From cbdc2a212c4c42dc321d616a61f0c1d65f72f64a Mon Sep 17 00:00:00 2001
From: James Gilles <jhgilles@mit.edu>
Date: Sat, 8 Apr 2017 18:04:46 -0400
Subject: [PATCH] Add scons, handle languages with no extensions

---
 README.md                         |  2 ++
 languages.json                    | 26 ++++++++++++++++++++++++++
 src/language/language_type.hbs.rs | 10 ++++++----
 tests/data/SConstruct             | 10 ++++++++++
 4 files changed, 44 insertions(+), 4 deletions(-)
 create mode 100644 tests/data/SConstruct

diff --git a/README.md b/README.md
index 197632ef5..aad3f8db8 100644
--- a/README.md
+++ b/README.md
@@ -266,6 +266,7 @@ C Header
 C#
 C Shell
 Clojure
+CMake
 CoffeeScript
 Cogent
 ColdFusion
@@ -334,6 +335,7 @@ Ruby HTML
 Rust
 Sass
 Scala
+Scons
 Standard ML
 SQL
 Swift
diff --git a/languages.json b/languages.json
index f7a40cac5..3b3a92153 100644
--- a/languages.json
+++ b/languages.json
@@ -1187,6 +1187,32 @@
                 "scala"
             ]
         },
+        "Scons":{
+            "base":"hash",
+            "quotes":[
+                [
+                    "\\\"",
+                    "\\\""
+                ],
+                [
+                    "'",
+                    "'"
+                ],
+                [
+                    "\\\"\\\"\\\"",
+                    "\\\"\\\"\\\""
+                ],
+                [
+                    "'''",
+                    "'''"
+                ]
+            ],
+            "filenames":[
+                "sconstruct",
+                "sconscript"
+            ]
+        },
+
         "Sml":{
             "name":"Standard ML (SML)",
             "base":"func",
diff --git a/src/language/language_type.hbs.rs b/src/language/language_type.hbs.rs
index 95347be9f..826e8eded 100644
--- a/src/language/language_type.hbs.rs
+++ b/src/language/language_type.hbs.rs
@@ -85,10 +85,12 @@ impl LanguageType {
         if let Some(extension) = extension {
             match &*extension {
                 {{~#each languages}}
-                    {{~#each this.extensions}}
-                        "{{~this}}" {{~#unless @last}} | {{~/unless}}
-                    {{~/each}}
-                        => Some({{~@key}}),
+                    {{~#if this.extensions}}
+                        {{~#each this.extensions}}
+                            "{{~this}}" {{~#unless @last}} | {{~/unless}}
+                        {{~/each}}
+                            => Some({{~@key}}),
+                    {{~/if}}
                 {{~/each}}
                 extension => {
                     warn!("Unknown extension: {}", extension);
diff --git a/tests/data/SConstruct b/tests/data/SConstruct
new file mode 100644
index 000000000..d5a4641cb
--- /dev/null
+++ b/tests/data/SConstruct
@@ -0,0 +1,10 @@
+#!python
+# 10 lines 3 code 3 comments 4 blanks
+
+# this is a comment
+
+Program('cpp.cpp') # this is a line-ending comment
+
+env = Environment(CCFLAGS='-O3')
+env.Append(CCFLAGS='-O3')
+