Docs & comments cleanup

ci/install-ci-libraries.sh

@@ -61,7 +61,7 @@ add-apt-repository "${REPO_NAME}"
 apt-get update
 apt-get install -y clang-$LLVM_VERSION lldb-$LLVM_VERSION lld-$LLVM_VERSION clangd-$LLVM_VERSION libc++abi-dev libunwind-dev valgrind
 
-# install zig - can't use apt-get since we require a specific hash
+# install zig - can't use apt-get since we require at least a specific commit later then the most recent tag (0.6.0)
 wget -c https://ziglang.org/builds/zig-linux-x86_64-0.6.0+0088efc4b.tar.xz --no-check-certificate
 tar -xf zig-linux-x86_64-0.6.0+0088efc4b.tar.xz
 ln -s "$PWD/zig-linux-x86_64-0.6.0+0088efc4b/zig" /usr/local/bin/zig

compiler/builtins/bitcode/.gitignore

@@ -1,3 +1,2 @@
-test.ll
-src/zig-cache
 zig-cache
+src/zig-cache

compiler/builtins/bitcode/README.md

@@ -5,31 +5,19 @@ When their implementations are simple enough (e.g. addition), they
 can be implemented directly in Inkwell.
 
 When their implementations are complex enough, it's nicer to
-implement them in a higher-level language like C (or eventually Zig),
+implement them in a higher-level language like Zig, then compile
-compile the result to LLVM bitcode, and import that bitcode into the compiler.
+the result to LLVM bitcode, and import that bitcode into the compiler.
 
-Compiling the bitcode happens automatically in a Rust build script at `compiler/gen/build.rs`.
+Compiling the bitcode happens automatically in a Rust build script at `compiler/builtins/build.rs`.
-You can find the compiled bitcode in `target/debug/build/roc_gen-[some random characters]/out/builtins.bc`.
+Then `builtins/src/bitcode/rs` staticlly imports the compiled bitcode for use in the compiler.
 
-> If you want to take a look at the human-readable LLVM IR, cd into `compiler/builtins/bitcode` and
+You can find the compiled bitcode in `target/debug/build/roc_builtins-[some random characters]/out/builtins.bc`.
-> run the following command. It should create `compiler/builtins/bitcode/lib.ll`
+There will be two directories like `roc_builtins-[some random characters]`, look for the one that has an
->
+`out` directory as a child.
-> ```bash
-> zig build-obj src/main.zig -femit-llvm-ir=test.ll -fno-emit-bin --strip 
-> ```
->
-> NOTE: The full command that we use when generating the bitcode is:
-> ```bash
-> zig build-obj src/main.zig -femit-llvm-ir=test.ll -fno-emit-bin --strip -O ReleaseSafe
-> ```
-> This is probably less readable then the first command, because it does some mangling of 
-> non-exported names, etc. But if you're hitting a bug, it may be helpful.
 
-The bitcode is a bunch of bytes that aren't particularly human-readable.
+> The bitcode is a bunch of bytes that aren't particularly human-readable.
-Since Roc is designed to be distributed as a single binary, these bytes
+> If you want to take a look at the human-readable LLVM IR, look at 
-need to be included in the raw source somewhere.
+> `target/debug/build/roc_builtins-[some random characters]/out/builtins.ll`
-
-The `llvm/src/build.rs` file statically imports these raw bytes.
 
 ## Calling bitcode functions
 

compiler/builtins/bitcode/src/main.zig

@@ -1,7 +1,5 @@
 const std = @import("std");
 const math = std.math;
-// const testing = std.testing;
-
 
 export fn atan_(num: f64) f64 {
     return math.atan(num);
@@ -14,7 +12,3 @@ export fn is_finite_(num: f64) bool {
 export fn pow_int_(base: i64, exp: i64) i64 {
     return math.pow(i64, base, exp);
 }
-
-// test "basic add functionality" {
-    // testing.expect(add(3, 7) == 10);
-// }

compiler/builtins/build.rs

@@ -1,26 +1,33 @@
+use std::convert::AsRef;
 use std::env;
-use std::io;
+use std::ffi::OsStr;
 use std::path::Path;
 use std::process::Command;
 use std::str;
 
