有部分老项目是在Eclipse环境开发的,最近公司要求应用瘦身,老项目也在其中。如果在 AS 下开发就不会有这样的问题,但是在 Eclipse 中就不太方便了,于是就写了这个脚本。第一次用Python写东西,代码里可能会有许多 Java、C 这样的痕迹,见谅。
使用方法
将 python 目录下的 delUnused.py 放到项目目录下,然后直接运行即可。
代码说明
利用lint进行代码审查
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lint - - check UnusedResources - - xml [resultPath] [projectPath]
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命令含义是检查项目中未使用的资源文件,并且用xml格式输出结果,需要提供检查结果输出的路径和项目路径。在脚本中已经自动提供了。
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def exec_lint_command():
cmd = 'lint --check UnusedResources --xml %s %s' % (_get_lint_result_path(), _get_project_dir_path())
p = subprocess.Popen(cmd, shell = True , stdout = subprocess.PIPE, stdin = subprocess.PIPE, stderr = subprocess.PIPE)
c = p.stdout.readline().decode()
while c:
print (c)
c = p.stdout.readline().decode()
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这里给一个检查结果实例吧
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<issue
id = "UnusedResources"
severity = "Warning"
message = "The resource `R.layout.activity_all_player` appears to be unused"
category = "Performance"
priority = "3"
summary = "Unused resources"
explanation = "Unused resources make applications larger and slow down builds."
errorLine1 = "<LinearLayout xmlns:android=" http: / / schemas.android.com / apk / res / android"
"
errorLine2 = "^"
quickfix = "studio" >
<location
file = "res\layout\activity_all_player.xml"
line = "2"
column = "1" / >
< / issue>
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我们能用到的信息有 id message location 等。
解析检查结果
我是利用 minidom 解析的,具体的解析方法不多说,参考。
获取根节点
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def _parse_lint_report():
file = minidom.parse(_get_lint_result_path())
root = file .documentElement
beans = _parse_xml(root)
return beans
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解析第一层子节点
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def _parse_xml(element, beans = None ):
if beans is None :
beans = []
for node in element.childNodes:
if node.nodeName = = ISSUE_KEY and node.nodeType is node.ELEMENT_NODE:
lint_bean = _LintBean()
lint_bean. id = node.getAttribute(ID_KEY)
lint_bean.severity = node.getAttribute(SEVERITY_KEY)
lint_bean.message = node.getAttribute(MESSAGE_KEY)
_parse_location(node, lint_bean)
lint_bean. print ()
beans.append(lint_bean)
return beans
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解析location 子节点
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def _parse_location(node, bean):
if not node.hasChildNodes():
return
for child in node.childNodes:
if child.nodeName = = LOCATION_KEY and node.nodeType is node.ELEMENT_NODE:
bean.location. file = child.getAttribute(LOCATION_FILE_KEY)
bean.location.line = child.getAttribute(LOCATION_LINE_KEY)
bean.location.column = child.getAttribute(LOCATION_COLUMN_KEY)
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用Java习惯了,解析数据喜欢用Bean
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class _Location( object ):
def __init__( self ):
self . file = ''
self .line = 0
self .column = 0
class _LintBean( object ):
def __init__( self ):
self . id = ''
self .severity = ''
self .message = ''
self .location = _Location()
def print ( self ):
print ( 'find a %s, cause: %s. filePath: %s. line: %s' % (
self . id , self .message, self .location. file , self .location.line))
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处理无用资源
解析完数据,可以得到三种资源:
- Drawable,就一个文件,可以直接删
- xml中的一个节点,但是这个xml中就这一个节点,直接删文件
- xml中的一个节点,这个xml中有多个节点,删除节点
对这三种资源进行区分和删除
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for lint in lint_result:
total_unused_resource + = 1
if lint. id ! = 'UnusedResources' :
continue
if lint.location.line ! = '':
is_single = _is_single_node(lint.location. file )
if is_single:
total_del_file + = 1
del_file(lint.location. file )
else :
total_remove_attr + = 1
node_name = get_node_name(lint.message)
del_node(lint.location. file , node_name)
else :
total_del_file + = 1
del_file(lint.location. file )
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删除文件
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def del_file(file_path):
try :
os.remove(file_path)
print ( 'remove %s success.' % file_path)
except FileNotFoundError:
print ( 'remove %s error.' % file_path)
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删除节点:
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def del_node(file_path, node_name):
file = minidom.parse(file_path)
root = file .documentElement
nodes = root.childNodes
for node in nodes:
if node.nodeType in (node.TEXT_NODE, node.COMMENT_NODE):
continue
if node_name = = node.getAttribute( 'name' ):
root.removeChild(node)
file .writexml( open (file_path, 'w' , encoding = 'UTF-8' ), encoding = 'UTF-8' )
print ( 'remove %s, node_name:%s. success!' % (file_path, node_name))
return
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总结
以上所述是小编给大家介绍的使用python 和 lint 删除项目无用资源的方法,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持!
原文链接:https://juejin.im/post/5a39ccc65188251fbd33c37f?utm_source=tuicool&utm_medium=referral