fix(c): simplify the template config files

c/.gitattributes

@@ -1,2 +0,0 @@
-* text=lf
-* eol=lf

c/.gitignore

@@ -1,15 +1,64 @@
 # binaries
 hello
 
-# build
-*.[aod]
-
-# config
+# language support
 compile_commands.json
-.pre-commit-config.yaml
 .cache
 
 # nix
 .direnv
-.envrc
-result
+result*
+repl-result-*
+
+# Prerequisites
+*.d
+
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Linker output
+*.ilk
+*.map
+*.exp
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+*.su
+*.idb
+*.pdb
+
+# Kernel Module Compile Results
+*.mod*
+*.cmd
+.tmp_versions/
+modules.order
+Module.symvers
+Mkfile.old
+dkms.conf

c/Dockerfile

@@ -1,29 +0,0 @@
-# Credit to Mitchell Hashimoto
-# post: https://mitchellh.com/writing/nix-with-dockerfiles
-
-# Nix builder
-FROM nixos/nix:latest AS builder
-
-# Copy our source and setup our working dir.
-COPY . /tmp/build
-WORKDIR /tmp/build
-
-# Build our Nix environment
-RUN nix \
-    --extra-experimental-features "nix-command flakes" \
-    --option filter-syscalls false \
-    build
-
-# Copy the Nix store closure into a directory. The Nix store closure is the
-# entire set of Nix store values that we need for our build.
-RUN mkdir /tmp/nix-store-closure
-RUN cp -R $(nix-store -qR result/) /tmp/nix-store-closure
-
-# Final image is based on scratch. We copy a bunch of Nix dependencies
-# but they're fully self-contained so we don't need Nix anymore.
-FROM scratch
-
-# Copy /nix/store
-COPY --from=builder /tmp/nix-store-closure /nix/store
-COPY --from=builder /tmp/build/result /app
-CMD ["/app/bin/hello"]

c/Makefile

@@ -1,21 +1,12 @@
-.POSIX:
-.SUFFIXES: .o
-
 CC ?= gcc
+CFLAGS += -pedantic -Wall -Wextra -O2
+
 OUT := hello
+BINDIR ?= /usr/bin
 
 SRC += main.c
 OBJ := $(SRC:.c=.o)
 
-CFLAGS += @compile_flags.txt
-CFLAGS += -ffunction-sections -fdata-sections
-
-LDFLAGS := -fwhole-program -flto
-LDFLAGS += -Wl,--gc-sections -s
-
-RM ?= rm -f
-
-.DEFAULT_GOAL: all
 .PHONY: all
 all: $(OUT)
 
@@ -33,3 +24,7 @@ fclean: clean
 .PHONY: re
 .NOTPARALLEL: re
 re: fclean all
+
+.PHONY: install
+install:
+	install -D hello ${BINDIR}/hello --mode 0755

c/compile_flags.txt

@@ -1,18 +0,0 @@
--std=c99
--pedantic
--pipe
-
--Wall
--Wcast-qual
--Wconversion
--Werror=return-type
--Werror=vla-larger-than=0
--Wextra
--Wmissing-prototypes
--Wshadow
--Wstrict-prototypes
--Wwrite-strings
-
--O2
--march=native
--mtune=native

c/default.nix

@@ -1,13 +0,0 @@
-{ stdenv, gnumake }:
-stdenv.mkDerivation {
-  name = "hello";
-
-  src = ./.;
-  nativeBuildInputs = [ gnumake ];
-
-  enableParallelBuilding = true;
-
-  installPhase = ''
-    install -D hello $out/bin/hello --mode 0755
-  '';
-}

c/flake.nix

@@ -8,37 +8,20 @@
     let
       forAllSystems =
         function:
-        nixpkgs.lib.genAttrs [
-          "x86_64-linux"
-          "aarch64-linux"
-          "x86_64-darwin"
-          "aarch64-darwin"
-          "i686-linux"
-          "mipsel-linux"
-          "powerpc64le-linux"
-        ] (system: function nixpkgs.legacyPackages.${system});
+        nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed (
+          system: function nixpkgs.legacyPackages.${system}
+        );
     in
     rec {
       devShells = forAllSystems (pkgs: {
-        default = pkgs.mkShell {
-          hardeningDisable = [ "fortify" ];
-          inputsFrom = pkgs.lib.attrsets.attrValues packages;
-        };
+        default = pkgs.mkShell { inputsFrom = [ packages.${pkgs.system}.hello ]; };
       });
 
       packages = forAllSystems (pkgs: rec {
         default = hello;
-        hello = pkgs.callPackage ./default.nix { };
+        hello = pkgs.callPackage ./hello.nix { };
       });
 
-      overlays.default = final: prev: { hello = final.callPackage ./default.nix { }; };
-
-      apps = forAllSystems (pkgs: rec {
-        default = hello;
-        hello = {
-          program = "${packages.${pkgs.system}.hello}/bin/hello";
-          type = "app";
-        };
-      });
+      overlays.default = final: prev: { hello = prev.callPackage ./default.nix { }; };
     };
 }

c/hello.nix

@@ -0,0 +1,7 @@
+{ stdenv }:
+stdenv.mkDerivation {
+  name = "hello";
+  src = ./.;
+
+  env.BINDIR = "${placeholder "out"}/bin";
+}

c/main.c

@@ -1,16 +1,11 @@
+#include <stdio.h>
 #include <stdlib.h>
-#include <unistd.h>
-
-#define lengthof(sstr) (sizeof (sstr) / sizeof *(sstr))
-#define sstr_len(sstr) (lengthof(sstr) - 1)
-#define sstr_unpack(sstr) (sstr), (sstr_len(sstr))
-
-static const char GREETING[] = "hello, world!\n";
 
 int main(void)
 {
-    return (
-        write(STDOUT_FILENO, sstr_unpack(GREETING))
-        == sstr_len(GREETING)
-    ) ? EXIT_SUCCESS : EXIT_FAILURE;
+    char greet[] = "hello, world!\n";
+    int written = printf("%s", greet);
+
+    return written == (sizeof(greet) - 1)
+        ? EXIT_SUCCESS : EXIT_FAILURE;
 }

c/tokei.toml

@@ -1,4 +0,0 @@
-columns = 80
-sort = "lines"
-types = ["C", "C Header", "Makefile", "Markdown"]
-treat_doc_strings_as_comments = true