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Im trying to make a custom launcher to Minecraft which will be helping with mods. Problem is that the launcher is packed inside a LZMA archive. I can open that archive with 7-zip but I cannot modify it and I cannot make a identical another one so the bootstrap fails to decompress it. The original file can be found here: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma .

So, my question is very simple; How I can make a lzma archive identical to above?

Please do not suggest Google, after four hours it has not helped me anyhow.

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7-Zip can extract, but not compress in the file format LZMA. It is on the 7-Zip web page:

Unpacking only: AR, ARJ, CAB, CHM, CPIO, CramFS, DMG, EXT, FAT, GPT, HFS, IHEX, ISO, LZH, LZMA...

You can use the program lzma to compress it. I installed it on my computer with sudo apt install lzma. The command

lzma launcher.pack

will create the file launcher.pack.lzma.

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  • I use windows. And I solved the problem, I changed the bootstrapper to download zip files so i can easily make updates. Thanks for your help anyway, didn't know that about 7-Zip.
    – LiskoSlayer63
    Commented Jul 28, 2016 at 12:06

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