upstream/mercurial-mirror Files · mercurial/cffi/mpatchbuild.py

revlog: move censor logic out of censor extension...

revlog: move censor logic out of censor extension The censor extension is doing very low-level things with revlogs. It is fundamentally impossible for this logic to remain in the censor extension while support multiple storage backends: we need each storage backend to implement censor in its own storage-specific way. This commit effectively moves the revlog-specific censoring code to be a method of revlogs themselves. We've defined a new API on the file storage interface for censoring an individual node. Even though the current censoring code doesn't use it, the API requires a transaction instance because it logically makes sense for storage backends to require an active transaction (which implies a held write lock) in order to rewrite storage. After this commit, the censor extension has been reduced to boilerplate precondition checking before invoking the generic storage API. I tried to keep the code as similar as possible. But some minor changes were made: * We use self._io instead of instantiating a new revlogio instance. * We compare self.version against REVLOGV0 instead of != REVLOGV1 because presumably all future revlog versions will support censoring. * We use self.opener instead of going through repo.svfs (we don't have a handle on the repo instance from a revlog). * "revlog" dropped * Replace "flog" with "self". Differential Revision: https://phab.mercurial-scm.org/D4656

Yuya Nishihara - - Load All Authors

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        Yuya Nishihara
    
cffi: rename build scripts...

              r32505
            
      from __future__ import absolute_import

      import cffi

      import os

      ffi = cffi.FFI()

      mpatch_c = os.path.join(os.path.join(os.path.dirname(__file__), '..',

                                           'mpatch.c'))

        Augie Fackler
    
cleanup: fix some latent open(path).read() et al calls we previously missed...

              r36966
            
      with open(mpatch_c) as f:

          ffi.set_source("mercurial.cffi._mpatch", f.read(),

                         include_dirs=["mercurial"])

        Yuya Nishihara
    
cffi: rename build scripts...

              r32505
            
      ffi.cdef("""

      struct mpatch_frag {

             int start, end, len;

             const char *data;

      };

      struct mpatch_flist {

             struct mpatch_frag *base, *head, *tail;

      };

      extern "Python" struct mpatch_flist* cffi_get_next_item(void*, ssize_t);

      int mpatch_decode(const char *bin, ssize_t len, struct mpatch_flist** res);

      ssize_t mpatch_calcsize(size_t len, struct mpatch_flist *l);

      void mpatch_lfree(struct mpatch_flist *a);

      static int mpatch_apply(char *buf, const char *orig, size_t len,

                              struct mpatch_flist *l);

      struct mpatch_flist *mpatch_fold(void *bins,

                             struct mpatch_flist* (*get_next_item)(void*, ssize_t),

                             ssize_t start, ssize_t end);

      """)

      if __name__ == '__main__':

          ffi.compile()

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Yuya Nishihara cffi: rename build scripts...	r32505	from __future__ import absolute_import

		import cffi
		import os

		ffi = cffi.FFI()
		mpatch_c = os.path.join(os.path.join(os.path.dirname(__file__), '..',
		'mpatch.c'))
Augie Fackler cleanup: fix some latent open(path).read() et al calls we previously missed...	r36966	with open(mpatch_c) as f:
		ffi.set_source("mercurial.cffi._mpatch", f.read(),
		include_dirs=["mercurial"])
Yuya Nishihara cffi: rename build scripts...	r32505	ffi.cdef("""

		struct mpatch_frag {
		int start, end, len;
		const char *data;
		};

		struct mpatch_flist {
		struct mpatch_frag base, head, *tail;
		};

		extern "Python" struct mpatch_flist* cffi_get_next_item(void*, ssize_t);

		int mpatch_decode(const char bin, ssize_t len, struct mpatch_flist* res);
		ssize_t mpatch_calcsize(size_t len, struct mpatch_flist *l);
		void mpatch_lfree(struct mpatch_flist *a);
		static int mpatch_apply(char buf, const char orig, size_t len,
		struct mpatch_flist *l);
		struct mpatch_flist mpatch_fold(void bins,
		struct mpatch_flist* (get_next_item)(void, ssize_t),
		ssize_t start, ssize_t end);
		""")

		if __name__ == '__main__':
		ffi.compile()