Support for multiple paths

CHANGELOG.md

@@ -74,6 +74,10 @@
   [JP Simard](https://github.com/jpsim)
   [#1420](https://github.com/realm/SwiftLint/issues/1420)
 
+* Support for passing multiple path arguments.  
+  [Ben Asher](https://github.com/benasher44)
+  [#810](https://github.com/realm/SwiftLint/issues/810)
+
 #### Bug Fixes
 
 * Update `LowerACLThanParent` rule to not lint extensions.  

Source/swiftlint/Commands/AutoCorrectCommand.swift

@@ -27,7 +27,7 @@ struct AutoCorrectCommand: CommandProtocol {
             useTabs = options.useTabs
         }
 
-        return configuration.visitLintableFiles(path: options.path, action: "Correcting",
+        return configuration.visitLintableFiles(paths: options.paths, action: "Correcting",
                                                 quiet: options.quiet,
                                                 useScriptInputFiles: options.useScriptInputFiles,
                                                 forceExclude: options.forceExclude,
@@ -57,7 +57,7 @@ struct AutoCorrectCommand: CommandProtocol {
 }
 
 struct AutoCorrectOptions: OptionsProtocol {
-    let path: String
+    let paths: [String]
     let configurationFile: String
     let useScriptInputFiles: Bool
     let quiet: Bool
@@ -68,16 +68,18 @@ struct AutoCorrectOptions: OptionsProtocol {
     let useTabs: Bool
 
     // swiftlint:disable line_length
-    static func create(_ path: String) -> (_ configurationFile: String) -> (_ useScriptInputFiles: Bool) -> (_ quiet: Bool) -> (_ forceExclude: Bool) -> (_ format: Bool) -> (_ cachePath: String) -> (_ ignoreCache: Bool) -> (_ useTabs: Bool) -> AutoCorrectOptions {
-        return { configurationFile in { useScriptInputFiles in { quiet in { forceExclude in { format in { cachePath in { ignoreCache in { useTabs in
-            self.init(path: path, configurationFile: configurationFile, useScriptInputFiles: useScriptInputFiles, quiet: quiet, forceExclude: forceExclude, format: format, cachePath: cachePath, ignoreCache: ignoreCache, useTabs: useTabs)
-        }}}}}}}}
+    static func create(_ path: String) -> (_ paths: [String]) -> (_ configurationFile: String) -> (_ useScriptInputFiles: Bool) -> (_ quiet: Bool) -> (_ forceExclude: Bool) -> (_ format: Bool) -> (_ cachePath: String) -> (_ ignoreCache: Bool) -> (_ useTabs: Bool) -> AutoCorrectOptions {
+        return { paths in { configurationFile in { useScriptInputFiles in { quiet in { forceExclude in { format in { cachePath in { ignoreCache in { useTabs in
+            let allPaths = Set([path] + paths)
+            return self.init(paths: Array(allPaths), configurationFile: configurationFile, useScriptInputFiles: useScriptInputFiles, quiet: quiet, forceExclude: forceExclude, format: format, cachePath: cachePath, ignoreCache: ignoreCache, useTabs: useTabs)
+        }}}}}}}}}
     }
 
     static func evaluate(_ mode: CommandMode) -> Result<AutoCorrectOptions, CommandantError<CommandantError<()>>> {
         // swiftlint:enable line_length
         return create
             <*> mode <| pathOption(action: "correct")
+            <*> mode <| pathsArgument(action: "correct")
             <*> mode <| configOption
             <*> mode <| useScriptInputFilesOption
             <*> mode <| quietOption(action: "correcting")

Source/swiftlint/Commands/LintCommand.swift

@@ -117,7 +117,7 @@ struct LintCommand: CommandProtocol {
 }
 
 struct LintOptions: OptionsProtocol {
-    let path: String
+    let paths: [String]
     let useSTDIN: Bool
     let configurationFile: String
     let strict: Bool
@@ -132,16 +132,18 @@ struct LintOptions: OptionsProtocol {
     let enableAllRules: Bool
 
