packages: Add 'file-type' field to 'search-path-specification'.

Fixes <http://bugs.gnu.org/18033>.

* guix/packages.scm (<search-path-specification>): Rename 'directories'
  field to 'files'.  Add 'file-type'.
  (search-path-specification->sexp): Honor 'file-type'.
* gnu/packages/autotools.scm, gnu/packages/bootstrap.scm,
  gnu/packages/cross-base.scm, gnu/packages/games.scm,
  gnu/packages/gcc.scm, gnu/packages/glib.scm,
  gnu/packages/guile.scm, gnu/packages/man.scm,
  gnu/packages/perl.scm, gnu/packages/pkg-config.scm,
  gnu/packages/python.scm, gnu/packages/ruby.scm,
  gnu/packages/xfce.scm: Change 'directories' to 'files'.
* tests/packages.scm ("search paths"): Change 'directories' field to
  'files'.
* guix/scripts/environment.scm (for-each-search-path): Likewise.

13 files changed, 22 insertions, 24 deletions

diff --git a/gnu/packages/autotools.scm b/gnu/packages/autotools.scm
index 0094577210..a3afcdcfff 100644
--- a/gnu/packages/autotools.scm
+++ b/gnu/packages/autotools.scm
@@ -178,7 +178,7 @@ exec ~a --no-auto-compile \"$0\" \"$@\"
     (native-search-paths
      (list (search-path-specification
             (variable "ACLOCAL_PATH")
-            (directories '("share/aclocal")))))
+            (files '("share/aclocal")))))
     (arguments
      '(#:modules ((guix build gnu-build-system)
                   (guix build utils)
diff --git a/gnu/packages/bootstrap.scm b/gnu/packages/bootstrap.scm
index 854d97bcfb..5a19783bb6 100644
--- a/gnu/packages/bootstrap.scm
+++ b/gnu/packages/bootstrap.scm
@@ -409,10 +409,10 @@ exec ~a/bin/.gcc-wrapped -B~a/lib \
     (native-search-paths
      (list (search-path-specification
             (variable "CPATH")
-            (directories '("include")))
+            (files '("include")))
            (search-path-specification
             (variable "LIBRARY_PATH")
-            (directories '("lib" "lib64")))))
+            (files '("lib" "lib64")))))
     (synopsis "Bootstrap binaries of the GNU Compiler Collection")
     (description #f)
     (home-page #f)
diff --git a/gnu/packages/cross-base.scm b/gnu/packages/cross-base.scm
index 74809d08f9..0f32c9fab9 100644
--- a/gnu/packages/cross-base.scm
+++ b/gnu/packages/cross-base.scm
@@ -234,10 +234,10 @@ GCC that does not target a libc; otherwise, target that libc."
     (search-paths
      (list (search-path-specification
             (variable "CROSS_CPATH")
-            (directories '("include")))
+            (files '("include")))
            (search-path-specification
             (variable "CROSS_LIBRARY_PATH")
-            (directories '("lib" "lib64")))))
+            (files '("lib" "lib64")))))
     (native-search-paths '())))
 
 (define* (cross-libc target
diff --git a/gnu/packages/games.scm b/gnu/packages/games.scm
index db878b033d..99a4a78c11 100644
--- a/gnu/packages/games.scm
+++ b/gnu/packages/games.scm
@@ -706,7 +706,7 @@ for common mesh file formats, and collision detection.")
     (native-search-paths
      (list (search-path-specification
             (variable "MINETEST_SUBGAME_PATH")
-            (directories '("share/minetest/games")))))
+            (files '("share/minetest/games")))))
     (native-inputs
      `(("pkg-config" ,pkg-config)))
     (inputs
diff --git a/gnu/packages/gcc.scm b/gnu/packages/gcc.scm
index 4b715f495e..e795f9749f 100644
--- a/gnu/packages/gcc.scm
+++ b/gnu/packages/gcc.scm
@@ -245,10 +245,10 @@ where the OS part is overloaded to denote a specific ABI---into GCC
       (native-search-paths
        (list (search-path-specification
               (variable "CPATH")
-              (directories '("include")))
+              (files '("include")))
              (search-path-specification
               (variable "LIBRARY_PATH")
-              (directories '("lib" "lib64")))))
+              (files '("lib" "lib64")))))
 
       (properties `((gcc-libc . ,(assoc-ref inputs "libc"))))
       (synopsis "GNU Compiler Collection")
diff --git a/gnu/packages/glib.scm b/gnu/packages/glib.scm
index 486cdb6add..93b465b130 100644
--- a/gnu/packages/glib.scm
+++ b/gnu/packages/glib.scm
@@ -183,7 +183,7 @@ shared NFS home directories.")
     ;; by 'glib-compile-schemas'.
     (list (search-path-specification
            (variable "XDG_DATA_DIRS")
-           (directories '("share")))))
+           (files '("share")))))
    (search-paths native-search-paths)
 
