86785fd9d1 was broken because it was
storing the full path in the MountedSourceAccessor as the `path` field
in the fetcher cache key (i.e. including the
/nix/store/... prefix). Especially in the case of lazy (virtual) store
paths, this didn't work at all because those paths are different every time.
This was broken because MountedSourceAccessor did not return a
fingerprint. Previously fingerprints were global to an accessor, but
with a MountedSourceAccessor the fingerprint can be different for each
mount point.
(Actually, this adds a position field to *all* values.)
This allows improving the "inefficient double copy" warning by showing
where the source path came from in the source, e.g.
warning: Performing inefficient double copy of path '/home/eelco/Dev/patchelf/' to the store at /home/eelco/Dev/patchelf/flake.nix:30:17. This can typically be avoided by rewriting an attribute like `src = ./.` to `src = builtins.path { path = ./.; name = "source"; }`.
Splicing the list element to the back can be done in
a much simpler and concise way without the need for
erasing and re-inserting the element. Doing it this
way is equivalent to just moving node pointers around,
whereas inserting/erasing allocates/deallocates new nodes.
I can't find a good way to benchmark in isolation from the
git cache, but common sense dictates that creating (and destroying)
a 131KiB std::vector for each regular file from the archive imposes
quite a significant overhead regardless of the IO bound git cache.
AFAICT there is no reason to keep a copy of the data since
it always gets fed into the sink and there are no coroutines/threads
in sight.
Remove outdated and no longer relevant TODO. It's more confusing
now, since symbol table must now be addressed by uint32_t indices
in order to keep Attr size down to 16 bytes on 64 bit machines.
This patch finally applies the transition to std::less<>,
which is a transparent comparator. There's no functional
change and string lookups in sets are now more efficient
and don't produce temporaries (e.g. set.find(std::string_view{"key"})).
The intention is to switch to transparent comparators from N3657 for
ordered set containers for strings and using the alias consistently
would simplify things.
Since we dropped fs::symlink_exists, we no longer have a need for the fs
namespace. Having less abstractions makes it easier to lookup the
functions in reference documentations.
As it turns out the orignal implementation of symlink_exists cannot be
used in Nix because it did now std::filesystem::filesystem_error.
The new implementation fixes that but is now actually the same as
pathExists except for the path type.
Before the change `nix` was stripping warning flags
reported by `gcc-14` too eagerly:
$ nix build -f. texinfo4
error: builder for '/nix/store/i9948l91s3df44ip5jlpp6imbrcs646x-texinfo-4.13a.drv' failed with exit code 2;
last 25 log lines:
> 1495 | info_tag (mbi_iterator_t iter, int handle, size_t *plen)
> | ~~~~~~~~^~~~
> window.c:1887:39: error: passing argument 4 of 'printed_representation' from incompatible pointer type []
> 1887 | &replen);
> | ^~~~~~~
> | |
> | int *
After the change the compiler flag remains:
$ ~/patched.nix build -f. texinfo4
error: builder for '/nix/store/i9948l91s3df44ip5jlpp6imbrcs646x-texinfo-4.13a.drv' failed with exit code 2;
last 25 log lines:
> 1495 | info_tag (mbi_iterator_t iter, int handle, size_t *plen)
> | ~~~~~~~~^~~~
> window.c:1887:39: error: passing argument 4 of 'printed_representation' from incompatible pointer type [-Wincompatible-pointer-types]
> 1887 | &replen);
> | ^~~~~~~
> | |
> | int *
Note the difference in flag rendering around the warning.
https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda has a
good sumamry of why it happens. Befomre the change `nix` was handling
just one form or URL separator:
$ printf '\e]8;;http://example.com\e\\This is a link\e]8;;\e\\\n'
Now it also handled another for (used by gcc-14`):
printf '\e]8;;http://example.com\aThis is a link\e]8;;\a\n'
While at it fixed accumulation of trailing escape `\e\\` symbol.
Once again found by an automated migration to `std::format`.
I've tested that boost::format works fine with `std::string_view`
arguments.
(cherry picked from commit 9fff868e39)
It seems that the intention was to format a number in base 8 (as
suggested by the %o format specifier), but `perms` is a `std::string`
and not a number. Looks like `rawMode` is the correct thing to use here.
(cherry picked from commit 1b5c8aac12)
It seems that the intention was to format a number in base 8 (as
suggested by the %o format specifier), but `perms` is a `std::string`
and not a number. Looks like `rawMode` is the correct thing to use here.
