daemon: Rename 'NIX_STATE_DIR' and 'NIX_DB_DIR' environment variables.

Fixes <https://bugs.gnu.org/22459>.
Reported by Jeff Mickey <j@codemac.net>.

* guix/config.scm.in (%state-directory): Change NIX_STATE_DIR to
GUIX_STATE_DIRECTORY.
(%store-database-directory): Change NIX_DB_DIR to
GUIX_DATABASE_DIRECTORY.
* nix/libstore/globals.cc (Settings::processEnvironment): Likewise.
* guix/self.scm (make-config.scm): Likewise.
* build-aux/build-self.scm (make-config.scm): Likewise.
* build-aux/test-env.in: Likewise.
* tests/derivations.scm ("derivation #:leaked-env-vars"): Likewise.
* tests/guix-build.sh (GUIX_DAEMON_SOCKET): Likewise.
* tests/guix-daemon.sh (socket): Likewise.

3 files changed, 11 insertions, 10 deletions

diff --git a/tests/derivations.scm b/tests/derivations.scm
index c0601c0e88d..dbb5b584eb4 100644
--- a/tests/derivations.scm
+++ b/tests/derivations.scm
@@ -650,18 +650,19 @@
       (build-derivations %store (list drv))
       #f)))
 
-;; Here we should get the value of $NIX_STATE_DIR that the daemon sees, which
-;; is a unique value for each test process; this value is the same as the one
-;; we see in the process executing this file since it is set by 'test-env'.
+;; Here we should get the value of $GUIX_STATE_DIRECTORY that the daemon sees,
+;; which is a unique value for each test process; this value is the same as
+;; the one we see in the process executing this file since it is set by
+;; 'test-env'.
 (test-equal "derivation #:leaked-env-vars"
-  (getenv "NIX_STATE_DIR")
-  (let* ((value (getenv "NIX_STATE_DIR"))
+  (getenv "GUIX_STATE_DIRECTORY")
+  (let* ((value (getenv "GUIX_STATE_DIRECTORY"))
          (drv   (derivation %store "leaked-env-vars" %bash
-                            '("-c" "echo -n $NIX_STATE_DIR > $out")
+                            '("-c" "echo -n $GUIX_STATE_DIRECTORY > $out")
                             #:hash (sha256 (string->utf8 value))
                             #:hash-algo 'sha256
                             #:inputs `((,%bash))
-                            #:leaked-env-vars '("NIX_STATE_DIR"))))
+                            #:leaked-env-vars '("GUIX_STATE_DIRECTORY"))))
     (and (build-derivations %store (list drv))
          (call-with-input-file (derivation->output-path drv)
            get-string-all))))
diff --git a/tests/guix-build.sh b/tests/guix-build.sh
index 7842ce87c62..66bf6be8d0c 100644
--- a/tests/guix-build.sh
+++ b/tests/guix-build.sh
@@ -1,5 +1,5 @@
 # GNU Guix --- Functional package management for GNU
-# Copyright © 2012, 2013, 2014, 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
+# Copyright © 2012, 2013, 2014, 2016, 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
 #
 # This file is part of GNU Guix.
 #
@@ -37,7 +37,7 @@ guix build hello -d |				\
     grep -e '-hello-[0-9\.]\+\.drv$'
 
 # Passing a URI.
-GUIX_DAEMON_SOCKET="file://$NIX_STATE_DIR/daemon-socket/socket" \
+GUIX_DAEMON_SOCKET="file://$GUIX_STATE_DIRECTORY/daemon-socket/socket"  \
 guix build -e '(@@ (gnu packages bootstrap) %bootstrap-guile)'
 
 ( if GUIX_DAEMON_SOCKET="weird://uri"                                   \
diff --git a/tests/guix-daemon.sh b/tests/guix-daemon.sh
index 4c19a55722f..ce82cfd1e6c 100644
--- a/tests/guix-daemon.sh
+++ b/tests/guix-daemon.sh
@@ -63,7 +63,7 @@ guile -c "
   (exit (has-substitutes? store \"$out\"))"
 
 # Now, run guix-daemon --no-substitutes.
-socket="$NIX_STATE_DIR/alternate-socket"
+socket="$GUIX_STATE_DIRECTORY/alternate-socket"
 guix-daemon --no-substitutes --listen="$socket" --disable-chroot &
 daemon_pid=$!
 trap 'kill $daemon_pid' EXIT