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  1. #!/usr/bin/python3
  2. import os, json, sys
  3.  
  4. # default value
  5. MinecraftDir = './.minecraft'
  6. Version = ''
  7. maxMen = '2048m'
  8. ID = ''
  9.  
  10. # get jar files path from the json file
  11. def getJars(minecraftDir, version):
  12. 	jsonFilePath = minecraftDir+'/versions/'+version+'/'+version+'.json'
  13.  
  14. 	with open(jsonFilePath, 'r') as jsonFile :
  15. 		jsonFileContent = jsonFile.read()
  16.  
  17. 	jsonFileKeys = json.loads( jsonFileContent )
  18.  
  19. 	jars = ''
  20. 	for x in jsonFileKeys['libraries']:
  21. 		jarFileParts = x['name'].split(':')
  22. 		jarFile =	MinecraftDir+'/libraries/' + \
  23. 					jarFileParts[0].replace('.','/')+'/'+jarFileParts[1] +'/'+jarFileParts[2] + '/' + \
  24. 					jarFileParts[1]+'-'+jarFileParts[2]+'.jar'
  25.  
  26. 		jars += jarFile+':'
  27.  
  28. 	if 'inheritsFrom' in jsonFileKeys.keys():
  29. 		jars += getJars(minecraftDir, jsonFileKeys['inheritsFrom'])
  30.  
  31. 	return jars
  32.  
  33. # generate the Minecraft Argvs from the json file
  34. def getMinecraftArgvs(minecraftDir, version, ID):
  35. 	jsonFilePath = minecraftDir+'/versions/'+version+'/'+version+'.json'
  36. 	with open(jsonFilePath, 'r') as jsonFile :
  37. 		jsonFileContent = jsonFile.read()
  38.  
  39. 	jsonFileKeys = json.loads( jsonFileContent )
  40. 	argvs = jsonFileKeys['minecraftArguments']
  41. 	argvs = argvs	.replace('${auth_player_name}', ID)\
  42. 					.replace('${version_name}', '{}')\
  43. 					.replace('${game_directory}', minecraftDir)\
  44. 					.replace('${assets_root}', minecraftDir+'/assets')\
  45. 					.replace('${assets_index_name}', jsonFileKeys['assets'])\
  46. 					.replace('${auth_uuid}', '{}')\
  47. 					.replace('${auth_access_token}', '{}')\
  48. 					.replace('${user_type}', 'Legacy')\
  49. 					.replace('${version_type}', jsonFileKeys['type'])\
  50. 					.replace('${user_properties}', '{}')
  51. 	argvs = jsonFileKeys['mainClass'] + ' ' + argvs
  52. 	return argvs
  53.  
  54.  
  55. # process argvs for this script
  56. job = 0
  57. theUsageText = 'Usage:\t\t'+sys.argv[0]+' [-d Minecraft_dir] [-v version] [-m 2048m] Username\n\t\t\tLaunch Minecraft\n\n\t\t'+sys.argv[0]+' [-d Minecraft_dir] -l\n\t\t\tList Minecraft versions'
  58.  
  59. if len(sys.argv) == 1:
  60. 	print(theUsageText)
  61. 	sys.exit()
  62. else:
  63. 	t=1
  64. 	while t<len(sys.argv):
  65. 		if sys.argv[t] == '-d':
  66. 			t+=1
  67. 			MinecraftDir = sys.argv[t]
  68. 		elif sys.argv[t] == '-v':
  69. 			t+=1
  70. 			Version = sys.argv[t]
  71. 		elif sys.argv[t] == '-m':
  72. 			t+=1
  73. 			maxMen = sys.argv[t]
  74. 		elif sys.argv[t] == '-h':
  75. 			print(theUsageText)
  76. 			sys.exit()
  77. 		elif sys.argv[t] == '-l':
  78. 			job = 1
  79. 		else:
  80. 			ID = sys.argv[t]
  81.  
  82. 		t+=1
  83.  
  84. if job == 1:		#if the job is list Minecraft versions, do it and exit
  85. 	print('Minecraft versions:')
  86. 	versions = os.listdir(MinecraftDir+'/versions/')
  87. 	versions.sort(reverse=True)
  88. 	for x in versions:
  89. 		print( '\t'+x )
  90. 	sys.exit()
  91.  
  92. if ID == '':		#if do not specify a ID, print the usage and exit
  93. 	print(theUsageText)
  94. 	sys.exit()
  95.  
  96. if Version == '':	#if do not specify a version, set the Version value to the latest version
  97. 	versions = os.listdir(MinecraftDir+'/versions/')
  98. 	versions.sort(reverse=True)
  99. 	Version = versions[0]
  100. # end of this part
  101.  
  102.  
  103. # generate command to launch Minecraft
  104. befour = 'java -Xincgc -XX:-UseAdaptiveSizePolicy -XX:-OmitStackTraceInFastThrow -Xmn128m -Xmx'+maxMen+' -Djava.library.path='+MinecraftDir+'/versions/'+Version+'/'+Version+'-natives -Dfml.ignoreInvalidMinecraftCertificates=true -Dfml.ignorePatchDiscrepancies=true -Duser.home=/ -cp "'
  105.  
  106. after = getMinecraftArgvs(MinecraftDir, Version ,ID)
  107.  
  108. jars = getJars(MinecraftDir, Version)
  109. jars += MinecraftDir+'/versions/'+Version+'/'+Version+'.jar" '
  110.  
  111. cmd = befour + jars + after
  112. # end of this part
  113.  
  114.  
  115. # launch Minecraft
  116. os.system(cmd)
  117.  
Success #stdin #stdout 0.03s 10240KB
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stdin
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Standard input is empty
stdout
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Usage:		./prog [-d Minecraft_dir] [-v version] [-m 2048m] Username
			Launch Minecraft

		./prog [-d Minecraft_dir] -l
			List Minecraft versions
https://ideone.com/aVWnVh
language:
Python 3 (python  3.9.5)
created:
8 years ago
visibility:
public

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