add needed dev requirements

.gitlab-ci.yml

@@ -1,18 +1,10 @@
-image: "python:3.7"
+image: "python:3.8"
 
 before_script:
   - python --version
   - pip install -r requirements.txt
-  - export TFVER=0.13.4
-  - export TFURL=https://releases.hashicorp.com/terraform/
-  - TFURL+=$TFVER
-  - TFURL+="/terraform_"
-  - TFURL+=$TFVER
-  - TFURL+="_linux_amd64.zip"
-  - wget $TFURL -O terraform_bin.zip
-  - mkdir tf_bin
-  - unzip terraform_bin.zip -d tf_bin
-
+  - pip install -r dev_requirements.txt
+  
 stages:
   - test
 
@@ -21,8 +13,16 @@ flake8:
   script:
   - flake8 --max-line-length=120 python_terraform/*.py
 
-
 pytest:
   stage: test
   script:
+  - export TFVER=0.13.4
+  - export TFURL=https://releases.hashicorp.com/terraform/
+  - TFURL+=$TFVER
+  - TFURL+="/terraform_"
+  - TFURL+=$TFVER
+  - TFURL+="_linux_amd64.zip"
+  - wget $TFURL -O terraform_bin.zip
+  - mkdir tf_bin
+  - unzip terraform_bin.zip -d tf_bin
   - PATH=$PATH:$PWD/tf_bin pytest -v

dev_requirements.txt

@@ -0,0 +1,11 @@
+coverage==5.3
+flake8==3.8.4
+flake8-polyfill==1.0.2
+mypy==0.790
+mypy-extensions==0.4.3
+pycodestyle==2.6.0
+pyflakes==2.2.0
+pylint==2.6.0
+pytest==6.1.2
+pytest-cov==2.10.1
+pytest-datafiles==2.0