ci: Update CI dependencies (#850)

* ci: Replace setup-ruby with use-ruby-action

* ci: Update python version

* ci: Update Ruby version

* Set ruby action to master

* Try installing mercurial earlier in the workflow

* Remove mercurial installation

* Remove mercurial installation on all OSes

* Revert "Remove mercurial installation on all OSes"

This reverts commit 0e1a3e7e928198ece34660494980f00102df8c45.

* Update hg installation comment

* Revert Ruby update

* Add caching

* Add caching to audit

* Update workflow.yml

* Only cache during test steps

1 files changed, 20 insertions, 7 deletions

diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index 459e9f4a2..202e7bf55 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -92,6 +92,23 @@ jobs:
       # Checkout the branch being tested
       - uses: actions/checkout@v2
 
+      # Cache files between builds
+      - name: Cache cargo registry
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/registry
+          key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
+      - name: Cache cargo index
+        uses: actions/cache@v1
+        with:
+          path: ~/.cargo/git
+          key: ${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}
+      - name: Cache cargo build
+        uses: actions/cache@v1
+        with:
+          path: target
+          key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
+
       # Install all the required dependencies for testing
       - uses: actions-rs/toolchain@v1
         with:
@@ -110,14 +127,14 @@ jobs:
           go-version: "1.12.1"
 
       # Install Ruby at a fixed version
-      - uses: actions/setup-ruby@v1
+      - uses: eregon/use-ruby-action@v1
         with:
           ruby-version: "2.6.3"
 
       # Install Python at a fixed version
       - uses: actions/setup-python@v1
         with:
-          python-version: "3.7.5"
+          python-version: "3.7.6"
 
       # Install dotnet at a fixed version
       - uses: actions/setup-dotnet@v1
@@ -129,16 +146,12 @@ jobs:
         with:
           php-version: "7.3"
 
-      # Install Mercurial (pre-installed on linux, installed from pip on macos
-      # and from choco on windows),
+      # Install Mercurial (pre-installed on Linux and windows)
       - name: Install Mercurial (macos)
         if: matrix.os == 'macOS-latest'
         env:
           HGPYTHON3: 1
         run: pip install mercurial
-      - name: Install Mercurial (windows)
-        if: matrix.os == 'windows-latest'
-        run: choco install hg
 
       # Install Terraform at a fixed version
       - uses: volcano-coffee-company/setup-terraform@v1