1 files changed, 74 insertions, 0 deletions
diff --git a/tests/run-make/sysroot-crates-are-unstable/test.py b/tests/run-make/sysroot-crates-are-unstable/test.py
new file mode 100644
index 00000000000..cb77eb34fef
--- /dev/null
+++ b/tests/run-make/sysroot-crates-are-unstable/test.py
@@ -0,0 +1,74 @@
+import sys
+import os
+from os import listdir
+from os.path import isfile, join
+from subprocess import PIPE, Popen
+
+
+# This is n list of files which are stable crates or simply are not crates,
+# we don't check for the instability of these crates as they're all stable!
+STABLE_CRATES = ['std', 'alloc', 'core', 'proc_macro',
+                 'rsbegin.o', 'rsend.o', 'dllcrt2.o', 'crt2.o', 'clang_rt']
+
+
+def convert_to_string(s):
+    if s.__class__.__name__ == 'bytes':
+        return s.decode('utf-8')
+    return s
+
+
+def set_ld_lib_path():
+    var = os.environ.get("LD_LIB_PATH_ENVVAR")
+    rpath = os.environ.get("HOST_RPATH_DIR")
+    if var and rpath:
+        path = os.environ.get(var)
+        if path:
+            os.environ[var] = rpath + os.pathsep + path
+        else:
+            os.environ[var] = rpath
+
+
+def exec_command(command, to_input=None):
+    child = None
+    if to_input is None:
+        child = Popen(command, stdout=PIPE, stderr=PIPE)
+    else:
+        child = Popen(command, stdout=PIPE, stderr=PIPE, stdin=PIPE)
+    stdout, stderr = child.communicate(input=to_input)
+    return (convert_to_string(stdout), convert_to_string(stderr))
+
+
+def check_lib(lib):
+    if lib['name'] in STABLE_CRATES:
+        return True
+    print('verifying if {} is an unstable crate'.format(lib['name']))
+    stdout, stderr = exec_command([os.environ['RUSTC'], '-', '--crate-type', 'rlib',
+                                   '--extern', '{}={}'.format(lib['name'], lib['path'])],
+                                  to_input=('extern crate {};'.format(lib['name'])).encode('utf-8'))
+    if not 'use of unstable library feature' in '{}{}'.format(stdout, stderr):
+        print('crate {} "{}" is not unstable'.format(lib['name'], lib['path']))
+        print('{}{}'.format(stdout, stderr))
+        print('')
+        return False
+    return True
+
+# Generate a list of all crates in the sysroot. To do this we list all files in
+# rustc's sysroot, look at the filename, strip everything after the `-`, and
+# strip the leading `lib` (if present)
+def get_all_libs(dir_path):
+    return [{ 'path': join(dir_path, f), 'name': f[3:].split('-')[0] }
+            for f in listdir(dir_path)
+            if isfile(join(dir_path, f)) and f.endswith('.rlib') and f not in STABLE_CRATES]
+
+
+set_ld_lib_path()
+sysroot = exec_command([os.environ['RUSTC'], '--print', 'sysroot'])[0].replace('\n', '')
+assert sysroot, "Could not read the rustc sysroot!"
+libs = get_all_libs(join(sysroot, 'lib/rustlib/{}/lib'.format(os.environ['TARGET'])))
+
+ret = 0
+for lib in libs:
+    if not check_lib(lib):
+        # We continue so users can see all the not unstable crates.
+        ret = 1
+sys.exit(ret)