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guix package: Add `--install-from-expression'.

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* guix/scripts/package.scm (read/eval-package-expression): New
  procedure.
  (show-help): Add `-e'.
  (%options): Likewise.
  (guix-package)[process-actions]: Handle ('install . p) pairs, where P
  is a package.
* tests/guix-package.sh: Add `boot_make_drv'.  Use `-i $boot_make_drv'
  once, and then use `-e $boot_make'.
* doc/guix.texi (Invoking guix package): Document `-e'.
This commit is contained in:
Ludovic Courtès 2013-03-01 21:12:32 +01:00
parent 431a35518f
commit 5d4b411f8a
3 changed files with 67 additions and 5 deletions
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13
doc/guix.texi
View file

@ -514,6 +514,19 @@ Thus, when installing MPC, the MPFR and GMP libraries also get installed
in the profile; removing MPC also removes MPFR and GMP---unless they had
also been explicitly installed independently.
@item --install-from-expression=@var{exp}
@itemx -e @var{exp}
Install the package @var{exp} evaluates to.
@var{exp} must be a Scheme expression that evaluates to a
@code{<package>} object. This option is notably useful to disambiguate
between same-named variants of a package, with expressions such as
@code{(@@ (gnu packages base) guile-final)}.
Note that this option installs the first output of the specified
package, which may be insufficient when needing a specific output of a
multiple-output package.
@item --remove=@var{package}
@itemx -r @var{package}
Remove @var{package}.

44
guix/scripts/package.scm
View file

@ -266,6 +266,26 @@ (define (input->name+path input)
(assoc-ref (derivation-outputs drv) sub-drv))))
`(,name ,out))))))
(define (read/eval-package-expression str)
"Read and evaluate STR and return the package it refers to, or exit an
error."
(let ((exp (catch #t
(lambda ()
(call-with-input-string str read))
(lambda args
(leave (_ "failed to read expression ~s: ~s~%")
str args)))))
(let ((p (catch #t
(lambda ()
(eval exp the-scm-module))
(lambda args
(leave (_ "failed to evaluate expression `~a': ~s~%")
exp args)))))
(if (package? p)
p
(leave (_ "expression `~s' does not evaluate to a package~%")
exp)))))
;;;
;;; Command-line options.
@ -281,6 +301,9 @@ (define (show-help)
(display (_ "
-i, --install=PACKAGE install PACKAGE"))
(display (_ "
-e, --install-from-expression=EXP
install the package EXP evaluates to"))
(display (_ "
-r, --remove=PACKAGE remove PACKAGE"))
(display (_ "
-u, --upgrade=REGEXP upgrade all the installed packages matching REGEXP"))
@ -325,6 +348,10 @@ (define %options
(option '(#\i "install") #t #f
(lambda (opt name arg result)
(alist-cons 'install arg result)))
(option '(#\e "install-from-expression") #t #f
(lambda (opt name arg result)
(alist-cons 'install (read/eval-package-expression arg)
result)))
(option '(#\r "remove") #t #f
(lambda (opt name arg result)
(alist-cons 'remove arg result)))
@ -490,6 +517,19 @@ (define (same? d1 d2)
(delete-duplicates (map input->name+path deps) same?))
(define (package->tuple p)
(let ((path (package-derivation (%store) p))
(deps (package-transitive-propagated-inputs p)))
`(,(package-name p)
,(package-version p)
;; When given a package via `-e', install the first of its
;; outputs (XXX).
,(car (package-outputs p))
,path
,(canonicalize-deps deps))))
;; First roll back if asked to.
(if (and (assoc-ref opts 'roll-back?) (not dry-run?))
(begin
@ -515,6 +555,8 @@ (define (same? d1 d2)
(install (append
upgrade
(filter-map (match-lambda
(('install . (? package? p))
#f)
(('install . (? store-path?))
#f)
(('install . package)
@ -530,6 +572,8 @@ (define (same? d1 d2)
install))
(install* (append
(filter-map (match-lambda
(('install . (? package? p))
(package->tuple p))
(('install . (? store-path? path))
(let-values (((name version)
(package-name->name+version

15
tests/guix-package.sh
View file

@ -33,6 +33,10 @@ rm -f "$profile"
trap 'rm "$profile" "$profile-"[0-9]* ; rm -rf t-home-'"$$" EXIT
# Use `-e' with a non-package expression.
if guix package --bootstrap -e +;
then false; else true; fi
guix package --bootstrap -p "$profile" -i guile-bootstrap
test -L "$profile" && test -L "$profile-1-link"
test -f "$profile/bin/guile"
@ -46,8 +50,9 @@ test -f "$profile/bin/guile"
# Check whether we have network access.
if guile -c '(getaddrinfo "www.gnu.org" "80" AI_NUMERICSERV)' 2> /dev/null
then
boot_make="`guix build -e '(@@ (gnu packages base) gnu-make-boot0)'`"
guix package --bootstrap -p "$profile" -i "$boot_make"
boot_make="(@@ (gnu packages base) gnu-make-boot0)"
boot_make_drv="`guix build -e "$boot_make"`"
guix package --bootstrap -p "$profile" -i "$boot_make_drv"
test -L "$profile-2-link"
test -f "$profile/bin/make" && test -f "$profile/bin/guile"
@ -94,7 +99,7 @@ then
done
# Reinstall after roll-back to the empty profile.
guix package --bootstrap -p "$profile" -i "$boot_make"
guix package --bootstrap -p "$profile" -e "$boot_make"
test "`readlink_base "$profile"`" = "$profile-1-link"
test -x "$profile/bin/guile" && ! test -x "$profile/bin/make"
@ -104,7 +109,7 @@ then
test -x "$profile/bin/guile" && ! test -x "$profile/bin/make"
# Install Make.
guix package --bootstrap -p "$profile" -i "$boot_make"
guix package --bootstrap -p "$profile" -e "$boot_make"
test "`readlink_base "$profile"`" = "$profile-2-link"
test -x "$profile/bin/guile" && test -x "$profile/bin/make"
@ -145,7 +150,7 @@ test -f "$HOME/.guix-profile/bin/guile"
if guile -c '(getaddrinfo "www.gnu.org" "80" AI_NUMERICSERV)' 2> /dev/null
then
guix package --bootstrap -i "$boot_make"
guix package --bootstrap -e "$boot_make"
test -f "$HOME/.guix-profile/bin/make"
first_environment="`cd $HOME/.guix-profile ; pwd`"