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git-commit-vandalism/t/helper/test-path-utils.c
Elijah Newren 74ea5c9574 treewide: be explicit about dependence on trace.h & trace2.h 
Dozens of files made use of trace and trace2 functions, without
explicitly including trace.h or trace2.h.  This made it more difficult
to find which files could remove a dependence on cache.h.  Make C files
explicitly include trace.h or trace2.h if they are using them.

Signed-off-by: Elijah Newren <newren@gmail.com>
Acked-by: Calvin Wan <calvinwan@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-04-11 08:52:08 -07:00

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#include "test-tool.h"
#include "cache.h"
#include "abspath.h"
#include "environment.h"
#include "setup.h"
#include "string-list.h"
#include "trace.h"
#include "utf8.h"
/*
* A "string_list_each_func_t" function that normalizes an entry from
* GIT_CEILING_DIRECTORIES. If the path is unusable for some reason,
* die with an explanation.
*/
static int normalize_ceiling_entry(struct string_list_item *item,
void *data UNUSED)
{
char *ceil = item->string;
if (!*ceil)
die("Empty path is not supported");
if (!is_absolute_path(ceil))
die("Path \"%s\" is not absolute", ceil);
if (normalize_path_copy(ceil, ceil) < 0)
die("Path \"%s\" could not be normalized", ceil);
return 1;
}
static void normalize_argv_string(const char **var, const char *input)
{
if (!strcmp(input, "<null>"))
*var = NULL;
else if (!strcmp(input, "<empty>"))
*var = "";
else
*var = input;
if (*var && (**var == '<' || **var == '('))
die("Bad value: %s\n", input);
}
struct test_data {
const char *from; /* input: transform from this ... */
const char *to; /* output: ... to this. */
const char *alternative; /* output: ... or this. */
};
/*
* Compatibility wrappers for OpenBSD, whose basename(3) and dirname(3)
* have const parameters.
*/
static char *posix_basename(char *path)
{
return basename(path);
}
static char *posix_dirname(char *path)
{
return dirname(path);
}
static int test_function(struct test_data *data, char *(*func)(char *input),
const char *funcname)
{
int failed = 0, i;
char buffer[1024];
char *to;
for (i = 0; data[i].to; i++) {
if (!data[i].from)
to = func(NULL);
else {
xsnprintf(buffer, sizeof(buffer), "%s", data[i].from);
to = func(buffer);
}
if (!strcmp(to, data[i].to))
continue;
if (!data[i].alternative)
error("FAIL: %s(%s) => '%s' != '%s'\n",
funcname, data[i].from, to, data[i].to);
else if (!strcmp(to, data[i].alternative))
continue;
else
error("FAIL: %s(%s) => '%s' != '%s', '%s'\n",
funcname, data[i].from, to, data[i].to,
data[i].alternative);
failed = 1;
}
return failed;
}
static struct test_data basename_data[] = {
/* --- POSIX type paths --- */
{ NULL, "." },
{ "", "." },
