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authorDavid Thompson <dthompson2@worcester.edu>2015-10-09 12:11:24 -0400
committerDavid Thompson <dthompson2@worcester.edu>2015-10-09 12:17:01 -0400
commit1de2fe95e017c42aacbaa34f5dab8d48249cc064 (patch)
tree12ee4d22703352afcf478f581b4b2cfafc8a8b6e
parentbbd00d2012833c6419a62f6490cbef3e896b1e11 (diff)
downloadguix-1de2fe95e017c42aacbaa34f5dab8d48249cc064.tar.gz
guix-1de2fe95e017c42aacbaa34f5dab8d48249cc064.zip
scripts: environment: Use system* instead of system.
This allows for direct program invokation without needing a shell to act as a command interpreter. * guix/scripts/environment.scm (%default-shell): New variable. (show-help): Adjust description. Remove '--exec' reference. (%default-options): Use '%default-shell'. (%options): Adjust '--exec' to run command via the default shell. (parse-args): New procedure. (guix-environment): Use 'parse-args'. Use 'system*' instead of 'system'. * tests/guix-environment.sh: Add test for '--' command invokation. * doc/guix.texi ("Invoking guix environment"): Use new syntax. Remove '--exec' documentation.
-rw-r--r--doc/guix.texi16
-rw-r--r--guix/scripts/environment.scm40
-rw-r--r--tests/guix-environment.sh12
3 files changed, 43 insertions, 25 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 6da7281566..39b76c7bf6 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -4538,11 +4538,12 @@ and Emacs are available:
guix environment guile emacs
@end example
-Sometimes an interactive shell session is not desired. The
-@code{--exec} option can be used to specify the command to run instead.
+Sometimes an interactive shell session is not desired. An arbitrary
+command may be invoked by placing the @code{--} token to separate the
+command from the rest of the arguments:
@example
-guix environment guile --exec=make
+guix environment guile -- make -j4
@end example
In other situations, it is more convenient to specify the list of
@@ -4551,7 +4552,7 @@ runs @command{python} from an environment containing Python@tie{}2.7 and
NumPy:
@example
-guix environment --ad-hoc python2-numpy python-2.7 -E python
+guix environment --ad-hoc python2-numpy python-2.7 -- python
@end example
The available options are summarized below.
@@ -4582,11 +4583,6 @@ As an example, @var{file} might contain a definition like this
@verbatiminclude environment-gdb.scm
@end example
-
-@item --exec=@var{command}
-@item -E @var{command}
-Execute @var{command} in the new environment.
-
@item --ad-hoc
Include all specified packages in the resulting environment, as if an
@i{ad hoc} package were defined with them as inputs. This option is
@@ -4596,7 +4592,7 @@ package expression to contain the desired inputs.
For instance, the command:
@example
-guix environment --ad-hoc guile guile-sdl -E guile
+guix environment --ad-hoc guile guile-sdl -- guile
@end example
runs @command{guile} in an environment where Guile and Guile-SDL are
diff --git a/guix/scripts/environment.scm b/guix/scripts/environment.scm
index 7aa52e8a8a..2408420e18 100644
--- a/guix/scripts/environment.scm
+++ b/guix/scripts/environment.scm
@@ -57,6 +57,9 @@ OUTPUT) tuples."
(define %precious-variables
'("HOME" "USER" "LOGNAME" "DISPLAY" "TERM" "TZ" "PAGER"))
+(define %default-shell
+ (or (getenv "SHELL") "/bin/sh"))
+
(define (purify-environment)
"Unset almost all environment variables. A small number of variables such
as 'HOME' and 'USER' are left untouched."
@@ -103,9 +106,9 @@ existing environment variables with additional search paths."
,@(package-transitive-propagated-inputs package)))
(define (show-help)
- (display (_ "Usage: guix environment [OPTION]... PACKAGE...
-Build an environment that includes the dependencies of PACKAGE and execute a
-shell command in that environment.\n"))
+ (display (_ "Usage: guix environment [OPTION]... PACKAGE... [-- COMMAND...]
