PurlDB: purl2sym Data collection Batch2

[DennisClark]

Here we add purl2sym support for a list of PURLs listed below.

1. Add support in FetchCode and PurlDB
2. Test of end-to-end support in the PurlDB

• pkg:generic/hostapd
• pkg:generic/iptables
• pkg:generic/libnl
• pkg:generic/nftables
• pkg:generic/samba
• pkg:generic/wpa_supplicant
• pkg:generic/lighttpd
• pkg:generic/iproute2

[keshav-space]

Completed in:

• Add support for directory listed source archives in package.info fetchcode#107
• Support indexing of directory listed and GNU packages #318

The simple way to test this is to follow the below steps after installing PurlDB (https://github.com/nexB/purldb?tab=readme-ov-file#installation):

1. Go to /api/collect/ add PURL for indexing. ex: /api/collect/?purl=pkg:generic/hostapd@2.8&addon_pipelines=collect_symbols_ctags
2. Once the indexing has completed go to /api/resources/and filter out resource based on PURL to see the symbols for each resource in extra_data field. ex: /api/resources/?purl=pkg:generic/hostapd@2.8

Tip

Follow this tutorial to index the symbols and strings literals for a PURL/Package using various different addon pipelines. https://aboutcode.readthedocs.io/projects/PURLdb/en/latest/how-to-guides/tutorial_symbol_and_string_collection.html