diff options
Diffstat (limited to 'gnu/home/services/symlink-manager.scm')
| -rw-r--r-- | gnu/home/services/symlink-manager.scm | 240 |
1 files changed, 116 insertions, 124 deletions
diff --git a/gnu/home/services/symlink-manager.scm b/gnu/home/services/symlink-manager.scm index c60cdcffb7..25470209d1 100644 --- a/gnu/home/services/symlink-manager.scm +++ b/gnu/home/services/symlink-manager.scm @@ -88,12 +88,121 @@ appear only after all nested items already listed." (list (cons 'dir path)) (append-map (file-tree-traverse preordering) rest)))))) - #$%initialize-gettext + (define home-path + (getenv "HOME")) + + (define backup-dir + (string-append home-path "/" (number->string (current-time)) + "-guix-home-legacy-configs-backup")) + + (define (get-target-path path) + (string-append home-path "/." path)) + + (define (get-backup-path path) + (string-append backup-dir "/." path)) + + (define (directory? path) + (equal? (stat:type (stat path)) 'directory)) + + (define (empty-directory? dir) + (equal? (scandir dir) '("." ".."))) + + (define (symlink-to-store? path) + (and (equal? (stat:type (lstat path)) 'symlink) + (store-file-name? (readlink path)))) + + (define (backup-file path) + (mkdir-p backup-dir) + (format #t (G_ "Backing up ~a...") (get-target-path path)) + (mkdir-p (dirname (get-backup-path path))) + (rename-file (get-target-path path) (get-backup-path path)) + (display (G_ " done\n"))) + + (define (cleanup-symlinks old-tree) + ;; Delete from directory OLD-TREE symlinks that correspond to a + ;; previous generation. + (let ((to-delete ((file-tree-traverse #f) old-tree))) + (display + (G_ + "Cleaning up symlinks from previous home-environment.\n\n")) + (map + (match-lambda + (('dir . ".") + (display (G_ "Cleanup finished.\n\n"))) + + (('dir . path) + (if (and + (file-exists? (get-target-path path)) + (directory? (get-target-path path)) + (empty-directory? (get-target-path path))) + (begin + (format #t (G_ "Removing ~a...") + (get-target-path path)) + (rmdir (get-target-path path)) + (display (G_ " done\n"))) + (format + #t + (G_ "Skipping ~a (not an empty directory)... done\n") + (get-target-path path)))) + + (('file . path) + (when (file-exists? (get-target-path path)) + ;; DO NOT remove the file if it is no longer a symlink to + ;; the store, it will be backed up later during + ;; create-symlinks phase. + (if (symlink-to-store? (get-target-path path)) + (begin + (format #t (G_ "Removing ~a...") (get-target-path path)) + (delete-file (get-target-path path)) + (display (G_ " done\n"))) + (format + #t + (G_ "Skipping ~a (not a symlink to store)... done\n") + (get-target-path path)))))) + to-delete))) + + (define (create-symlinks new-tree new-files-path) + ;; Create in directory NEW-TREE symlinks to the files under + ;; NEW-FILES-PATH, creating backups as needed. + (define (get-source-path path) + (readlink (string-append new-files-path "/" path))) + + (let ((to-create ((file-tree-traverse #t) new-tree))) + (map + (match-lambda + (('dir . ".") + (display + (G_ "New symlinks to home-environment will be created soon.\n")) + (format + #t (G_ "All conflicting files will go to ~a.\n\n") backup-dir)) + + (('dir . path) + (let ((target-path (get-target-path path))) + (when (and (file-exists? target-path) + (not (directory? target-path))) + (backup-file path)) + + (if (file-exists? target-path) + (format + #t (G_ "Skipping ~a (directory already exists)... done\n") + target-path) + (begin + (format #t (G_ "Creating ~a...") target-path) + (mkdir target-path) + (display (G_ " done\n")))))) + + (('file . path) + (when (file-exists? (get-target-path path)) + (backup-file path)) + (format #t (G_ "Symlinking ~a -> ~a...") + (get-target-path path) (get-source-path path)) + (symlink (get-source-path path) (get-target-path path)) + (display (G_ " done\n")))) + to-create))) - (let* ((config-home (or (getenv "XDG_CONFIG_HOME") - (string-append (getenv "HOME") "/.config"))) + #$%initialize-gettext - (he-path (string-append (getenv "HOME") "/.guix-home")) + (let* ((he-path (string-append (getenv "HOME") "/.guix-home")) (new-he-path (string-append he-path ".new")) (new-home (getenv "GUIX_NEW_HOME")) (old-home (getenv "GUIX_OLD_HOME")) @@ -103,141 +212,24 @@ appear only after all nested items already listed." ;; to make file-system-tree works it should be a directory. (new-files-dir-path (string-append new-files-path "/.")) - (home-path (getenv "HOME")) - (backup-dir (string-append home-path "/" - (number->string (current-time)) - "-guix-home-legacy-configs-backup")) - (old-tree (if old-home ((simplify-file-tree "") (file-system-tree (string-append old-home "/files/."))) #f)) (new-tree ((simplify-file-tree "") - (file-system-tree new-files-dir-path))) - - (get-source-path - (lambda (path) - (readlink (string-append new-files-path "/" path)))) - - (get-target-path - (lambda (path) - (string-append home-path "/." path))) - - (get-backup-path - (lambda (path) - (string-append backup-dir "/." path))) - - (directory? - (lambda (path) - (equal? (stat:type (stat path)) 'directory))) - - (empty-directory? - (lambda (dir) - (equal? (scandir dir) '("." "..")))) - - (symlink-to-store? - (lambda (path) - (and - (equal? (stat:type (lstat path)) 'symlink) - (store-file-name? (readlink path))))) - - (backup-file - (lambda (path) - (mkdir-p backup-dir) - (format #t (G_ "Backing up ~a...") (get-target-path path)) - (mkdir-p (dirname (get-backup-path path))) - (rename-file (get-target-path path) (get-backup-path path)) - (display (G_ " done\n")))) - - (cleanup-symlinks - (lambda () - (let ((to-delete ((file-tree-traverse #f) old-tree))) - (display - (G_ - "Cleaning up symlinks from previous home-environment.\n\n")) - (map - (match-lambda - (('dir . ".") - (display (G_ "Cleanup finished.\n\n"))) - - (('dir . path) - (if (and - (file-exists? (get-target-path path)) - (directory? (get-target-path path)) - (empty-directory? (get-target-path path))) - (begin - (format #t (G_ "Removing ~a...") - (get-target-path path)) - (rmdir (get-target-path path)) - (display (G_ " done\n"))) - (format - #t - (G_ "Skipping ~a (not an empty directory)... done\n") - (get-target-path path)))) - - (('file . path) - (when (file-exists? (get-target-path path)) - ;; DO NOT remove the file if it is no longer - ;; a symlink to the store, it will be backed - ;; up later during create-symlinks phase. - (if (symlink-to-store? (get-target-path path)) - (begin - (format #t (G_ "Removing ~a...") (get-target-path path)) - (delete-file (get-target-path path)) - (display (G_ " done\n"))) - (format - #t - (G_ "Skipping ~a (not a symlink to store)... done\n") - (get-target-path path)))))) - to-delete)))) - - (create-symlinks - (lambda () - (let ((to-create ((file-tree-traverse #t) new-tree))) - (map - (match-lambda - (('dir . ".") - (display - (G_ "New symlinks to home-environment will be created soon.\n")) - (format - #t (G_ "All conflicting files will go to ~a.\n\n") backup-dir)) - - (('dir . path) - (let ((target-path (get-target-path path))) - (when (and (file-exists? target-path) - (not (directory? target-path))) - (backup-file path)) - - (if (file-exists? target-path) - (format - #t (G_ "Skipping ~a (directory already exists)... done\n") - target-path) - (begin - (format #t (G_ "Creating ~a...") target-path) - (mkdir target-path) - (display (G_ " done\n")))))) - - (('file . path) - (when (file-exists? (get-target-path path)) - (backup-file path)) - (format #t (G_ "Symlinking ~a -> ~a...") - (get-target-path path) (get-source-path path)) - (symlink (get-source-path path) (get-target-path path)) - (display (G_ " done\n")))) - to-create))))) + (file-system-tree new-files-dir-path)))) (when old-tree - (cleanup-symlinks)) + (cleanup-symlinks old-tree)) - (create-symlinks) + (create-symlinks new-tree new-files-path) (symlink new-home new-he-path) (rename-file new-he-path he-path) (display (G_" done\nFinished updating symlinks.\n\n"))))))) - (define (update-symlinks-gexp _) #~(primitive-load #$(update-symlinks-script))) |