Add check_library_manager_compliance

Author: per1234

.travis.yml

@@ -128,6 +128,8 @@ script:
 
   - check_keywords_txt "${SKETCHBOOK_FOLDER}/libraries/NewPing"
 
+  - check_library_manager_compliance "${SKETCHBOOK_FOLDER}/libraries/NewPing"
+
   # Test library installed from .zip with rename
   # Test library installed from .zip with dot in the folder name
   # Test board from hardware package manually installed from compressed file download

README.md

@@ -125,6 +125,10 @@ Check [library.properties](https://github.com/arduino/Arduino/wiki/Arduino-IDE-1
 Check [keywords.txt](https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5:-Library-specification#keywords) files for errors.
 - Parameter: **searchPath** - Path containing keywords.txt files. The path will be searched recursively and all keywords.txt files found under it will be checked.
 
+##### `check_library_manager_compliance libraryPath'
+Make some additional checks for compliance with the requirements for adding a library to the [Library Manager index](https://github.com/arduino/Arduino/wiki/Library-Manager-FAQ). This function should be used in combination with `check_library_structure' and 'check_library_properties' to ensure full compliance with the requirements.
+- Parameter: **libraryPath** - Path of the library to check.
+
 ##### `build_sketch sketchPath boardID allowFail IDEversion`
 ##### `build_sketch sketchPath boardID allowFail [IDEversionList]`
 ##### `build_sketch sketchPath boardID allowFail startIDEversion endIDEversion`

arduino-ci-script.sh

@@ -1725,6 +1725,41 @@ function check_keywords_txt()
 }
 
 
+# https://github.com/arduino/Arduino/wiki/Library-Manager-FAQ#how-is-the-library-list-generated
+function check_library_manager_compliance()
+{
+  local -r libraryPath="$1"
+  # Replace backslashes with slashes
+  local -r libraryPathWithSlashes="${libraryPath//\\//}"
+  # Remove trailing slash
+  local -r normalizedLibraryPath="${libraryPathWithSlashes%/}"
+
+  # Check whether folder exists
+  if [[ ! -d "$normalizedLibraryPath" ]]; then
+    echo "ERROR: Specified folder: $libraryPath doesn't exist."
+    return 1
+  fi
+
+  # Check for .exe files
+  if [[ $(find "$normalizedLibraryPath" -type f -name '*.exe') ]]; then
+    echo "ERROR: .exe file found."
+    return 2
+  fi
+
+  # Check for .development file
+  if [[ $(find "$normalizedLibraryPath" -type f -name '.development') ]]; then
+    echo "ERROR: .development file found."
+    return 3
+  fi
+
+  # Check for .development file
+  if [[ $(find "$normalizedLibraryPath" -type l) ]]; then
+    echo "ERROR: Symlink found."
+    return 4
+  fi
+}
+
+
 # Set default verbosity (must be called after the function definitions
 set_script_verbosity 0