Walk query files recursively in tree-sitter test.

We were only walking one level of depth into the `queries/` folder
during invocations of `test`, which made us attempt to open folders
rather than recurse into them.

We have to pull in the `walkdir` crate, which is required for
cross-platform walking of directories.

Fixes #938.

Cargo.lock

@@ -664,6 +664,15 @@ version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eb9e9b8cde282a9fe6a42dd4681319bfb63f121b8a8ee9439c6f4107e58a46f7"
 
+[[package]]
+name = "same-file"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "scopeguard"
 version = "0.3.3"
@@ -869,6 +878,7 @@ dependencies = [
  "tree-sitter",
  "tree-sitter-highlight",
  "tree-sitter-tags",
+ "walkdir",
  "webbrowser",
 ]
 
@@ -969,6 +979,17 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
 
+[[package]]
+name = "walkdir"
+version = "2.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "777182bc735b6424e1a57516d35ed72cb8019d85c8c9bf536dccb3445c1a2f7d"
+dependencies = [
+ "same-file",
+ "winapi",
+ "winapi-util",
+]
+
 [[package]]
 name = "webbrowser"
 version = "0.5.1"
@@ -1001,6 +1022,15 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"

cli/Cargo.toml

@@ -20,12 +20,13 @@ harness = false
 
 [dependencies]
 ansi_term = "0.11"
-cc = "^1.0.58"
 atty = "0.2"
+cc = "^1.0.58"
 clap = "2.32"
 difference = "2.0"
 dirs = "2.0.2"
 glob = "0.3.0"
+html-escape = "0.2.6"
 lazy_static = "1.2.0"
 libloading = "0.5"
 once_cell = "0.1.8"
@@ -35,8 +36,8 @@ serde = "1.0"
 serde_derive = "1.0"
 smallbitvec = "2.3.0"
 tiny_http = "0.6"
+walkdir = "2.3"
 webbrowser = "0.5.1"
-html-escape = "0.2.6"
 
 [dependencies.tree-sitter]
 version = ">= 0.17.0"

cli/src/error.rs

@@ -2,6 +2,7 @@ use super::test_highlight;
 use std::fmt::Write;
 use std::io;
 use tree_sitter::{QueryError, QueryErrorKind};
+use walkdir;
 
 #[derive(Debug)]
 pub struct Error(pub Vec<String>);
@@ -121,3 +122,9 @@ impl From<String> for Error {
         Error::new(error)
     }
 }
+
+impl From<walkdir::Error> for Error {
+    fn from(error: walkdir::Error) -> Self {
+        Error::new(error.to_string())
+    }
+}

cli/src/test.rs

@@ -6,12 +6,14 @@ use lazy_static::lazy_static;
 use regex::bytes::{Regex as ByteRegex, RegexBuilder as ByteRegexBuilder};
 use regex::Regex;
 use std::char;
+use std::ffi::OsStr;
 use std::fmt::Write as FmtWrite;
 use std::fs;
 use std::io::{self, Write};
 use std::path::{Path, PathBuf};
 use std::str;
 use tree_sitter::{Language, LogType, Parser, Query};
+use walkdir::WalkDir;
 
 lazy_static! {
     static ref HEADER_REGEX: ByteRegex = ByteRegexBuilder::new(r"^===+\r?\n([^=]*)\r?\n===+\r?\n")
@@ -122,17 +124,20 @@ pub fn run_tests_at_path(
 
 pub fn check_queries_at_path(language: Language, path: &Path) -> Result<()> {
     if path.exists() {
-        for entry in fs::read_dir(path)? {
-            let entry = entry?;
-            let filepath = entry.file_name();
-            let filepath = filepath.to_str().unwrap_or("");
-            let hidden = filepath.starts_with(".");
-            if !hidden {
-                let content = fs::read_to_string(entry.path()).map_err(Error::wrap(|| {
-                    format!("Error reading query file {:?}", entry.file_name())
-                }))?;
-                Query::new(language, &content).map_err(|e| (filepath, e))?;
-            }
+        for entry in WalkDir::new(path)
+            .into_iter()
+            .filter_map(|e| e.ok())
+            .filter(|e| {
+                e.file_type().is_file()
+                    && e.path().extension().and_then(OsStr::to_str) == Some("scm")
+                    && !e.path().starts_with(".")
+            })
+        {
+            let filepath = entry.file_name().to_str().unwrap_or("");
+            let content = fs::read_to_string(entry.path()).map_err(Error::wrap(|| {
+                format!("Error reading query file {:?}", entry.file_name())
+            }))?;
+            Query::new(language, &content).map_err(|e| (filepath, e))?;
         }
     }
     Ok(())