diff options
Diffstat (limited to 'gnu/home/services/symlink-manager.scm')
| -rw-r--r-- | gnu/home/services/symlink-manager.scm | 128 |
1 files changed, 43 insertions, 85 deletions
diff --git a/gnu/home/services/symlink-manager.scm b/gnu/home/services/symlink-manager.scm index 4f827c0360..16e2e7b772 100644 --- a/gnu/home/services/symlink-manager.scm +++ b/gnu/home/services/symlink-manager.scm @@ -43,52 +43,11 @@ (guix i18n))) #~(begin (use-modules (ice-9 ftw) - (ice-9 curried-definitions) (ice-9 match) (srfi srfi-1) (guix i18n) (guix build utils)) - (define ((simplify-file-tree parent) file) - "Convert the result produced by `file-system-tree' to less -verbose and more suitable for further processing format. - -Extract dir/file info from stat and compose a relative path to the -root of the file tree. - -Sample output: - -((dir . \".\") - ((dir . \"config\") - ((dir . \"config/fontconfig\") - (file . \"config/fontconfig/fonts.conf\")) - ((dir . \"config/isync\") - (file . \"config/isync/mbsyncrc\")))) -" - (match file - ((name stat) `(file . ,(string-append parent name))) - ((name stat children ...) - (cons `(dir . ,(string-append parent name)) - (map (simplify-file-tree - (if (equal? name ".") - "" - (string-append parent name "/"))) - children))))) - - (define ((file-tree-traverse preordering) node) - "Traverses the file tree in different orders, depending on PREORDERING. - -if PREORDERING is @code{#t} resulting list will contain directories -before files located in those directories, otherwise directory will -appear only after all nested items already listed." - (let ((prepend (lambda (a b) (append b a)))) - (match node - (('file . path) (list node)) - ((('dir . path) . rest) - ((if preordering append prepend) - (list (cons 'dir path)) - (append-map (file-tree-traverse preordering) rest)))))) - (define home-path (getenv "HOME")) @@ -176,64 +135,63 @@ appear only after all nested items already listed." (display (G_ "Cleanup finished.\n\n"))) - (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))) + (define (create-symlinks home-generation) + ;; Create in $HOME symlinks for the files in HOME-GENERATION. + (define config-file-directory + ;; Note: Trailing slash is needed because "files" is a symlink. + (string-append home-generation "/files/")) - (let ((to-create ((file-tree-traverse #t) new-tree))) - (for-each - (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)) + (define (strip file) + (string-drop file + (+ 1 (string-length config-file-directory)))) - (('dir . path) - (let ((target-path (get-target-path path))) - (when (and (file-exists? target-path) - (not (file-is-directory? target-path))) - (backup-file path)) + (define (get-source-path path) + (readlink (string-append config-file-directory 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-system-fold + (const #t) ;enter? + (lambda (file stat result) ;leaf + (let ((source (get-source-path (strip file))) + (target (get-target-path (strip file)))) + (when (file-exists? target) + (backup-file (strip file))) + (format #t (G_ "Symlinking ~a -> ~a...") + target source) + (symlink source target) + (display (G_ " done\n")))) + (lambda (directory stat result) ;down + (unless (string=? directory config-file-directory) + (let ((target (get-target-path (strip directory)))) + (when (and (file-exists? target) + (not (file-is-directory? target))) + (backup-file (strip directory))) - (('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))) + (catch 'system-error + (lambda () + (mkdir target)) + (lambda args + (let ((errno (system-error-errno args))) + (unless (= EEXIST errno) + (format #t (G_ "failed to create directory ~a: ~s~%") + target (strerror errno)) + (apply throw args)))))))) + (const #t) ;up + (const #t) ;skip + (const #t) ;error + #t ;init + config-file-directory)) #$%initialize-gettext (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")) - - (new-files-path (string-append new-home "/files")) - ;; Trailing dot is required, because files itself is symlink and - ;; to make file-system-tree works it should be a directory. - (new-files-dir-path (string-append new-files-path "/.")) - - (new-tree ((simplify-file-tree "") - (file-system-tree new-files-dir-path)))) + (old-home (getenv "GUIX_OLD_HOME"))) (when old-home (cleanup-symlinks old-home)) - (create-symlinks new-tree new-files-path) + (create-symlinks new-home) (symlink new-home new-he-path) (rename-file new-he-path he-path) |