packages: Remove now redundant graph procedures.

These procedures are now redundant with those in (guix graph) and are no
longer used since commit a51cbecb.

* gnu/packages.scm (vhash-refq, package-dependencies)
(package-direct-dependents, package-transitive-dependents)
(package-covering-dependents): Remove.

1 files changed, 0 insertions, 61 deletions

diff --git a/gnu/packages.scm b/gnu/packages.scm
index fb277389c7..b309a7806d 100644
--- a/gnu/packages.scm
+++ b/gnu/packages.scm
@@ -46,10 +46,6 @@
             find-best-packages-by-name
             find-newest-available-packages
 
-            package-direct-dependents
-            package-transitive-dependents
-            package-covering-dependents
-
             check-package-freshness
 
             specification->package
@@ -263,63 +259,6 @@ VERSION."
         (#f '()))))
 
 
-(define* (vhash-refq vhash key #:optional (dflt #f))
-  "Look up KEY in the vhash VHASH, and return the value (if any) associated
-with it.  If KEY is not found, return DFLT (or `#f' if no DFLT argument is
-supplied).  Uses `eq?' for equality testing."
-  (or (and=> (vhash-assq key vhash) cdr)
-      dflt))
-
-(define package-dependencies
-  (memoize
-   (lambda ()
-     "Return a vhash keyed by package, and with associated values that are a
-list of packages that depend on that package."
-     (fold-packages
-      (lambda (package dag)
-        (fold
-         (lambda (in d)
-           ;; Insert a graph edge from each of package's inputs to package.
-           (vhash-consq in
-                        (cons package (vhash-refq d in '()))
-                        (vhash-delq in d)))
-         dag
-         (match (package-direct-inputs package)
-           (((labels packages . _) ...)
-            packages) )))
-      vlist-null))))
-
-(define (package-direct-dependents packages)
-  "Return a list of packages from the distribution that directly depend on the
-packages in PACKAGES."
-  (delete-duplicates
-   (concatenate
-    (map (lambda (p)
-           (vhash-refq (package-dependencies) p '()))
-         packages))))
-
-(define (package-transitive-dependents packages)
-  "Return the transitive dependent packages of the distribution packages in
-PACKAGES---i.e. the dependents of those packages, plus their dependents,
-recursively."
-  (let ((dependency-dag (package-dependencies)))
-    (fold-tree
-     cons '()
-     (lambda (node) (vhash-refq dependency-dag node))
-     ;; Start with the dependents to avoid including PACKAGES in the result.
-     (package-direct-dependents packages))))
-
-(define (package-covering-dependents packages)
-  "Return a minimal list of packages from the distribution whose dependencies
-include all of PACKAGES and all packages that depend on PACKAGES."
-  (let ((dependency-dag (package-dependencies)))
-    (fold-tree-leaves
-     cons '()
-     (lambda (node) (vhash-refq dependency-dag node))
-     ;; Start with the dependents to avoid including PACKAGES in the result.
-     (package-direct-dependents packages))))
-
-
 (define %sigint-prompt
   ;; The prompt to jump to upon SIGINT.
   (make-prompt-tag "interruptible"))