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Before this change an invalid licence= in an APKBUILD will pass `abuild sanitycheck`. '/usr/share/spdx/license.lst' contains one licence per line. `grep -x` will match partial lines whereas `grep -w` will only match whole lines. An simple demonstration is with 'GPL-3.0' which is not a valid SPDX licence identifier. 'GPL-3.0-only' and 'GPL-3.0-or-later' are valid licences. ``` $ grep --help BusyBox v1.30.1 (2019-04-26 06:26:16 UTC) multi-call binary. Usage: grep [-HhnlLoqvsriwFE] [-m N] [-A/B/C N] PATTERN/-e PATTERN.../-f FILE [FILE]... Search for PATTERN in FILEs (or stdin)
✂ -w Match whole words only -x Match whole lines only✂ $ grep -w -F GPL-3.0 /usr/share/spdx/license.lst GPL-3.0-only GPL-3.0-or-later $ grep -x -F GPL-3.0 /usr/share/spdx/license.lst $ ```e476188c