{ ".", "." },
{ "..", ".." },
{ "/", "/" },
{ "//", "/", "//" },
{ "///", "/", "//" },
{ "////", "/", "//" },
{ "usr", "usr" },
{ "/usr", "usr" },
{ "/usr/", "usr" },
{ "/usr//", "usr" },
{ "/usr/lib", "lib" },
{ "usr/lib", "lib" },
{ "usr/lib///", "lib" },
#if defined(__MINGW32__) || defined(_MSC_VER)
/* --- win32 type paths --- */
{ "\\usr", "usr" },
{ "\\usr\\", "usr" },
{ "\\usr\\\\", "usr" },
{ "\\usr\\lib", "lib" },
{ "usr\\lib", "lib" },
{ "usr\\lib\\\\\\", "lib" },
{ "C:/usr", "usr" },
{ "C:/usr", "usr" },
{ "C:/usr/", "usr" },
{ "C:/usr//", "usr" },
{ "C:/usr/lib", "lib" },
{ "C:usr/lib", "lib" },
{ "C:usr/lib///", "lib" },
{ "C:", "." },
{ "C:a", "a" },
{ "C:/", "/" },
{ "C:///", "/" },
{ "\\", "\\", "/" },
{ "\\\\", "\\", "/" },
{ "\\\\\\", "\\", "/" },
#endif
{ NULL, NULL }
};
static struct test_data dirname_data[] = {
/* --- POSIX type paths --- */
{ NULL, "." },
{ "", "." },
{ ".", "." },
{ "..", "." },
{ "/", "/" },
{ "//", "/", "//" },
{ "///", "/", "//" },
{ "////", "/", "//" },
{ "usr", "." },
{ "/usr", "/" },
{ "/usr/", "/" },
{ "/usr//", "/" },
{ "/usr/lib", "/usr" },
{ "usr/lib", "usr" },
{ "usr/lib///", "usr" },
#if defined(__MINGW32__) || defined(_MSC_VER)
/* --- win32 type paths --- */
{ "\\", "\\" },
{ "\\\\", "\\\\" },
{ "\\usr", "\\" },
{ "\\usr\\", "\\" },
{ "\\usr\\\\", "\\" },
{ "\\usr\\lib", "\\usr" },
{ "usr\\lib", "usr" },
{ "usr\\lib\\\\\\", "usr" },
{ "C:a", "C:." },
{ "C:/", "C:/" },
{ "C:///", "C:/" },
{ "C:/usr", "C:/" },
{ "C:/usr/", "C:/" },
{ "C:/usr//", "C:/" },
{ "C:/usr/lib", "C:/usr" },
{ "C:usr/lib", "C:usr" },
{ "C:usr/lib///", "C:usr" },
{ "\\\\\\", "\\" },
{ "\\\\\\\\", "\\" },
{ "C:", "C:.", "." },
#endif
{ NULL, NULL }
};
static int check_dotfile(const char *x, const char **argv,
int (*is_hfs)(const char *),
int (*is_ntfs)(const char *))
{
int res = 0, expect = 1;
for (; *argv; argv++) {
if (!strcmp("--not", *argv))
expect = !expect;
else if (expect != (is_hfs(*argv) || is_ntfs(*argv)))
res = error("'%s' is %s.git%s", *argv,
expect ? "not " : "", x);
else
fprintf(stderr, "ok: '%s' is %s.git%s\n",
*argv, expect ? "" : "not ", x);
}
return !!res;
}
static int cmp_by_st_size(const void *a, const void *b)
{
intptr_t x = (intptr_t)((struct string_list_item *)a)->util;
intptr_t y = (intptr_t)((struct string_list_item *)b)->util;
return x > y ? -1 : (x < y ? +1 : 0);
}
/*
* A very simple, reproducible pseudo-random generator. Copied from
* `test-genrandom.c`.
*/
static uint64_t my_random_value = 1234;
static uint64_t my_random(void)
{
my_random_value = my_random_value * 1103515245 + 12345;
return my_random_value;
}
/*
* A fast approximation of the square root, without requiring math.h.
*
* It uses Newton's method to approximate the solution of 0 = x^2 - value.