    (synopsis "Thread-safe general utility library; basis of GTK+ and GNOME")
@@ -225,7 +225,7 @@ dynamic loading, and an object system.")
     (native-search-paths
      (list (search-path-specification
             (variable "GI_TYPELIB_PATH")
-            (directories '("lib/girepository-1.0")))))
+            (files '("lib/girepository-1.0")))))
     (search-paths native-search-paths)
     (arguments
      `(#:phases
diff --git a/gnu/packages/guile.scm b/gnu/packages/guile.scm
index 6a76bafe84..7e3b5f847d 100644
--- a/gnu/packages/guile.scm
+++ b/gnu/packages/guile.scm
@@ -95,7 +95,7 @@
    (native-search-paths
     (list (search-path-specification
            (variable "GUILE_LOAD_PATH")
-           (directories '("share/guile/site")))))
+           (files '("share/guile/site")))))
 
    (synopsis "Scheme implementation intended especially for extensions")
    (description
@@ -155,10 +155,10 @@ without requiring the source code to be rewritten.")
    (native-search-paths
     (list (search-path-specification
            (variable "GUILE_LOAD_PATH")
-           (directories '("share/guile/site/2.0")))
+           (files '("share/guile/site/2.0")))
           (search-path-specification
            (variable "GUILE_LOAD_COMPILED_PATH")
-           (directories '("share/guile/site/2.0")))))
+           (files '("share/guile/site/2.0")))))
 
    (synopsis "Scheme implementation intended especially for extensions")
    (description
diff --git a/gnu/packages/man.scm b/gnu/packages/man.scm
index 028403ce74..712622aee8 100644
--- a/gnu/packages/man.scm
+++ b/gnu/packages/man.scm
@@ -105,7 +105,7 @@ a flexible and convenient way.")
     (native-search-paths
      (list (search-path-specification
             (variable "MANPATH")
-            (directories '("share/man")))))
+            (files '("share/man")))))
     (home-page "http://man-db.nongnu.org/")
     (synopsis "Standard Unix documentation system")
     (description
diff --git a/gnu/packages/perl.scm b/gnu/packages/perl.scm
index 03cad3e25f..699fe751de 100644
--- a/gnu/packages/perl.scm
+++ b/gnu/packages/perl.scm
@@ -66,7 +66,7 @@
         %standard-phases)))
     (native-search-paths (list (search-path-specification
                                 (variable "PERL5LIB")
-                                (directories '("lib/perl5/site_perl")))))
+                                (files '("lib/perl5/site_perl")))))
     (synopsis "Implementation of the Perl programming language")
     (description
      "Perl 5 is a highly capable, feature-rich programming language with over
diff --git a/gnu/packages/pkg-config.scm b/gnu/packages/pkg-config.scm
index dc4905a271..dd5120c474 100644
--- a/gnu/packages/pkg-config.scm
+++ b/gnu/packages/pkg-config.scm
@@ -44,8 +44,7 @@
    (native-search-paths
     (list (search-path-specification
            (variable "PKG_CONFIG_PATH")
-           (directories '("lib/pkgconfig" "lib64/pkgconfig"
-                          "share/pkgconfig")))))
+           (files '("lib/pkgconfig" "lib64/pkgconfig" "share/pkgconfig")))))
    (home-page "http://www.freedesktop.org/wiki/Software/pkg-config")
    (license gpl2+)
    (synopsis "Helper tool used when compiling applications and libraries")
diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index adb84fc5b7..90e1f8948c 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -198,7 +198,7 @@
     (native-search-paths
      (list (search-path-specification
             (variable "PYTHONPATH")
-            (directories '("lib/python2.7/site-packages")))))
+            (files '("lib/python2.7/site-packages")))))
     (home-page "http://python.org")
     (synopsis
      "High-level, dynamically-typed programming language")
@@ -237,7 +237,7 @@ data types.")
     (native-search-paths
      (list (search-path-specification
             (variable "PYTHONPATH")
-            (directories '("lib/python3.3/site-packages")))))))
+            (files '("lib/python3.3/site-packages")))))))
 
 (define-public python-wrapper
   (package (inherit python)
diff --git a/gnu/packages/ruby.scm b/gnu/packages/ruby.scm
index 4b6665cb6b..f8276db698 100644
--- a/gnu/packages/ruby.scm
+++ b/gnu/packages/ruby.scm
@@ -77,10 +77,9 @@
     (native-search-paths
      (list (search-path-specification
             (variable "GEM_PATH")
-            (directories
-             (list (string-append "lib/ruby/gems/"
-                                  (version-major+minor version)
-                                  ".0"))))))
+            (files (list (string-append "lib/ruby/gems/"
+                                        (version-major+minor version)
+                                        ".0"))))))
     (synopsis "Programming language interpreter")
     (description "Ruby is a dynamic object-oriented programming language with
 a focus on simplicity and productivity.")
diff --git a/gnu/packages/xfce.scm b/gnu/packages/xfce.scm
index 2b15c3e35c..17b2b4d9f7 100644
--- a/gnu/packages/xfce.scm
+++ b/gnu/packages/xfce.scm
@@ -267,7 +267,7 @@ management D-Bus specification.")
     (native-search-paths
      (list (search-path-specification
             (variable "X_XFCE4_LIB_DIRS")
-            (directories '("lib/xfce4")))))
+            (files '("lib/xfce4")))))
     (home-page "http://www.xfce.org/")
     (synopsis "Xfce desktop panel")
     (description