Merge branch 'master' into core-updates

2 files changed, 68 insertions, 35 deletions

diff --git a/guix/build/emacs-build-system.scm b/guix/build/emacs-build-system.scm
index bd0d2e0266..b779847424 100644
--- a/guix/build/emacs-build-system.scm
+++ b/guix/build/emacs-build-system.scm
@@ -2,6 +2,7 @@
 ;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
 ;;; Copyright © 2016 David Thompson <davet@gnu.org>
 ;;; Copyright © 2016 Alex Kost <alezost@gmail.com>
+;;; Copyright © 2018 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -42,7 +43,8 @@
 ;; Directory suffix where we install ELPA packages.  We avoid ".../elpa" as
 ;; Emacs expects to find the ELPA repository 'archive-contents' file and the
 ;; archive signature.
-(define %install-suffix "/share/emacs/site-lisp/guix.d")
+(define %legacy-install-suffix "/share/emacs/site-lisp")
+(define %install-suffix (string-append %legacy-install-suffix "/guix.d"))
 
 ;; These are the default inclusion/exclusion regexps for the install phase.
 (define %default-include '("^[^/]*\\.el$" "^[^/]*\\.info$" "^doc/.*\\.info$"))
@@ -72,38 +74,63 @@ archive, a directory, or an Emacs Lisp file."
         #t)
       (gnu:unpack #:source source)))
 
+(define* (set-emacs-load-path #:key inputs #:allow-other-keys)
+  "Set the EMACSLOADPATH environment variable so that dependencies are found."
+  (let* ((input-elisp-dirs (emacs-inputs-el-directories
+                            (emacs-inputs-directories inputs)))
+         (emacs-load-path-value (string-join
+                                 input-elisp-dirs ":" 'suffix)))
+    (setenv "EMACSLOADPATH" emacs-load-path-value)
+    (format #t "environment variable `EMACSLOADPATH' set to ~a\n"
+            emacs-load-path-value)))
+
 (define* (build #:key outputs inputs #:allow-other-keys)
   "Compile .el files."
   (let* ((emacs (string-append (assoc-ref inputs "emacs") "/bin/emacs"))
          (out (assoc-ref outputs "out"))
          (elpa-name-ver (store-directory->elpa-name-version out))
-         (el-dir (string-append out %install-suffix "/" elpa-name-ver))
-         (deps-dirs (emacs-inputs-directories inputs)))
+         (el-dir (string-append out %install-suffix "/" elpa-name-ver)))
     (setenv "SHELL" "sh")
     (parameterize ((%emacs emacs))
-      (emacs-byte-compile-directory el-dir
-                                    (emacs-inputs-el-directories deps-dirs)))))
+      (emacs-byte-compile-directory el-dir))))
 
 (define* (patch-el-files #:key outputs #:allow-other-keys)
   "Substitute the absolute \"/bin/\" directory with the right location in the
 store in '.el' files."
+
+  (define (file-contains-nul-char? file)
+    (call-with-input-file file
+      (lambda (in)
+        (let loop ((line (read-line in 'concat)))
+          (cond
+           ((eof-object? line) #f)
+           ((string-index line #\nul) #t)
+           (else (loop (read-line in 'concat))))))
+      #:binary #t))
+
   (let* ((out (assoc-ref outputs "out"))
          (elpa-name-ver (store-directory->elpa-name-version out))
          (el-dir (string-append out %install-suffix "/" elpa-name-ver))
-         (substitute-cmd (lambda ()
-                           (substitute* (find-files "." "\\.el$")
-                             (("\"/bin/([^.]\\S*)\"" _ cmd-name)
-                              (let ((cmd (which cmd-name)))
-                                (unless cmd
-                                  (error
-                                   "patch-el-files: unable to locate " cmd-name))
-                                (string-append "\"" cmd "\"")))))))
+
+         ;; (ice-9 regex) uses libc's regexp routines, which cannot deal with
+         ;; strings containing NULs.  Filter out such files.  TODO: Remove
+         ;; this workaround when <https://bugs.gnu.org/30116> is fixed.
+         (el-files (remove file-contains-nul-char?
+                           (find-files (getcwd) "\\.el$"))))
+    (define (substitute-program-names)
+      (substitute* el-files
+        (("\"/bin/([^.]\\S*)\"" _ cmd-name)
+         (let ((cmd (which cmd-name)))
+           (unless cmd
+             (error "patch-el-files: unable to locate " cmd-name))
+           (string-append "\"" cmd "\"")))))
+
     (with-directory-excursion el-dir
-      ;; Some old '.el' files (e.g., tex-buf.el in AUCTeX) are still encoded
-      ;; with the "ISO-8859-1" locale.
-      (unless (false-if-exception (substitute-cmd))
+      ;; Some old '.el' files (e.g., tex-buf.el in AUCTeX) are still
+      ;; ISO-8859-1-encoded.
+      (unless (false-if-exception (substitute-program-names))
         (with-fluids ((%default-port-encoding "ISO-8859-1"))
-          (substitute-cmd))))
+          (substitute-program-names))))
     #t))
 
