add new requirements-dev file and Make init command

Author: adrn

.github/workflows/build.yml

@@ -25,8 +25,7 @@ jobs:
         run: |
           sudo apt-get install pandoc
           python -m pip install -U pip
-          python -m pip install -r requirements.txt
-          python -m pip install git+https://github.com/astropy/nbcollection
+          python -m pip install -r requirements-dev.txt
 
       - name: Execute the notebooks
         run: |

.github/workflows/prs.yml

@@ -29,9 +29,7 @@ jobs:
         run: |
           sudo apt-get install pandoc
           python -m pip install -U pip
-          python -m pip install -r requirements.txt
-          python -m pip install gitpython
-          python -m pip install git+https://github.com/astropy/nbcollection
+          python -m pip install -r requirements-dev.txt
 
       # Run all tutorials if the label is present
       - name: Run all tutorials

Makefile

@@ -6,6 +6,10 @@ MODIFIED := $(shell python .github/get_modified_tutorials.py --main-branch $(TUT
 FLAGS = --flatten --build-path=. -v
 CONVERTFLAGS = --make-index --preprocessors=nbconvert.preprocessors.ExtractOutputPreprocessor --index-template=templates/index.tpl
 
+init:
+	python -m pip install -U -r requirements-dev.txt
+	pre-commit install
+
 build: envcheck execute convert
 buildall: envcheck executeall convertall
 
@@ -27,4 +31,4 @@ convertall:
 clean:
 	rm -rf _build
 
-.PHONY: all clean execute convert executeall convertall build buildall
+.PHONY: init all clean execute convert executeall convertall build buildall

requirements-dev.txt

@@ -0,0 +1,4 @@
+-r requirements.txt
+gitpython
+git+https://github.com/astropy/nbcollection
+pre-commit