Fix python command for updating GEF

[iAmG-r00t]

GEF+GDB version

gef➤  version 
GEF: (Standalone)
Blob Hash(/home/pwn-0-dev/.gef-2b72f5d0d9f0f218a91cd1ca5148e45923b950d5.py): 8dc57b700e3c1c85822449033a01c94dfae9e4a6
SHA256(/home/pwn-0-dev/.gef-2b72f5d0d9f0f218a91cd1ca5148e45923b950d5.py): 63d3e10d38a367c3e4d37de8e0701bcdff2a4e7c9a0a4ec5d83ccb8b2fe6188d
GDB: 12.1
GDB-Python: 3.10

Operating System

Ubuntu 22.04.1

Describe the issue you encountered

The command python3 ~/.gef-2b72f5d0d9f0f218a91cd1ca5148e45923b950d5.py --update for updating GEF brings the below error;

pwn-0-dev@ubuntu:~$ python3 ~/.gef-2b72f5d0d9f0f218a91cd1ca5148e45923b950d5.py --update
Traceback (most recent call last):
  File "/home/pwn-0-dev/.gef-2b72f5d0d9f0f218a91cd1ca5148e45923b950d5.py", line 117, in <module>
    import gdb  # type:ignore
ModuleNotFoundError: No module named 'gdb'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/pwn-0-dev/.gef-2b72f5d0d9f0f218a91cd1ca5148e45923b950d5.py", line 121, in <module>
    sys.exit(update_gef(sys.argv[2:]))
  File "/home/pwn-0-dev/.gef-2b72f5d0d9f0f218a91cd1ca5148e45923b950d5.py", line 103, in update_gef
    ver = "dev" if "--dev" in argv else GEF_DEFAULT_BRANCH
NameError: name 'GEF_DEFAULT_BRANCH' is not defined

This issue has been fixed in the GitHub repo but the download link for both curl and wget and retrieving un-updated file.

Do you read the docs and look at previously closed issues/PRs for similar cases?

Yes

Architecture impacted

• X86
• X64
• ARM
• ARM64
• MIPS
• MIPS64
• PPC
• PPC64
• RISCV

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Minimalist test case

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// compile with gcc -fPIE -pic -o my_issue.out my_issue.c
int main(){ return 0; }

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• If possible and useful, please upload the binary

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