diff options
| author | Ludovic Courtès <ludo@gnu.org> | 2018-04-08 16:22:25 +0200 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2018-04-08 17:41:08 +0200 |
| commit | b244ae25f9d5d09ef62f59249c794601b1433886 (patch) | |
| tree | 454e70bf31adc33c2424ec874bf1925d784ce777 | |
| parent | e40aa54e98aa6329e6196fd29e7e4e34ce3a063c (diff) | |
gexp: 'directory-union' has a #:resolve-collision parameter.
* guix/gexp.scm (directory-union): Add #:resolve-collision and honor it.
| -rw-r--r-- | guix/gexp.scm | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/guix/gexp.scm b/guix/gexp.scm index b47965d9eb..448eeed3f1 100644 --- a/guix/gexp.scm +++ b/guix/gexp.scm @@ -1250,7 +1250,8 @@ This yields an 'etc' directory containing these two files." files)))))) (define* (directory-union name things - #:key (copy? #f) (quiet? #f)) + #:key (copy? #f) (quiet? #f) + (resolve-collision 'warn-about-collision)) "Return a directory that is the union of THINGS, where THINGS is a list of file-like objects denoting directories. For example: @@ -1258,6 +1259,10 @@ file-like objects denoting directories. For example: yields a directory that is the union of the 'guile' and 'emacs' packages. +Call RESOLVE-COLLISION when several files collide, passing it the list of +colliding files. RESOLVE-COLLISION must return the chosen file or #f, in +which case the colliding entry is skipped altogether. + When HARD-LINKS? is true, create hard links instead of symlinks. When QUIET? is true, the derivation will not print anything." (define symlink @@ -1281,12 +1286,16 @@ is true, the derivation will not print anything." (computed-file name (with-imported-modules '((guix build union)) (gexp (begin - (use-modules (guix build union)) + (use-modules (guix build union) + (srfi srfi-1)) ;for 'first' and 'last' + (union-build (ungexp output) '(ungexp things) #:log-port (ungexp log-port) - #:symlink (ungexp symlink))))))))) + #:symlink (ungexp symlink) + #:resolve-collision + (ungexp resolve-collision))))))))) ;;; |