[PATCH v16 3/5] spdx30: Add ecosystem PURLs for recipe classes

[Stefano Tondo <stondo@gmail.com>]

Add SPDX_PACKAGE_URLS to recipe classes to generate ecosystem-specific
Package URLs for SPDX 3.0 SBOMs. This enables proper package
identification across different packaging ecosystems.

Classes updated:
- cargo_common.bbclass: pkg:cargo PURLs for Rust crates
- cpan.bbclass: pkg:cpan PURLs for Perl modules (with name normalization)
- go-mod.bbclass: pkg:golang PURLs for Go modules
- npm.bbclass: pkg:npm PURLs for Node.js packages (with name normalization)
- pypi.bbclass: pkg:pypi PURLs for Python packages (with name normalization)

The SPDX_PACKAGE_URLS variable is a space-separated list which
create-spdx-3.0 already reads via set_purls() to populate
software_packageUrl and externalIdentifier on recipe packages.

Signed-off-by: Stefano Tondo <stefano.tondo.ext@siemens.com>
---
 meta/classes-recipe/cargo_common.bbclass |  3 +++
 meta/classes-recipe/cpan.bbclass         | 11 +++++++++++
 meta/classes-recipe/go-mod.bbclass       |  3 +++
 meta/classes-recipe/npm.bbclass          |  7 +++++++
 meta/classes-recipe/pypi.bbclass         |  3 +++
 5 files changed, 27 insertions(+)

diff --git a/meta/classes-recipe/cargo_common.bbclass b/meta/classes-recipe/cargo_common.bbclass
index bc44ad7918..0d3edfe4a7 100644
--- a/meta/classes-recipe/cargo_common.bbclass
+++ b/meta/classes-recipe/cargo_common.bbclass
@@ -240,3 +240,6 @@ EXPORT_FUNCTIONS do_configure
 # https://github.com/rust-lang/libc/issues/3223
 # https://github.com/rust-lang/libc/pull/3175
 INSANE_SKIP:append = " 32bit-time"
+
+# Generate ecosystem-specific Package URL for SPDX
+SPDX_PACKAGE_URLS =+ "pkg:cargo/${BPN}@${PV} "
diff --git a/meta/classes-recipe/cpan.bbclass b/meta/classes-recipe/cpan.bbclass
index bb76a5b326..dbf44da9d2 100644
--- a/meta/classes-recipe/cpan.bbclass
+++ b/meta/classes-recipe/cpan.bbclass
@@ -68,4 +68,15 @@ cpan_do_install () {
 	done
 }
 
+# Generate ecosystem-specific Package URL for SPDX
+def cpan_spdx_name(d):
+    bpn = d.getVar('BPN')
+    if bpn.startswith('perl-'):
+        return bpn[5:]
+    elif bpn.startswith('libperl-'):
+        return bpn[8:]
+    return bpn
+
+SPDX_PACKAGE_URLS =+ "pkg:cpan/${@cpan_spdx_name(d)}@${PV} "
+
 EXPORT_FUNCTIONS do_configure do_compile do_install
diff --git a/meta/classes-recipe/go-mod.bbclass b/meta/classes-recipe/go-mod.bbclass
index a15dda8f0e..0f5835f26e 100644
--- a/meta/classes-recipe/go-mod.bbclass
+++ b/meta/classes-recipe/go-mod.bbclass
@@ -32,3 +32,6 @@ do_compile[dirs] += "${B}/src/${GO_WORKDIR}"
 # Make go install unpack the module zip files in the module cache directory
 # before the license directory is polulated with license files.
 addtask do_compile before do_populate_lic
+
+# Generate ecosystem-specific Package URL for SPDX
+SPDX_PACKAGE_URLS =+ "pkg:golang/${GO_IMPORT}@${PV} "
diff --git a/meta/classes-recipe/npm.bbclass b/meta/classes-recipe/npm.bbclass
index 344e8b4bec..7bb791d543 100644
--- a/meta/classes-recipe/npm.bbclass
+++ b/meta/classes-recipe/npm.bbclass
@@ -354,4 +354,11 @@ FILES:${PN} += " \
     ${nonarch_libdir} \
 "
 
+# Generate ecosystem-specific Package URL for SPDX
+def npm_spdx_name(d):
+    bpn = d.getVar('BPN')
+    return bpn[5:] if bpn.startswith('node-') else bpn
+
+SPDX_PACKAGE_URLS =+ "pkg:npm/${@npm_spdx_name(d)}@${PV} "
+
 EXPORT_FUNCTIONS do_configure do_compile do_install
diff --git a/meta/classes-recipe/pypi.bbclass b/meta/classes-recipe/pypi.bbclass
index 9d46c035f6..bd21557c60 100644
--- a/meta/classes-recipe/pypi.bbclass
+++ b/meta/classes-recipe/pypi.bbclass
@@ -54,3 +54,6 @@ UPSTREAM_CHECK_URI ?= "https://pypi.org/simple/${@pypi_normalize(d)}/"
 UPSTREAM_CHECK_REGEX ?= "${UPSTREAM_CHECK_PYPI_PACKAGE}-(?P<pver>(\d+[\.\-_]*)+).(tar\.gz|tgz|zip|tar\.bz2)"
 
 CVE_PRODUCT ?= "python:${PYPI_PACKAGE}"
+
+# Generate ecosystem-specific Package URL for SPDX
+SPDX_PACKAGE_URLS =+ "pkg:pypi/${@pypi_normalize(d)}@${PV} "
-- 
2.53.0