updated CodeGeneration
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169
Software/codegen/prepare_littlefs.py
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169
Software/codegen/prepare_littlefs.py
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# SCRIPT TO GZIP CRITICAL FILES FOR ACCELERATED WEBSERVING
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# see also https://community.platformio.org/t/question-esp32-compress-files-in-data-to-gzip-before-upload-possible-to-spiffs/6274/10
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import glob
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import shutil
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import gzip
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import os
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import subprocess
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Import("env")
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Import("projenv")
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# Setze die Pfade zu den Tools als Variablen
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html_minifier_path = os.path.join(os.getenv("APPDATA"), "npm", "html-minifier.cmd")
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uglifyjs_path = os.path.join(os.getenv("APPDATA"), "npm", "uglifyjs.cmd")
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terser_path = os.path.join(os.getenv("APPDATA"), "npm", "terser.cmd")
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cssnano_path = os.path.join(os.getenv("APPDATA"), "npm", "cssnano.cmd")
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def minify_html(input_path, output_path):
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subprocess.run([html_minifier_path, '--collapse-whitespace', '--remove-comments', input_path, '-o', output_path])
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def minify_js(input_path, output_path):
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subprocess.run([terser_path, input_path, '-o', output_path, '-c', '-m'])
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def minify_css(input_path, output_path):
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subprocess.run([cssnano_path, '--no-discardUnused', input_path, output_path])
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def process_file(src_path, dest_path):
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_, file_extension = os.path.splitext(src_path)
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# Extrahiere den Ordnerpfad im Zielverzeichnis
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dest_dir = os.path.dirname(dest_path)
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# Erstelle den Ordner und alle dazugehörigen Unterordner, falls sie nicht existieren
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os.makedirs(dest_dir, exist_ok=True)
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if file_extension.lower() == '.js':
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minify_js(src_path, dest_path)
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elif file_extension.lower() == '.css':
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minify_css(src_path, dest_path)
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elif file_extension.lower() in ['.html', '.htm']:
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minify_html(src_path, dest_path)
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else:
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# Kopiere nicht bearbeitbare Dateien direkt in den Zielordner
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shutil.copy2(src_path, dest_path)
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def strip_files(src_dir, dest_dir):
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# Erstelle den Zielordner und alle dazugehörigen Unterordner, falls sie nicht existieren
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os.makedirs(dest_dir, exist_ok=True)
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# Durchlaufe alle Dateien und Unterverzeichnisse im Quellordner
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for root, _, files in os.walk(src_dir):
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for filename in files:
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src_path = os.path.join(root, filename)
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dest_path = os.path.relpath(src_path, src_dir)
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dest_path = os.path.join(dest_dir, dest_path)
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# Verarbeite nur Dateien (keine Unterverzeichnisse)
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process_file(src_path, dest_path)
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def gzip_file(src_path, dst_path):
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with open(src_path, 'rb') as src, gzip.open(dst_path, 'wb') as dst:
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for chunk in iter(lambda: src.read(4096), b""):
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dst.write(chunk)
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def getListOfFiles(dirName):
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# create a list of file and sub directories
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# names in the given directory
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listOfFile = os.listdir(dirName)
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allFiles = list()
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# Iterate over all the entries
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for entry in listOfFile:
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# Create full path
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fullPath = os.path.join(dirName, entry)
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# If entry is a directory then get the list of files in this directory
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if os.path.isdir(fullPath):
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allFiles = allFiles + getListOfFiles(fullPath)
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else:
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allFiles.append(fullPath)
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return allFiles
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def remove_prefix(text, prefix):
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if text.startswith(prefix):
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return text[len(prefix):]
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return text # or whatever
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# Compress files from 'data_src/' to 'data/'
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def gzip_webfiles(source, target, env):
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# Filetypes to compress
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filetypes_to_gzip = ['.css', '.png', '.js', '.ico', '.woff2', '.json']
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print('\nGZIP: Starting gzip-Process for LittleFS-Image...\n')
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data_src_dir_path = os.path.join(env.get('PROJECT_DIR'), 'data_src')
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data_temp_dir_path = os.path.join(env.get('PROJECT_DIR'), 'data_stripped')
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strip_files(data_src_dir_path, data_temp_dir_path)
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data_dir_path = env.get('PROJECT_DATA_DIR')
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# check if data and datasrc exist. If the first exists and not the second, it renames it
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if(os.path.exists(data_dir_path) and not os.path.exists(data_temp_dir_path)):
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print('GZIP: Directory "'+data_dir_path +
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'" exists, "'+data_temp_dir_path+'" is not found.')
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print('GZIP: Renaming "' + data_dir_path +
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'" to "' + data_temp_dir_path + '"')
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os.rename(data_dir_path, data_temp_dir_path)
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# Delete the 'data' directory
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if(os.path.exists(data_dir_path)):
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print('GZIP: Deleting the "data" directory ' + data_dir_path)
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shutil.rmtree(data_dir_path)
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# Recreate empty 'data' directory
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print('GZIP: Re-creating an empty data directory ' + data_dir_path)
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os.mkdir(data_dir_path)
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# Determine the files to compress
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files_to_copy = []
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files_to_gzip = []
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all_data_src = getListOfFiles(data_temp_dir_path)
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for file in all_data_src:
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file_name, file_extension = os.path.splitext(file)
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print(file_name + " has filetype " + file_extension)
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if file_extension in filetypes_to_gzip:
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files_to_gzip.append(file)
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else:
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filename_subdir = remove_prefix(file, data_temp_dir_path)
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files_to_copy.append(filename_subdir)
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for file in files_to_copy:
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print('GZIP: Copying file from: ' + data_temp_dir_path + file + ' to: ' + data_dir_path + file)
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os.makedirs(os.path.dirname(data_dir_path + file), exist_ok=True)
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shutil.copy(data_temp_dir_path + file, data_dir_path + file)
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# Compress and move files
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was_error = False
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try:
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for source_file_path in files_to_gzip:
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print('GZIP: compressing... ' + source_file_path)
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filename_subdir = remove_prefix(source_file_path, data_temp_dir_path)
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target_file_path = data_dir_path + filename_subdir
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os.makedirs(os.path.dirname(target_file_path), exist_ok=True)
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print('GZIP: Compressed... ' + target_file_path)
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gzip_file(source_file_path, target_file_path + ".gz")
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except IOError as e:
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was_error = True
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print('GZIP: Failed to compress file: ' + source_file_path)
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# print( 'GZIP: EXCEPTION... {}'.format( e ) )
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if was_error:
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print('GZIP: Failure/Incomplete.\n')
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else:
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print('GZIP: Compressed correctly.\n')
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shutil.rmtree(data_temp_dir_path)
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return
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def gzip_binffiles(source, target, env):
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littlefsbin = target[0].get_abspath()
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targetbin = os.path.join(os.path.dirname(littlefsbin), 'filesystem.fs')
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shutil.copyfile(littlefsbin, targetbin)
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gzip_file(targetbin, os.path.join(str(targetbin) + '.gz'))
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os.remove(targetbin)
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return
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# IMPORTANT, this needs to be added to call the routine
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env.AddPreAction('$BUILD_DIR/littlefs.bin', gzip_webfiles)
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env.AddPostAction('$BUILD_DIR/littlefs.bin', gzip_binffiles)
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