+Build an environment that includes the dependencies of PACKAGE and execute
+COMMAND or an interactive shell in that environment.\n"))
(display (_ "
-e, --expression=EXPR create environment for the package that EXPR
evaluates to"))
@@ -113,8 +116,6 @@ shell command in that environment.\n"))
-l, --load=FILE create environment for the package that the code within
FILE evaluates to"))
(display (_ "
- -E, --exec=COMMAND execute COMMAND in new environment"))
- (display (_ "
--ad-hoc include all specified packages in the environment instead
of only their inputs"))
(display (_ "
@@ -135,7 +136,7 @@ shell command in that environment.\n"))
(define %default-options
;; Default to opening a new shell.
- `((exec . ,(or (getenv "SHELL") "/bin/sh"))
+ `((exec . (,%default-shell))
(system . ,(%current-system))
(substitutes? . #t)
(max-silent-time . 3600)
@@ -153,9 +154,9 @@ shell command in that environment.\n"))
(option '("pure") #f #f
(lambda (opt name arg result)
(alist-cons 'pure #t result)))
- (option '(#\E "exec") #t #f
+ (option '(#\E "exec") #t #f ; deprecated
(lambda (opt name arg result)
- (alist-cons 'exec arg result)))
+ (alist-cons 'exec (list %default-shell "-c" arg) result)))
(option '("search-paths") #f #f
(lambda (opt name arg result)
(alist-cons 'search-paths #t result)))
@@ -230,14 +231,24 @@ OUTPUT) tuples, using the build options in OPTS."
(built-derivations derivations)
(return derivations))))))))
-;; Entry point.
-(define (guix-environment . args)
+(define (parse-args args)
+ "Parse the list of command line arguments ARGS."
(define (handle-argument arg result)
(alist-cons 'package arg result))
+ ;; The '--' token is used to separate the command to run from the rest of
+ ;; the operands.
+ (let-values (((args command) (split args "--")))
+ (let ((opts (parse-command-line args %options (list %default-options)
+ #:argument-handler handle-argument)))
+ (if (null? command)
+ opts
+ (alist-cons 'exec command opts)))))
+
+;; Entry point.
+(define (guix-environment . args)
(with-error-handling
- (let* ((opts (parse-command-line args %options (list %default-options)
- #:argument-handler handle-argument))
+ (let* ((opts (parse-args args))
(pure? (assoc-ref opts 'pure))
(ad-hoc? (assoc-ref opts 'ad-hoc?))
(command (assoc-ref opts 'exec))
@@ -282,4 +293,7 @@ OUTPUT) tuples, using the build options in OPTS."
(return #t))
(else
(create-environment inputs paths pure?)
- (return (exit (status:exit-val (system command)))))))))))))
+ (return
+ (exit
+ (status:exit-val
+ (apply system* command)))))))))))))
diff --git a/tests/guix-environment.sh b/tests/guix-environment.sh
index 32faf71a4e..f91c78a801 100644
--- a/tests/guix-environment.sh
+++ b/tests/guix-environment.sh
@@ -40,7 +40,15 @@ test "`wc -l < "$tmpdir/a"`" = 1
cmp "$tmpdir/a" "$tmpdir/b"
# Make sure the exit value is preserved.
-if guix environment --ad-hoc guile-bootstrap --pure -E 'guile -c "(exit 42)"'
+if guix environment --ad-hoc guile-bootstrap --pure -- guile -c '(exit 42)'
+then
+ false
+else
+ test $? = 42
+fi
+
+# Same as above, but with deprecated -E flag.
+if guix environment --ad-hoc guile-bootstrap --pure -E "guile -c '(exit 42)'"
then
false
else
@@ -66,7 +74,7 @@ then
# as returned by '--search-paths'.
guix environment -e '(@@ (gnu packages commencement) gnu-make-boot0)' \
--no-substitutes --pure \
- --exec='echo $PATH $CPATH $LIBRARY_PATH' > "$tmpdir/b"
+ -- /bin/sh -c 'echo $PATH $CPATH $LIBRARY_PATH' > "$tmpdir/b"
( . "$tmpdir/a" ; echo $PATH $CPATH $LIBRARY_PATH ) > "$tmpdir/c"
cmp "$tmpdir/b" "$tmpdir/c"