Really fix the Windows CI build

This works around a weird problem with make + bash, where there is some
sort of mismatch between the MinGW programs and the built-in Windows
ones. It may happen because Jaunch's Makefile targets call shell scripts
that require bash, and somehow the wrong bash is chosen, which triggers
a Windows error about how WSL needs to be installed.

I'm mostly just speculating. But whatever is actually going on, in this
case, using a shebang of `#!/usr/bin/env bash` avoids the issue.

See also actions/runner-images#7253.

.github/workflows/build.yml

@@ -24,12 +24,6 @@ jobs:
         java-version: '21'
         cache: 'gradle'
 
-    - name: Enable MinGW
-      if: runner.os == 'Windows'
-      # https://stackoverflow.com/a/77298592/1207769
-      run: |
-        $env:PATH = "C:\msys64\usr\bin;$env:PATH"
-
     - name: Build
       run: make compile-all
 

bin/app.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 cd "$(dirname "$0")/.."
 echo

bin/clean.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 cd "$(dirname "$0")/.."
 echo

bin/compile-configurator.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 cd "$(dirname "$0")/.."
 echo

bin/compile-launcher.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 cd "$(dirname "$0")/.."
 echo

bin/help.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 echo "Available targets:
 	clean            - remove build files and directories
 	compile-launcher - compile the native launcher (C)

bin/test.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 cd "$(dirname "$0")/.."
 echo