+fn run_command<S, I>(command: &str, args: I)
+where
+    I: IntoIterator<Item = S>,
+    S: AsRef<OsStr>,
+{
+    let output_result = Command::new(OsStr::new(&command)).args(args).output();
+    match output_result {
+        Ok(output) => match output.status.success() {
+            true => (),
+            false => {
+                let error_str = match str::from_utf8(&output.stderr) {
+                    Ok(stderr) => stderr.to_string(),
+                    Err(_) => format!("Failed to run \"{}\"", command),
+                };
+                panic!("{} failed: {}", command, error_str);
+            }
+        },
+        Err(reason) => panic!("{} failed: {}", command, reason),
+    }
+}
+
 fn main() {
     let out_dir = env::var_os("OUT_DIR").unwrap();
-    let out_dir_str = out_dir.to_str().unwrap();
-    Command::new("mkdir")
-        .args(&["-p", out_dir_str])
-        .output()
-        .and_then(|r| match r.status.success() {
-            true => Ok(r),
-            false => Err(io::Error::new(
-                io::ErrorKind::InvalidData,
-                match str::from_utf8(&r.stderr) {
-                    Ok(stderr) => stderr,
-                    Err(_) => "Failed make out directory",
-                },
-            )),
-        })
-        .unwrap();
 
     // "." is relative to where "build.rs" is
     let src_path = Path::new(".").join("bitcode").join("src").join("main.zig");
@@ -36,8 +43,9 @@ fn main() {
     let emit_ir_arg = "-femit-llvm-ir=".to_owned() + dest_ll;
     println!("Compiling zig llvm-ir to: {}", dest_ll);
 
-    let zig_output = Command::new("zig")
+    run_command(
-        .args(&[
+        "zig",
+        &[
             "build-obj",
             src_path_str,
             &emit_ir_arg,
@@ -47,38 +55,14 @@ fn main() {
             "ReleaseFast",
             "--cache-dir",
             zig_cache_dir_str,
-        ])
+        ],
-        .output()
+    );
-        .expect("Failed to start zig build-obj");
-    match zig_output.status.success() {
-        true => (),
-        false => {
-            let error_str = match str::from_utf8(&zig_output.stderr) {
-                Ok(stderr) => stderr,
-                Err(_) => "Failed to build zig",
-            };
-            panic!("zig build-obj failed: {}", error_str);
-        }
-    };
 
     let dest_bc_path = Path::new(&out_dir).join("builtins.bc");
     let dest_bc = dest_bc_path.to_str().expect("Invalid dest bc path");
     println!("Compiling bitcode to: {}", dest_bc);
 
-    Command::new("llvm-as")
+    run_command("llvm-as", &[dest_ll, "-o", dest_bc]);
-        .args(&[dest_ll, "-o", dest_bc])
-        .output()
-        .expect("Failed to start llvm-ar");
-    match zig_output.status.success() {
-        true => (),
-        false => {
-            let error_str = match str::from_utf8(&zig_output.stderr) {
-                Ok(stderr) => stderr,
-                Err(_) => "Failed to run llvm-ar",
-            };
-            panic!("llvm-ar failed: {}", error_str);
-        }
-    };
 
     println!("cargo:rerun-if-changed=build.rs");
     println!("cargo:rerun-if-changed={}", src_path_str);

