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/*
* "diff --no-index" support
* Copyright (c) 2007 by Johannes Schindelin
* Copyright (c) 2008 by Junio C Hamano
*/
#include "cache.h"
#include "color.h"
#include "commit.h"
#include "blob.h"
#include "tag.h"
#include "diff.h"
#include "diffcore.h"
#include "revision.h"
#include "log-tree.h"
#include "builtin.h"
#include "string-list.h"
static int read_directory(const char *path, struct string_list *list)
{
DIR *dir;
struct dirent *e;
if (!(dir = opendir(path)))
return error("Could not open directory %s", path);
while ((e = readdir(dir)))
if (strcmp(".", e->d_name) && strcmp("..", e->d_name))
string_list_insert(list, e->d_name);
closedir(dir);
return 0;
}
/*
* This should be "(standard input)" or something, but it will
* probably expose many more breakages in the way no-index code
* is bolted onto the diff callchain.
*/
static const char file_from_standard_input[] = "-";
static int get_mode(const char *path, int *mode)
{
struct stat st;
if (!path || !strcmp(path, "/dev/null"))
*mode = 0;
#ifdef _WIN32
else if (!strcasecmp(path, "nul"))
*mode = 0;
#endif
else if (path == file_from_standard_input)
*mode = create_ce_mode(0666);
else if (lstat(path, &st))
return error("Could not access '%s'", path);
else
*mode = st.st_mode;
return 0;
}
static int populate_from_stdin(struct diff_filespec *s)
{
struct strbuf buf = STRBUF_INIT;
size_t size = 0;
if (strbuf_read(&buf, 0, 0) < 0)
return error("error while reading from stdin %s",
strerror(errno));
s->should_munmap = 0;
s->data = strbuf_detach(&buf, &size);
s->size = size;
s->should_free = 1;
s->is_stdin = 1;
return 0;
}
static struct diff_filespec *noindex_filespec(const char *name, int mode)
{
struct diff_filespec *s;
if (!name)
name = "/dev/null";
s = alloc_filespec(name);
fill_filespec(s, null_sha1, 0, mode);
if (name == file_from_standard_input)
populate_from_stdin(s);
return s;
}
static int queue_diff(struct diff_options *o,
const char *name1, const char *name2)
{
int mode1 = 0, mode2 = 0;
if (get_mode(name1, &mode1) || get_mode(name2, &mode2))
return -1;
if (mode1 && mode2 && S_ISDIR(mode1) != S_ISDIR(mode2))
return error("file/directory conflict: %s, %s", name1, name2);
if (S_ISDIR(mode1) || S_ISDIR(mode2)) {
struct strbuf buffer1 = STRBUF_INIT;
struct strbuf buffer2 = STRBUF_INIT;
struct string_list p1 = STRING_LIST_INIT_DUP;
struct string_list p2 = STRING_LIST_INIT_DUP;
int i1, i2, ret = 0;
size_t len1 = 0, len2 = 0;
if (name1 && read_directory(name1, &p1))
return -1;
if (name2 && read_directory(name2, &p2)) {
string_list_clear(&p1, 0);
return -1;
}
if (name1) {
strbuf_addstr(&buffer1, name1);
if (buffer1.len && buffer1.buf[buffer1.len - 1] != '/')
strbuf_addch(&buffer1, '/');
len1 = buffer1.len;
}
if (name2) {
strbuf_addstr(&buffer2, name2);
if (buffer2.len && buffer2.buf[buffer2.len - 1] != '/')
strbuf_addch(&buffer2, '/');
len2 = buffer2.len;
}
for (i1 = i2 = 0; !ret && (i1 < p1.nr || i2 < p2.nr); ) {
const char *n1, *n2;
int comp;
strbuf_setlen(&buffer1, len1);
