pack: Add '--root'.

* guix/scripts/pack.scm (%options, show-help): Add "--root".
(guix-pack): Honor it.
* tests/guix-pack.sh: Test it.
* doc/guix.texi (Invoking guix pack): Document it.

1 files changed, 9 insertions, 2 deletions

diff --git a/tests/guix-pack.sh b/tests/guix-pack.sh
index 3cd0404748..0feae6d1e8 100644
--- a/tests/guix-pack.sh
+++ b/tests/guix-pack.sh
@@ -33,6 +33,9 @@ guix pack --version
 GUIX_BUILD_OPTIONS="--no-substitutes"
 export GUIX_BUILD_OPTIONS
 
+test_directory="`mktemp -d`"
+trap 'chmod -Rf +w "$test_directory"; rm -rf "$test_directory"' EXIT
+
 # Build a tarball with no compression.
 guix pack --compression=none --bootstrap guile-bootstrap
 
@@ -42,14 +45,18 @@ out2="`guix pack --bootstrap -e '(@ (gnu packages bootstrap) %bootstrap-guile)'`
 test -n "$out1"
 test "$out1" = "$out2"
 
+# Test '--root'.
+guix pack -r "$test_directory/my-guile" --bootstrap guile-bootstrap
+test "`readlink "$test_directory/my-guile"`" = "$out1"
+guix gc --list-roots | grep "^$test_directory/my-guile$"
+rm "$test_directory/my-guile"
+
 # Build a tarball with a symlink.
 the_pack="`guix pack --bootstrap -S /opt/gnu/bin=bin guile-bootstrap`"
 
 # Try to extract it.  Note: we cannot test whether /opt/gnu/bin/guile itself
 # exists because /opt/gnu/bin may be an absolute symlink to a store item that
 # has been GC'd.
-test_directory="`mktemp -d`"
-trap 'chmod -Rf +w "$test_directory"; rm -rf "$test_directory"' EXIT
 cd "$test_directory"
 tar -xf "$the_pack"
 test -L opt/gnu/bin