diff options
Diffstat (limited to 'guix/gexp.scm')
| -rw-r--r-- | guix/gexp.scm | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/guix/gexp.scm b/guix/gexp.scm index b9525603ee..e8ac3dcdc8 100644 --- a/guix/gexp.scm +++ b/guix/gexp.scm @@ -1204,13 +1204,24 @@ This yields an 'etc' directory containing these two files." (ungexp target)))))) files)))))) -(define (directory-union name things) +(define* (directory-union name things + #:key (copy? #f)) "Return a directory that is the union of THINGS, where THINGS is a list of file-like objects denoting directories. For example: (directory-union \"guile+emacs\" (list guile emacs)) -yields a directory that is the union of the 'guile' and 'emacs' packages." +yields a directory that is the union of the 'guile' and 'emacs' packages. + +When COPY? is true, copy files instead of creating symlinks." + (define symlink + (if copy? + (gexp (lambda (old new) + (if (file-is-directory? old) + (symlink old new) + (copy-file old new)))) + (gexp symlink))) + (match things ((one) ;; Only one thing; return it. @@ -1221,7 +1232,9 @@ yields a directory that is the union of the 'guile' and 'emacs' packages." (gexp (begin (use-modules (guix build union)) (union-build (ungexp output) - '(ungexp things))))))))) + '(ungexp things) + + #:symlink (ungexp symlink))))))))) ;;; |