add basic julia language support

Author: patrickdevivo

pkg/comments/comments_test.go

@@ -75,3 +75,17 @@ func TestKotlinFiles(t *testing.T) {
 		t.Fail()
 	}
 }
+
+func TestJuliaFiles(t *testing.T) {
+	var comments Comments
+	err := SearchDir("testdata/julia", func(comment *Comment) {
+		comments = append(comments, comment)
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if len(comments) != 3 {
+		t.Fail()
+	}
+}

pkg/comments/languages.go

@@ -64,4 +64,5 @@ var LanguageParseOptions map[Language]*lege.ParseOptions = map[Language]*lege.Pa
 	// so lines beginning with /// or //! will be picked up by this start // and include a / or ! preceding the comment
 	"Rust":   {Boundaries: []lege.Boundary{{Start: "///", End: "\n"}, {Start: "//!", End: "\n"}, {Start: "//", End: "\n"}}},
 	"Kotlin": CStyleCommentOptions,
+	"Julia":  {Boundaries: []lege.Boundary{{Start: "#=", End: "=#"}, {Start: "#", End: "\n"}}},
 }

pkg/comments/testdata/julia/example.jl

@@ -0,0 +1,8 @@
+
+# function to calculate the volume of a sphere
+function sphere_vol(r)
+    # julia allows Unicode names (in UTF-8 encoding)
+    # so either "pi" or the symbol π can be used
+
+    return 4/3*pi*r^3
+end