*/
static double my_sqrt(double value)
{
const double epsilon = 1e-6;
double x = value;
if (value == 0)
return 0;
for (;;) {
double delta = (value / x - x) / 2;
if (delta < epsilon && delta > -epsilon)
return x + delta;
x += delta;
}
}
static int protect_ntfs_hfs_benchmark(int argc, const char **argv)
{
size_t i, j, nr, min_len = 3, max_len = 20;
char **names;
int repetitions = 15, file_mode = 0100644;
uint64_t begin, end;
double m[3][2], v[3][2];
uint64_t cumul;
double cumul2;
if (argc > 1 && !strcmp(argv[1], "--with-symlink-mode")) {
file_mode = 0120000;
argc--;
argv++;
}
nr = argc > 1 ? strtoul(argv[1], NULL, 0) : 1000000;
ALLOC_ARRAY(names, nr);
if (argc > 2) {
min_len = strtoul(argv[2], NULL, 0);
if (argc > 3)
max_len = strtoul(argv[3], NULL, 0);
if (min_len > max_len)
die("min_len > max_len");
}
for (i = 0; i < nr; i++) {
size_t len = min_len + (my_random() % (max_len + 1 - min_len));
names[i] = xmallocz(len);
while (len > 0)
names[i][--len] = (char)(' ' + (my_random() % ('\x7f' - ' ')));
}
for (protect_ntfs = 0; protect_ntfs < 2; protect_ntfs++)
for (protect_hfs = 0; protect_hfs < 2; protect_hfs++) {
cumul = 0;
cumul2 = 0;
for (i = 0; i < repetitions; i++) {
begin = getnanotime();
for (j = 0; j < nr; j++)
verify_path(names[j], file_mode);
end = getnanotime();
printf("protect_ntfs = %d, protect_hfs = %d: %lfms\n", protect_ntfs, protect_hfs, (end-begin) / (double)1e6);
cumul += end - begin;
cumul2 += (end - begin) * (end - begin);
}
m[protect_ntfs][protect_hfs] = cumul / (double)repetitions;
v[protect_ntfs][protect_hfs] = my_sqrt(cumul2 / (double)repetitions - m[protect_ntfs][protect_hfs] * m[protect_ntfs][protect_hfs]);
printf("mean: %lfms, stddev: %lfms\n", m[protect_ntfs][protect_hfs] / (double)1e6, v[protect_ntfs][protect_hfs] / (double)1e6);
}
for (protect_ntfs = 0; protect_ntfs < 2; protect_ntfs++)
for (protect_hfs = 0; protect_hfs < 2; protect_hfs++)
printf("ntfs=%d/hfs=%d: %lf%% slower\n", protect_ntfs, protect_hfs, (m[protect_ntfs][protect_hfs] - m[0][0]) * 100 / m[0][0]);
return 0;
}
int cmd__path_utils(int argc, const char **argv)
{
if (argc == 3 && !strcmp(argv[1], "normalize_path_copy")) {
char *buf = xmallocz(strlen(argv[2]));
int rv = normalize_path_copy(buf, argv[2]);
puts(rv ? "++failed++" : buf);
free(buf);
return 0;
}
if (argc >= 2 && !strcmp(argv[1], "real_path")) {
struct strbuf realpath = STRBUF_INIT;
while (argc > 2) {
strbuf_realpath(&realpath, argv[2], 1);
puts(realpath.buf);
argc--;
argv++;
}
strbuf_release(&realpath);
return 0;
}
if (argc >= 2 && !strcmp(argv[1], "absolute_path")) {
while (argc > 2) {
puts(absolute_path(argv[2]));
argc--;
argv++;
}
return 0;
}
if (argc == 4 && !strcmp(argv[1], "longest_ancestor_length")) {
int len;
struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
char *path = xstrdup(argv[2]);
/*
* We have to normalize the arguments because under
* Windows, bash mangles arguments that look like
* absolute POSIX paths or colon-separate lists of
* absolute POSIX paths into DOS paths (e.g.,
* "/foo:/foo/bar" might be converted to
* "D:\Src\msysgit\foo;D:\Src\msysgit\foo\bar"),
* whereas longest_ancestor_length() requires paths
* that use forward slashes.
