Extract all, but ignore top folder?

[J. Scott Elblein]

Let's see if I can explain this properly ...

When you download most releases from GitHub in .zip format, the contents will look something like this:

SomeProject_1.2.3.4 <top folder> <--- ignore
    - <some folder> <--- extract everything from here on down ---->
    - <some folder>
    - <some folder>
    - <some folder>
    - <bunch of files below this>

I want to extract everything under that top folder, but not create that top folder when extracted. So, for example, I could make a folder named "blah", and 7z would extract just the contents under that top folder, to the "blah" folder.

Is there a cline switch that does this?

TIA

[mathlete]

I just found out that tar is now available on Windows. For the setup I outlined below, the following works as desired:

mkdir test
tar -xf folder.tar --strip-components=1 -C test

This works on .zip too. In fact, it also works on .tar.gz.

[Igor Pavlov]

There is no switch now.
But you can extract folder with full path and then move it with os shell command.

[mathlete]

I'm trying to do the same thing with .tar files, and I can get halfway there with the following:

7z x folder.tar -t* -otest

The problem is that <top folder> still appears in test (files included), even when I do the following:

7z x folder.tar -t* -spe -otest

Interestingly, -t* does nothing for .zip files: <top folder> is the only thing created in test.
@ipavlov are these bugs?

[Igor Pavlov]

-spe eliminates top folder if it has same name as name of archive.

[mathlete]

Thanks for the clarification, but unfortunately, renaming folder.tar to topFolder.tar does not help (even if I rebuild the .tar instead of simply renaming it).

In fact, I'm now finding that -t* no longer brings up the content of topFolder, even when I switch back to folder.tar - topFolder is now the only object in test no matter what I do.

[Igor Pavlov]

-t* is not related to tar at all.
-t* allows to open top level format from vmdk or vhd instead of default smart nested archive open operation.

-spe is working with -oname switch.
If root folder in archive has same name as last part name in -opath\name switch, it will remove that root dir part.
So you will have no duplication name\name\ in extrated paths.
It's common case in 7-zip usage.
You have folder name with files.
You select that folder and create name.tar from that foder.
And then you extract name.tar no default name path (that uses -oname switch).
So we needed that eliminate feature (-spe) to eliminate that duplication of name for that most common case.