How to get version from apk name in github release?

[SubhashBose]

I have multiple apks in each github release, like this name format

AppA-11.22.33-name.apk
AppB-45.66.77-name.apk

Everything works fine, I can get the latest release, filter 'AppA' to get the correct apk. But I can not get the app version from it. I expect regex for version [0-9]+\.[0-9]+\.[0-9]+ to match, but it does not. It seems regex only applied to url/release-tag, but not on apk name. How can I apply regex on apk name to extract the version?

Thanks

[wodin]

Try this:

Specify the version regex as something like this:

-([0-9.]+)-

and then specify the "Match group" as $1

I think that should work

[MarkyMarkDE]

Try this:

Specify the version regex as something like this:

-([0-9.]+)-

and then specify the "Match group" as $1

I think that should work

maybe better: -([0-9\.]+)- meta chars like "." should being escaped ("\") and match them literally to prevent RegEx parsing confusions with match previous tokens 😉

[wodin]

maybe better: -([0-9\.]+)- meta chars like "." should being escaped ("\") and match them literally to prevent RegEx parsing confusions with match previous tokens 😉

Yes, normally you need to escape them, except not when the . is inside []:

Using the following test program, my pattern does match the example string:

void main() {
  String apkString = 'AppA-11.22.33-name.apk';
  RegExp exp = RegExp(r'-([0-9.]+)-');
  RegExpMatch? match = exp.firstMatch(apkString);
  if (match != null) {
    print(match[1]);
  } else {
    print('No match!');
  }
}

This correctly outputs: 11.22.33.

Assuming you're right, then the following pattern should also match (but would match other things we don't want to match as well):

  RegExp exp = RegExp(r'-([.]+)-');

But it outputs: No match!

Also, assuming you're right, the following should also match (and print xxx):

  String apkString = 'AppA-xxx-name.apk';
  RegExp exp = RegExp(r'-([0-9.]+)-');

But again it outputs: No match!

Of course, if we did it this way with the dot outside of the [], then we would need to escape it:

  RegExp exp = RegExp(r'-(([0-9]|\.)+)-');

Your pattern works too, but the backslash is not actually necessary.

[MarkyMarkDE]

maybe better: -([0-9\.]+)- meta chars like "." should being escaped ("") and match them literally to prevent RegEx parsing confusions with match previous tokens 😉

Yes, normally you need to escape them, except not when the . is inside []:

Using the following test program, my pattern does match the example string:

void main() {
  String apkString = 'AppA-11.22.33-name.apk';
  RegExp exp = RegExp(r'-([0-9.]+)-');
  RegExpMatch? match = exp.firstMatch(apkString);
  if (match != null) {
    print(match[1]);
  } else {
    print('No match!');
  }
}

This correctly outputs: 11.22.33.

Assuming you're right, then the following pattern should also match (but would match other things we don't want to match as well):

  RegExp exp = RegExp(r'-([.]+)-');

But it outputs: No match!

Also, assuming you're right, the following should also match (and print xxx):

  String apkString = 'AppA-xxx-name.apk';
  RegExp exp = RegExp(r'-([0-9.]+)-');

But again it outputs: No match!

Of course, if we did it this way with the dot outside of the [], then we would need to escape it:

  RegExp exp = RegExp(r'-(([0-9]|\.)+)-');

Your pattern works too, but the backslash is not actually necessary.

ahh okay, thank you so much 👍, it seems my answer was to "globally" 😉.

[SubhashBose]

Thank you all for your replies. But the issue is not regex pattern here. I tried almost all possible regex patterns to match versions, nothing worked.
The problem is Obtainium does not match any regex pattern (for version) on apk name when the source is github. I think for github source Obtainium is using ONLY the release tag/name as the string for version regex match, not the file download URLs or APK names, so regex never matches the version from APK name. Finally I gave up on this, and ended up using github API's json output as HTML source (not Github repo as source) in Obtainium. Then it nicely matches the Regex patterns I supplied.

I am not sure this should be reported as a bug or not. But definitely not an expected behavior, also bit disappointed that Obtainium can not get version number from apk names in gibhub release. If anyone has been able to do it somehow, please let me know.

[wodin]

Did you have "Use release title as version string" enabled?

I have an app installed from a (private) GitHub repository where I have "Use release title as version string" disabled, and I use the following as a regex:

v(\d+\.\d+\.\d+)

But in my case, that would match both the release and the APK link/name, so I can't tell for sure which it's using. Given that I have disabled the above option, I would hope it's using the APK link/name for the version.

Actually, I've just changed the regex to v(\d+\.\d+\.\d+)\.apk and then it gives me an error about not being able to detect the version! So it seems it is not getting it from the APK name/link. 🤔

OK, I think I see what's going on, if I understand the code correctly (I have very little experience with Dart).
It seems that the setting mentioned above allows you to choose between using the release name or not for the version.
If you turn that off, then it tries the tag name associated with the release. If there's no tag associated with the release, only then does it seem to look at the APK's name.

There does not appear to be an option to tell it to choose between the tag and the APK name. So if there is a tag, there seems to be no way to force it to use the APK name instead.

Perhaps @ImranR98 would consider adding an option for this or maybe switching to the HTML app source, like you did, is the answer.

[SubhashBose]

Thanks for confirming the issue. I had "Use release title as version string" disabled (which is default).
As you said, I also think that for version matching it uses tag-name by default, if that option turned on, then it will use release-name instead. As far I know, it is not possible to create github release without a tag. So, Obtainium never uses APK name/url for version matching.

It would be nice to have an option to use APK name for version matching, which I think will have many use cases. Currently it assumes that all APKs in a single release must have same version number.

[notrohit1702]

Thanks for confirming the issue. I had "Use release title as version string" disabled (which is default). As you said, I also think that for version matching it uses tag-name by default, if that option turned on, then it will use release-name instead. As far I know, it is not possible to create github release without a tag. So, Obtainium never uses APK name/url for version matching.

It would be nice to have an option to use APK name for version matching, which I think will have many use cases. Currently it assumes that all APKs in a single release must have same version number.

I would love this feature too! I was looking for answers because I had a similar problem