Define file permissions

[gimenete]

Hi,

First of all, thanks for this neat and useful module.

I'm generating zip files and now I need to define a file entry as executable. The zip format does not support this. But the tar format should support it. However I don't see how tell this npm module the permissions of a file entry. I've seen the source code for the tar format and I just see that you can specify the name and date of the file in the "data" argument. Maybe this argument could be extendend to support a "mode" like fs.createWriteStream.

Thank you.

[ctalkington]

i actually believe you can define permissions as part of the zip "external file attritubutes", however, its a bit fun due to bitmasks and such. if you calculate the proper information, you can set externalFileAttributes which isn't advertised but should pass through to underlying header API and write it as UInt32LE..

http://unix.stackexchange.com/a/14727

Tar also has an un-advertised mode that you should be able to pass things like 0777 to.

These extra data keys are available due to way header API works but wont be fully supported until the header API is extended to support them with a normalized helper. There is currently no ETA on that but def something that is going to happen sooner than later.

[gimenete]

Ok. I didn't know about that mode. But it's just what I was looking for. This worked like a charm

tar.append(data,{name:'run.sh', mode:0755}, callback)

Thank you Chris!

[ctalkington]

no problem. I recently had refactored the header api to be more in line with spec including tar filename prefix. all these formats have their own little gotchas and I learn more about them each day through this project.

[julianpoemp]

For anyone who faces this issue in 2023 using Typescript: You can add the file permissions for zip via mode attribute:

zip.append(content, {
  mode: 0o755
}

Before setting this extracted files on MacOS had read permissions only.