summaryrefslogtreecommitdiff
path: root/eclass/tree-sitter-grammar.eclass
blob: 499f1c7259a0ee50610d84e458d6d74df0a2b13b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
# Copyright 1999-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# @ECLASS: tree-sitter-grammar.eclass
# @MAINTAINER:
# Matthew Smith <matthew@gentoo.org>
# Arthur Zamarin <arthurzam@gentoo.org>
# @AUTHOR:
# Matthew Smith <matthew@gentoo.org>
# @SUPPORTED_EAPIS: 8
# @BLURB: Common functions and variables for Tree Sitter grammars

case ${EAPI} in
	8) ;;
	*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
esac

if [[ -z ${_TREE_SITTER_GRAMMAR_ECLASS} ]]; then
_TREE_SITTER_GRAMMAR_ECLASS=1

inherit edo multilib toolchain-funcs

SRC_URI="https://github.com/tree-sitter/${PN}/archive/${TS_PV:-v${PV}}.tar.gz
	-> ${P}.tar.gz"
S="${WORKDIR}"/${PN}-${TS_PV:-${PV}}

BDEPEND+=" test? ( dev-util/tree-sitter-cli )"
IUSE+=" test"
RESTRICT+=" !test? ( test )"

# @ECLASS_VARIABLE: TS_PV
# @PRE_INHERIT
# @DEFAULT_UNSET
# @DESCRIPTION:
# Used to override upstream tag name if tagged differently, e.g. most releases
# are v${PV} but some are tagged as rust-${PV}.

# @ECLASS_VARIABLE: TS_BINDINGS
# @PRE_INHERIT
# @DEFAULT_UNSET
# @DESCRIPTION:
# Array of bindings language to build. Currently only "python" is supported.

for _BINDING in "${TS_BINDINGS[@]}"; do
	case ${_BINDING} in
		python)
			DISTUTILS_EXT=1
			DISTUTILS_OPTIONAL=1
			DISTUTILS_USE_PEP517=setuptools
			PYTHON_COMPAT=( python3_{10..13} )
			inherit distutils-r1

			IUSE+=" python"
			REQUIRED_USE+=" python? ( ${PYTHON_REQUIRED_USE} )"

			DEPEND+=" python? (
				${PYTHON_DEPS}
			)"
			RDEPEND+=" python? (
				${PYTHON_DEPS}
				>=dev-python/tree-sitter-0.21.0[${PYTHON_USEDEP}]
			)"
			BDEPEND+=" python? (
				${PYTHON_DEPS}
				${DISTUTILS_DEPS}
				dev-python/wheel[${PYTHON_USEDEP}]
			)"
			;;
		*)
			die "Unknown binding: ${_BINDING}"
			;;
	esac
done
unset _BINDING

# @FUNCTION: _get_tsg_abi_ver
# @INTERNAL
# @DESCRIPTION:
# This internal function determines the ABI version of a grammar library based
# on a constant in the source file.
_get_tsg_abi_ver() {
	# 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 's/#define LANGUAGE_VERSION //p' "${S}"/src/parser.c ||
		die "Unable to extract ABI version for this grammar"
}

tree-sitter-grammar_src_prepare() {
	debug-print-function ${FUNCNAME} "$@"

	default

	local binding
	for binding in "${TS_BINDINGS[@]}"; do
		case ${binding} in
			python)
				use python && distutils-r1_src_prepare
				;;
		esac
	done
}

tree-sitter-grammar_src_configure() {
	debug-print-function ${FUNCNAME} "$@"

	local binding
	for binding in "${TS_BINDINGS[@]}"; do
		case ${binding} in
			python)
				use python && distutils-r1_src_configure
				;;
		esac
	done
}

# @FUNCTION: _tree-sitter-grammar_legacy_compile
# @INTERNAL
# @DESCRIPTION:
# Compiles the Tree Sitter parser as a shared library, the legacy way.
_tree-sitter-grammar_legacy_compile() {
	cd "${S}/src" || die

	# Grammars always contain parser.c, and sometimes a scanner.c,
	# or scanner.cc.

	tc-export CC CXX
	# We want to use the bundled parser.h, not anything lurking on the system, hence -I
	# See https://github.com/tree-sitter/tree-sitter-bash/issues/199#issuecomment-1694416505
	local -x CFLAGS="${CFLAGS} -fPIC -I. -Itree_sitter"
	local -x CXXFLAGS="${CXXFLAGS} -fPIC -I. -Itree_sitter"

	local objects=( parser.o )
	if [[ -f "${S}"/src/scanner.c || -f "${S}"/src/scanner.cc ]]; then
		objects+=( scanner.o )
	fi
	emake "${objects[@]}"

	local link="$(tc-getCC) ${CFLAGS}"
	if [[ -f "${S}/src/scanner.cc" ]]; then
		link="$(tc-getCXX) ${CXXFLAGS}"
	fi

	local soname=lib${PN}$(get_libname $(_get_tsg_abi_ver))

	local soname_args="-Wl,--soname=${soname}"
	if [[ ${CHOST} == *darwin* ]] ; then
		soname_args="-Wl,-install_name,${EPREFIX}/usr/$(get_libdir)/${soname}"
	fi

	edo ${link} ${LDFLAGS} \
			-shared \
			*.o \
			"${soname_args}" \
			-o "${WORKDIR}"/${soname}
}

tree-sitter-grammar_src_compile() {
	debug-print-function ${FUNCNAME} "$@"

	# legacy grammars don't have a pyproject.toml
	if [[ -f "${S}/pyproject.toml" ]]; then
		sed -e "/SONAME_MINOR :=/s/:=.*$/:= $(_get_tsg_abi_ver)/" -i "${S}/Makefile" || die
		emake \
			CC="$(tc-getCC)" \
			AR="$(tc-getAR)" \
			STRIP="" \
			PREFIX="${EPREFIX}/usr" \
			LIBDIR="${EPREFIX}/usr/$(get_libdir)"
	else
		_tree-sitter-grammar_legacy_compile
	fi

	local binding
	for binding in "${TS_BINDINGS[@]}"; do
		case ${binding} in
			python)
				use python && distutils-r1_src_compile
				;;
		esac
	done
}

# @FUNCTION: tree-sitter-grammar_src_test
# @DESCRIPTION:
# Runs the Tree Sitter parser's test suite.
# See: https://tree-sitter.github.io/tree-sitter/creating-parsers#command-test
tree-sitter-grammar_src_test() {
	debug-print-function ${FUNCNAME} "$@"

	tree-sitter test || die "Test suite failed"
}

tree-sitter-grammar_src_install() {
	debug-print-function ${FUNCNAME} "$@"

	# legacy grammars don't have a pyproject.toml
	if [[ -f "${S}/pyproject.toml" ]]; then
		emake \
			PREFIX="${EPREFIX}/usr" \
			LIBDIR="${EPREFIX}/usr/$(get_libdir)" \
			DESTDIR="${D}/" \
			install
		find "${D}" -name '*.a' -delete || die "failed to remove static libraries"
	else
		local soname=lib${PN}$(get_libname $(_get_tsg_abi_ver))

		dolib.so "${WORKDIR}/${soname}"
		dosym "${soname}" /usr/$(get_libdir)/lib${PN}$(get_libname)
	fi

	local binding
	for binding in "${TS_BINDINGS[@]}"; do
		case ${binding} in
			python)
				use python && distutils-r1_src_install
				;;
		esac
	done
}

fi

EXPORT_FUNCTIONS src_prepare src_configure src_compile src_test src_install