     // swiftlint:disable line_length
-    static func create(_ path: String) -> (_ useSTDIN: Bool) -> (_ configurationFile: String) -> (_ strict: Bool) -> (_ lenient: Bool) -> (_ forceExclude: Bool) -> (_ useScriptInputFiles: Bool) -> (_ benchmark: Bool) -> (_ reporter: String) -> (_ quiet: Bool) -> (_ cachePath: String) -> (_ ignoreCache: Bool) -> (_ enableAllRules: Bool) -> LintOptions {
-        return { useSTDIN in { configurationFile in { strict in { lenient in { forceExclude in { useScriptInputFiles in { benchmark in { reporter in { quiet in { cachePath in { ignoreCache in { enableAllRules in
-            self.init(path: path, useSTDIN: useSTDIN, configurationFile: configurationFile, strict: strict, lenient: lenient, forceExclude: forceExclude, useScriptInputFiles: useScriptInputFiles, benchmark: benchmark, reporter: reporter, quiet: quiet, cachePath: cachePath, ignoreCache: ignoreCache, enableAllRules: enableAllRules)
-        }}}}}}}}}}}}
+    static func create(_ path: String) -> (_ paths: [String]) -> (_ useSTDIN: Bool) -> (_ configurationFile: String) -> (_ strict: Bool) -> (_ lenient: Bool) -> (_ forceExclude: Bool) -> (_ useScriptInputFiles: Bool) -> (_ benchmark: Bool) -> (_ reporter: String) -> (_ quiet: Bool) -> (_ cachePath: String) -> (_ ignoreCache: Bool) -> (_ enableAllRules: Bool) -> LintOptions {
+        return { paths in { useSTDIN in { configurationFile in { strict in { lenient in { forceExclude in { useScriptInputFiles in { benchmark in { reporter in { quiet in { cachePath in { ignoreCache in { enableAllRules in
+            let allPaths = Set([path] + paths)
+            return self.init(paths: Array(allPaths), useSTDIN: useSTDIN, configurationFile: configurationFile, strict: strict, lenient: lenient, forceExclude: forceExclude, useScriptInputFiles: useScriptInputFiles, benchmark: benchmark, reporter: reporter, quiet: quiet, cachePath: cachePath, ignoreCache: ignoreCache, enableAllRules: enableAllRules)
+        }}}}}}}}}}}}}
     }
 
     static func evaluate(_ mode: CommandMode) -> Result<LintOptions, CommandantError<CommandantError<()>>> {
         // swiftlint:enable line_length
         return create
             <*> mode <| pathOption(action: "lint")
+            <*> mode <| pathsArgument(action: "lint")
             <*> mode <| Option(key: "use-stdin", defaultValue: false,
                                usage: "lint standard input")
             <*> mode <| configOption

Source/swiftlint/Extensions/Configuration+CommandLine.swift

@@ -48,15 +48,15 @@ private func autoreleasepool(block: () -> Void) { block() }
 
 extension Configuration {
 
-    func visitLintableFiles(path: String, action: String, useSTDIN: Bool = false,
+    func visitLintableFiles(paths: [String], action: String, useSTDIN: Bool = false,
                             quiet: Bool = false, useScriptInputFiles: Bool, forceExclude: Bool,
                             cache: LinterCache? = nil, parallel: Bool = false,
                             visitorBlock: @escaping (Linter) -> Void) -> Result<[File], CommandantError<()>> {
-        return getFiles(path: path, action: action, useSTDIN: useSTDIN, quiet: quiet, forceExclude: forceExclude,
+        return getFiles(paths: paths, action: action, useSTDIN: useSTDIN, quiet: quiet, forceExclude: forceExclude,
                         useScriptInputFiles: useScriptInputFiles)
         .flatMap { files -> Result<[Configuration: [File]], CommandantError<()>> in
             if files.isEmpty {
-                let errorMessage = "No lintable files found at path '\(path)'"
+                let errorMessage = "No lintable files found at paths: '\(paths.joined(separator: ", "))'"
                 return .failure(.usageError(description: errorMessage))
             }
             return .success(Dictionary(grouping: files, by: configuration(for:)))
@@ -105,7 +105,7 @@ extension Configuration {
     }
 
     // swiftlint:disable function_parameter_count
-    fileprivate func getFiles(path: String, action: String, useSTDIN: Bool, quiet: Bool, forceExclude: Bool,
+    fileprivate func getFiles(paths: [String], action: String, useSTDIN: Bool, quiet: Bool, forceExclude: Bool,
                               useScriptInputFiles: Bool) -> Result<[File], CommandantError<()>> {
         if useSTDIN {
             let stdinData = FileHandle.standardInput.readDataToEndOfFile()
@@ -117,26 +117,36 @@ extension Configuration {
             return scriptInputFiles()
         }
         if !quiet {
-            let message = "\(action) Swift files " + (path.isEmpty ? "in current working directory" : "at path \(path)")
+            let filesInfo = paths.isEmpty ? "in current working directory" : "at paths \(paths.joined(separator: ", "))"
+            let message = "\(action) Swift files \(filesInfo)"
             queuedPrintError(message)
         }
-        return .success(lintableFiles(inPath: path, forceExclude: forceExclude))
+        return .success(paths.flatMap {
+            self.lintableFiles(inPath: $0, forceExclude: forceExclude)
+        })
     }
     // swiftlint:enable function_parameter_count
 
+    private static func rootPath(from paths: [String]) -> String? {
+        // We don't know the root when more than one path is passed (i.e. not useful if the root of 2 paths is ~)
+        return paths.count == 1 ? paths.first?.absolutePathStandardized() : nil
+    }
+
     // MARK: Lint Command
 
     init(options: LintOptions) {
         let cachePath = options.cachePath.isEmpty ? nil : options.cachePath
         let optional = !CommandLine.arguments.contains("--config")
-        self.init(path: options.configurationFile, rootPath: options.path.absolutePathStandardized(),
+        self.init(path: options.configurationFile,
+                  rootPath: type(of: self).rootPath(from: options.paths),
                   optional: optional, quiet: options.quiet,
-                  enableAllRules: options.enableAllRules, cachePath: cachePath)
+                  enableAllRules: options.enableAllRules,
+                  cachePath: cachePath)
     }
 
     func visitLintableFiles(options: LintOptions, cache: LinterCache? = nil,
                             visitorBlock: @escaping (Linter) -> Void) -> Result<[File], CommandantError<()>> {
-        return visitLintableFiles(path: options.path, action: "Linting", useSTDIN: options.useSTDIN,
+        return visitLintableFiles(paths: options.paths, action: "Linting", useSTDIN: options.useSTDIN,
                                   quiet: options.quiet, useScriptInputFiles: options.useScriptInputFiles,
                                   forceExclude: options.forceExclude, cache: cache, parallel: true,
                                   visitorBlock: visitorBlock)
@@ -147,7 +157,7 @@ extension Configuration {
     init(options: AutoCorrectOptions) {
         let cachePath = options.cachePath.isEmpty ? nil : options.cachePath
         let optional = !CommandLine.arguments.contains("--config")
-        self.init(path: options.configurationFile, rootPath: options.path.absolutePathStandardized(),
+        self.init(path: options.configurationFile, rootPath: type(of: self).rootPath(from: options.paths),
                   optional: optional, quiet: options.quiet, cachePath: cachePath)
     }
 

Source/swiftlint/Helpers/CommonOptions.swift

@@ -7,6 +7,11 @@ func pathOption(action: String) -> Option<String> {
                   usage: "the path to the file or directory to \(action)")
 }
 
+func pathsArgument(action: String) -> Argument<[String]> {
+    return Argument(defaultValue: [""],
+                    usage: "list of paths to the files or directories to \(action)")
+}
+
 let configOption = Option(key: "config",
                           defaultValue: Configuration.fileName,
                           usage: "the path to SwiftLint's configuration file")