fix(build): statically linked binaries for linux (#55)

.github/workflows/release.yml

@@ -31,7 +31,7 @@ jobs:
           - os: ubuntu-latest
             os_target: linux
             binary_name: timr-tui
-            arch: x86_64 # `x86_64` by default
+            arch: x86_64 # based on target 'x86_64-unknown-linux-musl' defined by `CARGO_BUILD_TARGET` in flake.nix
           - os: ubuntu-latest
             os_target: windows
             binary_name: timr-tui.exe
@@ -49,8 +49,12 @@ jobs:
         if: matrix.os_target == 'windows'
         run: nix build .#windows
 
-      - name: Build (linux/macos)
-        if: matrix.os_target != 'windows'
+      - name: Build (linux)
+        if: matrix.os_target == 'linux'
+        run: nix build .#linuxStatic
+
+      - name: Build (macos)
+        if: matrix.os_target == 'macos'
         run: nix build
 
       - name: Copy artifact

Cargo.lock

@@ -1191,7 +1191,7 @@ dependencies = [
 
 [[package]]
 name = "timr-tui"
-version = "1.0.0"
+version = "1.1.0-alpha"
 dependencies = [
  "clap",
  "color-eyre",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "timr-tui"
-version = "1.0.0"
+version = "1.1.0-alpha"
 description = "TUI to organize your time: Pomodoro, Countdown, Timer."
 edition = "2021"
 rust-version = "1.84.0"

flake.nix

@@ -23,6 +23,7 @@
           minimal.rustc
           minimal.cargo
           targets.x86_64-pc-windows-gnu.latest.rust-std
+          targets.x86_64-unknown-linux-musl.latest.rust-std
         ];
       craneLib = (crane.mkLib pkgs).overrideToolchain toolchain;
 
@@ -32,19 +33,24 @@
         cargoArtifacts = craneLib.buildDepsOnly {
           src = craneLib.cleanCargoSource ./.;
         };
+        strictDeps = true;
         doCheck = false; # skip tests during nix build
       };
 
       # Native build
       timr = craneLib.buildPackage commonArgs;
 
+      # Linux build w/ statically linked binaries
+      staticLinuxBuild = craneLib.buildPackage (commonArgs
+        // {
+          CARGO_BUILD_TARGET = "x86_64-unknown-linux-musl";
+          CARGO_BUILD_RUSTFLAGS = "-C target-feature=+crt-static";
+        });
+
       # Windows cross-compilation build
       # @see https://crane.dev/examples/cross-windows.html
-      crossBuild = craneLib.buildPackage {
-        src = craneLib.cleanCargoSource ./.;
-
-        strictDeps = true;
-        doCheck = false;
+      windowsBuild = craneLib.buildPackage {
+        inherit (commonArgs) src strictDeps doCheck;
 
         CARGO_BUILD_TARGET = "x86_64-pc-windows-gnu";
 
@@ -65,7 +71,8 @@
       packages = {
         inherit timr;
         default = timr;
-        windows = crossBuild;
+        linuxStatic = staticLinuxBuild;
+        windows = windowsBuild;
       };
 
       # Development shell with all necessary tools