[bug#70830] [PATCH] doc: Document assume-valid-file-name in local-file

[Richard Sent <richard@freakingpenguin.com>]

doc/guix.texi (G-Expressions): Document the use of assume-valid-file-name with
local-file.
---
Hi Guix!

I found it odd that assume-valid-file-name isn't documented in the
manual. Well, now it is!

 doc/guix.texi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/doc/guix.texi b/doc/guix.texi
index 1c1e0164e7..221db5c022 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -12154,6 +12154,18 @@ G-Expressions
 absolute file name and @var{stat} is the result of @code{lstat}; exclude
 entries for which @var{select?} does not return true.
 
+@var{file} can be wrapped in the @code{assume-valid-file-name} syntactic
+keyword. When this is done, there will not be a warning when
+@code{local-file} is used with a non-literal path.  The path is still
+looked up relative to the current working directory at run time.
+Wrapping is done like this:
+
+@lisp
+(define alice-key-file-path "alice.pub")
+;; ...
+(local-file (assume-valid-file-name alice-key-file-path))
+@end lisp
+
 This is the declarative counterpart of the @code{interned-file} monadic
 procedure (@pxref{The Store Monad, @code{interned-file}}).
 @end deffn

base-commit: da41a8f5e85774e2a507d821b5d52e600fb9d1d7
-- 
2.41.0