*/
if (normalize_path_copy(path, path))
die("Path \"%s\" could not be normalized", argv[2]);
string_list_split(&ceiling_dirs, argv[3], PATH_SEP, -1);
filter_string_list(&ceiling_dirs, 0,
normalize_ceiling_entry, NULL);
len = longest_ancestor_length(path, &ceiling_dirs);
string_list_clear(&ceiling_dirs, 0);
free(path);
printf("%d\n", len);
return 0;
}
if (argc >= 4 && !strcmp(argv[1], "prefix_path")) {
const char *prefix = argv[2];
int prefix_len = strlen(prefix);
int nongit_ok;
setup_git_directory_gently(&nongit_ok);
while (argc > 3) {
char *pfx = prefix_path(prefix, prefix_len, argv[3]);
puts(pfx);
free(pfx);
argc--;
argv++;
}
return 0;
}
if (argc == 4 && !strcmp(argv[1], "strip_path_suffix")) {
char *prefix = strip_path_suffix(argv[2], argv[3]);
printf("%s\n", prefix ? prefix : "(null)");
free(prefix);
return 0;
}
if (argc == 3 && !strcmp(argv[1], "print_path")) {
puts(argv[2]);
return 0;
}
if (argc == 4 && !strcmp(argv[1], "relative_path")) {
struct strbuf sb = STRBUF_INIT;
const char *in, *prefix, *rel;
normalize_argv_string(&in, argv[2]);
normalize_argv_string(&prefix, argv[3]);
rel = relative_path(in, prefix, &sb);
if (!rel)
puts("(null)");
else
puts(strlen(rel) > 0 ? rel : "(empty)");
strbuf_release(&sb);
return 0;
}
if (argc == 2 && !strcmp(argv[1], "basename"))
return test_function(basename_data, posix_basename, argv[1]);
if (argc == 2 && !strcmp(argv[1], "dirname"))
return test_function(dirname_data, posix_dirname, argv[1]);
if (argc > 2 && !strcmp(argv[1], "is_dotgitmodules")) {
return check_dotfile("modules", argv + 2,
is_hfs_dotgitmodules,
is_ntfs_dotgitmodules);
}
if (argc > 2 && !strcmp(argv[1], "is_dotgitignore")) {
return check_dotfile("ignore", argv + 2,
is_hfs_dotgitignore,
is_ntfs_dotgitignore);
}
if (argc > 2 && !strcmp(argv[1], "is_dotgitattributes")) {
return check_dotfile("attributes", argv + 2,
is_hfs_dotgitattributes,
is_ntfs_dotgitattributes);
}
if (argc > 2 && !strcmp(argv[1], "is_dotmailmap")) {
return check_dotfile("mailmap", argv + 2,
is_hfs_dotmailmap,
is_ntfs_dotmailmap);
}
if (argc > 2 && !strcmp(argv[1], "file-size")) {
int res = 0, i;
struct stat st;
for (i = 2; i < argc; i++)
if (stat(argv[i], &st))
res = error_errno("Cannot stat '%s'", argv[i]);
else
printf("%"PRIuMAX"\n", (uintmax_t)st.st_size);
return !!res;
}
if (argc == 4 && !strcmp(argv[1], "skip-n-bytes")) {
int fd = open(argv[2], O_RDONLY), offset = atoi(argv[3]);
char buffer[65536];
if (fd < 0)
die_errno("could not open '%s'", argv[2]);
if (lseek(fd, offset, SEEK_SET) < 0)
die_errno("could not skip %d bytes", offset);
for (;;) {
ssize_t count = read(fd, buffer, sizeof(buffer));
if (count < 0)
die_errno("could not read '%s'", argv[2]);
if (!count)
break;
if (write(1, buffer, count) < 0)
die_errno("could not write to stdout");
}
close(fd);
return 0;
}
if (argc > 5 && !strcmp(argv[1], "slice-tests")) {
int res = 0;
long offset, stride, i;
struct string_list list = STRING_LIST_INIT_NODUP;
struct stat st;
offset = strtol(argv[2], NULL, 10);
stride = strtol(argv[3], NULL, 10);
if (stride < 1)
stride = 1;
for (i = 4; i < argc; i++)
if (stat(argv[i], &st))
res = error_errno("Cannot stat '%s'", argv[i]);
else
string_list_append(&list, argv[i])->util =
(void *)(intptr_t)st.st_size;
QSORT(list.items, list.nr, cmp_by_st_size);
for (i = offset; i < list.nr; i+= stride)
printf("%s\n", list.items[i].string);
return !!res;
}
if (argc > 1 && !strcmp(argv[1], "protect_ntfs_hfs"))
return !!protect_ntfs_hfs_benchmark(argc - 1, argv + 1);
if (argc > 1 && !strcmp(argv[1], "is_valid_path")) {
int res = 0, expect = 1, i;
for (i = 2; i < argc; i++)
if (!strcmp("--not", argv[i]))
expect = 0;
else if (expect != is_valid_path(argv[i]))
res = error("'%s' is%s a valid path",
argv[i], expect ? " not" : "");
else
fprintf(stderr,
"'%s' is%s a valid path\n",
argv[i], expect ? "" : " not");
return !!res;
}
fprintf(stderr, "%s: unknown function name: %s\n", argv[0],
argv[1] ? argv[1] : "(there was none)");
return 1;
}
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