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06/16: home: symlink-manager: Move helper procedures as top-level define
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From: |
guix-commits |
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Subject: |
06/16: home: symlink-manager: Move helper procedures as top-level defines. |
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Date: |
Thu, 10 Mar 2022 05:43:53 -0500 (EST) |
civodul pushed a commit to branch master
in repository guix.
commit 7a8856f540675d479a4a99bd81d8e810a34f036f
Author: Ludovic Courtès <ludo@gnu.org>
AuthorDate: Fri Feb 18 16:58:27 2022 +0100
home: symlink-manager: Move helper procedures as top-level defines.
* gnu/home/services/symlink-manager.scm (update-symlinks-script): Remove
'config-home', which is unused. Move 'home-path', 'backup-dir',
'get-target-path', 'get-backup-path', 'directory?', 'empty-directory?',
'symlink-to-store?', and 'backup-file' to the top level. Move
'create-symlinks' and 'cleanup-symlinks' to the top level as well, and
add parameters. Adjust callers.
---
gnu/home/services/symlink-manager.scm | 240 ++++++++++++++++------------------
1 file 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)))
- branch master updated (cceb5344ae -> 2a55f99aff), guix-commits, 2022/03/10
- 03/16: gnu: gnome-sudoku: Add missing dependency on Python., guix-commits, 2022/03/10
- 04/16: gnu: gnome-sudoku: Remove input labels., guix-commits, 2022/03/10
- 05/16: home: symlink-manager: Clarify module imports., guix-commits, 2022/03/10
- 09/16: home: symlink-manager: Remove 'empty-directory?' and avoid TOCTTOU race., guix-commits, 2022/03/10
- 02/16: gnu: gnome-arcade: Update to 0.240., guix-commits, 2022/03/10
- 08/16: home: symlink-manager: Use 'file-is-directory?'., guix-commits, 2022/03/10
- 16/16: home: symlink-manager: Rename "path" to "file" where appropriate., guix-commits, 2022/03/10
- 07/16: home: symlink-manager: Use 'for-each' when used for effects., guix-commits, 2022/03/10
- 01/16: maint: 'assert-binaries-available' only checks ci.guix.gnu.org., guix-commits, 2022/03/10
- 06/16: home: symlink-manager: Move helper procedures as top-level defines.,
guix-commits <=
- 11/16: tests: Make sure 'guix home reconfigure' backs up files., guix-commits, 2022/03/10
- 13/16: tests: Check 'guix home reconfigure' for a second generation., guix-commits, 2022/03/10
- 12/16: tests: Simplify use of 'local-file' in 'tests/guix-home.sh'., guix-commits, 2022/03/10
- 14/16: home: symlink-manager: 'cleanup-symlinks' uses 'file-system-fold'., guix-commits, 2022/03/10
- 10/16: home: symlink-manager: Avoid extra 'lstat' call., guix-commits, 2022/03/10
- 15/16: home: symlink-manager: 'create-symlinks' uses 'file-system-fold'., guix-commits, 2022/03/10