buf_putc(pi->buf, (char)chunk_len - 26 + 'a' - 1);
git_buf_encode_base85(pi->buf, scan, chunk_len);
git_buf_putc(pi->buf, '\n');
if (git_buf_oom(pi->buf))
return -1;
scan += chunk_len;
pi->line.num_lines++;
}
git_buf_putc(pi->buf, '\n');
return 0;
}
static int diff_print_load_content(
diff_print_info *pi,
git_diff_delta *delta)
{
git_diff_file_content *ofile, *nfile;
int error;
assert(pi->diff);
ofile = git__calloc(1, sizeof(git_diff_file_content));
nfile = git__calloc(1, sizeof(git_diff_file_content));
GITERR_CHECK_ALLOC(ofile);
GITERR_CHECK_ALLOC(nfile);
if ((error = git_diff_file_content__init_from_diff(
ofile, pi->diff, delta, true)) < 0 ||
(error = git_diff_file_content__init_from_diff(
nfile, pi->diff, delta, true)) < 0) {
git__free(ofile);
git__free(nfile);
return error;
}
pi->content_loaded = 1;
pi->content_allocated = 1;
pi->ofile = ofile;
pi->nfile = nfile;
return 0;
}
static int diff_print_patch_file_binary(
diff_print_info *pi, git_diff_delta *delta,
const char *old_pfx, const char *new_pfx,
const git_diff_binary *binary)
{
size_t pre_binary_size;
int error;
if ((pi->flags & GIT_DIFF_SHOW_BINARY) == 0)
goto noshow;
if (!pi->content_loaded &&
(error = diff_print_load_content(pi, delta)) < 0)
return error;
pre_binary_size = pi->buf->size;
git_buf_printf(pi->buf, "GIT binary patch\n");
pi->line.num_lines++;
if ((error = format_binary(pi, binary->new_file.type, binary->new_file.data,
binary->new_file.datalen, binary->new_file.inflatedlen)) < 0 ||
(error = format_binary(pi, binary->old_file.type, binary->old_file.data,
binary->old_file.datalen, binary->old_file.inflatedlen)) < 0) {
if (error == GIT_EBUFS) {
giterr_clear();
git_buf_truncate(pi->buf, pre_binary_size);
goto noshow;
}
}
pi->line.num_lines++;
return error;
noshow:
pi->line.num_lines = 1;
return diff_delta_format_with_paths(
pi->buf, delta, old_pfx, new_pfx,
"Binary files %s%s and %s%s differ\n");
}
static int diff_print_patch_file(
const git_diff_delta *delta, float progress, void *data)
{
int error;
diff_print_info *pi = data;
const char *oldpfx =
pi->diff ? pi->diff->opts.old_prefix : DIFF_OLD_PREFIX_DEFAULT;
const char *newpfx =
pi->diff ? pi->diff->opts.new_prefix : DIFF_NEW_PREFIX_DEFAULT;
bool binary = (delta->flags & GIT_DIFF_FLAG_BINARY) ||
(pi->flags & GIT_DIFF_FORCE_BINARY);
bool show_binary = !!(pi->flags & GIT_DIFF_SHOW_BINARY);
int oid_strlen = binary && show_binary ?
GIT_OID_HEXSZ + 1 : pi->oid_strlen;
GIT_UNUSED(progress);
if (S_ISDIR(delta->new_file.mode) ||
delta->status == GIT_DELTA_UNMODIFIED ||
delta->status == GIT_DELTA_IGNORED ||
delta->status == GIT_DELTA_UNREADABLE ||
(delta->status == GIT_DELTA_UNTRACKED &&
(pi->flags & GIT_DIFF_SHOW_UNTRACKED_CONTENT) == 0))
return 0;
if ((error = git_diff_delta__format_file_header(
pi->buf, delta, oldpfx, newpfx, oid_strlen)) < 0)
return error;
pi->line.origin = GIT_DIFF_LINE_FILE_HDR;
pi->line.content = git_buf_cstr(pi->buf);
pi->line.content_len = git_buf_len(pi->buf);
return pi->print_cb(delta, NULL, &pi->line, pi->payload);
}
static int diff_print_patch_binary(
const git_diff_delta *delta,
const git_diff_binary *binary,
void *data)
{
diff_print_info *pi = data;
const char *old_pfx =
pi->diff ? pi->diff->opts.old_prefix : DIFF_OLD_PREFIX_DEFAULT;
const char *new_pfx =
pi->diff ? pi->diff->opts.new_prefix : DIFF_NEW_PREFIX_DEFAULT;
int error;
git_buf_clear(pi->buf);
if ((error = diff_print_patch_file_binary(
pi, (git_diff_delta *)delta, old_pfx, new_pfx, binary)) < 0)
return error;
pi->line.origin = GIT_DIFF_LINE_BINARY;
pi->line.content = git_buf_cstr(pi->buf);
pi->line.content_len = git_buf_len(pi->buf);
return pi->print_cb(delta, NULL, &pi->line, pi->payload);
