1 files changed, 95 insertions, 0 deletions
diff --git a/admin/check-style-shell.awk b/admin/check-style-shell.awk
new file mode 100644
index 000000000000..43d3472cb45b
--- /dev/null
+++ b/admin/check-style-shell.awk
@@ -0,0 +1,95 @@
+# Copyright 2015 The Kyua Authors.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright
+#   notice, this list of conditions and the following disclaimer in the
+#   documentation and/or other materials provided with the distribution.
+# * Neither the name of Google Inc. nor the names of its contributors
+#   may be used to endorse or promote products derived from this software
+#   without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+function warn(msg) {
+    print FILENAME "[" FNR "]: " msg > "/dev/stderr"
+    error = 1
+}
+
+BEGIN {
+    skip = 0
+    error = 0
+}
+
+/CHECK_STYLE_DISABLE/ {
+    skip = 1
+    next
+}
+
+/CHECK_STYLE_ENABLE/ {
+    skip = 0
+    next
+}
+
+/CHECK_STYLE_(ENABLE|DISABLE)/ {
+    next
+}
+
+{
+    if (skip)
+        next
+}
+
+/^[ \t]*#/ {
+    next
+}
+
+/[$ \t]+_[a-zA-Z0-9]+=/ {
+    warn("Variable should not start with an underline")
+}
+
+/[^\\]\$[^0-9!'"$?@#*{}(|\/,]+/ {
+    warn("Missing braces around variable name")
+}
+
+/=(""|'')/ {
+    warn("Assignment to the empty string does not need quotes");
+}
+
+/basename[ \t]+/ {
+    warn("Use parameter expansion instead of basename");
+}
+
+/if[ \t]+(test|![ \t]+test)/ {
+    warn("Use [ instead of test");
+}
+
+/[ \t]+(test|\[).*==/ {
+    warn("test(1)'s == operator is not portable");
+}
+
+/if.*;[ \t]*fi$/ {
+    warn("Avoid using a single-line if conditional");
+}
+
+END {
+    if (skip)
+        warn("Missing CHECK_STYLE_ENABLE");
+    if (error)
+        exit 1
+}