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add NIX_USER_CONF_FILES

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Motivation: maintain project-level configuration files.

Document the whole situation a bit better so that it corresponds to the
implementation, and add NIX_USER_CONF_FILES that allows overriding
which user files Nix will load during startup.
This commit is contained in:
zimbatm 2020-03-30 15:31:14 +02:00
parent 3abf6d03c6
commit 895516cadf
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10 changed files with 87 additions and 25 deletions
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tests/config.sh Normal file
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source common.sh
# Test that files are loaded from XDG by default
export XDG_CONFIG_HOME=/tmp/home
export XDG_CONFIG_DIRS=/tmp/dir1:/tmp/dir2
files=$(nix-build --verbose --version | grep "User config" | cut -d ':' -f2- | xargs)
[[ $files == "/tmp/home/nix/nix.conf:/tmp/dir1/nix/nix.conf:/tmp/dir2/nix/nix.conf" ]]
# Test that setting NIX_USER_CONF_FILES overrides all the default user config files
export NIX_USER_CONF_FILES=/tmp/file1.conf:/tmp/file2.conf
files=$(nix-build --verbose --version | grep "User config" | cut -d ':' -f2- | xargs)
[[ $files == "/tmp/file1.conf:/tmp/file2.conf" ]]
# Test that it's possible to load the config from a custom location
here=$(readlink -f "$(dirname "${BASH_SOURCE[0]}")")
export NIX_USER_CONF_FILES=$here/config/nix-with-substituters.conf
var=$(nix show-config | grep '^substituters =' | cut -d '=' -f 2 | xargs)
[[ $var == https://example.com ]]