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John Ericson d2162e7acd Make more string values work as installables
As discussed in #7417, it would be good to make more string values work
as installables. That is to say, if an installable refers to a value,
and the value is a string, it used to not work at all, since #7484, it
works somewhat, and this PR make it work some more.

The new cases that are added for `BuiltPath` contexts:

- Fixed input- or content-addressed derivation:

  ```
  nix-repl> hello.out.outPath
  "/nix/store/jppfl2bp1zhx8sgs2mgifmsx6dv16mv2-hello-2.12"

  nix-repl> :p builtins.getContext hello.out.outPath
  { "/nix/store/c7jrxqjhdda93lhbkanqfs07x2bzazbm-hello-2.12.drv" = { outputs = [ "out" ]; }; }

  The string matches the specified single output of that derivation, so
  it should also be valid.

- Floating content-addressed derivation:

  ```
  nix-repl> (hello.overrideAttrs (_: { __contentAddressed = true; })).out.outPath
  "/1a08j26xqc0zm8agps8anxpjji410yvsx4pcgyn4bfan1ddkx2g0"

  nix-repl> :p builtins.getContext (hello.overrideAttrs (_: { __contentAddressed = true; })).out.outPath
  { "/nix/store/qc645pyf9wl37c6qvqzaqkwsm1gp48al-hello-2.12.drv" = { outputs = [ "out" ]; }; }
  ```

  The string is not a path but a placeholder, however it also matches
  the context, and because it is a CA derivation we have no better
  option. This should also be valid.

We may also want to think about richer attrset based values (also
discussed in that issue and #6507), but this change "completes" our
string-based building blocks, from which the others can be desugared
into or at least described/document/taught in terms of.

Progress towards #7417

Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
2023-05-15 09:03:38 -04:00
.github Merge pull request #8153 from obsidiansystems/more-labeler 2023-04-11 12:10:34 +02:00
config Run autoupdate 2021-06-01 11:42:38 +02:00
contrib function-trace: always show the trace 2019-09-18 23:23:21 +02:00
doc Merge pull request #8141 from tweag/user-files-doc 2023-05-15 07:11:47 -04:00
m4 autoconf: Fix C++17 detection not working on Ubuntu 16.04. 2019-07-03 04:32:25 +02:00
maintainers use headings instead of list items 2023-05-02 11:30:27 +02:00
misc Add a setting for configuring the SSL certificates file 2023-03-17 18:32:18 +01:00
mk Enable -Werror=switch-enum 2023-04-03 18:45:20 +02:00
perl Merge pull request #3746 from obsidiansystems/path-info 2023-04-17 15:49:48 +02:00
scripts Merge pull request #6953 from EzraSingh/patch-1 2023-05-05 13:20:22 +02:00
src Make more string values work as installables 2023-05-15 09:03:38 -04:00
tests Make more string values work as installables 2023-05-15 09:03:38 -04:00
.dir-locals.el .dir-locals.el: Set c-block-comment-prefix 2020-07-10 11:21:06 +02:00
.editorconfig Add .editorconfig 2017-06-05 22:57:28 +01:00
.gitignore Merge pull request #8141 from tweag/user-files-doc 2023-05-15 07:11:47 -04:00
.version Bump version 2023-04-11 20:16:37 +02:00
boehmgc-coroutine-sp-fallback.diff Always disable GC in a coroutine unless the patch is applied 2023-04-07 14:54:38 +02:00
bootstrap.sh bootstrap: Simplify & make more robust. 2011-09-06 12:11:05 +00:00
configure.ac Merge pull request #7732 from hercules-ci/make-initLibStore-viable-alternative 2023-04-17 08:04:41 -04:00
CONTRIBUTING.md Update CONTRIBUTING.md 2023-05-06 14:24:49 +02:00
COPYING * Change this to LGPL to keep the government happy. 2006-04-25 16:41:06 +00:00
default.nix add flake-compat to flake.nix and use sha256 in default.nix 2023-03-06 21:11:24 +01:00
docker.nix docker.nix: add an option to include flake-registry inside docker image (#6750) 2023-03-22 20:55:02 +01:00
flake.lock add flake-compat to flake.nix and use sha256 in default.nix 2023-03-06 21:11:24 +01:00
flake.nix fix failing configure in nix-tests 2023-04-09 02:33:53 +02:00
local.mk Enable -Werror=switch-enum 2023-04-03 18:45:20 +02:00
Makefile Generate API docs with Doxygen 2023-03-10 12:51:06 -05:00
Makefile.config.in Generate API docs with Doxygen 2023-03-10 12:51:06 -05:00
precompiled-headers.h Config: Use nlohmann/json 2020-08-20 11:02:16 +02:00
README.md Improve hacking.md 2023-02-13 12:00:00 +04:00
shell.nix Remove url literals 2022-01-24 13:28:21 +01:00

Nix

Open Collective supporters Test

Nix is a powerful package manager for Linux and other Unix systems that makes package management reliable and reproducible. Please refer to the Nix manual for more details.

Installation

On Linux and macOS the easiest way to install Nix is to run the following shell command (as a user other than root):

$ curl -L https://nixos.org/nix/install | sh

Information on additional installation methods is available on the Nix download page.

Building And Developing

See our Hacking guide in our manual for instruction on how to to set up a development environment and build Nix from source.

Additional Resources

License

Nix is released under the LGPL v2.1.