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-rw-r--r--build/rust/mozbuild/generate_buildconfig.py95
1 files changed, 95 insertions, 0 deletions
diff --git a/build/rust/mozbuild/generate_buildconfig.py b/build/rust/mozbuild/generate_buildconfig.py
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+++ b/build/rust/mozbuild/generate_buildconfig.py
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+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import string
+import textwrap
+
+import buildconfig
+
+
+def generate_bool(name):
+ value = buildconfig.substs.get(name)
+ return f"pub const {name}: bool = {'true' if value else 'false'};\n"
+
+
+def escape_rust_string(value):
+ """escape the string into a Rust literal"""
+ # This could be more generous, but we're only escaping paths with it.
+ unescaped = string.ascii_letters + string.digits + "/$+-_~ "
+ result = ""
+ for ch in str(value):
+ if ch in unescaped:
+ result += ch
+ elif ch == "\r":
+ result += "\\r"
+ elif ch == "\n":
+ result += "\\n"
+ elif ch == "\\":
+ result += "\\\\"
+ elif ch == '"':
+ result += '\\"'
+ else:
+ result += "\\u{%x}" % ord(ch)
+ return '"%s"' % result
+
+
+def generate(output):
+ # Write out a macro which can be used within `include!`-like methods to
+ # reference the topobjdir.
+ output.write(
+ textwrap.dedent(
+ f"""
+ /// Macro used to name a path in the objdir for use with macros like `include!`
+ #[macro_export]
+ macro_rules! objdir_path {{
+ ($path:literal) => {{
+ concat!({escape_rust_string(buildconfig.topobjdir + "/")}, $path)
+ }}
+ }}
+
+ /// Macro used to name a path in the srcdir for use with macros like `include!`
+ #[macro_export]
+ macro_rules! srcdir_path {{
+ ($path:literal) => {{
+ concat!({escape_rust_string(buildconfig.topsrcdir + "/")}, $path)
+ }}
+ }}
+
+ /// The objdir path for use in build scripts
+ pub const TOPOBJDIR: &str = {escape_rust_string(buildconfig.topobjdir)};
+ /// The srcdir path for use in build scripts
+ pub const TOPSRCDIR: &str = {escape_rust_string(buildconfig.topsrcdir)};
+
+ """
+ )
+ )
+
+ windows_rs_dir = buildconfig.substs.get("MOZ_WINDOWS_RS_DIR")
+ if windows_rs_dir:
+ output.write(
+ textwrap.dedent(
+ f"""
+ /// Macro used to name a path in the srcdir for use with macros like `include!`
+ #[macro_export]
+ macro_rules! windows_rs_path {{
+ ($path:literal) => {{
+ concat!({escape_rust_string(windows_rs_dir + "/")}, $path)
+ }}
+ }}
+
+ /// The path to the windows-rs crate, for use in build scripts
+ pub const WINDOWS_RS_DIR: &str = {escape_rust_string(windows_rs_dir)};
+
+ """
+ )
+ )
+
+ # Finally, write out some useful booleans from the buildconfig.
+ output.write(generate_bool("MOZ_FOLD_LIBS"))
+ output.write(generate_bool("NIGHTLY_BUILD"))
+ output.write(generate_bool("RELEASE_OR_BETA"))
+ output.write(generate_bool("EARLY_BETA_OR_EARLIER"))
+ output.write(generate_bool("MOZ_DEV_EDITION"))
+ output.write(generate_bool("MOZ_ESR"))
+ output.write(generate_bool("MOZ_DIAGNOSTIC_ASSERT_ENABLED"))