Merge pull request #3458 from zimbatm/nix-user-conf-dir

NIX_USER_CONF_FILES

tests/common.sh.in

@@ -11,6 +11,7 @@ export NIX_LOCALSTATE_DIR=$TEST_ROOT/var
 export NIX_LOG_DIR=$TEST_ROOT/var/log/nix
 export NIX_STATE_DIR=$TEST_ROOT/var/nix
 export NIX_CONF_DIR=$TEST_ROOT/etc
+unset NIX_USER_CONF_FILES
 export _NIX_TEST_SHARED=$TEST_ROOT/shared
 if [[ -n $NIX_STORE ]]; then
     export _NIX_TEST_NO_SANDBOX=1
@@ -21,6 +22,8 @@ export NIX_REMOTE=$NIX_REMOTE_
 unset NIX_PATH
 export TEST_HOME=$TEST_ROOT/test-home
 export HOME=$TEST_HOME
+unset XDG_CONFIG_HOME
+unset XDG_CONFIG_DIRS
 unset XDG_CACHE_HOME
 mkdir -p $TEST_HOME
 

tests/config.sh

@@ -0,0 +1,18 @@
+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 ]]

tests/config/nix-with-substituters.conf

@@ -0,0 +1,2 @@
+experimental-features = nix-command
+substituters = https://example.com

tests/local.mk

@@ -1,5 +1,6 @@
 nix_tests = \
   init.sh hash.sh lang.sh add.sh simple.sh dependencies.sh \
+  config.sh \
   gc.sh \
   gc-concurrent.sh \
   gc-auto.sh \