Improve support for 3 path segments NPM URLs in url2purl #167 (#170)

Signed-off-by: tdruez <tdruez@nexb.com>

Author: tdruez

CHANGELOG.rst

@@ -7,6 +7,9 @@ Changelog
 - Drop support for Python 3.7.
   https://github.com/package-url/packageurl-python/issues/160
 
+- Improve support for 3 path segments NPM URLs in ``url2purl``.
+  https://github.com/package-url/packageurl-python/issues/167
+
 0.15.6 (2024-07-25)
 -------------------
 

src/packageurl/contrib/url2purl.py

@@ -143,20 +143,19 @@ def build_npm_api_purl(uri):
     path = unquote_plus(urlparse(uri).path)
     segments = [seg for seg in path.split("/") if seg]
 
-    if len(segments) != 2:
+    if len(segments) < 2:
         return
 
+    # /@esbuild/freebsd-arm64/0.21.5
+    if len(segments) == 3:
+        return PackageURL("npm", namespace=segments[0], name=segments[1], version=segments[2])
+
     # /@invisionag/eslint-config-ivx
     if segments[0].startswith("@"):
-        namespace = segments[0]
-        name = segments[1]
-        return PackageURL("npm", namespace, name)
+        return PackageURL("npm", namespace=segments[0], name=segments[1])
 
     # /angular/1.6.6
-    else:
-        name = segments[0]
-        version = segments[1]
-        return PackageURL("npm", name=name, version=version)
+    return PackageURL("npm", name=segments[0], version=segments[1])
 
 
 def build_npm_download_purl(uri):

tests/contrib/data/url2purl.json

@@ -88,6 +88,7 @@
   "https://registry.npmjs.org/xdg-basedir/-/xdg-basedir-3.0.0.tgz": "pkg:npm/xdg-basedir@3.0.0",
   "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz": "pkg:npm/yallist@2.1.2",
   "https://registry.npmjs.org/@theia/plugin-ext/-/plugin-ext-0.9.0-next.007f41ae.tgz": "pkg:npm/%40theia/plugin-ext@0.9.0-next.007f41ae",
+  "https://registry.npmjs.org/@esbuild/freebsd-arm64/0.21.5": "pkg:npm/%40esbuild/freebsd-arm64@0.21.5",
   "https://npmjs.com/package/abbrev": "pkg:npm/abbrev",
   "https://npmjs.com/package/accepts/v/1.3.7": "pkg:npm/accepts@1.3.7",
   "https://npmjs.com/package/@angular/cli": "pkg:npm/%40angular/cli",

tests/contrib/test_purl2url.py

@@ -58,6 +58,7 @@ def test_purl2url_get_repo_url():
         "pkg:npm/is-npm": "https://www.npmjs.com/package/is-npm",
         "pkg:npm/@clayui/tooltip@3.1.0": "https://www.npmjs.com/package/@clayui/tooltip/v/3.1.0",
         "pkg:npm/%40clayui/tooltip@3.1.0": "https://www.npmjs.com/package/@clayui/tooltip/v/3.1.0",
+        "pkg:npm/%40esbuild/freebsd-arm64@0.21.5": "https://www.npmjs.com/package/@esbuild/freebsd-arm64/v/0.21.5",
         "pkg:nuget/System.Text.Json": "https://www.nuget.org/packages/System.Text.Json",
         "pkg:nuget/System.Text.Json@6.0.6": "https://www.nuget.org/packages/System.Text.Json/6.0.6",
         "pkg:hackage/cli-extras": "https://hackage.haskell.org/package/cli-extras",
@@ -81,6 +82,7 @@ def test_purl2url_get_download_url():
         "pkg:npm/is-npm@1.0.0": "https://registry.npmjs.org/is-npm/-/is-npm-1.0.0.tgz",
         "pkg:npm/@clayui/tooltip@3.1.0": "https://registry.npmjs.org/@clayui/tooltip/-/tooltip-3.1.0.tgz",
         "pkg:npm/%40clayui/tooltip@3.1.0": "https://registry.npmjs.org/@clayui/tooltip/-/tooltip-3.1.0.tgz",
+        "pkg:npm/%40esbuild/freebsd-arm64@0.21.5": "https://registry.npmjs.org/@esbuild/freebsd-arm64/-/freebsd-arm64-0.21.5.tgz",
         "pkg:hackage/cli-extras@0.2.0.0": "https://hackage.haskell.org/package/cli-extras-0.2.0.0/cli-extras-0.2.0.0.tar.gz",
         "pkg:nuget/System.Text.Json@6.0.6": "https://www.nuget.org/api/v2/package/System.Text.Json/6.0.6",
         "pkg:github/nexb/scancode-toolkit@3.1.1?version_prefix=v": "https://github.com/nexb/scancode-toolkit/archive/v3.1.1.tar.gz",