compiler/builtins/main.ll

@@ -1,563 +0,0 @@
-; ModuleID = 'main'
-source_filename = "main"
-target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64-unknown-macos-gnu"
-
-%std.macho.mach_header_64 = type { i32, i32, i32, i32, i32, i32, i32, i32 }
-
-@_mh_execute_header = weak_odr dso_local unnamed_addr global %std.macho.mach_header_64 undef, align 4
-@0 = internal unnamed_addr constant [4 x double] [double 0x3FDDAC670561BB4F, double 0x3FE921FB54442D18, double 0x3FEF730BD281F69B, double 0x3FF921FB54442D18], align 8
-@1 = internal unnamed_addr constant [4 x double] [double 0x3C7A2B7F222F65E2, double 0x3C81A62633145C07, double 0x3C7007887AF0CBBD, double 0x3C91A62633145C07], align 8
-
-; Function Attrs: nobuiltin nounwind
-define double @atan_(double %0) local_unnamed_addr #0 {
-Entry:
-  %x.sroa.0.i.i.i = alloca i32, align 4
-  %1 = bitcast double %0 to i64
-  %2 = lshr i64 %1, 32
-  %3 = trunc i64 %2 to i32
-  %4 = and i32 %3, 2147483647
-  %5 = icmp ugt i32 %4, 1141899263
-  br i1 %5, label %Then.i.i, label %EndIf5.i.i
-
-Then.i.i:                                         ; preds = %Entry
-  %6 = fcmp uno double %0, 0.000000e+00
-  br i1 %6, label %std.math.atan.atan.exit, label %Else.i.i
-
-Else.i.i:                                         ; preds = %Then.i.i
-  %..i.i = tail call double @llvm.copysign.f64(double 0x3FF921FB54442D18, double %0) #5
-  br label %std.math.atan.atan.exit
-
-EndIf5.i.i:                                       ; preds = %Entry
-  %7 = icmp ult i32 %4, 1039925248
-  br i1 %7, label %Then7.i.i, label %Else12.i.i
-
-Then7.i.i:                                        ; preds = %EndIf5.i.i
-  %8 = icmp ult i32 %4, 1048576
-  br i1 %8, label %Then8.i.i, label %std.math.atan.atan.exit
-
-Then8.i.i:                                        ; preds = %Then7.i.i
-  %x.sroa.0.i.i.i.0.sroa_cast = bitcast i32* %x.sroa.0.i.i.i to i8*
-  call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %x.sroa.0.i.i.i.0.sroa_cast)
-  store volatile i32 undef, i32* %x.sroa.0.i.i.i, align 4
-  call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %x.sroa.0.i.i.i.0.sroa_cast)
-  br label %std.math.atan.atan.exit
-
-Else12.i.i:                                       ; preds = %EndIf5.i.i
-  %9 = and i64 %1, 9223372036854775807
-  %10 = bitcast i64 %9 to double
-  %11 = icmp ult i32 %4, 1072889856
-  br i1 %11, label %Then13.i.i, label %Else16.i.i
-
-Then13.i.i:                                       ; preds = %Else12.i.i
-  %12 = icmp ult i32 %4, 1072037888
-  br i1 %12, label %Then14.i.i, label %Else15.i.i
-
-Then14.i.i:                                       ; preds = %Then13.i.i
-  %13 = fmul double %10, 2.000000e+00
-  %14 = fadd double %13, -1.000000e+00
-  %15 = fadd double %10, 2.000000e+00
-  %16 = fdiv double %14, %15
-  br label %EndIf23.i.i
-
-Else15.i.i:                                       ; preds = %Then13.i.i
-  %17 = fadd double %10, -1.000000e+00
-  %18 = fadd double %10, 1.000000e+00
-  %19 = fdiv double %17, %18
-  br label %EndIf23.i.i
-
-Else16.i.i:                                       ; preds = %Else12.i.i
-  %20 = icmp ult i32 %4, 1073971200
-  br i1 %20, label %Then17.i.i, label %Else18.i.i
-
-Then17.i.i:                                       ; preds = %Else16.i.i
-  %21 = fadd double %10, -1.500000e+00
-  %22 = fmul double %10, 1.500000e+00
-  %23 = fadd double %22, 1.000000e+00
-  %24 = fdiv double %21, %23
-  br label %EndIf23.i.i
-
-Else18.i.i:                                       ; preds = %Else16.i.i
-  %25 = fdiv double -1.000000e+00, %10
-  br label %EndIf23.i.i
-
-EndIf23.i.i:                                      ; preds = %Else18.i.i, %Then17.i.i, %Else15.i.i, %Then14.i.i
-  %id.sroa.0.0.i.i = phi i64 [ 0, %Then14.i.i ], [ 1, %Else15.i.i ], [ 2, %Then17.i.i ], [ 3, %Else18.i.i ]
-  %x.0.i.i = phi double [ %16, %Then14.i.i ], [ %19, %Else15.i.i ], [ %24, %Then17.i.i ], [ %25, %Else18.i.i ]
-  %26 = fmul double %x.0.i.i, %x.0.i.i
-  %27 = fmul double %26, %26
-  %28 = fmul double %27, 0x3FA2B4442C6A6C2F
-  %29 = fsub double 0xBFADDE2D52DEFD9A, %28
-  %30 = fmul double %27, %29
-  %31 = fadd double %30, 0xBFB3B0F2AF749A6D
-  %32 = fmul double %27, %31
