summaryrefslogtreecommitdiff
path: root/guix
diff options
context:
space:
mode:
Diffstat (limited to 'guix')
-rw-r--r--guix/scripts/home.scm272
1 files changed, 247 insertions, 25 deletions
diff --git a/guix/scripts/home.scm b/guix/scripts/home.scm
index e95e4a90e4..1902562f60 100644
--- a/guix/scripts/home.scm
+++ b/guix/scripts/home.scm
@@ -24,11 +24,24 @@
#:use-module (gnu packages admin)
#:use-module ((gnu services) #:hide (delete))
#:use-module (gnu packages)
+ #:autoload (gnu packages base) (coreutils)
+ #:autoload (gnu packages bash) (bash)
+ #:autoload (gnu packages gnupg) (guile-gcrypt)
+ #:autoload (gnu packages shells) (fish gash zsh)
#:use-module (gnu home)
#:use-module (gnu home services)
#:autoload (gnu home services shepherd) (home-shepherd-service-type
home-shepherd-configuration-services
shepherd-service-requirement)
+ #:autoload (guix modules) (source-module-closure)
+ #:autoload (gnu build linux-container) (call-with-container %namespaces)
+ #:autoload (gnu system linux-container) (eval/container)
+ #:autoload (gnu system file-systems) (file-system-mapping
+ file-system-mapping-source
+ file-system-mapping->bind-mount
+ specification->file-system-mapping
+ %network-file-mappings)
+ #:autoload (guix self) (make-config.scm)
#:use-module (guix channels)
#:use-module (guix derivations)
#:use-module (guix ui)
@@ -55,6 +68,7 @@
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-35)
#:use-module (srfi srfi-37)
+ #:use-module (srfi srfi-71)
#:use-module (ice-9 match)
#:export (guix-home))
@@ -106,6 +120,16 @@ Some ACTIONS support additional ARGS.\n"))
(display (G_ "
--allow-downgrades for 'reconfigure', allow downgrades to earlier
channel revisions"))
+ (newline)
+ (display (G_ "
+ -N, --network allow containers to access the network"))
+ (display (G_ "
+ --share=SPEC for containers, share writable host file system
+ according to SPEC"))
+ (display (G_ "
+ --expose=SPEC for containers, expose read-only host file system
+ according to SPEC"))
+ (newline)
(display (G_ "
-v, --verbosity=LEVEL use the given verbosity LEVEL"))
(display (G_ "
@@ -154,6 +178,21 @@ Some ACTIONS support additional ARGS.\n"))
(lambda (opt name arg result)
(alist-cons 'graph-backend arg result)))
+ ;; Container options.
+ (option '(#\N "network") #f #f
+ (lambda (opt name arg result)
+ (alist-cons 'network? #t result)))
+ (option '("share") #t #f
+ (lambda (opt name arg result)
+ (alist-cons 'file-system-mapping
+ (specification->file-system-mapping arg #t)
+ result)))
+ (option '("expose") #t #f
+ (lambda (opt name arg result)
+ (alist-cons 'file-system-mapping
+ (specification->file-system-mapping arg #f)
+ result)))
+
%standard-build-options))
(define %default-options
@@ -170,6 +209,146 @@ Some ACTIONS support additional ARGS.\n"))
;;;
+;;; Container.
+;;;
+
+(define not-config?
+ ;; Select (guix …) and (gnu …) modules, except (guix config).
+ (match-lambda
+ (('guix 'config) #f)
+ (('guix _ ...) #t)
+ (('gnu _ ...) #t)
+ (_ #f)))
+
+(define (user-shell)
+ (match (and=> (or (getenv "SHELL")
+ (passwd:shell (getpwuid (getuid))))
+ basename)
+ ("zsh" (file-append zsh "/bin/zsh"))
+ ("fish" (file-append fish "/bin/fish"))
+ ("gash" (file-append gash "/bin/gash"))
+ (_ (file-append bash "/bin/bash"))))
+
+(define %default-system-profile
+ ;; The "system" profile available when running 'guix home container'. The
+ ;; activation script currently expects to run "env -0" (XXX), so provide
+ ;; Coreutils by default.
+ (delay (profile
+ (name "home-system-profile")
+ (content (packages->manifest (list coreutils))))))
+
+(define* (spawn-home-container home
+ #:key
+ network?
+ (command '())
+ (mappings '())
+ (system-profile
+ (force %default-system-profile)))
+ "Spawn a login shell within a container running HOME, a home environment.
+When COMMAND is a non-empty list, execute it in the container and exit
+immediately. Return the exit status of the process in the container."
+ (define passwd (getpwuid (getuid)))
+ (define home-directory (or (getenv "HOME") (passwd:dir passwd)))
+ (define host (gethostname))
+ (define uid 1000)
+ (define gid 1000)
+ (define user-name (passwd:name passwd))
+ (define user-real-name (passwd:gecos passwd))
+
+ (define (optional-mapping mapping)
+ (and (file-exists? (file-system-mapping-source mapping))
+ mapping))
+
+ (define network-mappings
+ (if network?
+ (filter-map optional-mapping %network-file-mappings)
+ '()))
+
+ (eval/container
+ (with-extensions (list guile-gcrypt)
+ (with-imported-modules `(((guix config) => ,(make-config.scm))
+ ,@(source-module-closure
+ '((gnu build accounts)
+ (guix profiles)
+ (guix build utils)
+ (guix build syscalls))
+ #:select? not-config?))
+ #~(begin
+ (use-modules (guix build utils)
+ (gnu build accounts)
+ ((guix build syscalls)
+ #:select (set-network-interface-up)))
+
+ (define shell
+ #$(user-shell))
+
+ (define term
+ #$(getenv "TERM"))
+
+ (define passwd
+ (password-entry
+ (name #$user-name)
+ (real-name #$user-real-name)
+ (uid #$uid) (gid #$gid) (shell shell)
+ (directory #$home-directory)))
+
+ (define groups
+ (list (group-entry (name "users") (gid #$gid))
+ (group-entry (gid 65534) ;the overflow GID
+ (name "overflow"))))
+
+ ;; (guix profiles) loads (guix utils), which calls 'getpw' from the
+ ;; top level. Thus, arrange so that it's loaded after /etc/passwd
+ ;; has been created.
+ (module-autoload! (current-module)
+ '(guix profiles) '(load-profile))
+
+ ;; Create /etc/passwd for applications that need it, such as mcron.
+ (mkdir-p "/etc")
+ (write-passwd (list passwd))
+ (write-group groups)
+
+ (unless #$network?
+ ;; When isolated from the network, provide a minimal /etc/hosts
+ ;; to resolve "localhost".
+ (call-with-output-file "/etc/hosts"
+ (lambda (port)
+ (display "127.0.0.1 localhost\n" port)
+ (chmod port #o444))))
+
+ ;; Set PATH for things that the activation script might expect, such
+ ;; as "env".
+ (load-profile #$system-profile)
+
+ (mkdir-p #$home-directory)
+ (setenv "HOME" #$home-directory)
+ (setenv "GUIX_NEW_HOME" #$home)
+ (primitive-load (string-append #$home "/activate"))
+ (setenv "GUIX_NEW_HOME" #f)
+
+ (when term
+ ;; Preserve TERM for proper interactive use.
+ (setenv "TERM" term))
+
+ (chdir #$home-directory)
+
+ ;; Invoke SHELL with argv[0] starting with "-": that's how shells
+ ;; figure out that they are login shells!
+ (execl shell (string-append "-" (basename shell))
+ #$@(match command
+ (() #~())
+ ((_ ...)
+ #~("-c" #$(string-join command))))))))
+
+ #:namespaces (if network?
+ (delq 'net %namespaces) ; share host network
+ %namespaces)
+ #:mappings (append network-mappings mappings)
+ #:guest-uid uid
+ #:guest-gid gid))
+
+
+;;;
;;; Actions.
;;;
@@ -208,7 +387,12 @@ Some ACTIONS support additional ARGS.\n"))
derivations-only?
use-substitutes?
(graph-backend "graphviz")
- (validate-reconfigure ensure-forward-reconfigure))
+ (validate-reconfigure ensure-forward-reconfigure)
+
+ ;; Container options.
+ (file-system-mappings '())
+ (container-command '())
+ network?)
