##// END OF EJS Templates
copies: do copy tracing based on ctx.p[12]copies() if configured...
copies: do copy tracing based on ctx.p[12]copies() if configured This adds an option to do copy tracing in a changeset-optimized way. If the metadata is stored in filelogs, this is obviously going to be suboptimal. The point is that it provides a way of transitioning to changeset-stored metadata. Some of the tests behave a little differently, but they all seem resonable to me. The config option may very well be renamed later when it's clearer what options we want and how they will behave. When the test suite is run with --extra-config-opt to use the new copy tracing, all tests pass, besides test-copies.t (which fails in the same way as you can see in this patch). `hg debugpathcopies 4.0 4.8` reports 82 copies. With this option enabled, the only difference is this: -mercurial/pure/bdiff.py -> mercurial/cffi/bdiff.py +setup_bdiff_cffi.py -> mercurial/cffi/bdiff.py I believe that happened because it was renamed in different ways on different sides of a merge and the new algorithm arbitrarily prefers copies that happened on p1. The runtime is about 0.85 seconds with the old copy tracing and 5.7 seconds with the new copy tracing. That's kind of slow, but actually better than I had expected. Differential Revision: https://phab.mercurial-scm.org/D5991

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osutilbuild.py
102 lines | 2.4 KiB | text/x-python | PythonLexer
from __future__ import absolute_import
import cffi
ffi = cffi.FFI()
ffi.set_source("mercurial.cffi._osutil", """
#include <sys/attr.h>
#include <sys/vnode.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
typedef struct val_attrs {
uint32_t length;
attribute_set_t returned;
attrreference_t name_info;
fsobj_type_t obj_type;
struct timespec mtime;
uint32_t accessmask;
off_t datalength;
} __attribute__((aligned(4), packed)) val_attrs_t;
""", include_dirs=['mercurial'])
ffi.cdef('''
typedef uint32_t attrgroup_t;
typedef struct attrlist {
uint16_t bitmapcount; /* number of attr. bit sets in list */
uint16_t reserved; /* (to maintain 4-byte alignment) */
attrgroup_t commonattr; /* common attribute group */
attrgroup_t volattr; /* volume attribute group */
attrgroup_t dirattr; /* directory attribute group */
attrgroup_t fileattr; /* file attribute group */
attrgroup_t forkattr; /* fork attribute group */
...;
};
typedef struct attribute_set {
...;
} attribute_set_t;
typedef struct attrreference {
int attr_dataoffset;
int attr_length;
...;
} attrreference_t;
typedef int ... off_t;
typedef struct val_attrs {
uint32_t length;
attribute_set_t returned;
attrreference_t name_info;
uint32_t obj_type;
struct timespec mtime;
uint32_t accessmask;
off_t datalength;
...;
} val_attrs_t;
/* the exact layout of the above struct will be figured out during build time */
typedef int ... time_t;
typedef struct timespec {
time_t tv_sec;
...;
};
int getattrlist(const char* path, struct attrlist * attrList, void * attrBuf,
size_t attrBufSize, unsigned int options);
int getattrlistbulk(int dirfd, struct attrlist * attrList, void * attrBuf,
size_t attrBufSize, uint64_t options);
#define ATTR_BIT_MAP_COUNT ...
#define ATTR_CMN_NAME ...
#define ATTR_CMN_OBJTYPE ...
#define ATTR_CMN_MODTIME ...
#define ATTR_CMN_ACCESSMASK ...
#define ATTR_CMN_ERROR ...
#define ATTR_CMN_RETURNED_ATTRS ...
#define ATTR_FILE_DATALENGTH ...
#define VREG ...
#define VDIR ...
#define VLNK ...
#define VBLK ...
#define VCHR ...
#define VFIFO ...
#define VSOCK ...
#define S_IFMT ...
int open(const char *path, int oflag, int perm);
int close(int);
#define O_RDONLY ...
''')
if __name__ == '__main__':
ffi.compile()