gexp: Add 'plain-file'.

* guix/gexp.scm (<plain-file>): New type.
  (plain-file, plain-file-compiler): New procedures.
* tests/gexp.scm ("one plain file"): New test.
* doc/guix.texi (G-Expressions): Document 'plain-file'.

1 files changed, 10 insertions, 0 deletions

diff --git a/tests/gexp.scm b/tests/gexp.scm
index f81ef39860..7e14073fd4 100644
--- a/tests/gexp.scm
+++ b/tests/gexp.scm
@@ -109,6 +109,16 @@
             (eq? x local)))
          (equal? `(display ,intd) (gexp->sexp* exp)))))
 
+(test-assert "one plain file"
+  (let* ((file     (plain-file "hi" "Hello, world!"))
+         (exp      (gexp (display (ungexp file))))
+         (expected (add-text-to-store %store "hi" "Hello, world!")))
+    (and (gexp? exp)
+         (match (gexp-inputs exp)
+           (((x "out"))
+            (eq? x file)))
+         (equal? `(display ,expected) (gexp->sexp* exp)))))
+
 (test-assert "same input twice"
   (let ((exp (gexp (begin
                      (display (ungexp coreutils))