internal/rosa/python: use predictable URLs

This is much cleaner and more maintainable than specifying URL prefix manually. This change also populates Anitya project identifiers.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/python.go

@@ -100,26 +100,23 @@ pip3 install \
 	)))
 }
 
-// newViaPip is a helper for installing python dependencies via pip.
-func newViaPip(
-	name, description, version, interpreter, abi, platform, checksum, prefix string,
+// newPypi creates [Metadata] for a [pypi] package.
+//
+// [pypi]: https://pypi.org/
+func newPypi(
+	name string, id int,
+	description, version, interpreter, abi, platform, checksum string,
 	extra ...PArtifact,
 ) Metadata {
-	wname := name + "-" + version + "-" + interpreter + "-" + abi + "-" + platform + ".whl"
 	return Metadata{
 		f: func(t Toolchain) (pkg.Artifact, string) {
-			return t.New(name+"-"+version, 0, t.AppendPresets(nil,
-				slices.Concat(P{Python}, extra)...,
-			), nil, nil, `
-pip3 install \
-	--no-index \
-	--prefix=/system \
-	--root=/work \
-	/usr/src/`+wname+`
-`, pkg.Path(AbsUsrSrc.Append(wname), false, pkg.NewHTTPGet(
-				nil, prefix+wname,
-				mustDecode(checksum),
-			))), version
+			return t.newViaPip(name, version, "https://files.pythonhosted.org/"+path.Join(
+				"packages",
+				interpreter,
+				string(name[0]),
+				name,
+				name+"-"+version+"-"+interpreter+"-"+abi+"-"+platform+".whl",
+			), checksum, extra...), version
 		},
 
 		Name:        "python-" + name,
@@ -127,6 +124,8 @@ pip3 install \
 		Website:     "https://pypi.org/project/" + name + "/",
 
 		Dependencies: slices.Concat(P{Python}, extra),
+
+		ID: id,
 	}
 }
 
@@ -167,49 +166,39 @@ func init() {
 }
 
 func init() {
-	artifactsM[PythonPygments] = newViaPip(
-		"pygments",
+	artifactsM[PythonPygments] = newPypi(
+		"pygments", 3986,
 		" a syntax highlighting package written in Python",
 		"2.19.2", "py3", "none", "any",
 		"ak_lwTalmSr7W4Mjy2XBZPG9I6a0gwSy2pS87N8x4QEuZYif0ie9z0OcfRfi9msd",
-		"https://files.pythonhosted.org/packages/"+
-			"c7/21/705964c7812476f378728bdf590ca4b771ec72385c533964653c68e86bdc/",
 	)
 
-	artifactsM[PythonPluggy] = newViaPip(
-		"pluggy",
+	artifactsM[PythonPluggy] = newPypi(
+		"pluggy", 7500,
 		"the core framework used by the pytest, tox, and devpi projects",
 		"1.6.0", "py3", "none", "any",
 		"2HWYBaEwM66-y1hSUcWI1MyE7dVVuNNRW24XD6iJBey4YaUdAK8WeXdtFMQGC-4J",
-		"https://files.pythonhosted.org/packages/"+
-			"54/20/4d324d65cc6d9205fabedc306948156824eb9f0ee1633355a8f7ec5c66bf/",
 	)
 
-	artifactsM[PythonPackaging] = newViaPip(
-		"packaging",
+	artifactsM[PythonPackaging] = newPypi(
+		"packaging", 60461,
 		"reusable core utilities for various Python Packaging interoperability specifications",
 		"26.0", "py3", "none", "any",
 		"iVVXcqdwHDskPKoCFUlh2x8J0Gyq-bhO4ns9DvUJ7oJjeOegRYtSIvLV33Bki-pP",
-		"https://files.pythonhosted.org/packages/"+
-			"b7/b9/c538f279a4e237a006a2c98387d081e9eb060d203d8ed34467cc0f0b9b53/",
 	)
 
-	artifactsM[PythonIniConfig] = newViaPip(
-		"iniconfig",
+	artifactsM[PythonIniConfig] = newPypi(
+		"iniconfig", 114778,
 		"a small and simple INI-file parser module",
 		"2.3.0", "py3", "none", "any",
 		"SDgs4S5bXi77aVOeKTPv2TUrS3M9rduiK4DpU0hCmDsSBWqnZcWInq9lsx6INxut",
-		"https://files.pythonhosted.org/packages/"+
-			"cb/b1/3846dd7f199d53cb17f49cba7e651e9ce294d8497c8c150530ed11865bb8/",
 	)
 
-	artifactsM[PythonPyTest] = newViaPip(
-		"pytest",
+	artifactsM[PythonPyTest] = newPypi(
+		"pytest", 3765,
 		"the pytest framework",
 		"9.0.2", "py3", "none", "any",
 		"IM2wDbLke1EtZhF92zvAjUl_Hms1uKDtM7U8Dt4acOaChMnDg1pW7ib8U0wYGDLH",
-		"https://files.pythonhosted.org/packages/"+
-			"3b/ab/b3226f0bd7cdcf710fbede2b3548584366da3b19b5021e74f5bde2a8fa3f/",
 		PythonIniConfig,
 		PythonPackaging,
 		PythonPluggy,