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package_linter/package_linter.py
Alexandre Aubin 6c63667638 Rework formatting of multi-line strings
2019-03-02 02:06:43 +01:00

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#!/usr/bin/env python3
# -*- coding: utf8 -*-
import sys
import os
import re
import json
import shlex
import urllib.request
import codecs
reader = codecs.getreader("utf-8")
return_code = 0
# ############################################################################
# Utilities
# ############################################################################
class c:
HEADER = '\033[94m'
OKBLUE = '\033[94m'
OKGREEN = '\033[92m'
WARNING = '\033[93m'
MAYBE_FAIL = '\033[96m'
FAIL = '\033[91m'
END = '\033[0m'
BOLD = '\033[1m'
UNDERLINE = '\033[4m'
def header(app):
print("""
[{header}{bold}YunoHost App Package Linter{end}]
App packaging documentation - https://yunohost.org/#/packaging_apps
App package example - https://github.com/YunoHost/example_ynh
Official helpers - https://yunohost.org/#/packaging_apps_helpers_en
Experimental helpers - https://github.com/YunoHost-Apps/Experimental_helpers
Analyzing package {header}{app}{end}"""
.format(header=c.HEADER, bold=c.BOLD, end=c.END, app=app))
def print_header(str):
print("\n [" + c.BOLD + c.HEADER + str.title() + c.END + "]\n")
def print_right(str):
print(c.OKGREEN + "✔", str, c.END)
def print_warning(str):
print(c.WARNING + "!", str, c.END)
def print_error(str, reliable=True):
if reliable:
global return_code
return_code = 1
print(c.FAIL + "✘", str, c.END)
else:
print(c.MAYBE_FAIL + "?", str, c.END)
def urlopen(url):
try:
conn = urllib.request.urlopen(url)
except urllib.error.HTTPError as e:
return {'content': '', 'code': e.code}
except urllib.error.URLError as e:
print('URLError')
return {'content': conn.read().decode('UTF8'), 'code': 200}
def file_exists(file_path):
return os.path.isfile(file_path) and os.stat(file_path).st_size > 0
# ############################################################################
# Actual high-level checks
# ############################################################################
class App():
def __init__(self, path):
print_header("LOADING APP")
self.path = path
scripts = ["install", "remove", "upgrade", "backup", "restore"]
self.scripts = { f: Script(self.path, f) for f in scripts }
def analyze(self):
self.misc_file_checks()
self.check_source_management()
self.check_manifest()
for script in self.scripts.values():
if script.exists:
script.analyze()
def misc_file_checks(self):
print_header("MISC FILE CHECKS")
#
# Check for recommended and mandatory files
#
filenames = ("manifest.json", "LICENSE", "README.md",
"scripts/install", "scripts/remove",
"scripts/upgrade",
"scripts/backup", "scripts/restore")
non_mandatory = ("script/backup", "script/restore")
for filename in filenames:
if file_exists(self.path + "/" + filename):
continue
elif filename in non_mandatory:
print_warning("Consider adding a file %s" % filename)
else:
print_error("File %s is mandatory" % filename)
#
# Deprecated php-fpm.ini thing
#
if file_exists(self.path + "/conf/php-fpm.ini"):
print_warning(
"Using a separate php-fpm.ini file is deprecated. "
"Please merge your php-fpm directives directly in the pool file. "
"(c.f. https://github.com/YunoHost-Apps/nextcloud_ynh/issues/138 )"
)
#
# Deprecated usage of 'add_header' in nginx conf
#
for filename in os.listdir(self.path + "/conf"):
if not os.path.isfile(filename):
continue
content = open(self.path + "/conf/" + filename).read()
if "location" in content and "add_header" in content:
print_warning(
"Do not use 'add_header' in the nginx conf. Use 'more_set_headers' instead. "
"(See https://www.peterbe.com/plog/be-very-careful-with-your-add_header-in-nginx "
"and https://github.com/openresty/headers-more-nginx-module#more_set_headers )"
)
def check_source_management(self):
print_header("SOURCES MANAGEMENT")
DIR = os.path.join(self.path, "sources")
# Check if there is more than six files on 'sources' folder
if os.path.exists(os.path.join(self.path, "sources")) \
and len([name for name in os.listdir(DIR) if os.path.isfile(os.path.join(DIR, name))]) > 5:
print_warning(
"[YEP-3.3] Upstream app sources shouldn't be stored in this 'sources' folder of this git repository as a copy/paste\n"
"During installation, the package should download sources from upstream via 'ynh_setup_source'.\n"
"See the helper documentation. "
"Original discussion happened here : "
"https://github.com/YunoHost/issues/issues/201#issuecomment-391549262"
)
def check_manifest(self):
manifest = os.path.join(self.path, 'manifest.json')
if not os.path.exists(manifest):
return
print_header("MANIFEST")
"""
Check if there is no comma syntax issue
"""
try:
with open(manifest, encoding='utf-8') as data_file:
manifest = json.loads(data_file.read())
except:
print_error("[YEP-2.1] Syntax (comma) or encoding issue with manifest.json. Can't check file.")
