shell: By default load the local 'manifest.scm' or 'guix.scm' file.

* guix/scripts/shell.scm (parse-args): Add call to 'auto-detect-manifest'.
(authorized-directory-file, authorized-shell-directory?)
(find-file-in-parent-directories, auto-detect-manifest): New procedures.
* tests/guix-shell.sh: Add test.
* doc/guix.texi (Invoking guix shell): Document it.

1 files changed, 48 insertions, 2 deletions

diff --git a/tests/guix-shell.sh b/tests/guix-shell.sh
index f08637f7ff..95725cba2d 100644
--- a/tests/guix-shell.sh
+++ b/tests/guix-shell.sh
@@ -22,15 +22,55 @@
 
 guix shell --version
 
+configdir="t-guix-shell-config-$$"
 tmpdir="t-guix-shell-$$"
-trap 'rm -r "$tmpdir"' EXIT
-mkdir "$tmpdir"
+trap 'rm -r "$tmpdir" "$configdir"' EXIT
+mkdir "$tmpdir" "$configdir" "$configdir/guix"
+
+XDG_CONFIG_HOME="$(realpath $configdir)"
+export XDG_CONFIG_HOME
 
 guix shell --bootstrap --pure guile-bootstrap -- guile --version
 
 # '--ad-hoc' is a thing of the past.
 ! guix shell --ad-hoc guile-bootstrap
 
+# Ignoring unauthorized files.
+cat > "$tmpdir/guix.scm" <<EOF
+This is a broken guix.scm file.
+EOF
+(cd "$tmpdir"; SHELL="$(type -P true)" guix shell --bootstrap)
+
+# Authorize the directory.
+echo "$(realpath "$tmpdir")" > "$configdir/guix/shell-authorized-directories"
+
+# Ignoring 'manifest.scm' and 'guix.scm' in non-interactive use.
+(cd "$tmpdir"; guix shell --bootstrap -- true)
+mv "$tmpdir/guix.scm" "$tmpdir/manifest.scm"
+(cd "$tmpdir"; guix shell --bootstrap -- true)
+rm "$tmpdir/manifest.scm"
+
+# Honoring the local 'manifest.scm' file.
+cat > "$tmpdir/manifest.scm" <<EOF
+(specifications->manifest '("guile-bootstrap"))
+EOF
+cat > "$tmpdir/fake-shell.sh" <<EOF
+#!$SHELL
+# This fake shell allows us to test interactive use.
+exec echo "\$GUIX_ENVIRONMENT"
+EOF
+chmod +x "$tmpdir/fake-shell.sh"
+profile1="$(cd "$tmpdir"; SHELL="$(realpath fake-shell.sh)" guix shell --bootstrap)"
+profile2="$(guix shell --bootstrap guile-bootstrap -- "$SHELL" -c 'echo $GUIX_ENVIRONMENT')"
+test -n "$profile1"
+test "$profile1" = "$profile2"
+rm "$tmpdir/manifest.scm"
+
+# Do not read manifest when passed '-q'.
+echo "Broken manifest." > "$tmpdir/manifest.scm"
+(cd "$tmpdir"; SHELL="$(realpath fake-shell.sh)" guix shell --bootstrap -q)
+rm "$tmpdir/manifest.scm"
+
 if guile -c '(getaddrinfo "www.gnu.org" "80" AI_NUMERICSERV)' 2> /dev/null
 then
     # Compute the build environment for the initial GNU Make.
@@ -51,4 +91,10 @@ then
 
     # 'make-boot0' itself must not be listed.
     ! guix gc --references "$profile" | grep make-boot0
+
+    # Honoring the local 'guix.scm' file.
+    echo '(@ (guix tests) gnu-make-for-tests)' > "$tmpdir/guix.scm"
+    (cd "$tmpdir"; guix shell --bootstrap --search-paths --pure > "b")
+    cmp "$tmpdir/a" "$tmpdir/b"
+    rm "$tmpdir/guix.scm"
 fi