fall back to . when os.Getwd returns an error

Author: rhysd

config.go

@@ -12,8 +12,8 @@ import (
 	"gopkg.in/yaml.v3"
 )
 
-// IgnorePatterns is a list of regular expressions. They are used for ignoring errors by matching
-// to the error messages.
+// IgnorePatterns is a list of regular expressions. These patterns are used for filtering errors by
+// matching the error messages.
 type IgnorePatterns []*regexp.Regexp
 
 // Match returns whether the given error should be ignored due to the "ignore" configuration.
@@ -69,9 +69,9 @@ type Config struct {
 	Paths map[string]PathConfig `yaml:"paths"`
 }
 
-// PathConfigsFor returns a list of all PathConfig values matching to the given file path. The path must
+// PathConfigs returns a list of all PathConfig values matching to the given file path. The path must
 // be relative to the root of the project.
-func (cfg *Config) PathConfigsFor(path string) []PathConfig {
+func (cfg *Config) PathConfigs(path string) []PathConfig {
 	path = filepath.ToSlash(path)
 
 	var ret []PathConfig

config_test.go

@@ -201,7 +201,7 @@ paths:
 
 	for _, tc := range tests {
 		var ignored bool
-		for _, c := range cfg.PathConfigsFor(tc.path) {
+		for _, c := range cfg.PathConfigs(tc.path) {
 			if c.Ignore.Match(&Error{Message: tc.msg}) {
 				ignored = true
 				break

linter.go

@@ -166,11 +166,11 @@ func NewLinter(out io.Writer, opts *LinterOptions) (*Linter, error) {
 		formatter = f
 	}
 
-	cwd := opts.WorkingDir
-	if cwd == "" {
-		if d, err := os.Getwd(); err == nil {
-			cwd = d
-		}
+	cwd := "."
+	if opts.WorkingDir != "" {
+		cwd = opts.WorkingDir
+	} else if d, err := os.Getwd(); err == nil {
+		cwd = d
 	}
 
 	stdin := "<stdin>"
@@ -628,7 +628,7 @@ func (l *Linter) check(
 		}
 	}
 
-	all = l.filterErrors(all, cfg.PathConfigsFor(path))
+	all = l.filterErrors(all, cfg.PathConfigs(path))
 
 	for _, err := range all {
 		err.Filepath = path // Populate filename in the error