Re: [gentoo-dev] [PATCH] eclass/tree-sitter-grammar: fix ABI autodetecton

[Michał Górny]

On Thu, 2021-12-09 at 10:10 +0700, Vadim Misbakh-Soloviov wrote:
>   Some grammars packages (like, for example, tree-sitter-agda) uses
>   different versioning scheme from vast majority of grammars in
>   tree-sitter github organization.
>
>   Also, third-party grammars doesn't follow tree-sitter versioning.
>
>   Also, some grammars (like tree-sitter-haskell, for example) only had
>   old release tagged, but having compatible and useful grammars in
>   current HEAD.
>
>   Also, some grammars like tree-sitter-verilog, even have only v0.0 tag.
>
>   So, instead of assuming grammar ABI version based on ${PV} (ver_test)
>   we decided to take ABI version drectly from source code.
> ---
>  eclass/tree-sitter-grammar.eclass | 20 ++++++++++----------
>  1 file changed, 10 insertions(+), 10 deletions(-)
>
> diff --git a/eclass/tree-sitter-grammar.eclass b/eclass/tree-sitter-grammar.eclass
> index 46573027f96..939a36ccb8c 100644
> --- a/eclass/tree-sitter-grammar.eclass
> +++ b/eclass/tree-sitter-grammar.eclass
> @@ -40,15 +40,13 @@ EXPORT_FUNCTIONS src_compile src_install
>  # @INTERNAL
>  # @DESCRIPTION:
>  # This internal function determines the ABI version of a grammar library based
> -# on the package version.
> +# on a constant in the source file.
>  _get_tsg_abi_ver() {
> -	if ver_test -gt 0.21; then
> -		die "Grammar too new; unknown ABI version"
> -	elif ver_test -ge 0.19.0; then
> -		echo 13
> -	else
> -		die "Grammar too old; unknown ABI version"
> -	fi
> +	# This sed script finds ABI definition string in parser source file,
> +	# substitutes all the string until the ABI number, and prints remains
> +	# (the ABI number itself)
> +	sed -n '/#define LANGUAGE_VERSION/s/.* //p' "${S}"/parser.c ||

I think you can do:

  sed -n 's/#define LANGUAGE_VERSION //p' ...

'p' applies only on successful replacement.

> +		die "Unable to extract ABI version for this grammar"
>  }
>
>  # @FUNCTION: tree-sitter-grammar_src_compile
> @@ -89,8 +87,10 @@ tree-sitter-grammar_src_compile() {
>  tree-sitter-grammar_src_install() {
>  	debug-print-function ${FUNCNAME} "${@}"
>
> -	dolib.so "${WORKDIR}"/lib${PN}$(get_libname $(_get_tsg_abi_ver))
> -	dosym lib${PN}$(get_libname $(_get_tsg_abi_ver)) \
> +	local soname=lib${PN}$(get_libname $(_get_tsg_abi_ver))
> +
> +	dolib.so "${WORKDIR}/${soname}"
> +	dosym "${soname}" \
>  		  /usr/$(get_libdir)/lib${PN}$(get_libname)
>  }
>  fi

-- 
Best regards,
Michał Górny