From 2e2d1bd3b6c7776b77c33b94f30ead89367a71e6 Mon Sep 17 00:00:00 2001
From: Lexi Winter <lexi@le-fay.org>
Date: Tue, 1 Jul 2025 17:07:04 +0100
Subject: add nihil.std

---
 nihil.posix/write_file.ccm | 43 ++++++++++++-------------------------------
 1 file changed, 12 insertions(+), 31 deletions(-)

(limited to 'nihil.posix/write_file.ccm')

diff --git a/nihil.posix/write_file.ccm b/nihil.posix/write_file.ccm
index ce21e6b..4bdd6e2 100644
--- a/nihil.posix/write_file.ccm
+++ b/nihil.posix/write_file.ccm
@@ -1,34 +1,19 @@
-/*
- * This source code is released into the public domain.
- */
-
-module;
-
-#include <coroutine>
-#include <expected>
-#include <filesystem>
-#include <ranges>
-#include <system_error>
-#include <vector>
-
-#include <fcntl.h>
-#include <unistd.h>
-
+// This source code is released into the public domain.
 export module nihil.posix:write_file;
 
+import nihil.std;
 import nihil.error;
 import nihil.guard;
 import nihil.monad;
 import :fd;
 import :open;
 import :rename;
+import :unlink;
 
 namespace nihil {
 
-/*
- * Write the contents of a range to a file.  Returns the number of bytes
- * written.
- */
+// Write the contents of a range to a file.  Returns the number of bytes
+// written.
 export [[nodiscard]]
 auto write_file(std::filesystem::path const &filename,
 		std::ranges::contiguous_range auto &&range,
@@ -40,9 +25,7 @@ auto write_file(std::filesystem::path const &filename,
 	co_return nbytes;
 }
 
-/*
- * Utility wrapper for non-contiguous ranges.
- */
+// Utility wrapper for non-contiguous ranges.
 export [[nodiscard]]
 auto write_file(std::filesystem::path const &filename,
 		std::ranges::range auto &&range)
@@ -52,12 +35,10 @@ requires(!std::ranges::contiguous_range<decltype(range)>)
 	return write_file(filename, std::vector(std::from_range, range));
 }
 
-/*
- * Write the contents of a range to a file safely.  The data will be written
- * to "<filename>.tmp", and if the write succeeds, the temporary file will be
- * renamed to the target filename.  If an error occurs, the target file will
- * not be modified.
- */
+// Write the contents of a range to a file safely.  The data will be written
+// to "<filename>.tmp", and if the write succeeds, the temporary file will be
+// renamed to the target filename.  If an error occurs, the target file will
+// not be modified.
 export [[nodiscard]]
 auto safe_write_file(std::filesystem::path const &filename,
 		     std::ranges::range auto &&range)
@@ -68,11 +49,11 @@ auto safe_write_file(std::filesystem::path const &filename,
 	tmpfile /= (filename.filename().native() + ".tmp");
 
 	auto tmpfile_guard = guard([&tmpfile] {
-		::unlink(tmpfile.c_str());
+		std::ignore = unlink(tmpfile.c_str());
 	});
 
 	co_await write_file(tmpfile, range);
-	co_await nihil::rename(tmpfile, filename);
+	co_await rename(tmpfile, filename);
 
 	tmpfile_guard.release();
 	co_return {};
-- 
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