system: Cleanup bash startup files.

* gnu/system.scm (etc-directory) (bashrc): Rename to 'profile'.
* gnu/system/shadow.scm (default-skeletons): Rename '.bashrc' to
  '.bash_profile'. Don't source /etc/profile.

gnu/system.scm

@@ -386,11 +386,10 @@ This is the GNU system.  Welcome.\n")
        (nsswitch   (text-file "nsswitch.conf"
                               "hosts: files dns\n"))
 
-       ;; TODO: Generate bashrc from packages' search-paths.
-       (bashrc    (text-file* "bashrc"  "
-export PS1='\\u@\\h \\w\\$ '
-
-export LC_ALL=\"" locale "\"
+       ;; Startup file for POSIX-compliant login shells, which set system-wide
+       ;; environment variables.
+       (profile    (text-file* "profile"  "\
+export LANG=\"" locale "\"
 export TZ=\"" timezone "\"
 export TZDIR=\"" tzdata "/share/zoneinfo\"
 
@@ -399,11 +398,7 @@ export LINUX_MODULE_DIRECTORY=/run/booted-system/kernel/lib/modules
 
 export PATH=$HOME/.guix-profile/bin:/run/current-system/profile/bin
 export PATH=/run/setuid-programs:/run/current-system/profile/sbin:$PATH
-export CPATH=$HOME/.guix-profile/include:" profile "/include
-export LIBRARY_PATH=$HOME/.guix-profile/lib:" profile "/lib
 export INFOPATH=$HOME/.guix-profile/share/info:/run/current-system/profile/share/info
-alias ls='ls -p --color'
-alias ll='ls -l'
 "))
        (skel      (skeleton-directory skeletons)))
     (file-union "etc"
@@ -416,7 +411,7 @@ alias ll='ls -l'
                   ("nsswitch.conf" ,#~#$nsswitch)
                   ("skel" ,#~#$skel)
                   ("shells" ,#~#$shells)
-                  ("profile" ,#~#$bashrc)
+                  ("profile" ,#~#$profile)
                   ("hosts" ,#~#$hosts-file)
                   ("localtime" ,#~(string-append #$tzdata "/share/zoneinfo/"
                                                  #$timezone))

gnu/system/shadow.scm

@@ -115,9 +115,13 @@
         (copy-file (car (find-files #$guile-wm "wm-init-sample.scm"))
                    #$output)))
 
-  (mlet %store-monad ((bashrc (text-file "bashrc" "\
-# Allow non-login shells such as an xterm to get things right.
-test -f /etc/profile && source /etc/profile\n"))
+  (mlet %store-monad ((profile (text-file "bash_profile" "\
+# Honor per-interactive-shell startup file
+if [ -f ~/.bashrc ]; then . ~/.bashrc; fi\n"))
+                      (bashrc (text-file "bashrc" "\
+PS1='\\u@\\h \\w\\$ '
+alias ls='ls -p --color'
+alias ll='ls -l'\n"))
                       (guile-wm (gexp->derivation "guile-wm" copy-guile-wm
                                                   #:modules
                                                   '((guix build utils))))
@@ -127,7 +131,8 @@ XTerm*metaSendsEscape: true\n"))
                       (gdbinit   (text-file "gdbinit" "\
 # Tell GDB where to look for separate debugging files.
 set debug-file-directory ~/.guix-profile/lib/debug\n")))
-    (return `((".bashrc" ,bashrc)
+    (return `((".bash_profile" ,profile)
+              (".bashrc" ,bashrc)
               (".Xdefaults" ,xdefaults)
               (".guile-wm" ,guile-wm)
               (".gdbinit" ,gdbinit)))))