media-libs/dr_wav: standardise dr_* lib ebuilds

- Respect user LDFLAGS variable where applicable.
- Pre-compile tests in src_compile and run them in src_test.
- Extract documentation from header and provide it in dedicated files
  in FILESDIR

Signed-off-by: Lucio Sauer <watermanpaint@posteo.net>

media-libs/dr_wav/Manifest

@@ -1,3 +1,2 @@
-DIST dr_wav-0.13.32-README.md 1243 BLAKE2B 5b22e00252f4307b5407b2b7cdbc237fa60975f86b9151f5a8eeea8faa1e81d1eec15a22a1952d1440a1f0b76b1e59782a30eb38473cab978a47fcfa391c8a9a SHA512 661529e69639367920276c5f6ff425fdd176ac8a7475212a1c1e1e2ccdbdf076f1a26eae1a1913f98da0d9e1c6ca04a48e0de69f3c681b1a7574674d7015bbb6
-DIST dr_wav-0.13.32.gh.h 351384 BLAKE2B 2bcbeab7e7aa6a7519bea978742494205625a60b8c0a464305c6f6fb7eec33be54640fdb2578437c4143e50e5ad2d18730351ecdd824d25ab6e0f8af3b8d018c SHA512 a4a681546716b1a1a9e55321796828828b1872bf223c7c02529a1553b8beafe2a89ffe72a38e5aa3bf457a8ce4dd2dcf9cba7a9cde28e59586a8388f1439a8a1
 DIST dr_wav-0.13.32.gh.tar.gz 518394 BLAKE2B 49447a2b845f95e9896fb45ac2cd9de8f59d45d3271e30e26c0e519355c3578b96f2c2978677d2774c1bfa4656a8213eafda00207cdd89f72d6823cf0f1b77cf SHA512 34126c8eb65f0735b77f058db9f1618b3c4e820698804b47f7a629c47df571e9cbbeefd4cce193409ebd715d37ed5faf1c3c27a7240e0f5418089cffe853f1ea
+DIST dr_wav-0.13.32.h 351384 BLAKE2B 2bcbeab7e7aa6a7519bea978742494205625a60b8c0a464305c6f6fb7eec33be54640fdb2578437c4143e50e5ad2d18730351ecdd824d25ab6e0f8af3b8d018c SHA512 a4a681546716b1a1a9e55321796828828b1872bf223c7c02529a1553b8beafe2a89ffe72a38e5aa3bf457a8ce4dd2dcf9cba7a9cde28e59586a8388f1439a8a1

media-libs/dr_wav/dr_wav-0.13.32.ebuild

@@ -5,12 +5,11 @@ EAPI=8
 
 inherit toolchain-funcs
 
-DESCRIPTION="WAV audio loader and writer"
+DESCRIPTION="Single-header WAV audio loader and writer library"
 HOMEPAGE="https://github.com/mackron/dr_libs/"
 COMMIT="d35a3bc5efd02455d98cbe12b94647136f09b42d"
-SRC_URI="https://raw.githubusercontent.com/mackron/dr_libs/${COMMIT}/dr_wav.h -> ${P}.gh.h
-	https://raw.githubusercontent.com/mackron/dr_libs/${COMMIT}/README.md -> ${P}-README.md
-	test? ( https://github.com/mackron/dr_libs/archive/${COMMIT}.tar.gz -> ${P}.gh.tar.gz )"
+SRC_URI="!test? ( https://raw.githubusercontent.com/mackron/dr_libs/${COMMIT}/dr_wav.h -> ${P}.h )
+		  test? ( https://github.com/mackron/dr_libs/archive/${COMMIT}.tar.gz -> ${P}.gh.tar.gz )"
 
 LICENSE="|| ( MIT-0 public-domain )"
 SLOT="0"
@@ -21,72 +20,98 @@ RESTRICT="!test? ( test )"
 
 BDEPEND="test? ( media-libs/libsndfile )"
 
-S="${DISTDIR}"
+TESTCASES=(
+	dr_wav_encoding.c
+	dr_wav_{decoding,test_0}.{c,cpp}
+)
+
+S="${WORKDIR}/dr_libs-${COMMIT}"
+
+src_unpack() {
+	default
+	unpack "${FILESDIR}"/${P}-docs.tar.xz
+}
 
 src_prepare() {
 	if use test; then
-		pushd "${WORKDIR}/dr_libs-${COMMIT}" > /dev/null || die
 		# Remove some unused parts of the source tree that could contribute different
 		# (but acceptable) license terms if they were used—just to prove that we do not
 		# use them.
-		rm -rv old
+		rm -rv old || die
 
