store: Remove the `fixed?' parameter from `add-to-store'.

* guix/store.scm (add-to-store): Remove the `fixed?' parameter from the
  public interface.
* gnu/packages/bootstrap.scm, guix-download.in, guix/derivations.scm,
  guix/packages.scm, tests/derivations.scm: Update all callers
  accordingly.

gnu/packages/bootstrap.scm

@@ -154,7 +154,7 @@ check whether everything is alright."
               (description "Raw build system with direct store access")
               (build (lambda* (store name source inputs #:key outputs system)
                        (define (->store file)
-                         (add-to-store store file #t #t "sha256"
+                         (add-to-store store file #t "sha256"
                                        (or (search-bootstrap-binary file
                                                                     system)
                                            (error "bootstrap binary not found"

guix-download.in

@@ -68,7 +68,7 @@ store path."
               (fetch temp))))
        (close port)
        (and result
-            (add-to-store store name #t #f "sha256" temp))))))
+            (add-to-store store name #f "sha256" temp))))))
 
 ;;;
 ;;; Command-line options.
@@ -148,7 +148,7 @@ and the hash of its contents.\n"))
          (path  (case (uri-scheme uri)
                   ((file)
                    (add-to-store store (basename (uri-path uri))
-                                 #t #f "sha256" (uri-path uri)))
+                                 #f "sha256" (uri-path uri)))
                   (else
                    (fetch-and-store store
                                     (cut url-fetch arg <>

guix/derivations.scm

@@ -458,7 +458,7 @@ known in advance, such as a file download."
                            ((input . _)
                             (let ((path (add-to-store store
                                                       (basename input)
-                                                      #t #t "sha256" input)))
+                                                      #t "sha256" input)))
                               (make-derivation-input path '()))))
                           (delete-duplicates inputs)))
          (env-vars   (env-vars-with-empty-outputs))
@@ -519,7 +519,7 @@ system, imported, and appears under FINAL-PATH in the resulting store path."
   (let* ((files   (map (match-lambda
                         ((final-path . file-name)
                          (list final-path
-                               (add-to-store store (basename final-path) #t #f
+                               (add-to-store store (basename final-path) #f
                                              "sha256" file-name))))
                        files))
          (builder

guix/packages.scm

@@ -248,8 +248,7 @@ PACKAGE for SYSTEM."
   (define (intern file)
     ;; Add FILE to the store.  Set the `recursive?' bit to #t, so that
     ;; file permissions are preserved.
-    (add-to-store store (basename file)
-                  #t #t "sha256" file))
+    (add-to-store store (basename file) #t "sha256" file))
 
   (define expand-input
     ;; Expand the given input tuple such that it contains only

guix/store.scm

@@ -496,14 +496,17 @@ path."
                                                (file file-name))
                                  #f
                                  store-path)))
-    (lambda (server basename fixed? recursive? hash-algo file-name)
-      "Add the contents of FILE-NAME under BASENAME to the store.  Note that
-FIXED? is for backward compatibility with old Nix versions and must be #t."
+    (lambda (server basename recursive? hash-algo file-name)
+      "Add the contents of FILE-NAME under BASENAME to the store.  When
+RECURSIVE? is true and FILE-NAME designates a directory, the contents of
+FILE-NAME are added recursively; if FILE-NAME designates a flat file and
+RECURSIVE? is true, its contents are added, and its permission bits are
+kept.  HASH-ALGO must be a string such as \"sha256\"."
       (let* ((st    (stat file-name #f))
              (args  `(,basename ,recursive? ,hash-algo ,st))
              (cache (nix-server-add-to-store-cache server)))
         (or (and st (hash-ref cache args))
-            (let ((path (add-to-store server basename fixed? recursive?
+            (let ((path (add-to-store server basename #t recursive?
                                       hash-algo file-name)))
               (hash-set! cache args path)
               path))))))

tests/derivations.scm

@@ -51,7 +51,7 @@
 (define %bash
   (let ((bash (search-bootstrap-binary "bash" (%current-system))))
     (and %store
-         (add-to-store %store "bash" #t #t "sha256" bash))))
+         (add-to-store %store "bash" #t "sha256" bash))))
 
 (define (directory-contents dir)
   "Return an alist representing the contents of DIR."
@@ -86,7 +86,7 @@
 
 (test-assert "add-to-store, flat"
   (let* ((file (search-path %load-path "language/tree-il/spec.scm"))
-         (drv  (add-to-store %store "flat-test" #t #f "sha256" file)))
+         (drv  (add-to-store %store "flat-test" #f "sha256" file)))
     (and (eq? 'regular (stat:type (stat drv)))
          (valid-path? %store drv)
          (equal? (call-with-input-file file get-bytevector-all)
@@ -94,7 +94,7 @@
 
 (test-assert "add-to-store, recursive"
   (let* ((dir (dirname (search-path %load-path "language/tree-il/spec.scm")))
-         (drv (add-to-store %store "dir-tree-test" #t #t "sha256" dir)))
+         (drv (add-to-store %store "dir-tree-test" #t "sha256" dir)))
     (and (eq? 'directory (stat:type (stat drv)))
          (valid-path? %store drv)
          (equal? (directory-contents dir)
@@ -145,7 +145,7 @@
                                     ;; name to the builder.
                                     . ,(add-to-store %store
                                                      (basename input)
-                                                     #t #t "sha256"
+                                                     #t "sha256"
                                                      input)))
                                  `((,builder)
                                    (,input)))))   ; ← local file name