setup meson to allow building multiple fuzzers easily

fuzz/atom/meson.build

@@ -0,0 +1 @@
+subdir('parser')

fuzz/atom/parser/meson.build

@@ -0,0 +1,6 @@
+fuzzers += {
+    'atom_parser': [
+        meson.current_source_dir() / 'gencorpus.rs',
+        meson.current_source_dir() / 'fuzz.rs',
+    ],
+}

fuzz/meson.build

@@ -1,40 +1,59 @@
 cbindgen = find_program('cbindgen')
 
-gencorpus = executable(
-    'gencorpus',
-    'gencorpus.rs',
-    dependencies: [mon],
-    link_with: [gentoo_utils],
-)
+fuzzers = {}
 
-corpus_directory = meson.current_build_dir() / 'corpus'
+subdir('atom')
 
-corpus = custom_target(
-    'corpus',
-    output: 'corpus',
-    command: [gencorpus, corpus_directory],
-)
+foreach fuzzer, sources : fuzzers
+    gencorpus_rs = sources[0]
+    fuzz_rs = sources[1]
 
-fuzz_h = custom_target(
-    'fuzz_h',
-    input: 'fuzz.rs',
-    output: 'fuzz.h',
-    command: [cbindgen, '@INPUT@', '-o', '@OUTPUT'],
-)
+    gencorpus = executable(
+        fuzzer + '_' + 'gencorpus',
+        gencorpus_rs,
+        dependencies: [mon],
+        link_with: [gentoo_utils],
+    )
 
-fuzz_rs = static_library(
-    'fuzz_rs',
-    'fuzz.rs',
-    rust_abi: 'c',
-    rust_args: [
-        '-Cpasses=sancov-module',
-        '-Cllvm-args=-sanitizer-coverage-level=3',
-        '-Cllvm-args=-sanitizer-coverage-inline-8bit-counters',
-    ],
-    dependencies: [mon],
-    link_with: [gentoo_utils],
-)
+    corpus_directory = fuzzer + '_' + 'corpus'
 
-fuzz = executable('fuzz', link_args: ['-fsanitize=fuzzer'], link_with: [fuzz_rs])
+    corpus = custom_target(
+        fuzzer + '_' + 'corpus',
+        output: fuzzer + '_' + 'corpus',
+        command: [gencorpus, corpus_directory],
+    )
 
-test('fuzz', fuzz, args: [corpus_directory], depends: [corpus], timeout: 0)
+    fuzz_h = custom_target(
+        fuzzer + '_' + 'fuzz_h',
+        input: fuzz_rs,
+        output: fuzzer + '_' + 'fuzz.h',
+        command: [cbindgen, '@INPUT@', '-o', '@OUTPUT'],
+    )
+
+    fuzz_rs = static_library(
+        fuzzer + '.rs',
+        fuzz_rs,
+        rust_abi: 'c',
+        rust_args: [
+            '-Cpasses=sancov-module',
+            '-Cllvm-args=-sanitizer-coverage-level=3',
+            '-Cllvm-args=-sanitizer-coverage-inline-8bit-counters',
+        ],
+        dependencies: [mon],
+        link_with: [gentoo_utils],
+    )
+
+    fuzz = executable(
+        fuzzer + '_' + 'fuzzer',
+        link_args: ['-fsanitize=fuzzer'],
+        link_with: [fuzz_rs],
+    )
+
+    test(
+        fuzzer + '_' + 'fuzz',
+        fuzz,
+        args: [corpus_directory],
+        depends: [corpus],
+        timeout: 0,
+    )
+endforeach