fields = ("name", "id", "packaging_format", "description", "url", "version",
"license", "maintainer", "requirements", "multi_instance",
"services", "arguments")
for field in fields:
if field not in manifest:
print_warning("[YEP-2.1] \"" + field + "\" field is missing")
"""
Check values in keys
"""
if "packaging_format" not in manifest:
print_error("[YEP-2.1] \"packaging_format\" key is missing")
elif not isinstance(manifest["packaging_format"], int):
print_error("[YEP-2.1] \"packaging_format\": value isn't an integer type")
elif manifest["packaging_format"] != 1:
print_error("[YEP-2.1] \"packaging_format\" field: current format value is '1'")
# YEP 1.1 Name is app
if "id" in manifest:
if not re.match('^[a-z1-9]((_|-)?[a-z1-9])+$', manifest["id"]):
print_error("[YEP-1.1] 'id' field '%s' should respect this regex '^[a-z1-9]((_|-)?[a-z1-9])+$'")
if "name" in manifest:
if len(manifest["name"]) > 22:
print_warning(
"[YEP-1.1] The 'name' field shouldn't be too long to be able to be with one line in the app list. "
"The most current bigger name is actually compound of 22 characters."
)
# YEP 1.2 Put the app in a weel known repo
if "id" in manifest:
official_list_url = "https://raw.githubusercontent.com/YunoHost/apps/master/official.json"
official_list = json.loads(urlopen(official_list_url)['content'])
community_list_url = "https://raw.githubusercontent.com/YunoHost/apps/master/community.json"
community_list = json.loads(urlopen(community_list_url)['content'])
if manifest["id"] not in official_list and manifest["id"] not in community_list:
print_warning("[YEP-1.2] This app is not registered in official or community applications")
# YEP 1.3 License
def license_mentionned_in_readme():
readme_path = os.path.join(path, 'README.md')
if os.path.isfile(readme_path):
return "LICENSE" in open(readme_path).read()
return False
if "license" in manifest:
for license in manifest['license'].replace('&', ',').split(','):
code_license = '<code property="spdx:licenseId">' + license + '</code>'
link = "https://spdx.org/licenses/"
if license == "nonfree":
print_warning("[YEP-1.3] The correct value for non free license in license field is 'non-free' and not 'nonfree'")
license = "non-free"
if license in ["free", "non-free", "dep-non-free"]:
if not license_mentionned_in_readme(self.path):
print_warning(
"[YEP-1.3] The use of '%s' in license field implies "
" to write something about the license in your README.md" % (license)
)
if license in ["non-free", "dep-non-free"]:
print_warning(
"[YEP-1.3] 'non-free' apps can't be officialized. "
" Their integration is still being discussed, especially for apps with non-free dependencies"
)
elif code_license not in urlopen(link)['content']:
print_warning(
"[YEP-1.3] The license '%s' is not registered in https://spdx.org/licenses/ . "
"It can be a typo error. If not, you should replace it by 'free' "
"or 'non-free' and give some explanations in the README.md." % (license)
)
# YEP 1.4 Inform if we continue to maintain the app
# YEP 1.5 Update regularly the app status
# YEP 1.6 Check regularly the evolution of the upstream
# YEP 1.7 - Add an app to the YunoHost-Apps organization
if "id" in manifest:
repo = "https://github.com/YunoHost-Apps/%s_ynh" % (manifest["id"])
is_not_added_to_org = urlopen(repo)['code'] == 404
if is_not_added_to_org:
print_warning("[YEP-1.7] You should add your app in the YunoHost-Apps organisation.")
# YEP 1.8 Publish test request
# YEP 1.9 Document app
if "description" in manifest:
descr = manifest["description"]
if isinstance(descr, dict):
descr = descr.get("en", None)
if descr is None or descr == manifest.get("name", None):
print_warning(
"[YEP-1.9] You should write a good description of the app, "
"at least in english (1 line is enough)."
