setup coverage (#1144)

Author: KristofferC

.buildkite/runtests.yml

@@ -29,6 +29,8 @@ steps:
       # Julia installation outside the sandbox
       - JuliaCI/julia#v1:
           version: '1.10'
+      - JuliaCI/julia-coverage#v1:
+          codecov: true
       - staticfloat/sandbox#v2:
           rootfs_url: https://github.com/JuliaCI/rootfs-images/releases/download/v6.00/package_linux.x86_64.tar.gz
           rootfs_treehash: "4dcde853eb5baaa0a8f087b633eaf955dc94b5dc"
@@ -38,8 +40,8 @@ steps:
       - JuliaCI/julia#v1:
           version: "nightly"
     command: |
-      julia --color=yes --project=.ci -e 'using Pkg; Pkg.instantiate()'
-      julia --color=yes --project=.ci .ci/create_sysimage_and_run_tests.jl
+      julia --color=yes --project=.ci --code-coverage=@ -e 'using Pkg; Pkg.instantiate()'
+      julia --color=yes --project=.ci --code-coverage=@ .ci/create_sysimage_and_run_tests.jl
     agents:
       queue: "julia"
       os: "linux"
@@ -50,9 +52,11 @@ steps:
     plugins:
       - JuliaCI/julia#v1:
           version: "nightly"
+      - JuliaCI/julia-coverage#v1:
+          codecov: true
     command: |
-      julia --color=yes --project=.ci -e 'using Pkg; Pkg.instantiate()'
-      julia --color=yes --project=.ci .ci/create_sysimage_and_run_tests.jl
+      julia --color=yes --project=.ci --code-coverage=@ -e 'using Pkg; Pkg.instantiate()'
+      julia --color=yes --project=.ci --code-coverage=@ .ci/create_sysimage_and_run_tests.jl
     agents:
       queue: "julia"
       os: "macos"
@@ -62,9 +66,11 @@ steps:
     plugins:
       - JuliaCI/julia#v1:
           version: "nightly"
+      - JuliaCI/julia-coverage#v1:
+          codecov: true
     command: |
-      julia --color=yes --project=.ci -e 'using Pkg; Pkg.instantiate()'
-      julia --color=yes --project=.ci .ci/create_sysimage_and_run_tests.jl
+      julia --color=yes --project=.ci --code-coverage=@ -e 'using Pkg; Pkg.instantiate()'
+      julia --color=yes --project=.ci --code-coverage=@ .ci/create_sysimage_and_run_tests.jl
     agents:
       queue: "julia"
       os: "windows"

.codecov.yml

@@ -0,0 +1,8 @@
+coverage:
+  status:
+    patch:
+      default:
+        only_pulls: true # Only show the `codecov/patch` commit status on pull requests.
+    project:
+      default:
+        only_pulls: true # Only show the `codecov/project` commit status on pull requests.

README.md

@@ -4,6 +4,13 @@ This package is part of the Julia standard library (stdlib).
 
 `LinearAlgebra.jl` provides functionality for performing linear algebra operations in Julia.
 
+| **Build Status**                    | **Coverage**                    |
+|:-------------------------------:|:-------------------------------:|
+[![Build status](https://badge.buildkite.com/4032f509b3a7354c8ce7b34b98c7496d66adc4504b0101cbcf.svg?branch=master)](https://buildkite.com/julialang/linearalgebra-dot-jl) | [![][codecov-img]][codecov-url] |
+
+[codecov-img]: https://codecov.io/gh/JuliaLang/LinearAlgebra.jl/branch/master/graph/badge.svg
+[codecov-url]: https://codecov.io/gh/JuliaLang/LinearAlgebra.jl
+
 ## Migrating a Pull Request (PR) from the Julia repository to this repository
 
 Since this package was split out from the main Julia repository, you might have previously made a pull request (PR) to the Julia repo. You can easily migrate such PRs to this repository using the following steps: