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profiles: Add 'load-profile'.
* guix/profiles.scm (%precious-variables): New variable.
(purify-environment, load-profile): New procedures.
* guix/scripts/environment.scm (%precious-variables)
(purify-environment, create-environment): Remove.
(launch-environment): Call 'load-profile' instead of 'create-environment'.
* tests/profiles.scm ("load-profile"): New test.
This commit is contained in:
Ludovic Courtès
parent
c5b1b48f09
commit
ee61777a32
3 changed files with 76 additions and 43 deletions
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@ -11,6 +11,7 @@
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;;; Copyright © 2019 Kyle Meyer <kyle@kyleam.com>
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;;; Copyright © 2019 Mathieu Othacehe <m.othacehe@gmail.com>
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;;; Copyright © 2020 Danny Milosavljevic <dannym@scratchpost.org>
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;;; Copyright © 2014 David Thompson <davet@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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@ -54,6 +55,7 @@ (define-module (guix profiles)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-34)
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#:use-module (srfi srfi-35)
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#:autoload (srfi srfi-98) (get-environment-variables)
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#:export (&profile-error
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profile-error?
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profile-error-profile
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@ -127,6 +129,7 @@ (define-module (guix profiles)
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%default-profile-hooks
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profile-derivation
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profile-search-paths
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load-profile
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profile
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profile?
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@ -1916,6 +1919,44 @@ (define* (profile-search-paths profile
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(evaluate-search-paths (manifest-search-paths manifest)
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(list profile) getenv))
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(define %precious-variables
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;; Environment variables in the default 'load-profile' white list.
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'("HOME" "USER" "LOGNAME" "DISPLAY" "TERM" "TZ" "PAGER"))
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(define (purify-environment white-list white-list-regexps)
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"Unset all environment variables except those that match the regexps in
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WHITE-LIST-REGEXPS and those listed in WHITE-LIST."
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(for-each unsetenv
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(remove (lambda (variable)
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(or (member variable white-list)
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(find (cut regexp-exec <> variable)
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white-list-regexps)))
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(match (get-environment-variables)
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(((names . _) ...)
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names)))))
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(define* (load-profile profile
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#:optional (manifest (profile-manifest profile))
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#:key pure? (white-list-regexps '())
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(white-list %precious-variables))
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"Set the environment variables specified by MANIFEST for PROFILE. When
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PURE? is #t, unset the variables in the current environment except those that
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match the regexps in WHITE-LIST-REGEXPS and those listed in WHITE-LIST.
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Otherwise, augment existing environment variables with additional search
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paths."
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(when pure?
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(purify-environment white-list white-list-regexps))
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(for-each (match-lambda
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((($ <search-path-specification> variable _ separator) . value)
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(let ((current (getenv variable)))
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(setenv variable
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(if (and current (not pure?))
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(if separator
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(string-append value separator current)
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value)
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value)))))
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(profile-search-paths profile manifest)))
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(define (profile-regexp profile)
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"Return a regular expression that matches PROFILE's name and number."
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(make-regexp (string-append "^" (regexp-quote (basename profile))
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@ -52,50 +52,9 @@ (define-module (guix scripts environment)
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#:export (assert-container-features
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guix-environment))
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;; Protect some env vars from purification. Borrowed from nix-shell.
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(define %precious-variables
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'("HOME" "USER" "LOGNAME" "DISPLAY" "TERM" "TZ" "PAGER"))
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(define %default-shell
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(or (getenv "SHELL") "/bin/sh"))
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(define (purify-environment white-list)
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"Unset all environment variables except those that match the regexps in
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WHITE-LIST and those listed in %PRECIOUS-VARIABLES. A small number of
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variables such as 'HOME' and 'USER' are left untouched."
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(for-each unsetenv
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(remove (lambda (variable)
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(or (member variable %precious-variables)
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(find (cut regexp-exec <> variable)
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white-list)))
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(match (get-environment-variables)
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(((names . _) ...)
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names)))))
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(define* (create-environment profile manifest
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#:key pure? (white-list '()))
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"Set the environment variables specified by MANIFEST for PROFILE. When
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PURE? is #t, unset the variables in the current environment except those that
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match the regexps in WHITE-LIST. Otherwise, augment existing environment
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variables with additional search paths."
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(when pure?
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(purify-environment white-list))
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(for-each (match-lambda
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((($ <search-path-specification> variable _ separator) . value)
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(let ((current (getenv variable)))
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(setenv variable
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(if (and current (not pure?))
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(if separator
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(string-append value separator current)
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value)
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value)))))
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(profile-search-paths profile manifest))
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;; Give users a way to know that they're in 'guix environment', so they can
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;; adjust 'PS1' accordingly, for instance. Set it to PROFILE so users can
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;; conveniently access its contents.
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(setenv "GUIX_ENVIRONMENT" profile))
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(define* (show-search-paths profile manifest #:key pure?)
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"Display the search paths of MANIFEST applied to PROFILE. When PURE? is #t,
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do not augment existing environment variables with additional search paths."
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@ -425,8 +384,14 @@ (define* (launch-environment command profile manifest
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;; Properly handle SIGINT, so pressing C-c in an interactive terminal
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;; application works.
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(sigaction SIGINT SIG_DFL)
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(create-environment profile manifest
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#:pure? pure? #:white-list white-list)
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(load-profile profile manifest
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#:pure? pure? #:white-list-regexps white-list)
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;; Give users a way to know that they're in 'guix environment', so they can
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;; adjust 'PS1' accordingly, for instance. Set it to PROFILE so users can
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;; conveniently access its contents.
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(setenv "GUIX_ENVIRONMENT" profile)
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(match command
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((program . args)
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(apply execlp program program args))))
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@ -279,6 +279,33 @@ (define transform1
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(string=? (dirname (readlink bindir))
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(derivation->output-path guile))))))
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(test-assertm "load-profile"
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(mlet* %store-monad
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((entry -> (package->manifest-entry %bootstrap-guile))
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(guile (package->derivation %bootstrap-guile))
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(drv (profile-derivation (manifest (list entry))
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#:hooks '()
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#:locales? #f))
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(profile -> (derivation->output-path drv))
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(bindir -> (string-append profile "/bin"))
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(_ (built-derivations (list drv))))
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(define-syntax-rule (with-environment-excursion exp ...)
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(let ((env (environ)))
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(dynamic-wind
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(const #t)
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(lambda () exp ...)
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(lambda () (environ env)))))
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(return (and (with-environment-excursion
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(load-profile profile)
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(and (string-prefix? (string-append bindir ":")
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(getenv "PATH"))
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(getenv "GUILE_LOAD_PATH")))
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(with-environment-excursion
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(load-profile profile #:pure? #t #:white-list '())
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(equal? (list (string-append "PATH=" bindir))
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(environ)))))))
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(test-assertm "<profile>"
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(mlet* %store-monad
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((entry -> (package->manifest-entry %bootstrap-guile))
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