This is convenient for debugging the underlying streamed image used by
`dockerTools.buildLayeredImage`.
Here's an example of how you might use this:
```console
$ nix repl ./.
nix-repl> dockerTools.examples.nginx.passthru.stream
«derivation /nix/store/9zczmlp2kraszx4ssmh6fawnlnsa5a4n-stream-nginx-container.drv»
```
The way we build python environments is subtly broken. A python
environment should be semantically identical to a vanilla Python
installation in, say, /usr/local. The current implementation, however,
differs in two important ways. The first is that it's impossible to use
python packages from the environment in python virtual environments. The
second is that the nix-generated environment appears to be a venv, but
it's not.
This commit changes the way python environments are built:
* When generating wrappers for python executables, we inherit argv[0]
from the wrapper. This causes python to initialize its configuration
in the environment with all the correct paths.
* We remove the sitecustomize.py file from the base python package.
This file was used tweak the python configuration after it was
incorrectly initialized. That's no longer necessary.
The end result is that python environments no longer appear to be venvs,
and behave more like a vanilla python installation. In addition it's
possible to create a venv using an environment and use packages from
both the environment and the venv.
We also renamed `filter` (as a name of a parameter) to `predicate` following the naming suggestion in code review. It's better!
Since it's not part of an attrset, the name can change with no impact to semantics, since it can't be observed with `builtins.functionArgs`.
```
$ nix-repl
Nix 2.21.0
Type :? for help.
nix-repl> f = x: y: z: (x + y + z)
nix-repl> builtins.functionArgs f
{ }
nix-repl> :doc builtins.functionArgs
Synopsis: builtins.functionArgs f
Return a set containing the names of the formal arguments expected by the function f. The value of each attribute is a Boolean denoting whether the corresponding argument has a default value. For instance, functionArgs ({ x, y ?
123}: ...) = { x = false; y = true; }.
"Formal argument" here refers to the attributes pattern-matched by the function. Plain lambdas are not included, e.g. functionArgs (x: ...) = { }.
```
The nixpkgs-unstable channel's programs.sqlite was used to identify
packages producing exactly one binary, and these automatically added
to their package definitions wherever possible.
Replace writeReferencesToFile with writeClosure.
Make writeClosure accept a list of paths instead of a path.
Re-implement with JSON-based exportReferencesGraph interface provided by
__structuredAttrs = true.
Reword the documentation.
Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>
Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
Co-authored-by: Someone Serge <sergei.kozlukov@aalto.fi>
In NixOS/nixpkgs#290081 it came to attention that autoPatchelfHook is
one of if not the only hook in Nixpkgs that is a multiline string
expression. Almost all hooks are functions, which guard with something
like `if [ -z "${dontDoTheThing-}" ]; then ...` in the function, or
single-line strings which include that guard inline and then call the
real function, e.g. `if [ -z "${dontDoTheThing-} ]; then doTheThing; fi`.
This commit moves autoPatchelfHook to the former, which seems to be the
most common style now.
swiftc uses cc-wrapper which sets the -march flag on some systems which
breaks the build. This change adds a flag, disableMarch, to cc-wrapper
which disables using the -march flag.
https://github.com/NixOS/nixpkgs/issues/295322