strbuf_setlen(&buffer2, len2);
if (i1 == p1.nr)
comp = 1;
else if (i2 == p2.nr)
comp = -1;
else
comp = strcmp(p1.items[i1].string, p2.items[i2].string);
if (comp > 0)
n1 = NULL;
else {
strbuf_addstr(&buffer1, p1.items[i1++].string);
n1 = buffer1.buf;
}
if (comp < 0)
n2 = NULL;
else {
strbuf_addstr(&buffer2, p2.items[i2++].string);
n2 = buffer2.buf;
}
ret = queue_diff(o, n1, n2);
}
string_list_clear(&p1, 0);
string_list_clear(&p2, 0);
strbuf_release(&buffer1);
strbuf_release(&buffer2);
return ret;
} else {
struct diff_filespec *d1, *d2;
if (DIFF_OPT_TST(o, REVERSE_DIFF)) {
unsigned tmp;
const char *tmp_c;
tmp = mode1; mode1 = mode2; mode2 = tmp;
tmp_c = name1; name1 = name2; name2 = tmp_c;
}
d1 = noindex_filespec(name1, mode1);
d2 = noindex_filespec(name2, mode2);
diff_queue(&diff_queued_diff, d1, d2);
return 0;
}
}
void diff_no_index(struct rev_info *revs,
int argc, const char **argv,
int nongit, const char *prefix)
{
int i, prefixlen;
int no_index = 0;
unsigned options = 0;
const char *paths[2];
/* Were we asked to do --no-index explicitly? */
for (i = 1; i < argc; i++) {
if (!strcmp(argv[i], "--")) {
i++;
break;
}
if (!strcmp(argv[i], "--no-index"))
no_index = 1;
if (argv[i][0] != '-')
break;
}
if (!no_index && !nongit) {
/*
* Inside a git repository, without --no-index. Only
* when a path outside the repository is given,
* e.g. "git diff /var/tmp/[12]", or "git diff
* Makefile /var/tmp/Makefile", allow it to be used as
* a colourful "diff" replacement.
*/
if ((argc != i + 2) ||
(path_inside_repo(prefix, argv[i]) &&
path_inside_repo(prefix, argv[i+1])))
return;
}
if (argc != i + 2)
usagef("git diff %s <path> <path>",
no_index ? "--no-index" : "[--no-index]");
diff_setup(&revs->diffopt);
for (i = 1; i < argc - 2; ) {
int j;
if (!strcmp(argv[i], "--no-index"))
i++;
else if (!strcmp(argv[i], "-q")) {
options |= DIFF_SILENT_ON_REMOVED;
i++;
}
else if (!strcmp(argv[i], "--"))
i++;
else {
j = diff_opt_parse(&revs->diffopt, argv + i, argc - i);
if (!j)
die("invalid diff option/value: %s", argv[i]);
i += j;
}
}
prefixlen = prefix ? strlen(prefix) : 0;
for (i = 0; i < 2; i++) {
const char *p = argv[argc - 2 + i];
if (!strcmp(p, "-"))
/*
* stdin should be spelled as "-"; if you have
* path that is "-", spell it as "./-".
*/
p = file_from_standard_input;
else if (prefixlen)
p = xstrdup(prefix_filename(prefix, prefixlen, p));
paths[i] = p;
}
revs->diffopt.skip_stat_unmatch = 1;
if (!revs->diffopt.output_format)
revs->diffopt.output_format = DIFF_FORMAT_PATCH;
DIFF_OPT_SET(&revs->diffopt, NO_INDEX);
revs->max_count = -2;
diff_setup_done(&revs->diffopt);
setup_diff_pager(&revs->diffopt);
DIFF_OPT_SET(&revs->diffopt, EXIT_WITH_STATUS);
if (queue_diff(&revs->diffopt, paths[0], paths[1]))
exit(1);
diff_set_mnemonic_prefix(&revs->diffopt, "1/", "2/");
diffcore_std(&revs->diffopt);
diff_flush(&revs->diffopt);
/*
* The return code for --no-index imitates diff(1):
* 0 = no changes, 1 = changes, else error
*/
exit(diff_result_code(&revs->diffopt, 0));
}
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