Generate checksum on build

CHANGELOG.md

@@ -5,6 +5,7 @@
 - Fix echo does not break test execution results
 - Add bashunit facade to enable custom assertions
 - Document how to verify the `sha256sum` of the final executable
+- Generate checksum on build
 - Enable display execution time on macOS with `SHOW_EXECUTION_TIME`
 - Support for displaying the clock without `perl` (for non-macOS)
 - Add `-l|--log-junit <log.xml>` option

build.sh

@@ -1,16 +1,43 @@
 #!/bin/bash
 
-mkdir -p bin
+source src/check_os.sh
 
-output_file="bin/bashunit"
+function generate_bin() {
+  local output_file=$1
+  echo '#!/usr/bin/env bash' > bin/temp.sh
+
+  echo "Generating bashunit in the 'bin' folder..."
+  cat src/*.sh >> bin/temp.sh
+  cat bashunit >> bin/temp.sh
+  grep -v '^source' bin/temp.sh > "$output_file"
+  rm bin/temp.sh
+  chmod u+x "$output_file"
+}
+
+function generate_checksum() {
+  if [[ "$_OS" == "Windows" ]]; then
+    return
+  fi
+
+  local file=$1
+  if [[ "$_OS" == "OSX" ]]; then
+    checksum=$(shasum -a 256 "$file")
+  elif [[ "$_OS" == "Linux" ]]; then
+    checksum=$(sha256sum "$file")
+  fi
 
-echo '#!/usr/bin/env bash' > bin/temp.sh
+  echo "$checksum" > bin/checksum
+  echo "$checksum"
+}
+
+########################
+######### MAIN #########
+########################
+
+mkdir -p bin
+output_file="bin/bashunit"
 
-echo "Generating bashunit in the 'bin' folder..."
-cat src/*.sh >> bin/temp.sh
-cat bashunit >> bin/temp.sh
-grep -v '^source' bin/temp.sh > "$output_file"
-rm bin/temp.sh
-chmod u+x "$output_file"
+generate_bin "$output_file"
+generate_checksum "$output_file"
 
 echo "⚡️Build completed⚡️"