)
elif "for yunohost" in descr.lower():
print_warning(
"[YEP-1.9] The 'description' should explain what the app actually does. "
"No need to say that it is 'for YunoHost' - this is a YunoHost app "
"so of course we know it is for YunoHost ;-)."
)
# TODO test a specific template in README.md
# YEP 1.10 Garder un historique de version propre
# YEP 1.11 Cancelled
# YEP 2.1
if "multi_instance" in manifest and manifest["multi_instance"] != 1 and manifest["multi_instance"] != 0:
print_error(
"[YEP-2.1] \"multi_instance\" field must be boolean type values 'true' or 'false' and not string type")
if "services" in manifest:
services = ("nginx", "mysql", "uwsgi", "metronome",
"php5-fpm", "php7.0-fpm", "php-fpm",
"postfix", "dovecot", "rspamd")
for service in manifest["services"]:
if service not in services:
# FIXME : wtf is it supposed to mean ...
print_warning("[YEP-2.1] " + service + " service may not exist")
if "install" in manifest["arguments"]:
recognized_types = ("domain", "path", "boolean", "app", "password", "user", "string")
for argument in manifest["arguments"]["install"]:
if "type" not in argument.keys():
print_warning(
"[YEP-2.1] You should specify the type of the argument '%s'. "
"You can use : %s." % (argument["name"], ', '.join(recognized_types))
)
elif argument["type"] not in recognized_types:
print_warning(
"[YEP-2.1] The type '%s' for argument '%s' is not recognized... "
"it probably doesn't behave as you expect ? Choose among those instead : %s" % (argument["type"], argument["name"], ', '.join(recognized_types))
)
if "choices" in argument.keys():
choices = [c.lower() for c in argument["choices"]]
if len(choices) == 2:
if ("true" in choices and "false" in choices) or ("yes" in choices and "no" in choices):
print_warning(
"Argument %s : you might want to simply use a boolean-type argument. "
"No need to specify the choices list yourself." % argument["name"]
)
if "url" in manifest and manifest["url"].endswith("_ynh"):
print_warning(
"'url' is not meant to be the url of the yunohost package, "
"but rather the website or repo of the upstream app itself..."
)
def check_verifications_done_before_modifying_system(script):
"""
Check if verifications are done before modifying the system
"""
if not script.contains("ynh_die") and not script.contains("exit"):
return
# FIXME : this really looks like a very small subset of command that
# can be used ... also packagers are not supposed to use apt or service
# anymore ...
modifying_cmds = ("cp", "mkdir", "rm", "chown", "chmod", "apt-get", "apt",
"service", "find", "sed", "mysql", "swapon", "mount",
"dd", "mkswap", "useradd")
cmds_before_exit = []
for cmd in script.lines:
cmd = " ".join(cmd)
if "ynh_die" in cmd or "exit" in cmd:
break
cmds_before_exit.append(cmd)
for modifying_cmd in modifying_cmds:
if any(modifying_cmd in cmd for cmd in cmds_before_exit):
print_error(
"[YEP-2.4] 'ynh_die' or 'exit' command is executed with system modification before (cmd '%s').\n"
"This system modification is an issue if a verification exit the script.\n"
"You should move this verification before any system modification." % modifying_cmd, False
)
return
def check_set_usage(script):
present = False
if script.name in ["backup", "remove"]:
present = script.contains("ynh_abort_if_errors") or script.contains("set -eu")
else:
present = script.contains("ynh_abort_if_errors")
if script.name == "remove":
# Remove script shouldn't use set -eu or ynh_abort_if_errors
if present:
print_error(
"[YEP-2.4] set -eu or ynh_abort_if_errors is present. "
"If there is a crash, it could put yunohost system in "
"a broken state. For details, look at "
"https://github.com/YunoHost/issues/issues/419"
)
elif not present:
print_error(
"[YEP-2.4] ynh_abort_if_errors is missing. For details, "
"look at https://github.com/YunoHost/issues/issues/419"
)
def check_helper_usage_dependencies(script):
"""
Detect usage of ynh_package_* & apt-get *
and suggest herlpers ynh_install_app_dependencies and ynh_remove_app_dependencies
"""
if script.contains("ynh_package_install") or script.contains("apt-get install"):
print_warning(
"You should not use `ynh_package_install` or `apt-get install`, "
"use `ynh_install_app_dependencies` instead"
)
if script.contains("ynh_package_remove") or script.contains("apt-get remove"):
print_warning(
"You should not use `ynh_package_remove` or `apt-get remove`, "
"use `ynh_remove_app_dependencies` instead"
)
def check_helper_consistency(script):
"""
check if ynh_install_app_dependencies is present in install/upgrade/restore
so dependencies are up to date after restoration or upgrade
"""
if script.name == "install" and script.contains("ynh_install_app_dependencies"):
for name in ["upgrade", "restore"]:
script2 = Script(name, os.path.dirname(script.path))
if script2.exists and not script2.contains("ynh_install_app_dependencies"):
print_warning("ynh_install_app_dependencies should also be in %s script" % name)
if script.name == "install" and script.contains("yunohost service add"):
script2 = Script("remove", os.path.dirname(script.path))
if script2.exists and not script2.contains("yunohost service remove"):
print_error(
"You used 'yunohost service add' in the install script, "
"but not 'yunohost service remove' in the remove script."
