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rust-cpython: mark all PyLeaked methods as unsafe...
rust-cpython: mark all PyLeaked methods as unsafe Unfortunately, these methods can be abused to obtain the inner 'static reference. The simplest (pseudo-code) example is: let leaked: PyLeaked<&'static _> = shared.leak_immutable(); let static_ref: &'static _ = &*leaked.try_borrow(py)?; // PyLeakedRef::deref() tries to bound the lifetime to itself, but // the underlying data is a &'static reference, so the returned // reference can be &'static. This problem can be easily fixed by coercing the lifetime, but there are many other ways to achieve that, and there wouldn't be a generic solution: let leaked: PyLeaked<&'static [_]> = shared.leak_immutable(); let leaked_iter: PyLeaked<slice::Iter<'static, _>> = unsafe { leaked.map(|v| v.iter()) }; let static_slice: &'static [_] = leaked_iter.try_borrow(py)?.as_slice(); So basically I failed to design the safe borrowing interface. Maybe we'll instead have to add much more restricted interface on top of the unsafe PyLeaked methods? For instance, Iterator::next() could be implemented if its Item type is not &'a (where 'a may be cheated.) Anyway, this seems not an easy issue, so it's probably better to leave the current interface as unsafe, and get broader comments while upstreaming this feature.
Gregory Szorc - - Load All Authors

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Matt Mackall
hgweb: synchronize fcgi and wsgi scripts
 r11002 #!/usr/bin/env python
#
# An example FastCGI script for use with flup, edit as necessary
# Path to repo or hgweb config to serve (see 'hg help hgweb')
config = "/path/to/repo/or/config"
Matt Mackall
hgweb: add hint about finding library path with debuginstall
 r15475 # Uncomment and adjust if Mercurial is not installed system-wide
# (consult "installed modules" path from 'hg debuginstall'):
Gregory Szorc
black: blacken scripts...
 r44058 # import sys; sys.path.insert(0, "/path/to/python/lib")
Matt Mackall
hgweb: synchronize fcgi and wsgi scripts
 r11002
# Uncomment to send python tracebacks to the browser if an error occurs:
Gregory Szorc
black: blacken scripts...
 r44058 # import cgitb; cgitb.enable()
Matt Mackall
hgweb: synchronize fcgi and wsgi scripts
 r11002
Gregory Szorc
black: blacken scripts...
 r44058 from mercurial import demandimport
demandimport.enable()
Matt Mackall
hgweb: synchronize fcgi and wsgi scripts
 r11002 from mercurial.hgweb import hgweb
from flup.server.fcgi import WSGIServer
Gregory Szorc
black: blacken scripts...
 r44058
Matt Mackall
hgweb: synchronize fcgi and wsgi scripts
 r11002 application = hgweb(config)
WSGIServer(application).run()