git-svn Can't locate SVN/Core.pm after fresh installation of macOS Catalina 10.15.4 - macos

Question

Recently I reinstalled macOS Catalina 10.15.4. After I installed Command_Line_Tools_11.4.1, it told me svn is no longer working with Xcode. Then I installed both git and svn by brew, hopefully git-svn would work. Unfortunately got this error message:
Can't locate SVN/Core.pm in #INC (you may need to install the SVN::Core module) (#INC contains: /usr/local/Cellar/git/2.26.2/share/perl5 /Applications/Xcode.app/Contents/Developer/Library/Perl/5.18/darwin-thread-multi-2level /Library/Developer/CommandLineTools/Library/Perl/5.18/darwin-thread-multi-2level /Library/Perl/5.18/darwin-thread-multi-2level /Library/Perl/5.18 /Network/Library/Perl/5.18/darwin-thread-multi-2level /Network/Library/Perl/5.18 /Library/Perl/Updates/5.18.4 /System/Library/Perl/5.18/darwin-thread-multi-2level /System/Library/Perl/5.18 /System/Library/Perl/Extras/5.18/darwin-thread-multi-2level /System/Library/Perl/Extras/5.18 .) at /usr/local/Cellar/git/2.26.2/share/perl5/Git/SVN/Utils.pm line 6.
Both git & svn are the latest version.
Please help me out.

Answer 1

Finally I figure it out!!!
Open the git-svn file (perl script, in my case file location is /usr/local/opt/git/libexec/git-core/git-svn), change the first line #!/usr/bin/perl to #!/usr/local/bin/perl
And it works!
I guess system perl doesn't include perl SVN/Core, but brew perl has it (dependency of brew svn).

Answer 2

Solution for MacOS Big Sur 11.5
After struggling with this error for hours:
Can't locate SVN/Core.pm in #INC (you may need to install the SVN::Core module)
I've finally found a solution that actually works.
If you run:
brew reinstall subversion
It will print a message like this:
The perl bindings are located in various subdirectories of:
/usr/local/opt/subversion/lib/perl5
Then you just need to run this command before using git svn to load the SVN module from the correct path:
export PERL5LIB=/usr/local/opt/subversion/lib/perl5/site_perl/5.30.2/darwin-thread-multi-2level

Answer 3

Solution for those, who, like me - want to use Sourcetree client on macOS Catalina with git-svn:
First step:
brew install git
brew install perl
brew install subversion
edit
/usr/local/Cellar/git/git_version/libexec/git-core/git-svn
replace
#!/usr/bin/perl
with
#!/usr/local/bin/perl
Second step, install missed perl modules:
cpan SVN::Core
cpan Term::ReadKey
Third step, configure SourceTree:
In Sourcetree->Preferences - set option "use system git", from:
/usr/local/Cellar/git/git_version/git

Answer 4

While not a permanent fix, a workaround is to set ${GITPERLLIB}:
$ export GITPERLLIB=/usr/local/Cellar/git/2.31.1/share/perl5:/usr/local/lib/perl5/site_perl/5.28.2/darwin-thread-multi-2level
$ git svn clone svn+ssh://...
worked for me without editing any scripts installed by brew.

Answer 5

Ensure you've installed Perl, Subversion and dependencies via Homebrew:
brew install perl subversion apr apr-util
Install required Perl modules into ~/perl5:
export PATH="/usr/local/opt/apr/bin:/usr/local/opt/apr-util/bin:$PATH"
PERL_MM_OPT="INSTALL_BASE=$HOME/perl5" cpan local::lib Git::SVN SVN::Core
Verify installed modules by:
PERL5LIB="$HOME/perl5" cpan -l | grep SVN
Then configure Perl as following (based on brew info perl steps):
eval "$(perl -I$HOME/perl5/lib/perl5 -Mlocal::lib=$HOME/perl5)"
Finally run Git's SVN:
PERLLIB="$HOME/perl5" git svn clone https://svn.somecode.example.com/svn/trunk
If you're still stuck, try GitHub and GitLab websites which offer migration with a Git/SVN.
E.g. in GitHub, create a new repository, then import the project by pasting old repository’s clone URL.

Answer 6

The error message says:
$ git svn --version
Can't locate SVN/Core.pm in #INC (you may need to install the SVN::Core module) (#INC contains: /usr/local/opt/subversion/lib/perl5 /usr/local/Cellar/git/2.31.1/share/perl5 /Applications/Xcode.app/Contents/Developer/Library/Perl/5.28/darwin-thread-multi-2level /Library/Developer/CommandLineTools/Library/Perl/5.28/darwin-thread-multi-2level /Library/Perl/5.30/darwin-thread-multi-2level /Library/Perl/5.30 /Network/Library/Perl/5.30/darwin-thread-multi-2level /Network/Library/Perl/5.30 /Library/Perl/Updates/5.30.2 /System/Library/Perl/5.30/darwin-thread-multi-2level /System/Library/Perl/5.30 /System/Library/Perl/Extras/5.30/darwin-thread-multi-2level /System/Library/Perl/Extras/5.30) at /usr/local/Cellar/git/2.31.1/share/perl5/Git/SVN/Utils.pm line 6.
BEGIN failed--compilation aborted at /usr/local/Cellar/git/2.31.1/share/perl5/Git/SVN/Utils.pm line 6.
Compilation failed in require at /usr/local/Cellar/git/2.31.1/share/perl5/Git/SVN.pm line 25.
BEGIN failed--compilation aborted at /usr/local/Cellar/git/2.31.1/share/perl5/Git/SVN.pm line 32.
Compilation failed in require at /usr/local/Cellar/git/2.31.1/libexec/git-core/git-svn line 23.
BEGIN failed--compilation aborted at /usr/local/Cellar/git/2.31.1/libexec/git-core/git-svn line 23.
This is because git-svn is implemented by Perl, it needs a Perl library called SVN::Core to run。
Changing the first line of git-svn script from #!/usr/bin/perl to #!/usr/local/bin/perl won't fix this error!!! Because this just changes the Perl library from system default version to brew installed version。If the brew installed version doesn't contains SVN::Core, it'll still fail:
$ git svn --version
Can't locate SVN/Core.pm in #INC (you may need to install the SVN::Core module) (#INC contains: /usr/local/Cellar/git/2.31.1/share/perl5 /Applications/Xcode.app/Contents/Developer/Library/Perl/5.28/darwin-thread-multi-2level /Library/Developer/CommandLineTools/Library/Perl/5.28/darwin-thread-multi-2level /usr/local/Cellar/perl/5.34.0/lib/perl5/site_perl/5.34.0/darwin-thread-multi-2level /usr/local/Cellar/perl/5.34.0/lib/perl5/site_perl/5.34.0 /usr/local/Cellar/perl/5.34.0/lib/perl5/5.34.0/darwin-thread-multi-2level /usr/local/Cellar/perl/5.34.0/lib/perl5/5.34.0 /usr/local/lib/perl5/site_perl/5.34.0/darwin-thread-multi-2level /usr/local/lib/perl5/site_perl/5.34.0) at /usr/local/Cellar/git/2.31.1/share/perl5/Git/SVN/Utils.pm line 6.
BEGIN failed--compilation aborted at /usr/local/Cellar/git/2.31.1/share/perl5/Git/SVN/Utils.pm line 6.
Compilation failed in require at /usr/local/Cellar/git/2.31.1/share/perl5/Git/SVN.pm line 25.
BEGIN failed--compilation aborted at /usr/local/Cellar/git/2.31.1/share/perl5/Git/SVN.pm line 32.
Compilation failed in require at /usr/local/Cellar/git/2.31.1/libexec/git-core/git-svn line 23.
BEGIN failed--compilation aborted at /usr/local/Cellar/git/2.31.1/libexec/git-core/git-svn line 23.
Note that the Perl version has been changed, but the error still exists. Because there is no SVN:Core in the directories indicated by #INC.
Now some answers may tell you to install SVN::Core by cpan SVN::Core, Don't do that!!! This won't solve the problem! Because the version of SVN::Core it installed, may not match with your SVN version:
$ git svn --version
error: git-svn died of signal 11
By the way, cpan is rubbish, don't use it to install anything. It compiles the source before installation but cannot control the compile flags/options, and it cannot uninstall things that are installed by itself.
Here is the right solution:
The corresponding Perl libraries are already installed when you installed svn, and brew has already told you:
$ brew info svn
subversion: stable 1.14.1 (bottled), HEAD
Version control system designed to be a better CVS
https://subversion.apache.org/
/usr/local/Cellar/subversion/1.14.1_2 (234 files, 32.1MB) *
Poured from bottle on 2021-06-02 at 15:52:30
From: https://mirrors.ustc.edu.cn/homebrew-core.git/Formula/subversion.rb
License: Apache-2.0
==> Dependencies
Build: openjdk ✘, pkg-config ✘, python#3.9 ✔, scons ✘, swig ✘
Required: apr ✔, apr-util ✔, gettext ✔, lz4 ✔, openssl#1.1 ✔, utf8proc ✔
==> Options
--HEAD
Install HEAD version
==> Caveats
svntools have been installed to:
/usr/local/opt/subversion/libexec
The perl bindings are located in various subdirectories of:
/usr/local/opt/subversion/lib/perl5
You may need to link the Java bindings into the Java Extensions folder:
sudo mkdir -p /Library/Java/Extensions
sudo ln -s /usr/local/lib/libsvnjavahl-1.dylib /Library/Java/Extensions/libsvnjavahl-1.dylib
==> Analytics
install: 33,749 (30 days), 67,978 (90 days), 239,148 (365 days)
install-on-request: 33,129 (30 days), 67,011 (90 days), 229,097 (365 days)
build-error: 0 (30 days)
We can see that the Perl bindings are located in /usr/local/opt/subversion/lib/perl5, we just need to let git-svn use this path. With a little investigation of git-svn script, we can see this behavior is controlled by an environment variable called GITPERLLIB:
$ head /usr/local/Cellar/git/2.31.1/libexec/git-core/git-svn
#!/usr/bin/perl
use lib (split(/:/, $ENV{GITPERLLIB} || '/usr/local/Cellar/git/2.31.1/share/perl5:/Applications/Xcode.app/Contents/Developer/Library/Perl/5.28/darwin-thread-multi-2level:/Library/Developer/CommandLineTools/Library/Perl/5.28/darwin-thread-multi-2level'));
# Copyright (C) 2006, Eric Wong <normalperson#yhbt.net>
# License: GPL v2 or later
So the right way to solve this problem is to add the following code to your bashrc or zshrc:
export GITPERLLIB=/usr/local/opt/subversion/lib/perl5/site_perl/$<your_perl_version>/darwin-thread-multi-2level
Problem solved!