Add checks for incorrect src subfolder name case

check/checkconfigurations/checkconfigurations.go

@@ -971,6 +971,21 @@ var configurations = []Type{
 		ErrorModes:      []checkmode.Type{checkmode.Default},
 		CheckFunction:   checkfunctions.LibraryFolderNameGTMaxLength,
 	},
+	{
+		ProjectType:     projecttype.Library,
+		Category:        "structure",
+		Subcategory:     "",
+		ID:              "",
+		Brief:           "incorrect src folder case",
+		Description:     "",
+		MessageTemplate: "Incorrect src folder case. This will cause the library to not be recognized on case-sensitive operating systems. See: https://arduino.github.io/arduino-cli/latest/library-specification/#library-root-folder",
+		DisableModes:    nil,
+		EnableModes:     []checkmode.Type{checkmode.Default},
+		InfoModes:       nil,
+		WarningModes:    nil,
+		ErrorModes:      []checkmode.Type{checkmode.Default},
+		CheckFunction:   checkfunctions.IncorrectLibrarySrcFolderNameCase,
+	},
 	{
 		ProjectType:     projecttype.Library,
 		Category:        "structure",
@@ -1046,6 +1061,21 @@ var configurations = []Type{
 		ErrorModes:      []checkmode.Type{checkmode.Default},
 		CheckFunction:   checkfunctions.RecursiveLibraryWithUtilityFolder,
 	},
+	{
+		ProjectType:     projecttype.Sketch,
+		Category:        "structure",
+		Subcategory:     "",
+		ID:              "",
+		Brief:           "incorrect src folder case",
+		Description:     "",
+		MessageTemplate: "Incorrect src folder case. This will cause the source files under it to not be compiled on case-sensitive operating systems. See: https://arduino.github.io/arduino-cli/latest/sketch-specification/#src-subfolder",
+		DisableModes:    nil,
+		EnableModes:     []checkmode.Type{checkmode.Default},
+		InfoModes:       nil,
+		WarningModes:    []checkmode.Type{checkmode.Default},
+		ErrorModes:      []checkmode.Type{checkmode.Strict},
+		CheckFunction:   checkfunctions.IncorrectSketchSrcFolderNameCase,
+	},
 	{
 		ProjectType:     projecttype.Sketch,
 		Category:        "structure",

check/checkfunctions/library.go

@@ -904,16 +904,8 @@ func LibraryPropertiesMisspelledOptionalField() (result checkresult.Type, output
 
 // LibraryInvalid checks whether the provided path is a valid library.
 func LibraryInvalid() (result checkresult.Type, output string) {
-	directoryListing, err := checkdata.LoadedLibrary().SourceDir.ReadDir()
-	if err != nil {
-		panic(err)
-	}
-
-	directoryListing.FilterOutDirs()
-	for _, potentialHeaderFile := range directoryListing {
-		if library.HasHeaderFileValidExtension(potentialHeaderFile) {
-			return checkresult.Pass, ""
-		}
+	if library.ContainsHeaderFile(checkdata.LoadedLibrary().SourceDir) {
+		return checkresult.Pass, ""
 	}
 
 	return checkresult.Fail, ""
@@ -1016,6 +1008,28 @@ func LibraryFolderNameGTMaxLength() (result checkresult.Type, output string) {
 	return checkresult.Pass, ""
 }
 
+// IncorrectLibrarySrcFolderNameCase checks for incorrect case of src subfolder name in recursive format libraries.
+func IncorrectLibrarySrcFolderNameCase() (result checkresult.Type, output string) {
+	if library.ContainsMetadataFile(checkdata.ProjectPath()) && library.ContainsHeaderFile(checkdata.ProjectPath()) {
+		// Flat layout, so no special treatment of src subfolder.
+		return checkresult.NotRun, ""
+	}
+
+	// The library is intended to have the recursive layout.
+	directoryListing, err := checkdata.ProjectPath().ReadDir()
+	if err != nil {
+		panic(err)
+	}
+	directoryListing.FilterDirs()
+
+	path, found := containsIncorrectPathBaseCase(directoryListing, "src")
+	if found {
+		return checkresult.Fail, path.String()
+	}
+
+	return checkresult.Pass, ""
+}
+
 // MisspelledExamplesFolderName checks for incorrectly spelled `examples` folder name.
 func MisspelledExamplesFolderName() (result checkresult.Type, output string) {
 	directoryListing, err := checkdata.ProjectPath().ReadDir()

check/checkfunctions/library_test.go

@@ -310,6 +310,16 @@ func TestLibraryFolderNameGTMaxLength(t *testing.T) {
 	checkLibraryCheckFunction(LibraryFolderNameGTMaxLength, testTables, t)
 }
 
