Re: [dpdk-dev] [PATCH v4] devtools: add new SPDX license compliance checker

[Thomas Monjalon <thomas@monjalon.net>]

24/02/2020 22:01, Stephen Hemminger:
> +tmpfile=$(mktemp)

Please check how other temp files are created in other scripts
for consitency.

> +    git grep -L SPDX-License-Identifier -- \
> +	':^.git*' ':^.ci/*' ':^.travis.yml' \
> +	':^README' ':^MAINTAINERS' ':^VERSION' ':^ABI_VERSION' \
> +	':^*/Kbuild' ':^*/README' \
> +	':^license/' ':^doc/' ':^config/' ':^buildtools/' \

I think doc/ should be part of the license check,
same for buildtools/.

> +	':^*.cocci' ':^*.abignore' \
> +	':^*.def' ':^*.map' ':^*.ini' ':^*.data' ':^*.cfg' ':^*.txt' \
> +	> $tmpfile
> +
> +    errors=0
> +    while read -r line
> +    do $quiet || echo $line
> +       errors=$((errors + 1))

I'm surprised this works for you.
In general, "while" creates a subshell which makes impossible
updating a variable.
I recommend using "for" with IFS=$'\n'.

> +    done < $tmpfile
> +}
> +
> +check_boilerplate() {
> +    if $verbose ; then
> +	echo
> +	echo "Files with redundant license text"
> +	echo "---------------------------------"
> +    fi
> +
> +    git grep -l Redistribution -- \
> +	':^license/' ':^/devtools/check-spdx-tag.sh' |
> +	while read line
> +	do $quiet || echo $line
> +	   warnings=$((warnings + 1))
> +	done

Same comment about "while" subshell.

> +
> +    warnings=0
> +    while read -r line
> +    do $quiet || echo $line
> +       warnings=$((errors + 1))

Here too

> +    done < $tmpfile
> +}

[...]
> +Each file must begin with a special comment containing the
> +`Software Package Data Exchange (SPDX) License Identfier <https://spdx.org/using-spdx-license-identifier>`_.

Typo: Identifier

> +
> +Generally this is the BSD License, except for code granted special exceptions.

Is a verb missing?

> +The SPDX licences identifier is sufficient, a file should not contain
> +an additional text version of the license (boilerplate).