Drop python2 support

.github/workflows/test.yml

@@ -31,7 +31,6 @@ jobs:
         python-version:
           # Available versions:
           # https://github.com/actions/python-versions/blob/main/versions-manifest.json
-          - "2.7.18"
           - "3.7"
           - "3.8"
           - "3.9"
@@ -50,8 +49,8 @@ jobs:
 
       - name: "Install dependencies"
         run: |
-          python -VV
-          python -m pip install -r requirements-dev.txt
+          python3 -VV
+          python3 -m pip install -r requirements-dev.txt
       - name: "Run tests"
         run: |
           make test

Dockerfile

@@ -3,7 +3,5 @@ FROM python:3-alpine3.15
 
 COPY requirements-dev.txt /tmp/
 
-RUN apk add --no-cache python2 bash git less make && \
-    python2 -m ensurepip && \
-    python2 -m pip install -r /tmp/requirements-dev.txt && \
+RUN apk add --no-cache bash git less make && \
     python3 -m pip install -r /tmp/requirements-dev.txt

Makefile

@@ -4,7 +4,7 @@ TESTPYPI = pypitest
 PYPI = pypi
 
 .PHONY: dogfood lint doc-check doc-preview clean build dist-test dist \
-	test test3 cov cov3 html reg reg3 profile profile3
+	test cov html reg profile
 
 dogfood:
 	./ydiff.py
@@ -24,40 +24,22 @@ doc-preview:
 
 test: lint doc-check cov reg
 
-test2: lint doc-check cov2 reg2
-
-test3: lint doc-check cov3 reg3
-
 cov:
 	coverage run tests/test_ydiff.py
 	coverage report --show-missing
 
-cov2:
-	python2 `which coverage` run tests/test_ydiff.py
-	python2 `which coverage` report --show-missing
-
-cov3:
-	python3 `which coverage` run tests/test_ydiff.py
-	python3 `which coverage` report --show-missing
-
 html:
 	coverage html
 	python -m webbrowser -n "file://$(shell pwd)/htmlcov/index.html"
 
 reg:
 	tests/regression.sh
 
-reg2:
-	PYTHON=python2 tests/regression.sh
-
-reg3:
-	PYTHON=python3 tests/regression.sh
-
 profile:
-	PYTHON=python3 tests/profile.sh tests/*/in.diff
+	tests/profile.sh tests/*/in.diff
 
 profile-difflib:
-	PYTHON=python3 tests/profile.sh tests/large-hunk/tao.diff
+	tests/profile.sh tests/large-hunk/tao.diff
 
 clean:
 	rm -f MANIFEST profile*.tmp* .coverage
@@ -76,7 +58,7 @@ dist: clean build
 
 docker-test:
 	docker run -v $(shell pwd):$(shell pwd) -w $(shell pwd) --rm \
-		ymattw/ydiff-dev make test2 test3
+		ymattw/ydiff-dev make test
 
 docker-image:
 	docker build -t ymattw/ydiff-dev .

setup.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
 from __future__ import with_statement

ydiff.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
 """