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#include "clar_libgit2.h"
#include "posix.h"
#include "blob.h"
#include "filter.h"
#include "git2/sys/filter.h"
#include "git2/sys/repository.h"
static git_repository *g_repo = NULL;
static git_filter *create_compress_filter(void);
static git_filter *compress_filter;
void test_filter_stream__initialize(void)
{
compress_filter = create_compress_filter();
cl_git_pass(git_filter_register("compress", compress_filter, 50));
g_repo = cl_git_sandbox_init("empty_standard_repo");
}
void test_filter_stream__cleanup(void)
{
cl_git_sandbox_cleanup();
g_repo = NULL;
git_filter_unregister("compress");
git__free(compress_filter);
}
#define CHUNKSIZE 10240
struct compress_stream {
git_writestream parent;
git_writestream *next;
git_filter_mode_t mode;
char current;
size_t current_chunk;
};
static int compress_stream_write__deflated(struct compress_stream *stream, const char *buffer, size_t len)
{
size_t idx = 0;
while (len > 0) {
size_t chunkremain, chunksize;
if (stream->current_chunk == 0)
stream->current = buffer[idx];
chunkremain = CHUNKSIZE - stream->current_chunk;
chunksize = min(chunkremain, len);
stream->current_chunk += chunksize;
len -= chunksize;
idx += chunksize;
if (stream->current_chunk == CHUNKSIZE) {
cl_git_pass(stream->next->write(stream->next, &stream->current, 1));
stream->current_chunk = 0;
}
}
return 0;
}
static int compress_stream_write__inflated(struct compress_stream *stream, const char *buffer, size_t len)
{
char inflated[CHUNKSIZE];
size_t i, j;
for (i = 0; i < len; i++) {
for (j = 0; j < CHUNKSIZE; j++)
inflated[j] = buffer[i];
cl_git_pass(stream->next->write(stream->next, inflated, CHUNKSIZE));
}
return 0;
}
static int compress_stream_write(git_writestream *s, const char *buffer, size_t len)
{
struct compress_stream *stream = (struct compress_stream *)s;
return (stream->mode == GIT_FILTER_TO_ODB) ?
compress_stream_write__deflated(stream, buffer, len) :
compress_stream_write__inflated(stream, buffer, len);
}
static int compress_stream_close(git_writestream *s)
{
struct compress_stream *stream = (struct compress_stream *)s;
cl_assert_equal_i(0, stream->current_chunk);
stream->next->close(stream->next);
return 0;
}
static void compress_stream_free(git_writestream *stream)
{
git__free(stream);
}
static int compress_filter_stream_init(
git_writestream **out,
git_filter *self,
void **payload,
const git_filter_source *src,
git_writestream *next)
{
struct compress_stream *stream = git__calloc(1, sizeof(struct compress_stream));
cl_assert(stream);
GIT_UNUSED(self);
GIT_UNUSED(payload);
stream->parent.write = compress_stream_write;
stream->parent.close = compress_stream_close;
stream->parent.free = compress_stream_free;
stream->next = next;
stream->mode = git_filter_source_mode(src);
*out = (git_writestream *)stream;
return 0;
}
git_filter *create_compress_filter(void)
{
git_filter *filter = git__calloc(1, sizeof(git_filter));
cl_assert(filter);
filter->version = GIT_FILTER_VERSION;
filter->attributes = "+compress";
filter->stream = compress_filter_stream_init;
return filter;
}
static void writefile(const char *filename, size_t numchunks)
{
git_str path = GIT_STR_INIT;
char buf[CHUNKSIZE];
size_t i = 0, j = 0;
int fd;
cl_git_pass(git_str_joinpath(&path, "empty_standard_repo", filename));
fd = p_open(path.ptr, O_RDWR|O_CREAT, 0666);
cl_assert(fd >= 0);
for (i = 0; i < numchunks; i++) {
for (j = 0; j < CHUNKSIZE; j++) {
buf[j] = i % 256;
}
cl_git_pass(p_write(fd, buf, CHUNKSIZE));
}
p_close(fd);
git_str_dispose(&path);
}
static void test_stream(size_t numchunks)
{
git_index *index;
const git_index_entry *entry;
git_blob *blob;
struct stat st;
git_checkout_options checkout_opts = GIT_CHECKOUT_OPTIONS_INIT;
checkout_opts.checkout_strategy = GIT_CHECKOUT_FORCE;
cl_git_mkfile(
"empty_standard_repo/.gitattributes",
"* compress\n");
/* write a file to disk */
writefile("streamed_file", numchunks);
/* place it in the index */
cl_git_pass(git_repository_index(&index, g_repo));
cl_git_pass(git_index_add_bypath(index, "streamed_file"));
cl_git_pass(git_index_write(index));
/* ensure it was appropriately compressed */
cl_assert(entry = git_index_get_bypath(index, "streamed_file", 0));
cl_git_pass(git_blob_lookup(&blob, g_repo, &entry->id));
cl_assert_equal_i(numchunks, git_blob_rawsize(blob));
/* check the file back out */
cl_must_pass(p_unlink("empty_standard_repo/streamed_file"));
cl_git_pass(git_checkout_index(g_repo, index, &checkout_opts));
/* ensure it was decompressed */
cl_must_pass(p_stat("empty_standard_repo/streamed_file", &st));
cl_assert_equal_sz((numchunks * CHUNKSIZE), st.st_size);
git_index_free(index);
git_blob_free(blob);
}
/* write a 50KB file through the "compression" stream */
void test_filter_stream__smallfile(void)
{
test_stream(5);
}
/* optionally write a 500 MB file through the compression stream */
void test_filter_stream__bigfile(void)
{
if (!cl_is_env_set("GITTEST_INVASIVE_FS_SIZE"))
cl_skip();
test_stream(51200);
}
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