[CI] Some improvements to GitHub Actions (#145)

* Use `julia-actions/cache` in more places
* make building the docs more colourful
* run CI jobs only when necessary

Author: giordano

.github/workflows/CI.yml

@@ -1,10 +1,24 @@
 name: CI
+
 on:
   pull_request:
+    paths:
+      - '.github/workflows/CI.yml'
+      - 'ext/**'
+      - 'src/**'
+      - 'test/**'
+      - 'Project.toml'
   push:
     branches:
       - master
     tags: '*'
+    paths:
+      - '.github/workflows/CI.yml'
+      - 'ext/**'
+      - 'src/**'
+      - 'test/**'
+      - 'Project.toml'
+
 jobs:
   test:
     name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}

.github/workflows/Documenter.yml

@@ -1,9 +1,20 @@
 name: Documenter
+
 on:
   push:
     branches: [master]
     tags: [v*]
+    paths:
+      - '.github/workflows/Documenter.yml'
+      - 'docs/**'
+      - 'src/**'
+      - 'Project.toml'
   pull_request:
+    paths:
+      - '.github/workflows/Documenter.yml'
+      - 'docs/**'
+      - 'src/**'
+      - 'Project.toml'
 
 concurrency:
   # Skip intermediate builds: always.
@@ -34,6 +45,6 @@ jobs:
           Pkg.develop(PackageSpec(path=pwd()))
           Pkg.instantiate()
       - uses: julia-actions/julia-buildpkg@v1
-      - run: julia --project=docs docs/make.jl
+      - run: julia --project=docs --color=yes docs/make.jl
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/IntegrationTest.yml

@@ -2,10 +2,20 @@ name: IntegrationTest
 
 on:
   pull_request:
+    paths:
+      - '.github/workflows/IntegrationTest.yml'
+      - 'ext/**'
+      - 'src/**'
+      - 'Project.toml'
   push:
     branches:
       - master
     tags: '*'
+    paths:
+      - '.github/workflows/IntegrationTest.yml'
+      - 'ext/**'
+      - 'src/**'
+      - 'Project.toml'
 
 jobs:
   test:
@@ -25,14 +35,15 @@ jobs:
         with:
           version: ${{ matrix.julia-version }}
           arch: x64
+      - uses: julia-actions/cache@v2
       - uses: julia-actions/julia-buildpkg@v1
       - name: Clone Downstream
         uses: actions/checkout@v5
         with:
           repository: ${{ matrix.package.user }}/${{ matrix.package.repo }}
           path: downstream
       - name: Load this and run the downstream tests
-        shell: julia --project=downstream {0}
+        shell: julia --color=yes --project=downstream {0}
         run: |
           using Pkg
           try

.github/workflows/Invalidations.yml

@@ -2,6 +2,11 @@ name: Invalidations
 
 on:
   pull_request:
+    paths:
+      - '.github/workflows/Invalidations.yml'
+      - 'ext/**'
+      - 'src/**'
+      - 'Project.toml'
 
 concurrency:
   # Skip intermediate builds: always.
@@ -19,6 +24,7 @@ jobs:
     - uses: julia-actions/setup-julia@v2
       with:
         version: '1'
+    - uses: julia-actions/cache@v2
     - uses: actions/checkout@v5
     - uses: julia-actions/julia-buildpkg@v1
     - uses: julia-actions/julia-invalidations@v1