Only write changed files

pkl-cli/src/main/kotlin/org/pkl/cli/CliFormatterApply.kt

@@ -32,15 +32,17 @@ class CliFormatterApply(cliBaseOptions: CliBaseOptions, path: Path, private val
       val contents = Files.readString(path)
       val (formatted, stat) = format(path, contents)
       status = if (status == 0) stat else status
-      if (stat != 0) continue
-      if (!silent && contents != formatted) {
+      if (stat != 0 || contents == formatted) continue
+      if (!silent) {
         consoleWriter.write(path.toAbsolutePath().toString())
+        consoleWriter.appendLine()
         consoleWriter.flush()
       }
       try {
         path.writeText(formatted, Charsets.UTF_8)
       } catch (e: IOException) {
         consoleWriter.write("Could not overwrite `$path`: ${e.message}")
+        consoleWriter.appendLine()
         consoleWriter.flush()
         status = 1
       }

pkl-cli/src/main/kotlin/org/pkl/cli/CliFormatterCheck.kt

@@ -32,6 +32,7 @@ class CliFormatterCheck(cliBaseOptions: CliBaseOptions, path: Path) :
       status = if (status == 0) stat else status
       if (contents != formatted) {
         consoleWriter.write(path.toAbsolutePath().toString())
+        consoleWriter.appendLine()
         consoleWriter.flush()
         status = 1
       }

pkl-cli/src/main/kotlin/org/pkl/cli/CliFormatterCommand.kt

@@ -39,6 +39,7 @@ constructor(
       return Formatter().format(contents) to 0
     } catch (pe: GenericParserError) {
       consoleWriter.write("Could not format `$file`: $pe")
+      consoleWriter.appendLine()
       consoleWriter.flush()
       return "" to 1
     }

pkl-cli/src/main/kotlin/org/pkl/cli/commands/FormatterCommand.kt

@@ -66,6 +66,6 @@ class FormatterApplyCommand : BaseCommand(name = "apply", helpLink = helpLink) {
       .flag()
 
   override fun run() {
-    CliFormatterApply(baseOptions.baseOptions(emptyList()), path, silent)
+    CliFormatterApply(baseOptions.baseOptions(emptyList()), path, silent).run()
   }
 }

pkl-formatter/src/test/files/FormatterSnippetTests/input/only-doc-comment.pkl

@@ -1,3 +0,0 @@
-/// This file only contains a doc-comment
-///
-/// And nothing else

pkl-formatter/src/test/files/FormatterSnippetTests/output/only-doc-comment.pkl

@@ -1,3 +0,0 @@
-/// This file only contains a doc-comment
-///
-/// And nothing else