)
def check_deprecated_practices(script):
if script.contains("yunohost app setting"):
print_warning("'yunohost app setting' shouldn't be used directly. Please use 'ynh_app_setting_(set,get,delete)' instead.")
if script.contains("yunohost app checkurl"):
print_warning("'yunohost app checkurl' is deprecated. Please use 'ynh_webpath_register' instead.")
if script.contains("yunohost app checkport"):
print_warning("'yunohost app checkport' is deprecated. Please use 'ynh_find_port' instead.")
if script.contains("yunohost app initdb"):
print_warning("'yunohost app initdb' is deprecated. Please use 'ynh_mysql_setup_db' instead.")
if script.contains("exit"):
print_warning("'exit' command shouldn't be used. Please use 'ynh_die' instead.")
if script.contains("rm -rf"):
print_error("[YEP-2.12] You should avoid using 'rm -rf', please use 'ynh_secure_remove' instead")
if script.contains("sed -i"):
print_warning("[YEP-2.12] You should avoid using 'sed -i', please use 'ynh_replace_string' instead")
if script.contains("sudo"):
print_warning(
"[YEP-2.12] You should not need to use 'sudo', the script is being run as root. "
"(If you need to run a command using a specific user, use 'ynh_exec_as')"
)
if script.contains("dd if=/dev/urandom") or script.contains("openssl rand"):
print_warning(
"Instead of 'dd if=/dev/urandom' or 'openssl rand', "
"you might want to use ynh_string_random"
)
if script.contains("systemctl restart nginx") or script.contains("service nginx restart"):
print_error(
"Restarting nginx is quite dangerous (especially for web installs) "
"and should be avoided at all cost. Use 'reload' instead."
)
if script.name == "install" and not script.contains("ynh_print_info") and not script.contains("ynh_script_progression"):
print_warning(
"Please add a few messages for the user, to explain what is going on "
"(in friendly, not-too-technical terms) during the installation. "
"You can use 'ynh_print_info' or 'ynh_script_progression' for this."
)
class Script():
def __init__(self, app_path, name):
self.name = name
self.path = app_path + "/scripts/" + name
self.exists = file_exists(self.path)
if not self.exists:
return
self.lines = list(self.read_file())
def read_file(self):
with open(self.path) as f:
lines = f.readlines()
# Remove trailing spaces, empty lines and comment lines
lines = [line.strip() for line in lines]
lines = [line for line in lines if line and not line.startswith('#')]
# Merge lines when ending with \
lines = '\n'.join(lines).replace("\\\n", "").split("\n")
for line in lines:
try:
line = shlex.split(line, True)
yield line
except Exception as e:
print_warning("%s : Could not parse this line (%s) : %s" % (self.path, e, line))
def contains(self, command):
"""
Iterate on lines to check if command is contained in line
For instance, "app setting" is contained in "yunohost app setting $app ..."
"""
return any(command in line
for line in [ ' '.join(line) for line in self.lines])
def analyze(self):
print_header(self.name.upper() + " SCRIPT")
check_verifications_done_before_modifying_system(self)
check_set_usage(self)
check_helper_usage_dependencies(self)
check_helper_consistency(self)
check_deprecated_practices(self)
def main():
if len(sys.argv) != 2:
print("Give one app package path.")
exit()
app_path = sys.argv[1]
header(app_path)
App(app_path).analyze()
sys.exit(return_code)
if __name__ == '__main__':
main()
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