environment: Add --manifest option.

* guix/scripts/environment.scm (show-help, %options): Add -m/--manifest.
(options/resolve-packages): Handle manifests.
* tests/guix-envronment.sh: Add a test.
* doc/guix.texi (Invoking guix environment): Document it.

1 files changed, 9 insertions, 0 deletions

diff --git a/tests/guix-environment.sh b/tests/guix-environment.sh
index bf5ca17fa54..b44aca099d3 100644
--- a/tests/guix-environment.sh
+++ b/tests/guix-environment.sh
@@ -62,6 +62,15 @@ fi
 guix environment --bootstrap --ad-hoc guile-bootstrap --pure \
      -- "$SHELL" -c 'test -f "$GUIX_ENVIRONMENT/bin/guile"'
 
+# Make sure 'GUIX_ENVIRONMENT' points to the profile when building from a
+# manifest.
+echo "(use-modules (guix profiles) (gnu packages bootstrap))
+
+(packages->manifest (list %bootstrap-guile))
+" > $tmpdir/manifest.scm
+guix environment --bootstrap --manifest=$tmpdir/manifest.scm --pure \
+     -- "$SHELL" -c 'test -f "$GUIX_ENVIRONMENT/bin/guile"'
+
 # Make sure '-r' works as expected.
 rm -f "$gcroot"
 expected="`guix environment --bootstrap --ad-hoc guile-bootstrap \