+func TestIncorrectLibrarySrcFolderNameCase(t *testing.T) {
+	testTables := []libraryCheckFunctionTestTable{
+		{"Flat, not precompiled", "Flat", checkresult.NotRun, ""},
+		{"Incorrect case", "IncorrectSrcFolderNameCase", checkresult.Fail, ""},
+		{"Correct case", "Recursive", checkresult.Pass, ""},
+	}
+
+	checkLibraryCheckFunction(IncorrectLibrarySrcFolderNameCase, testTables, t)
+}
+
 func TestMisspelledExamplesFolderName(t *testing.T) {
 	testTables := []libraryCheckFunctionTestTable{
 		{"Correctly spelled", "ExamplesFolder", checkresult.Pass, ""},

check/checkfunctions/sketch.go

@@ -25,6 +25,22 @@ import (
 	"github.com/arduino/arduino-check/project/sketch"
 )
 
+// IncorrectSketchSrcFolderNameCase checks for incorrect case of src subfolder name in recursive format libraries.
+func IncorrectSketchSrcFolderNameCase() (result checkresult.Type, output string) {
+	directoryListing, err := checkdata.ProjectPath().ReadDir()
+	if err != nil {
+		panic(err)
+	}
+	directoryListing.FilterDirs()
+
+	path, found := containsIncorrectPathBaseCase(directoryListing, "src")
+	if found {
+		return checkresult.Fail, path.String()
+	}
+
+	return checkresult.Pass, ""
+}
+
 // ProhibitedCharactersInSketchFileName checks for prohibited characters in the sketch file names.
 func ProhibitedCharactersInSketchFileName() (result checkresult.Type, output string) {
 	directoryListing, _ := checkdata.ProjectPath().ReadDir()

check/checkfunctions/sketch_test.go

@@ -60,6 +60,15 @@ func checkSketchCheckFunction(checkFunction Type, testTables []sketchCheckFuncti
 	}
 }
 
+func TestIncorrectSketchSrcFolderNameCase(t *testing.T) {
+	testTables := []sketchCheckFunctionTestTable{
+		{"Incorrect case", "IncorrectSrcFolderNameCase", checkresult.Fail, ""},
+		{"Correct case", "Valid", checkresult.Pass, ""},
+	}
+
+	checkSketchCheckFunction(IncorrectSketchSrcFolderNameCase, testTables, t)
+}
+
 func TestProhibitedCharactersInSketchFileName(t *testing.T) {
 	testTables := []sketchCheckFunctionTestTable{
 		{"Has prohibited characters", "ProhibitedCharactersInFileName", checkresult.Fail, "^Prohibited CharactersInFileName.h$"},

check/checkfunctions/testdata/libraries/IncorrectSrcFolderNameCase/library.properties

@@ -0,0 +1,9 @@
+name=IncorrectSrcFolderNameCase
+version=1.0.0
+author=Cristian Maglie <c.maglie@example.com>, Pippo Pluto <pippo@example.com>
+maintainer=Cristian Maglie <c.maglie@example.com>
+sentence=A library that makes coding a web server a breeze.
+paragraph=Supports HTTP1.1 and you can do GET and POST.
+category=Communication
+url=http://example.com/
+architectures=avr

check/checkfunctions/testdata/sketches/IncorrectSrcFolderNameCase/IncorrectSrcFolderNameCase.ino