 (define* (install #:key outputs
@@ -199,18 +226,27 @@ store in '.el' files."
     (match inputs
       (((names . directories) ...) directories))))
 
+(define (emacs-input->el-directory emacs-input)
+  "Return the correct Elisp directory location of EMACS-INPUT or #f if none."
+  (let ((legacy-elisp-dir (string-append emacs-input %legacy-install-suffix))
+        (guix-elisp-dir (string-append
+                         emacs-input %install-suffix "/"
+                         (store-directory->elpa-name-version emacs-input))))
+    (cond
+     ((file-exists? guix-elisp-dir) guix-elisp-dir)
+     ((file-exists? legacy-elisp-dir) legacy-elisp-dir)
+     (else (format #t "warning: could not locate elisp directory under `~a'\n"
+                   emacs-input)
+           #f))))
+
 (define (emacs-inputs-el-directories dirs)
   "Build the list of Emacs Lisp directories from the Emacs package directory
 DIRS."
-  (append-map (lambda (d)
-                (list (string-append d "/share/emacs/site-lisp")
-                      (string-append d %install-suffix "/"
-                                     (store-directory->elpa-name-version d))))
-              dirs))
+  (filter-map emacs-input->el-directory dirs))
 
 (define (package-name-version->elpa-name-version name-ver)
   "Convert the Guix package NAME-VER to the corresponding ELPA name-version
-format.  Essnetially drop the prefix used in Guix."
+format.  Essentially drop the prefix used in Guix."
   (if (emacs-package? name-ver)  ; checks for "emacs-" prefix
       (string-drop name-ver (string-length "emacs-"))
       name-ver))
@@ -224,12 +260,14 @@ second hyphen.  This corresponds to 'name-version' as used in ELPA packages."
 
 (define %standard-phases
   (modify-phases gnu:%standard-phases
+    (add-after 'set-paths 'set-emacs-load-path set-emacs-load-path)
     (replace 'unpack unpack)
     (delete 'configure)
-    (delete 'check)
-    (delete 'install)
-    (replace 'build build)
-    (add-before 'build 'install install)
+    ;; Move the build phase after install: the .el files are byte compiled
+    ;; directly in the store.
+    (delete 'build)
+    (replace 'install install)
+    (add-after 'install 'build build)
     (add-after 'install 'make-autoloads make-autoloads)
     (add-after 'make-autoloads 'patch-el-files patch-el-files)
     (add-after 'make-autoloads 'move-doc move-doc)))
diff --git a/guix/build/emacs-utils.scm b/guix/build/emacs-utils.scm
index fd06aad7ac..8389ca582f 100644
--- a/guix/build/emacs-utils.scm
+++ b/guix/build/emacs-utils.scm
@@ -58,14 +58,9 @@
                   (update-directory-autoloads ,directory))))
     (emacs-batch-eval expr)))
 
-(define* (emacs-byte-compile-directory dir #:optional (dependency-dirs '()))
-  "Byte compile all files in DIR and its sub-directories.  Before compiling
-the files, add DIR and all directories in DEPENDENCY-DIRS to 'load-path'."
-  (let ((expr `(progn
-                (add-to-list 'load-path ,dir)
-                (when ',dependency-dirs
-                  (setq load-path (append ',dependency-dirs load-path)))
-                (byte-recompile-directory (file-name-as-directory ,dir) 0))))
+(define* (emacs-byte-compile-directory dir)
+  "Byte compile all files in DIR and its sub-directories."
+  (let ((expr `(byte-recompile-directory (file-name-as-directory ,dir) 0)))
     (emacs-batch-eval expr)))
 
 (define-syntax emacs-substitute-sexps