I'm seeing an unexpected change in behavior of git sparse-checkout between 2.26.2 and 2.27.0 on CentOS 7.8. Problem manifests with both github and multiple recent versions of gitlab. Sources came from https://mirrors.edge.kernel.org/pub/software/scm/git/, I verified the sha256 hashes for both 2.26.2 and 2.27.0 matched. Built with gcc (GCC) 8.3.1 20190311 (Red Hat 8.3.1-3) By doing: ./configure \ --prefix=/usr/local \ --with-python=python3 make -j 10 sudo make -j 10 install install-doc install-html Problem detail: In 2.26.2, git sparse-checkout commands... init --cone set add ... all bring in files. In 2.27.0, no files appear except the .git subdir until I do: git read-tree -mu HEAD However, according to my reading of this, git read-tree should not be necessary in 2.27.0: https://stackoverflow.com/questions/28760940/why-does-one-call-git-read-tree-after-a-sparse-checkout/ When I do export GIT_TRACE_PACKET=1, I see that the init --cone, set and add sparse-checkout commands all talk to the server. In 2.27.0, these commands do not result in any packets sent to the server. It sounds like they should be calling update_sparsity() themselves, but aren't. Is that wrong? I couldn't find a git CLI client command to invoke it directly except for read-tree. Below is a small bash script and its output that shows the problem with a small random public repo on github. Best regards, Shaun Script: ============================================== #!/bin/bash -x export GIT_TRACE_PACKET=0 git --version git clone --filter=blob:none --no-checkout https://github.com/r-spacex/launch-timeline.git cd launch-timeline # Note no server traffic at from here... export GIT_TRACE_PACKET=1 git sparse-checkout init --cone git sparse-checkout set README.md git sparse-checkout add css # ... to here. # There is nothing here yet except .git/ ls -las # This brings in the files as expected, uncomment to verify. # git read-tree -mu HEAD ============================================== Output: ============================================== 3sc3396:/tmp>demo-git-sparse-checkout-bug.sh + export GIT_TRACE_PACKET=0 + GIT_TRACE_PACKET=0 + git --version git version 2.27.0 + git clone --filter=blob:none --no-checkout https://github.com/r-spacex/launch-timeline.git Cloning into 'launch-timeline'... remote: Enumerating objects: 529, done. remote: Total 529 (delta 0), reused 0 (delta 0), pack-reused 529 Receiving objects: 100% (529/529), 67.49 KiB | 987.00 KiB/s, done. Resolving deltas: 100% (168/168), done. + cd launch-timeline + export GIT_TRACE_PACKET=1 + GIT_TRACE_PACKET=1 + git sparse-checkout init --cone + git sparse-checkout set README.md + git sparse-checkout add css + ls -las total 68 4 drwxrwxr-x 3 scase scase 4096 Jun 2 17:46 . 60 drwxrwxrwt. 34 root root 57344 Jun 2 17:46 .. 4 drwxrwxr-x 8 scase scase 4096 Jun 2 17:46 .git ==============================================