@@ -0,0 +1,2 @@
+void setup() {}
+void loop() {}

check/checkfunctions/testdata/sketches/SrcSubfolder/SrcSubfolder.ino

@@ -0,0 +1,2 @@
+void setup() {}
+void loop() {}

project/library/library.go

@@ -17,6 +17,8 @@
 package library
 
 import (
+	"fmt"
+
 	"github.com/arduino/go-paths-helper"
 )
 
@@ -35,6 +37,30 @@ func HasHeaderFileValidExtension(filePath *paths.Path) bool {
 	return hasHeaderFileValidExtension
 }
 
+// ContainsHeaderFile checks whether the provided path contains a file with valid header extension.
+func ContainsHeaderFile(searchPath *paths.Path) bool {
+	if searchPath.NotExist() {
+		panic(fmt.Sprintf("Error: provided path %s does not exist.", searchPath))
+	}
+	if searchPath.IsNotDir() {
+		panic(fmt.Sprintf("Error: provided path %s is not a directory.", searchPath))
+	}
+
+	directoryListing, err := searchPath.ReadDir()
+	if err != nil {
+		panic(err)
+	}
+
+	directoryListing.FilterOutDirs()
+	for _, potentialHeaderFile := range directoryListing {
+		if HasHeaderFileValidExtension(potentialHeaderFile) {
+			return true
+		}
+	}
+
+	return false
+}
+
 // See: https://arduino.github.io/arduino-cli/latest/library-specification/#library-metadata
 var metadataFilenames = map[string]struct{}{
 	"library.properties": empty,
@@ -49,6 +75,30 @@ func IsMetadataFile(filePath *paths.Path) bool {
 	return false
 }
 
+// ContainsMetadataFile checks whether the provided path contains an Arduino library metadata file.
+func ContainsMetadataFile(searchPath *paths.Path) bool {
+	if searchPath.NotExist() {
+		panic(fmt.Sprintf("Error: provided path %s does not exist.", searchPath))
+	}
+	if searchPath.IsNotDir() {
+		panic(fmt.Sprintf("Error: provided path %s is not a directory.", searchPath))
+	}
+
+	directoryListing, err := searchPath.ReadDir()
+	if err != nil {
+		panic(err)
+	}
+
+	directoryListing.FilterOutDirs()
+	for _, potentialMetadataFile := range directoryListing {
+		if IsMetadataFile(potentialMetadataFile) {
+			return true
+		}
+	}
+
+	return false
+}
+
 // See: https://arduino.github.io/arduino-cli/latest/library-specification/#library-examples
 var examplesFolderValidNames = map[string]struct{}{
 	"examples": empty,

project/library/library_test.go

@@ -0,0 +1,41 @@
+// This file is part of arduino-check.
+//
+// Copyright 2020 ARDUINO SA (http://www.arduino.cc/)
+//
+// This software is released under the GNU General Public License version 3,
+// which covers the main part of arduino-check.
+// The terms of this license can be found at:
+// https://www.gnu.org/licenses/gpl-3.0.en.html
+//
+// You can be released from the requirements of the above licenses by purchasing
+// a commercial license. Buying such a license is mandatory if you want to
+// modify or otherwise use the software for commercial activities involving the
+// Arduino software without disclosing the source code of your own applications.
+// To purchase a commercial license, send an email to license@arduino.cc.
+
+package library
+
+import (
+	"os"
+	"testing"
+
+	"github.com/arduino/go-paths-helper"
+	"github.com/stretchr/testify/assert"
+)
+
+var testDataPath *paths.Path
+
+func init() {
+	workingDirectory, _ := os.Getwd()
+	testDataPath = paths.New(workingDirectory, "testdata")
+}
+
+func TestContainsHeaderFile(t *testing.T) {
+	assert.True(t, ContainsHeaderFile(testDataPath.Join("ContainsHeaderFile")))
+	assert.False(t, ContainsHeaderFile(testDataPath.Join("ContainsNoHeaderFile")))
+}
+
+func TestContainsMetadataFile(t *testing.T) {
+	assert.True(t, ContainsMetadataFile(testDataPath.Join("ContainsMetadataFile")))
+	assert.False(t, ContainsMetadataFile(testDataPath.Join("ContainsNoMetadataFile")))
+}