use root to find configuration of toml file

README.md

@@ -88,7 +88,7 @@ Because this option makes changes to the input files, it is good to make a backu
 
 `markdownlint-cli` reuses [the rules][rules] from `markdownlint` package.
 
-Configuration is stored in JSON, JSONC, YAML, or INI files in the same [config format][config]. Further, configuration can be stored as TOML file under ```[tool.markdownlint]```
+Configuration is stored in JSON, JSONC, YAML, INI, or TOML files in the same [config format][config].
 
 A sample configuration file:
 
@@ -103,7 +103,6 @@ A sample configuration file:
 ```
 
 ```toml
-[tool.markdownlint]
 default = true
 heading-style = { style = "atx_closed" }
 ul-indent = { indent = 4 }
@@ -127,8 +126,6 @@ If a rule is passed to both `--enable` and `--disable`, it will be disabled.
 
 > JS configuration files must be provided via the `--config` argument; they are not automatically loaded because running untrusted code is a security concern.
 
-> TOML configuration files must be provided via the `--config` argument; they are not automatically loaded.
-
 ## Exit codes
 
 `markdownlint-cli` returns one of the following exit codes:

markdownlint.js

@@ -37,7 +37,7 @@ function yamlParse(text) {
 }
 
 function tomlParse(text) {
-  return require('toml').parse(text).tool.markdownlint;
+  return require('toml').parse(text);
 }
 
 const exitCodes = {
@@ -47,7 +47,7 @@ const exitCodes = {
   unexpectedError: 4
 };
 
-const projectConfigFiles = ['.markdownlint.jsonc', '.markdownlint.json', '.markdownlint.yaml', '.markdownlint.yml'];
+const projectConfigFiles = ['.markdownlint.jsonc', '.markdownlint.json', '.markdownlint.yaml', '.markdownlint.yml', '.markdownlint.toml'];
 const configParsers = [jsoncParse, yamlParse, tomlParse];
 const fsOptions = {encoding: 'utf8'};
 const processCwd = process.cwd();
@@ -57,6 +57,7 @@ function readConfiguration(userConfigFile) {
 
   // Load from well-known config files
   let config = rc('markdownlint', {});
+
   for (const projectConfigFile of projectConfigFiles) {
     try {
       fs.accessSync(projectConfigFile, fs.R_OK);

test/config-files/toml/.markdownlint.toml

@@ -0,0 +1,2 @@
+[no-trailing-punctuation]
+punctuation="$"

test/config-files/toml/heading-dollar.md

@@ -0,0 +1,3 @@
+# Heading$
+
+Text

test/md043-config.toml

@@ -1,3 +1,2 @@
-[tool.markdownlint]
 MD012 = false
 MD043 = { headings = ["# First", "## Second", "### Third"] }

test/test.js

@@ -448,6 +448,8 @@ test('.markdownlint.jsonc in cwd is used automatically', getCwdConfigFileTest('j
 
 test('.markdownlint.json in cwd is used automatically', getCwdConfigFileTest('json'));
 
+test('.markdownlint.toml in cwd is used automatically', getCwdConfigFileTest('toml'));
+
 test('.markdownlint.yaml in cwd is used automatically', getCwdConfigFileTest('yaml'));
 
 test('.markdownlint.yml in cwd is used automatically', getCwdConfigFileTest('yml'));