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| author | Arun Isaac <arunisaac@systemreboot.net> | 2022-06-13 16:57:40 +0530 |
|---|---|---|
| committer | Arun Isaac <arunisaac@systemreboot.net> | 2022-06-25 01:43:04 +0530 |
| commit | 2c05a6112b40c85dd0509052a6a6b97fa127f1c6 (patch) | |
| tree | 4c0a52244ca7522c98428f14d6e30fae6a278bb4 /guix/build | |
| parent | 22aeda1bcc15db33f021c344a95d75984449d72a (diff) | |
utils: Move switch-symlinks to (guix build utils).
* guix/utils.scm (switch-symlinks): Move to ...
* guix/build/utils.scm (switch-symlinks): ... here.
* guix/profiles.scm, guix/scripts/home.scm, guix/scripts/package.scm: Import
switch-symlinks from (guix build utils).
* guix/scripts/system/reconfigure.scm (switch-system-program): Import (guix
build utils) in G-expression.
Diffstat (limited to 'guix/build')
| -rw-r--r-- | guix/build/utils.scm | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/guix/build/utils.scm b/guix/build/utils.scm index b822caf619..ce7bdb2024 100644 --- a/guix/build/utils.scm +++ b/guix/build/utils.scm @@ -60,6 +60,7 @@ directory-exists? executable-file? symbolic-link? + switch-symlinks call-with-temporary-output-file call-with-ascii-input-file file-header-match @@ -240,6 +241,13 @@ introduce the version part." "Return #t if FILE is a symbolic link (aka. \"symlink\".)" (eq? (stat:type (lstat file)) 'symlink)) +(define (switch-symlinks link target) + "Atomically switch LINK, a symbolic link, to point to TARGET. Works +both when LINK already exists and when it does not." + (let ((pivot (string-append link ".new"))) + (symlink target pivot) + (rename-file pivot link))) + (define (call-with-temporary-output-file proc) "Call PROC with a name of a temporary file and open output port to that file; close the file and delete it when leaving the dynamic extent of this |