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Maximilian Bosch f742438465
Merge legacy fetchGit-builtin with the generic fetchTree-function
The original idea was to implement a git-fetcher in Nix's core that
supports content hashes[1]. In #3549[2] it has been suggested to
actually use `fetchTree` for this since it's a fairly generic wrapper
over the new fetcher-API[3] and already supports content-hashes.

This patch implements a new git-fetcher based on `fetchTree` by
incorporating the following changes:

* Removed the original `fetchGit`-implementation and replaced it with an
  alias on the `fetchTree` implementation.

* Ensured that the `git`-fetcher from `libfetchers` always computes a
  content-hash and returns an "empty" revision on dirty trees (the
  latter one is needed to retain backwards-compatibility).

* The hash-mismatch error in the fetcher-API exits with code 102 as it
  usually happens whenever a hash-mismatch is detected by Nix.

* Removed the `flakes`-feature-flag: I didn't see a reason why this API
  is so tightly coupled to the flakes-API and at least `fetchGit` should
  remain usable without any feature-flags.

* It's only possible to specify a `narHash` for a `git`-tree if either a
  `ref` or a `rev` is given[4].

* It's now possible to specify an URL without a protocol. If it's missing,
  `file://` is automatically added as it was the case in the original
  `fetchGit`-implementation.

[1] https://github.com/NixOS/nix/pull/3216
[2] https://github.com/NixOS/nix/pull/3549#issuecomment-625194383
[3] https://github.com/NixOS/nix/pull/3459
[4] https://github.com/NixOS/nix/pull/3216#issuecomment-553956703
2020-07-28 00:44:39 +02:00
.github add temp CI job to test syspolicy impact 2020-07-08 20:10:22 -05:00
config
contrib function-trace: always show the trace 2019-09-18 23:23:21 +02:00
corepkgs Move call-flake.nix into libexpr 2020-03-11 17:04:51 +01:00
doc/manual Remove unused file 2020-07-23 18:25:09 +02:00
m4 autoconf: Fix C++17 detection not working on Ubuntu 16.04. 2019-07-03 04:32:25 +02:00
maintainers upload-release.pl: Update latest-release branch 2020-07-08 17:01:20 +02:00
misc Fix completion script install name 2020-06-04 13:37:37 +02:00
mk Allow PRECOMPILE_HEADERS in cross-compilation 2020-07-25 18:02:42 -05:00
nix-rust make check: Run unit tests 2020-05-08 11:49:40 +02:00
perl Merge remote-tracking branch 'upstream/master' into hash-always-has-type 2020-07-27 16:13:57 +00:00
scripts Add newline to profile sourcing line #3393 2020-07-18 10:24:22 -05:00
src Merge legacy fetchGit-builtin with the generic fetchTree-function 2020-07-28 00:44:39 +02:00
tests Merge legacy fetchGit-builtin with the generic fetchTree-function 2020-07-28 00:44:39 +02:00
.dir-locals.el .dir-locals.el: Set c-block-comment-prefix 2020-07-10 11:21:06 +02:00
.editorconfig
.gitignore Add src/libutil/tests/libutil-tests to .gitignore 2020-06-04 21:05:41 +00:00
.version Bump version 2019-09-04 15:59:33 +02:00
bootstrap.sh
configure.ac Merge remote-tracking branch 'origin/master' into flakes 2020-05-28 12:55:24 +02:00
COPYING
default.nix Simplify shell.nix and default.nix 2020-06-17 19:21:46 +02:00
flake.lock flake.lock: Update 2020-06-09 11:24:06 +02:00
flake.nix Merge remote-tracking branch 'origin/master' into flakes 2020-06-17 10:26:52 +02:00
local.mk Remove global -I flags 2020-03-30 14:39:33 +02:00
Makefile Merge remote-tracking branch 'origin/master' into flakes 2020-06-17 10:26:52 +02:00
Makefile.config.in fix make's impurity on /bin/sh 2020-07-18 08:05:36 +01:00
precompiled-headers.h precompiled-headers.h: Don't include our own headers 2020-05-04 22:40:02 +02:00
README.md README: Fix link to hacking guide 2020-07-22 13:45:15 +02:00
shell.nix Add back flake-compat shell.nix 2020-07-17 14:58:59 +00:00

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 build nix from source with nix-build or how to get a development environment.

Additional Resources

License

Nix is released under the LGPL v2.1.