-  %33 = fadd double %32, 0xBFBC71C6FE231671
-  %34 = fmul double %27, %33
-  %35 = fadd double %34, 0xBFC999999998EBC4
-  %36 = fmul double %27, %35
-  %37 = fmul double %27, 0x3F90AD3AE322DA11
-  %38 = fadd double %37, 0x3FA97B4B24760DEB
-  %39 = fmul double %27, %38
-  %40 = fadd double %39, 0x3FB10D66A0D03D51
-  %41 = fmul double %27, %40
-  %42 = fadd double %41, 0x3FB745CDC54C206E
-  %43 = fmul double %27, %42
-  %44 = fadd double %43, 0x3FC24924920083FF
-  %45 = fmul double %27, %44
-  %46 = fadd double %45, 0x3FD555555555550D
-  %47 = fmul double %26, %46
-  %48 = getelementptr inbounds [4 x double], [4 x double]* @0, i64 0, i64 %id.sroa.0.0.i.i
-  %49 = load double, double* %48, align 8
-  %50 = fadd double %36, %47
-  %51 = fmul double %x.0.i.i, %50
-  %52 = getelementptr inbounds [4 x double], [4 x double]* @1, i64 0, i64 %id.sroa.0.0.i.i
-  %53 = load double, double* %52, align 8
-  %54 = fsub double %51, %53
-  %55 = fsub double %54, %x.0.i.i
-  %56 = fsub double %49, %55
-  %.not.i.i = icmp sgt i64 %1, -1
-  %57 = fneg double %56
-  %result.1.i.i = select i1 %.not.i.i, double %56, double %57
-  br label %std.math.atan.atan.exit
-
-std.math.atan.atan.exit:                          ; preds = %Then.i.i, %Else.i.i, %Then7.i.i, %Then8.i.i, %EndIf23.i.i
-  %merge.i.i = phi double [ %0, %Then.i.i ], [ %..i.i, %Else.i.i ], [ %0, %Then7.i.i ], [ %0, %Then8.i.i ], [ %result.1.i.i, %EndIf23.i.i ]
-  ret double %merge.i.i
-}
-
-; Function Attrs: nobuiltin norecurse nounwind readnone
-define i1 @is_finite_(double %0) local_unnamed_addr #1 {
-Entry:
-  %1 = bitcast double %0 to i64
-  %2 = and i64 %1, 9218868437227405312
-  %3 = icmp ne i64 %2, 9218868437227405312
-  ret i1 %3
-}
-
-; Function Attrs: nobuiltin nounwind readnone
-define i64 @pow_int_(i64 %0, i64 %1) local_unnamed_addr #2 {
-Entry:
-  %2 = icmp eq i64 %1, 0
-  br i1 %2, label %std.math.pow.pow.exit, label %EndIf.i.i
-
-EndIf.i.i:                                        ; preds = %Entry
-  switch i64 %0, label %EndIf5.i.i [
-    i64 0, label %std.math.pow.pow.exit
-    i64 1, label %SwitchProng35.i.i
-    i64 -1, label %Then1.i.i
-  ]
-
-Then1.i.i:                                        ; preds = %EndIf.i.i
-  %3 = srem i64 %1, 2
-  %4 = add nsw i64 %3, 2
-  %5 = srem i64 %4, 2
-  %6 = icmp slt i64 %1, 0
-  %7 = select i1 %6, i64 %5, i64 %3
-  %8 = icmp eq i64 %7, 0
-  %spec.select.i = select i1 %8, i64 1, i64 -1
-  br label %std.math.pow.pow.exit
-
-EndIf5.i.i:                                       ; preds = %EndIf.i.i
-  %9 = icmp sgt i64 %0, 0
-  %10 = icmp sgt i64 %1, 62
-  %11 = and i1 %9, %10
-  br i1 %11, label %std.math.pow.pow.exit, label %Else7.i.i
-
-Else7.i.i:                                        ; preds = %EndIf5.i.i
-  %12 = icmp slt i64 %0, 0
-  %13 = icmp sgt i64 %1, 63
-  %14 = and i1 %12, %13
-  br i1 %14, label %std.math.pow.pow.exit, label %WhileCond.i.i
-
-WhileCond.i.i:                                    ; preds = %Else7.i.i, %EndIf21.i.i
-  %acc.0.i.i = phi i64 [ %acc.1.i.i, %EndIf21.i.i ], [ 1, %Else7.i.i ]
-  %exp.0.i.i = phi i64 [ %20, %EndIf21.i.i ], [ %1, %Else7.i.i ]
-  %base.0.i.i = phi i64 [ %22, %EndIf21.i.i ], [ %0, %Else7.i.i ]
-  %15 = icmp sgt i64 %exp.0.i.i, 1
-  br i1 %15, label %WhileBody.i.i, label %WhileEnd.i.i
-
-WhileBody.i.i:                                    ; preds = %WhileCond.i.i
-  %16 = and i64 %exp.0.i.i, 1
-  %.not.i.i = icmp eq i64 %16, 0
-  br i1 %.not.i.i, label %EndIf21.i.i, label %Then14.i.i
-
-Then14.i.i:                                       ; preds = %WhileBody.i.i
-  %17 = tail call { i64, i1 } @llvm.smul.with.overflow.i64(i64 %acc.0.i.i, i64 %base.0.i.i) #5
-  %18 = extractvalue { i64, i1 } %17, 0
-  %19 = extractvalue { i64, i1 } %17, 1
-  br i1 %19, label %std.math.pow.pow.exit, label %EndIf21.i.i
-
-EndIf21.i.i:                                      ; preds = %Then14.i.i, %WhileBody.i.i
-  %acc.1.i.i = phi i64 [ %18, %Then14.i.i ], [ %acc.0.i.i, %WhileBody.i.i ]
-  %20 = lshr i64 %exp.0.i.i, 1
-  %21 = tail call { i64, i1 } @llvm.smul.with.overflow.i64(i64 %base.0.i.i, i64 %base.0.i.i) #5
-  %22 = extractvalue { i64, i1 } %21, 0
