Merge branch 'master' into core-updates

3 files changed, 43 insertions, 7 deletions

diff --git a/guix/import/cran.scm b/guix/import/cran.scm
index f9369414cd..e839af5de2 100644
--- a/guix/import/cran.scm
+++ b/guix/import/cran.scm
@@ -111,11 +111,11 @@ package definition."
 (define %cran-url "http://cran.r-project.org/web/packages/")
 (define %bioconductor-url "http://bioconductor.org/packages/")
 
-;; The latest Bioconductor release is 3.3.  Bioconductor packages should be
+;; The latest Bioconductor release is 3.4.  Bioconductor packages should be
 ;; updated together.
 (define %bioconductor-svn-url
   (string-append "https://readonly:readonly@"
-                 "hedgehog.fhcrc.org/bioconductor/branches/RELEASE_3_3/"
+                 "hedgehog.fhcrc.org/bioconductor/branches/RELEASE_3_4/"
                  "madman/Rpacks/"))
 
 
diff --git a/guix/scripts/package.scm b/guix/scripts/package.scm
index b87aee0be9..70ed0a7ea6 100644
--- a/guix/scripts/package.scm
+++ b/guix/scripts/package.scm
@@ -3,6 +3,8 @@
 ;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org>
 ;;; Copyright © 2013, 2015 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2014, 2016 Alex Kost <alezost@gmail.com>
+;;; Copyright © 2016 Roel Janssen <roel@gnu.org>
+;;; Copyright © 2016 Benz Schenk <benz.schenk@uzh.ch>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -667,24 +669,30 @@ processed, #f otherwise."
                      ((head tail ...) head))))
     (match (assoc-ref opts 'query)
       (('list-generations pattern)
-       (define (list-generation number)
+       (define (list-generation display-function number)
          (unless (zero? number)
            (display-generation profile number)
-           (display-profile-content profile number)
+           (display-function profile number)
            (newline)))
-
+       (define (diff-profiles profile numbers)
+         (unless (null-list? (cdr numbers))
+           (display-profile-content-diff profile (car numbers) (cadr numbers))
+           (diff-profiles profile (cdr numbers))))
        (cond ((not (file-exists? profile))      ; XXX: race condition
               (raise (condition (&profile-not-found-error
                                  (profile profile)))))
              ((string-null? pattern)
-              (for-each list-generation (profile-generations profile)))
+              (list-generation display-profile-content
+                               (car (profile-generations profile)))
+              (diff-profiles profile (profile-generations profile)))
              ((matching-generations pattern profile)
               =>
               (lambda (numbers)
                 (if (null-list? numbers)
                     (exit 1)
                     (leave-on-EPIPE
-                     (for-each list-generation numbers)))))
+                     (list-generation display-profile-content (car numbers))
+                     (diff-profiles profile numbers)))))
              (else
               (leave (_ "invalid syntax: ~a~%")
                      pattern)))
diff --git a/guix/ui.scm b/guix/ui.scm
index eb85df3b18..9af8648211 100644
--- a/guix/ui.scm
+++ b/guix/ui.scm
@@ -7,6 +7,8 @@
 ;;; Copyright © 2014, 2015 Alex Kost <alezost@gmail.com>
 ;;; Copyright © 2015 David Thompson <davet@gnu.org>
 ;;; Copyright © 2015, 2016 Mathieu Lirzin <mthl@gnu.org>
+;;; Copyright © 2016 Roel Janssen <roel@gnu.org>
+;;; Copyright © 2016 Benz Schenk <benz.schenk@uzh.ch>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -87,6 +89,7 @@
             matching-generations
             display-generation
             display-profile-content
+            display-profile-content-diff
             roll-back*
             switch-to-generation*
             delete-generation*
@@ -1070,6 +1073,31 @@ DURATION-RELATION with the current time."
           (format #t (_ "~a\t(current)~%") header)
           (format #t "~a~%" header)))))
 
+(define (display-profile-content-diff profile gen1 gen2)
+  "Display the changed packages in PROFILE GEN2 compared to generation GEN2."
+
+  (define (equal-entry? first second)
+    (string= (manifest-entry-item first) (manifest-entry-item second)))
+
+  (define (display-entry entry prefix)
+    (match entry
+      (($ <manifest-entry> name version output location _)
+       (format #t " ~a ~a\t~a\t~a\t~a~%" prefix name version output location))))
+
+  (define (list-entries number)
+    (manifest-entries (profile-manifest (generation-file-name profile number))))
+
+  (define (display-diff profile old new)
+    (display-generation profile new)
+    (let ((added (lset-difference
+                  equal-entry? (list-entries new) (list-entries old)))
+          (removed (lset-difference
+                    equal-entry? (list-entries old) (list-entries new))))
+      (for-each (cut display-entry <> "+") added)
+      (for-each (cut display-entry <> "-") removed)))
+
+  (display-diff profile gen1 gen2))
+
 (define (display-profile-content profile number)
   "Display the packages in PROFILE, generation NUMBER, in a human-readable
 way."