Merge pull request #9 from jaqx0r/bazel-build

build: Set up bazel to replace SCons.

.gitignore

@@ -77,3 +77,7 @@ ylwrap
 /input/filtergen/t/factorise
 /coverage.info
 /coverage_html/
+/bazel-bin
+/bazel-filtergen
+/bazel-out
+/bazel-testlogs

BUILD

@@ -0,0 +1,44 @@
+package(default_visibility = [":__subpackages__"])
+
+cc_library(
+    name = "core",
+    srcs = [
+        "error.c",
+        "fg-util.c",
+        "filter.c",
+        "icmpent.c",
+    ],
+    hdrs = [
+        "error.h",
+        "filter.h",
+        "icmpent.h",
+        "util.h",
+    ],
+    deps = ["//input:sourcepos"],
+)
+
+cc_library(
+    name = "factoriser",
+    srcs = ["factoriser.c"],
+    hdrs = ["factoriser.h"],
+)
+
+cc_binary(
+    name = "filtergen",
+    srcs = [
+        "fg-iptrestore.c",
+        "filtergen.c",
+        "gen.c",
+    ],
+    defines = ["VERSION=\\\"TODO\\\""],
+    deps = [
+        "//input/filtergen:in_filtergen",
+        "//input/iptables-save:in_iptables_save",
+        "//output/cisco:out_cisco",
+        "//output/filtergen:out_filtergen",
+        "//output/ipchains:out_ipchains",
+        "//output/ipfilter:out_ipfilter",
+        "//output/iptables:out_iptables",
+        "//output/iptablesrestore:out_iptablesrestore",
+    ],
+)

MODULE.bazel

@@ -0,0 +1,9 @@
+###############################################################################
+# Bazel now uses Bzlmod by default to manage external dependencies.
+# Please consider migrating your external dependencies from WORKSPACE to MODULE.bazel.
+#
+# For more details, please check https://github.com/bazelbuild/bazel/issues/18958
+###############################################################################
+
+bazel_dep(name = "rules_bison", version = "0.2.2")
+bazel_dep(name = "rules_flex", version = "0.2.1")