}
static int diff_print_patch_hunk(
const git_diff_delta *d,
const git_diff_hunk *h,
void *data)
{
diff_print_info *pi = data;
if (S_ISDIR(d->new_file.mode))
return 0;
pi->line.origin = GIT_DIFF_LINE_HUNK_HDR;
pi->line.content = h->header;
pi->line.content_len = h->header_len;
return pi->print_cb(d, h, &pi->line, pi->payload);
}
static int diff_print_patch_line(
const git_diff_delta *delta,
const git_diff_hunk *hunk,
const git_diff_line *line,
void *data)
{
diff_print_info *pi = data;
if (S_ISDIR(delta->new_file.mode))
return 0;
return pi->print_cb(delta, hunk, line, pi->payload);
}
/* print a git_diff to an output callback */
int git_diff_print(
git_diff *diff,
git_diff_format_t format,
git_diff_line_cb print_cb,
void *payload)
{
int error;
git_buf buf = GIT_BUF_INIT;
diff_print_info pi;
git_diff_file_cb print_file = NULL;
git_diff_binary_cb print_binary = NULL;
git_diff_hunk_cb print_hunk = NULL;
git_diff_line_cb print_line = NULL;
switch (format) {
case GIT_DIFF_FORMAT_PATCH:
print_file = diff_print_patch_file;
print_binary = diff_print_patch_binary;
print_hunk = diff_print_patch_hunk;
print_line = diff_print_patch_line;
break;
case GIT_DIFF_FORMAT_PATCH_HEADER:
print_file = diff_print_patch_file;
break;
case GIT_DIFF_FORMAT_RAW:
print_file = diff_print_one_raw;
break;
case GIT_DIFF_FORMAT_NAME_ONLY:
print_file = diff_print_one_name_only;
break;
case GIT_DIFF_FORMAT_NAME_STATUS:
print_file = diff_print_one_name_status;
break;
default:
giterr_set(GITERR_INVALID, "Unknown diff output format (%d)", format);
return -1;
}
if (!(error = diff_print_info_init_fromdiff(
&pi, &buf, diff, format, print_cb, payload))) {
error = git_diff_foreach(
diff, print_file, print_binary, print_hunk, print_line, &pi);
if (error) /* make sure error message is set */
giterr_set_after_callback_function(error, "git_diff_print");
}
git__free(pi.nfile);
git__free(pi.ofile);
git_buf_free(&buf);
return error;
}
/* print a git_patch to an output callback */
int git_patch_print(
git_patch *patch,
git_diff_line_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_frompatch(
&pi, &temp, patch,
GIT_DIFF_FORMAT_PATCH, print_cb, payload)))
{
error = git_patch__invoke_callbacks(
patch, diff_print_patch_file, diff_print_patch_binary,
diff_print_patch_hunk, diff_print_patch_line, &pi);
if (error) /* make sure error message is set */
giterr_set_after_callback_function(error, "git_patch_print");
}
git_buf_free(&temp);
return error;
}
int git_diff_print_callback__to_buf(
const git_diff_delta *delta,
const git_diff_hunk *hunk,
const git_diff_line *line,
void *payload)
{
git_buf *output = payload;
GIT_UNUSED(delta); GIT_UNUSED(hunk);
if (!output) {
giterr_set(GITERR_INVALID, "Buffer pointer must be provided");
return -1;
}
if (line->origin == GIT_DIFF_LINE_ADDITION ||
line->origin == GIT_DIFF_LINE_DELETION ||
line->origin == GIT_DIFF_LINE_CONTEXT)
git_buf_putc(output, line->origin);
return git_buf_put(output, line->content, line->content_len);
}
int git_diff_print_callback__to_file_handle(
const git_diff_delta *delta,
const git_diff_hunk *hunk,
const git_diff_line *line,
void *payload)
{
FILE *fp = payload ? payload : stdout;
GIT_UNUSED(delta); GIT_UNUSED(hunk);
if (line->origin == GIT_DIFF_LINE_CONTEXT ||
line->origin == GIT_DIFF_LINE_ADDITION ||
line->origin == GIT_DIFF_LINE_DELETION)
fputc(line->origin, fp);
fwrite(line->content, 1, line->content_len, fp);
return 0;
}
/* print a git_patch to a git_buf */
int git_patch_to_buf(git_buf *out, git_patch *patch)
{
assert(out && patch);
git_buf_sanitize(out);
return git_patch_print(patch, git_diff_print_callback__to_buf, out);
}
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