 		# Unbundle library with incorrect include path.
 		sed -i 's,"../../../miniaudio/miniaudio.h",<miniaudio/miniaudio.h>,' \
 			tests/wav/dr_wav_playback.c || die
-		# Profiling tests aren't implemented.
+		# Disable profiling tests as they are not relevant downstream.
 		sed -i 's/doProfiling = DRWAV_TRUE/doProfiling = DRWAV_FALSE/' \
 			tests/wav/dr_wav_decoding.c || die
-		popd || die
+		# Test cases dr_wav_{en,de}coding.{c,cpp} write and read a file from a
+		# missing directory.
+		mkdir tests/testvectors/wav/tests || die
 	fi
 	default
 }
 
-src_test() {
-	local MY_{C,CC,CXX,BUILD,FLAGS,RUN} TESTCASES
-	TESTCASES=(
-		dr_wav_encoding.c
-		dr_wav_{decoding,test_0}.{c,cpp}
-	)
-	MY_CC=$(tc-getCC)
-	MY_CXX=$(tc-getCXX)
+src_compile() {
+	if use test; then
+		local MY_{C,CC,CXX,BUILD,FLAGS}
+		MY_CC=$(tc-getCC)
+		MY_CXX=$(tc-getCXX)
 
-	pushd "${WORKDIR}/dr_libs-${COMMIT}/tests" > /dev/null || die
+		pushd tests > /dev/null || die
+		for tcase in ${TESTCASES[@]}; do
+			einfo "Compiling test case ${tcase}."
+			case ${tcase} in
+				*.cpp)
+					MY_C=${MY_CXX}
+					MY_FLAGS=${CXXFLAGS}
+					;;
+				*.c)
+					MY_C=${MY_CC}
+					MY_FLAGS=${CFLAGS}
+					;;
+				*)
+					die "Unknown test case ${tcase}"
+					;;
+			esac
+			MY_BUILD="${MY_C} wav/${tcase} -o bin/${tcase} ${MY_FLAGS} ${CPPFLAGS}"
+			case ${tcase%.*} in
+				dr_wav_encoding)
+					MY_BUILD="${MY_BUILD} -lm ${LDFLAGS}"
+					;;
+				*)
+					;;
+			esac
+			${MY_BUILD} || die "Build failed: ${MY_BUILD}"
+		done
+		popd || die
+	fi
+}
+
+src_test() {
+	local MY_RUN
+
+	pushd tests || die
 	for tcase in ${TESTCASES[@]}; do
-		einfo "Compiling and running test case ${tcase}."
-		case ${tcase} in
-			*.cpp)
-				MY_C=${MY_CXX}
-				MY_FLAGS=${CXXFLAGS}
-				;;
-			*.c)
-				MY_C=${MY_CC}
-				MY_FLAGS=${CFLAGS}
-				;;
-			*)
-				die "Unknown test case ${tcase}"
-				;;
-		esac
-		MY_BUILD="${MY_C} wav/${tcase} -o bin/${tcase} ${MY_FLAGS} ${CPPFLAGS}"
+		einfo "Running test case ${tcase}."
 		MY_RUN="./bin/${tcase}"
 		case ${tcase%.*} in
 			dr_wav_encoding)
-				MY_BUILD="${MY_BUILD} -lm"
 				MY_RUN="${MY_RUN} testvectors/wav/tests/test_encode_gentoo"
-				mkdir testvectors/wav/tests || die
 				;;
 			*)
 				;;
 		esac
-		echo "${MY_BUILD}" || die
-		${MY_BUILD} || die "Build failed: ${MY_BUILD}"
-		echo "${MY_RUN}" || die
-		${MY_RUN} || die "Test case ${MY_RUN} failed."
+		${MY_RUN} || die "Test case ${tcase} failed."
 	done
 	popd || die
 }
 
 src_install() {
-	newheader ${P}.gh.h ${PN}.h
-	newdoc ${P}-README.md README.md
+	einstalldocs
+	if use test; then
+		doheader dr_wav.h
+	else
+		newheader "${DISTDIR}"/${P}.h dr_wav.h
+	fi
 }