"Perform ACTION for home environment. "
(define println
@@ -237,24 +421,37 @@ Some ACTIONS support additional ARGS.\n"))
(he-out-path -> (derivation->output-path he-drv)))
(if (or dry-run? derivations-only?)
(return #f)
- (begin
- (for-each (compose println derivation->output-path) drvs)
-
- (case action
- ((reconfigure)
- (let* ((number (generation-number %guix-home))
- (generation (generation-file-name
- %guix-home (+ 1 number))))
-
- (switch-symlinks generation he-out-path)
- (switch-symlinks %guix-home generation)
- (setenv "GUIX_NEW_HOME" he-out-path)
- (primitive-load (string-append he-out-path "/activate"))
- (setenv "GUIX_NEW_HOME" #f)
- (return he-out-path)))
- (else
- (newline)
- (return he-out-path)))))))))
+ (case action
+ ((reconfigure)
+ (let* ((number (generation-number %guix-home))
+ (generation (generation-file-name
+ %guix-home (+ 1 number))))
+
+ (switch-symlinks generation he-out-path)
+ (switch-symlinks %guix-home generation)
+ (setenv "GUIX_NEW_HOME" he-out-path)
+ (primitive-load (string-append he-out-path "/activate"))
+ (setenv "GUIX_NEW_HOME" #f)
+ (return he-out-path)))
+ ((container)
+ (mlet %store-monad ((status (spawn-home-container
+ he
+ #:network? network?
+ #:mappings file-system-mappings
+ #:command
+ container-command)))
+ (match (status:exit-val status)
+ (0 (return #t))
+ ((? integer? n) (return (exit n)))
+ (#f
+ (if (status:term-sig status)
+ (leave (G_ "process terminated with signal ~a~%")
+ (status:term-sig status))
+ (leave (G_ "process stopped with signal ~a~%")
+ (status:stop-sig status)))))))
+ (else
+ (for-each (compose println derivation->output-path) drvs)
+ (return he-out-path))))))))
(define (process-action action args opts)
"Process ACTION, a sub-command, with the arguments are listed in ARGS.
@@ -293,6 +490,10 @@ resulting from command-line parsing."
(else
(leave (G_ "no configuration specified~%")))))))
+ (mappings (filter-map (match-lambda
+ (('file-system-mapping . mapping) mapping)
+ (_ #f))
+ opts))
(dry? (assoc-ref opts 'dry-run?)))
(with-store store
@@ -315,7 +516,11 @@ resulting from command-line parsing."
#:validate-reconfigure
(assoc-ref opts 'validate-reconfigure)
#:graph-backend
- (assoc-ref opts 'graph-backend))))))
+ (assoc-ref opts 'graph-backend)
+ #:network? (assoc-ref opts 'network?)
+ #:file-system-mappings mappings
+ #:container-command
+ (or (assoc-ref opts 'container-command) '()))))))
(warn-about-disk-space)))
@@ -404,7 +609,7 @@ deploy the home environment described by these files.\n")
list-generations describe
delete-generations roll-back
switch-generation search
- import)
+ import container)
(alist-cons 'action action result))
(else (leave (G_ "~a: unknown action~%") action))))))
@@ -442,11 +647,28 @@ deploy the home environment described by these files.\n")
(fail))))
args))
+ (define (parse-args args)
+ ;; Parse the list of command line arguments ARGS.
+
+ ;; The '--' token is used to separate the command to run from the rest of
+ ;; the operands.
+ (let* ((args rest (break (cut string=? "--" <>) args))
+ (opts (parse-command-line args %options (list %default-options)
+ #:argument-handler
+ parse-sub-command)))
+ (match rest
+ (() opts)
+ (("--") opts)
+ (("--" command ...)
+ (match (assoc-ref opts 'action)
+ ('container
+ (alist-cons 'container-command command opts))
+ (_
+ (leave (G_ "~a: extraneous command~%")
+ (string-join command))))))))
+
(with-error-handling
- (let* ((opts (parse-command-line args %options
- (list %default-options)
- #:argument-handler
- parse-sub-command))
+ (let* ((opts (parse-args args))
(args (option-arguments opts))
(command (assoc-ref opts 'action)))
(parameterize ((%graft? (assoc-ref opts 'graft?)))
generated by cgit v1.2.3 (git 2.46.2) at 2024-12-27 22:19:47 +0000