Merge pull request #124 from hvr/pr/issue-123

Improve Makefile

.travis.yml

@@ -21,8 +21,4 @@ install:
 
 script:
  - make sdist
- - cd dist
- - tar xvzf alex-*.tar.gz
- - cd alex-*/
- - "echo 'packages: .' > cabal.project"
- - cabal new-test --enable-tests
+ - make sdist-test-only

Makefile

@@ -1,19 +1,47 @@
+CABAL = cabal
+
 HAPPY = happy 
 HAPPY_OPTS = -agc
 
 ALEX = alex
 ALEX_OPTS = -g
+ALEX_VER = `awk '/^version:/ { print $$2 }' alex.cabal`
 
 sdist ::
+	@case "`$(CABAL) --numeric-version`" in \
+		2.[2-9].* | [3-9].* ) ;; \
+		* ) echo "Error: needs cabal 2.2.0.0 or later (but got : `$(CABAL) --numeric-version`)" ; exit 1 ;; \
+	esac
 	@if [ "`git status -s`" != '' ]; then \
-		echo Tree is not clean; \
+		echo "Error: Tree is not clean"; \
 		exit 1; \
 	fi
+	rm -rf dist/
 	$(HAPPY) $(HAPPY_OPTS) src/Parser.y -o src/Parser.hs
 	$(ALEX) $(ALEX_OPTS) src/Scan.x -o src/Scan.hs
 	mv src/Parser.y src/Parser.y.boot
 	mv src/Scan.x src/Scan.x.boot
-	cabal new-run gen-alex-sdist
-	cabal sdist
+	$(CABAL) new-run gen-alex-sdist
+	$(CABAL) sdist
+	@if [ ! -f "dist/alex-$(ALEX_VER).tar.gz" ]; then \
+		echo "Error: source tarball not found: dist/alex-$(ALEX_VER).tar.gz"; \
+		exit 1; \
+	fi
 	git checkout .
 	git clean -f
+
+sdist-test :: sdist sdist-test-only
+	@rm -rf "dist/alex-$(ALEX_VER)/"
+
+sdist-test-only ::
+	@if [ ! -f "dist/alex-$(ALEX_VER).tar.gz" ]; then \
+		echo "Error: source tarball not found: dist/alex-$(ALEX_VER).tar.gz"; \
+		exit 1; \
+	fi
+	rm -rf "dist/alex-$(ALEX_VER)/"
+	tar -xf "dist/alex-$(ALEX_VER).tar.gz" -C dist/
+	echo "packages: ." > "dist/alex-$(ALEX_VER)/cabal.project"
+	cd "dist/alex-$(ALEX_VER)/" && cabal new-test --enable-tests all
+	@echo ""
+	@echo "Success! dist/alex-$(ALEX_VER).tar.gz is ready for distribution!"
+	@echo ""

README.md

@@ -78,6 +78,9 @@ new-run gen-alex-sdist` pre-preprocessing step):
     $ make sdist
     $ cabal install dist/alex-*.tar.gz
 
+For convenience, there's also a `make sdist-test` target which builds the
+source source tarball and runs the test-suite from within the source dist.
+
 ## Contributing & Reporting Issues
 
 Please report any bugs or comments at  https://github.com/simonmar/alex/issues