demo: use fakeroot to avoid needing sudo

    ==================== Test output for //:mount_tmpfs_without_fakeroot:
    ++ mkdir -p /tmp/target
    ++ mount -t tmpfs none /tmp/target
    mount: /tmp/target: must be superuser to use mount.

    ==================== Test output for //:mount_tmpfs_fakeroot:
    ++ mkdir -p /tmp/target
    ++ mount -t tmpfs none /tmp/target
    ++ findmnt /tmp/target
    TARGET      SOURCE FSTYPE OPTIONS
    /tmp/target none   tmpfs  rw,relatime,uid=1000,gid=1000,inode64

.bazelrc

@@ -1 +1,2 @@
-
+test --announce_rc
+common --lockfile_mode=off

.bazelversion

@@ -0,0 +1 @@
+8.0.0rc6

BUILD.bazel

@@ -1,10 +1,26 @@
+v = """
+#!/bin/bash
+set -uxeo pipefail
+mkdir -p /tmp/target
+mount -t tmpfs none /tmp/target
+findmnt /tmp/target
+"""
+
 genrule(
-    name = "test_sh",
-    outs = ["test.sh"],
-    cmd = "touch $@",
+    name = "create_script",
+    srcs = [],
+    outs = ["mount_tmpfs.sh"],
+    cmd = "echo \"{}\" > $@".format(v),
+    executable = True,
+)
+
+sh_test(
+    name = "mount_tmpfs_fakeroot",
+    srcs = ["mount_tmpfs.sh"],
+    tags = ["requires-fakeroot"],
 )
 
 sh_test(
-    name = "test",
-    srcs = ["test.sh"],
+    name = "mount_tmpfs_without_fakeroot",
+    srcs = ["mount_tmpfs.sh"],
 )