-  %23 = extractvalue { i64, i1 } %21, 1
-  br i1 %23, label %std.math.pow.pow.exit, label %WhileCond.i.i
-
-WhileEnd.i.i:                                     ; preds = %WhileCond.i.i
-  %24 = icmp eq i64 %exp.0.i.i, 1
-  %25 = select i1 %24, i64 %base.0.i.i, i64 1
-  %spec.select2.i = mul i64 %25, %acc.0.i.i
-  br label %std.math.pow.pow.exit
-
-SwitchProng35.i.i:                                ; preds = %EndIf.i.i
-  br label %std.math.pow.pow.exit
-
-std.math.pow.pow.exit:                            ; preds = %Then14.i.i, %EndIf21.i.i, %Entry, %EndIf.i.i, %EndIf5.i.i, %Else7.i.i, %SwitchProng35.i.i, %WhileEnd.i.i, %Then1.i.i
-  %26 = phi i64 [ %spec.select.i, %Then1.i.i ], [ %spec.select2.i, %WhileEnd.i.i ], [ 1, %SwitchProng35.i.i ], [ 1, %Entry ], [ undef, %EndIf5.i.i ], [ undef, %Else7.i.i ], [ %0, %EndIf.i.i ], [ undef, %EndIf21.i.i ], [ undef, %Then14.i.i ]
-  ret i64 %26
-}
-
-; Function Attrs: nounwind readnone speculatable willreturn
-declare { i64, i1 } @llvm.smul.with.overflow.i64(i64, i64) #3
-
-; Function Attrs: argmemonly nounwind willreturn
-declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #4
-
-; Function Attrs: argmemonly nounwind willreturn
-declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #4
-
-; Function Attrs: nounwind readnone speculatable willreturn
-declare double @llvm.copysign.f64(double, double) #3
-
-attributes #0 = { nobuiltin nounwind }
-attributes #1 = { nobuiltin norecurse nounwind readnone }
-attributes #2 = { nobuiltin nounwind readnone }
-attributes #3 = { nounwind readnone speculatable willreturn }
-attributes #4 = { argmemonly nounwind willreturn }
-attributes #5 = { nounwind }
-
-!llvm.module.flags = !{!0, !1}
-!llvm.dbg.cu = !{!2}
-
-!0 = !{i32 2, !"Debug Info Version", i32 3}
-!1 = !{i32 2, !"Dwarf Version", i32 4}
-!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "zig 0.6.0", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !4)
-!3 = !DIFile(filename: "main", directory: ".")
-!4 = !{!5, !12, !53, !73, !79, !133, !156, !162, !181, !319, !325}
-!5 = !DICompositeType(tag: DW_TAG_enumeration_type, name: "std.builtin.OutputMode", scope: !6, file: !6, line: 441, baseType: !7, size: 8, align: 8, elements: !8)
-!6 = !DIFile(filename: "builtin.zig", directory: "/nix/store/7k1ipq7x4b61jfhc3kwvm7zqfm5jzj2y-zig-0.6.0/lib/zig/std")
-!7 = !DIBasicType(name: "u2", size: 8, encoding: DW_ATE_unsigned)
-!8 = !{!9, !10, !11}
-!9 = !DIEnumerator(name: "Exe", value: 0)
-!10 = !DIEnumerator(name: "Lib", value: 1)
-!11 = !DIEnumerator(name: "Obj", value: 2)
-!12 = !DICompositeType(tag: DW_TAG_enumeration_type, name: "std.target.Tag", scope: !13, file: !13, line: 23, baseType: !14, size: 8, align: 8, elements: !15)
-!13 = !DIFile(filename: "target.zig", directory: "/nix/store/7k1ipq7x4b61jfhc3kwvm7zqfm5jzj2y-zig-0.6.0/lib/zig/std")
-!14 = !DIBasicType(name: "u6", size: 8, encoding: DW_ATE_unsigned)
-!15 = !{!16, !17, !18, !19, !20, !21, !22, !23, !24, !25, !26, !27, !28, !29, !30, !31, !32, !33, !34, !35, !36, !37, !38, !39, !40, !41, !42, !43, !44, !45, !46, !47, !48, !49, !50, !51, !52}
-!16 = !DIEnumerator(name: "freestanding", value: 0)
-!17 = !DIEnumerator(name: "ananas", value: 1)
-!18 = !DIEnumerator(name: "cloudabi", value: 2)
-!19 = !DIEnumerator(name: "dragonfly", value: 3)
-!20 = !DIEnumerator(name: "freebsd", value: 4)
-!21 = !DIEnumerator(name: "fuchsia", value: 5)
-!22 = !DIEnumerator(name: "ios", value: 6)
-!23 = !DIEnumerator(name: "kfreebsd", value: 7)
-!24 = !DIEnumerator(name: "linux", value: 8)
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-!321 = !{!322, !323, !324}
-!322 = !DIEnumerator(name: "Left", value: 0)
-!323 = !DIEnumerator(name: "Center", value: 1)
-!324 = !DIEnumerator(name: "Right", value: 2)
-!325 = !DICompositeType(tag: DW_TAG_enumeration_type, name: "std.spinlock.State", scope: !326, file: !326, line: 12, baseType: !183, size: 8, align: 8, elements: !327)
-!326 = !DIFile(filename: "spinlock.zig", directory: "/nix/store/7k1ipq7x4b61jfhc3kwvm7zqfm5jzj2y-zig-0.6.0/lib/zig/std")
-!327 = !{!328, !329}
-!328 = !DIEnumerator(name: "Unlocked", value: 0)
-!329 = !DIEnumerator(name: "Locked", value: 1)

