Add caching to CI test pipeline

.github/workflows/lint-and-test.yml

@@ -34,9 +34,20 @@ jobs:
         run: |
           git fetch --prune --unshallow
           git fetch --depth=1 origin +refs/tags/*:refs/tags/*
-      - run: ci/SETUP.sh
+      - uses: actions/cache@v2
+        id: cache
+        with:
+          path: ${{ env.pythonLocation }}
+          key: ${{ runner.os }}-pip-${{ env.pythonLocation }}-${{ hashFiles('**/requirements/**.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+      - run: |
+          ci/setup-postgres.sh
+          sudo apt-get -y install coinor-cbc
       - name: Install FlexMeasures & dependencies for tests
+        if: steps.cache.outputs.cache-hit != 'true'
         run: |
+          make install-pip-tools
           make install-for-test
           pip install coveralls
       - name: Run all tests except those marked to be skipped by GitHub

ci/Readme.md

@@ -1 +1,4 @@
 # Continuous integration
+
+Here are some useful script for CI.
+

ci/install-cbc.sh → ci/install-cbc-from-source.sh

@@ -1,5 +1,10 @@
 #!/bin/bash
 
+######################################################################
+# This script installs the Cbc solver from source
+# (for cases where you can't install the coinor-cbc package)
+######################################################################
+
 # Install to this dir
 SOFTWARE_DIR=/home/seita/software
 if [ "$1" != "" ]; then

ci/SETUP.sh → ci/setup-postgres.sh

@@ -1,19 +1,16 @@
 #!/bin/bash
 
 ######################################################################
-# This script sets up a new FlexMeasures instance in a CI environment
+# This script sets up a new Postgres instance in a CI environment
 ######################################################################
 
 
 # Install dependencies
-apt-get update
-sudo apt-get -y install postgresql-client coinor-cbc
-make install-deps
-
+sudo apt-get update
+sudo apt-get -y install postgresql-client
 
 # Wait for the DB service to be up.
 
-# Hack until this feature is ready: https://bitbucket.org/site/master/issues/15244/build-execution-should-wait-until-all
 statusFile=/tmp/postgres-status
 while [[ true ]]; do
   telnet $PGHOST $PGPORT &> ${statusFile}

documentation/tut/installation.rst

@@ -235,7 +235,7 @@ Installing Cbc can be done on Unix via:
 
 (also available in different popular package managers).
 
-We provide a script for installing from source (without requiring ``sudo`` rights) in :ref:`continuous_integration`.
+We provide a script for installing from source (without requiring ``sudo`` rights) in the `ci` folder.
 
 More information (e.g. for installing on Windows) on `the Cbc website <https://projects.coin-or.org/Cbc>`_.