[PATCH] ci: run `make sparse` as a GitHub workflow

["Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>]

From: Johannes Schindelin <johannes.schindelin@gmx.de>

Occasionally we receive reviews after patches were integrated, where
`sparse` identified problems such as file-local variables or functions
being declared as global.

By running `sparse` as part of our Continuous Integration, we can catch
such things much earlier. Even better: developers who activated GitHub
Actions on their forks can catch such issues before even sending their
patches to the Git mailing list.

This addresses https://github.com/gitgitgadget/git/issues/345

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
    ci: run make sparse as a GitHub workflow
    
    One of the earliest open source static analyzers is called "sparse", and
    occasionally Ramsay Jones sends out mails on the Git mailing list that
    some function or other should be declared static because sparse found
    out that it is only used within the same file.
    
    Let's add a GitHub workflow running "make sparse".
    
    Example run: https://github.com/gitgitgadget/git/actions/runs/1026303823

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-994%2Fdscho%2Fci-enable-sparse-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-994/dscho/ci-enable-sparse-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/994

 .github/workflows/run-sparse.yml | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 .github/workflows/run-sparse.yml

diff --git a/.github/workflows/run-sparse.yml b/.github/workflows/run-sparse.yml
new file mode 100644
index 00000000000..25f6a6efb40
--- /dev/null
+++ b/.github/workflows/run-sparse.yml
@@ -0,0 +1,22 @@
+name: Run `sparse`
+
+on: [push, pull_request]
+
+jobs:
+  sparse:
+    runs-on: ubuntu-20.04
+    steps:
+    - name: Download the `sparse` package
+      uses: git-for-windows/get-azure-pipelines-artifact@v0
+      with:
+        repository: git/git
+        definitionId: 10
+        artifact: sparse-20.04
+    - name: Install the `sparse` package
+      run: sudo dpkg -i sparse-20.04/sparse_*.deb
+    - name: Install a couple of dependencies
+      run: |
+        sudo apt-get install -q -y libssl-dev libcurl4-openssl-dev libexpat-dev gettext zlib1g-dev
+    - uses: actions/checkout@v2
+    - name: make sparse
+      run: make sparse
\ No newline at end of file

base-commit: ebf3c04b262aa27fbb97f8a0156c2347fecafafb
-- 
gitgitgadget