compiler/builtins/src/bitcode.rs

@@ -3,7 +3,7 @@ use std::io::prelude::Read;
 use std::vec::Vec;
 
 pub fn get_bytes() -> Vec<u8> {
-    // In the build script for the gen module, we compile the builtins bitcode and set
+    // In the build script for the builtins module, we compile the builtins bitcode and set
     // BUILTINS_BC to the path to the compiled output.
     let path: &'static str = env!(
         "BUILTINS_BC",

nix/zig.nix

@@ -1,14 +1,15 @@
 { pkgs, isMacOS }:
 
-# As of 2020-10-25, building Zig from source on MacOS fails
+# We require at least specific commit of Zig after the latest tagged
-# so we just download the binary from their release page :(
+# release (0.6.0), so we just download the binaries for that commit
+
 let
-  version = "0.6.0";
+  version = "0.6.0+0088efc4b";
   osName =
     if isMacOS
       then "macos"
       else "linux";
-  archiveName = "zig-${osName}-x86_64-${version}+0088efc4b";
+  archiveName = "zig-${osName}-x86_64-${version}";
   sha256 = 
     if isMacOS
       then "665c1a7f472cfc5e0715f0ddf6ff8409fb749ac91cbbae68c443b4a37ebd058e"

nix/zls.nix

@@ -1,8 +1,7 @@
 { pkgs, zig }:
 
-# As of 2020-10-25, building zls is not available on Nix
+# As of 2020-10-25, building zls is not available on Nix. For some reason,
-# For some reason, this hangs on `zig build`. I'll try
+# this hangs on `zig build`. I'll try to figure it our later.
-# to figure it our later :(
 
 let
   rev = "e8c20351d85da8eb4bf22480045b994007284d69";

shell.nix

@@ -35,9 +35,9 @@ let
       # build libraries
       pkgs.rustup
       pkgs.cargo
+      llvm
       pkgs.valgrind
       zig
-      llvm
       # llb deps
       pkgs.libffi
       pkgs.libxml2