diff options
Diffstat (limited to 'gnu/system/file-systems.scm')
| -rw-r--r-- | gnu/system/file-systems.scm | 108 |
1 files changed, 96 insertions, 12 deletions
diff --git a/gnu/system/file-systems.scm b/gnu/system/file-systems.scm index 93289dbd5d..2b5948256a 100644 --- a/gnu/system/file-systems.scm +++ b/gnu/system/file-systems.scm @@ -20,6 +20,8 @@ #:use-module (ice-9 match) #:use-module (rnrs bytevectors) #:use-module (srfi srfi-1) + #:use-module (srfi srfi-9) + #:use-module (srfi srfi-9 gnu) #:use-module (guix records) #:use-module (gnu system uuid) #:re-export (uuid ;backward compatibility @@ -28,7 +30,7 @@ #:export (file-system file-system? file-system-device - file-system-title + file-system-title ;deprecated file-system-mount-point file-system-type file-system-needed-for-boot? @@ -42,6 +44,10 @@ file-system-type-predicate + file-system-label + file-system-label? + file-system-label->string + file-system->spec spec->file-system specification->file-system-mapping @@ -82,12 +88,10 @@ ;;; Code: ;; File system declaration. -(define-record-type* <file-system> file-system +(define-record-type* <file-system> %file-system make-file-system file-system? - (device file-system-device) ; string - (title file-system-title ; 'device | 'label | 'uuid - (default 'device)) + (device file-system-device) ; string | <uuid> | <file-system-label> (mount-point file-system-mount-point) ; string (type file-system-type) ; string (flags file-system-flags ; list of symbols @@ -108,6 +112,83 @@ (default (current-source-location)) (innate))) +;; A file system label for use in the 'device' field. +(define-record-type <file-system-label> + (file-system-label label) + file-system-label? + (label file-system-label->string)) + +(set-record-type-printer! <file-system-label> + (lambda (obj port) + (format port "#<file-system-label ~s>" + (file-system-label->string obj)))) + +(define-syntax report-deprecation + (lambda (s) + "Report the use of the now-deprecated 'title' field." + (syntax-case s () + ((_ field) + (let* ((source (syntax-source #'field)) + (file (and source (assq-ref source 'filename))) + (line (and source + (and=> (assq-ref source 'line) 1+))) + (column (and source (assq-ref source 'column)))) + (format (current-error-port) + "~a:~a:~a: warning: 'title' field is deprecated~%" + file line column) + #t))))) + +;; Helper for 'process-file-system-declaration'. +(define-syntax device-expression + (syntax-rules (quote label uuid device) + ((_ (quote label) dev) + (file-system-label dev)) + ((_ (quote uuid) dev) + (if (uuid? dev) dev (uuid dev))) + ((_ (quote device) dev) + dev) + ((_ title dev) + (case title + ((label) (file-system-label dev)) + ((uuid) (uuid dev)) + (else dev))))) + +;; Helper to interpret the now-deprecated 'title' field. Detect forms like +;; (title 'label), remove them, and adjust the 'device' field accordingly. +;; TODO: Remove this once 'title' has been deprecated long enough. +(define-syntax process-file-system-declaration + (syntax-rules (device title) + ((_ () (rest ...) #f #f) ;no 'title' and no 'device' field + (%file-system rest ...)) + ((_ () (rest ...) dev #f) ;no 'title' field + (%file-system rest ... (device dev))) + ((_ () (rest ...) dev titl) ;got a 'title' field + (%file-system rest ... + (device (device-expression titl dev)))) + ((_ ((title titl) rest ...) (previous ...) dev _) + (begin + (report-deprecation (title titl)) + (process-file-system-declaration (rest ...) + (previous ...) + dev titl))) + ((_ ((device dev) rest ...) (previous ...) _ titl) + (process-file-system-declaration (rest ...) + (previous ...) + dev titl)) + ((_ (field rest ...) (previous ...) dev titl) + (process-file-system-declaration (rest ...) + (previous ... field) + dev titl)))) + +(define-syntax-rule (file-system fields ...) + (process-file-system-declaration (fields ...) () #f #f)) + +(define (file-system-title fs) ;deprecated + (match (file-system-device fs) + ((? file-system-label?) 'label) + ((? uuid?) 'uuid) + ((? string?) 'device))) + ;; Note: This module is used both on the build side and on the host side. ;; Arrange not to pull (guix store) and (guix config) because the latter ;; differs from user to user. @@ -160,23 +241,26 @@ store--e.g., if FS is the root file system." "Return a list corresponding to file-system FS that can be passed to the initrd code." (match fs - (($ <file-system> device title mount-point type flags options _ _ check?) - (list (if (uuid? device) - `(uuid ,(uuid-type device) ,(uuid-bytevector device)) - device) - title mount-point type flags options check?)))) + (($ <file-system> device mount-point type flags options _ _ check?) + (list (cond ((uuid? device) + `(uuid ,(uuid-type device) ,(uuid-bytevector device))) + ((file-system-label? device) + `(file-system-label ,(file-system-label->string device))) + (else device)) + mount-point type flags options check?)))) (define (spec->file-system sexp) "Deserialize SEXP, a list, to the corresponding <file-system> object." (match sexp - ((device title mount-point type flags options check?) + ((device mount-point type flags options check?) (file-system (device (match device (('uuid (? symbol? type) (? bytevector? bv)) (bytevector->uuid bv type)) + (('file-system-label (? string? label)) + (file-system-label label)) (_ device))) - (title title) (mount-point mount-point) (type type) (flags flags) (options options) (check? check?))))) |