使用Python比較RPM軟件包

Question

我正在嘗試將包含所需Linux軟件包的csv文件與當前安裝的軟件包進行比較。 比較將輸出所有未安裝的軟件包或比當前安裝的軟件包新的軟件包。

問題是我無法遍歷已安裝軟件包的列表並顯示所有匹配，例如具有相同名稱和版本的軟件包，但是應該兩次顯示不同的體系結構（例如compat-libstdc ++-33），但是我僅在下面的腳本中獲得第一擊。

#!/usr/bin/python

import rpm
import csv
import sys
import os

'''
Script to check installed rpms against a csv file containing the package name and version similar to the list below:
atk,1.12.2
libart_lgpl,2.3
info,4.9
libsepol,1.15.2
libusb,0.1.12
libfontenc,1.4.2

'''

if len(sys.argv) !=2:
        print ''
        print 'Usage: ', sys.argv[0], '/path/to/csv_input_file'
        print ''
        sys.exit(1)

if not os.path.isfile(sys.argv[1]):
        print ''
        print sys.argv[1], 'not found!'
        print ''
        sys.exit(1)

else:
        input_csv = sys.argv[1]

pkgRequired = csv.reader(open(input_csv),delimiter=',')

pkgInstalledName = []
pkgInstalledVersion = []
pkgInstalledArch = []

ts = rpm.TransactionSet()
mi = ts.dbMatch()

for h in mi:
        pkgInstalledName.append((h['name']))
        pkgInstalledVersion.append((h['version']))
        pkgInstalledArch.append((h['arch']))

for row in pkgRequired:
        pkgRequiredName = row[0]
        pkgRequiredVersion = row[1]
        #pkgRequiredArch = row[2]

        if pkgRequiredName in pkgInstalledName:

                if pkgInstalledVersion[pkgInstalledName.index(pkgRequiredName)] >= pkgRequiredVersion:
                        pass
                else:
                        print '\nInstalled:  ',pkgInstalledName[pkgInstalledName.index(pkgRequiredName)], pkgInstalledVersion[pkgInstalledName.index(pkgRequiredName)], pkgInstalledArch[pkgInstalledName.index(pkgRequiredName)], ' \nRequired: ', ' ', pkgRequiredName,pkgRequiredVersion

Answer 1

假設您讀取已安裝軟件包列表的方式沒有問題（我對rpm模塊不熟悉），那么您唯一的問題就是使用index（）函數。 此函數返回具有指定值的項的首次出現-這不是您想要的。

正確的實現（效率也更高）將是：

installedPackages = {} #create a hash table, mapping package names to LISTS of installed package versions and architectures
for h in mi: 
  l = installedPackages.get(h['name'], list()) #return either the existing list, or a new one if this is the first time that the name appears.
  l.append( (h['version'], h['arch']) )

...
if requiredPackageName in installedPackages:
  for ver, arch in installedPackages[requiredPackageName]: print ...

Answer 2

這就是我最終為使此工作所做的事情。 該腳本當前不檢查所需軟件包的體系結構，但至少它顯示已安裝的arch。 該腳本有效（據我所知），但可以改進，因為這是我在python的第一個:)

    #!/usr/bin/python

import rpm
import csv
import sys
import os

'''
Script to check installed rpms against a csv file containing the package name and version similar to the list below:
atk,1.12.2
libart_lgpl,2.3
info,4.9
libsepol,1.15.2
libusb,0.1.12
libfontenc,1.4.2

'''

#silverbullet - 20120301

if len(sys.argv) !=2:
        print ''
        print 'Usage: ', sys.argv[0], '/path/to/csv_input_file'
        print ''
        sys.exit(1)

if not os.path.isfile(sys.argv[1]):
        print ''
        print sys.argv[1], 'not found!'
        print ''
        sys.exit(1)

else:
        input_csv = sys.argv[1]

pkgRequired = csv.reader(open(input_csv),delimiter=',')

pkgInstalledName = []
pkgInstalledVersion = []
pkgInstalledArch = []

ts = rpm.TransactionSet()
mi = ts.dbMatch()

for h in mi:
        pkgInstalledName.append((h['name']))
        pkgInstalledVersion.append((h['version']))
        pkgInstalledArch.append((h['arch']))

for row in pkgRequired:
        try:
                pkgRequiredName = row[0]
                pkgRequiredVersion = row[1]
                #pkgRequiredArch = row[2] - This is not implemented yet, ie, script will ignore architecture in csv input file
        except:
                print "Unexpected Error. Check if input is csv format with no blank lines. "#, sys.exc_info()[1]
                break
        else:
                for pos, pkg in enumerate(pkgInstalledName):
                        if pkg == pkgRequiredName:
                                if pkgInstalledVersion[pos] >= pkgRequiredVersion:
                                        pass
                                else:
                                        print '\nInstalled:', pkgInstalledName[pos], pkgInstalledVersion[pos], pkgInstalledArch[pos], '\nRequired: ', pkg, pkgRequiredVersion