xcompile: add some uncommitted code from my dev machine

.gitignore

@@ -1,5 +1,6 @@
 pbf
 nodejs/
+build/
 
 *.bits
 *.sqlite

xcompile.sh

@@ -1,10 +1,8 @@
 #!/bin/bash
 set -euo pipefail
 
-# note: works with golang 1.7 but not on 1.8!
-
-# requires 'upx'
-SKIP_COMPRESSION=true;
+# ensure build directory exists
+mkdir build
 
 # ensure the compiler exits with status 0
 function assert() {
@@ -14,113 +12,53 @@ function assert() {
   fi
 }
 
-# ensure the files were compiled to the correct architecture
-declare -A matrix
-matrix["build/pbf.darwin-x64"]="Mach-O 64-bit "
-matrix["build/pbf.linux-arm"]="ELF 32-bit "
-matrix["build/pbf.linux-x64"]="ELF 64-bit "
-matrix["build/pbf.win32-x64"]="PE32 executable "
-
-function checkFiles() {
-  for path in "${!matrix[@]}"
-  do
-    expected="$path: ${matrix[$path]}";
-    actual=$(file $path);
-    actualArr=($actual);
-    start=$(printf "%s " "${actualArr[@]:0:3}");
-    if [ "${start}" != "$expected" ]; then
-      echo "invalid file architecture: $path"
-      echo "expected: $expected"
-      echo "actual: $actual"
-      echo "start: $start"
-      exit 1
-    fi
-  done
+# check the reported file class matches what's expected
+function check() {
+  actual=$(file -b ${1});
+  if [[ "${actual}" != "${2}"* ]]; then
+    echo "invalid file architecture: ${1}"
+    echo "expected: ${2}"
+    echo "actual: ${actual}"
+    echo "-${actual}-${2}-"
+    exit 1
+  fi
 }
 
-echo "[compile] linux x64";
-GOOS=linux GOARCH=amd64 go build -ldflags="-s -w" -gcflags=-trimpath=$GOPATH -asmflags=-trimpath=$GOPATH pbf.go;
-assert $?;
-chmod +x pbf;
-mv pbf build/pbf.linux-x64;
-$SKIP_COMPRESSION || upx --brute build/pbf.linux-x64;
+# if the 'UPX' bindary packer is available, use it
+# https://upx.github.io/
+function compress() {
+  [ -x "$(command -v upx)" ] && upx "${1}"
+}
 
 echo "[compile] linux arm";
-GOOS=linux GOARCH=arm go build -ldflags="-s -w" -gcflags=-trimpath=$GOPATH -asmflags=-trimpath=$GOPATH pbf.go;
-echo $?;
+env GOOS=linux GOARCH=arm go build -ldflags="-s -w" -gcflags=-trimpath="${GOPATH}" -asmflags=-trimpath="${GOPATH}";
 assert $?;
 chmod +x pbf;
 mv pbf build/pbf.linux-arm;
-$SKIP_COMPRESSION || upx --brute build/pbf.linux-arm;
+check 'build/pbf.linux-arm' 'ELF 32-bit LSB executable';
+compress 'build/pbf.linux-arm';
 
-# echo "[compile] linux i386";
-# GOOS=linux GOARCH=386 go build -ldflags="-s -w" -gcflags=-trimpath=$GOPATH -asmflags=-trimpath=$GOPATH pbf.go;
-# assert $?;
-# chmod +x pbf;
-# mv pbf build/pbf.linux-ia32;
-# $SKIP_COMPRESSION || upx --brute build/pbf.linux-ia32;
+echo "[compile] linux x64";
+env GOOS=linux GOARCH=amd64 go build -ldflags="-s -w" -gcflags=-trimpath="${GOPATH}" -asmflags=-trimpath="${GOPATH}";
+assert $?;
+chmod +x pbf;
+mv pbf build/pbf.linux-x64;
+check 'build/pbf.linux-x64' 'ELF 64-bit LSB executable';
+compress 'build/pbf.linux-x64';
 
 echo "[compile] darwin x64";
-GOOS=darwin GOARCH=amd64 go build -ldflags="-s -w" -gcflags=-trimpath=$GOPATH -asmflags=-trimpath=$GOPATH pbf.go;
+env GOOS=darwin GOARCH=amd64 go build -ldflags="-s -w" -gcflags=-trimpath="${GOPATH}" -asmflags=-trimpath="${GOPATH}";
 assert $?;
 chmod +x pbf;
 mv pbf build/pbf.darwin-x64;
-$SKIP_COMPRESSION || upx --brute build/pbf.darwin-x64;
-
-# echo "[compile] darwin i386";
-# GOOS=darwin GOARCH=386 go build -ldflags="-s -w" -gcflags=-trimpath=$GOPATH -asmflags=-trimpath=$GOPATH pbf.go;
-# assert $?;
-# chmod +x pbf;
-# mv pbf build/pbf.darwin-ia32;
-# $SKIP_COMPRESSION || upx --brute build/pbf.darwin-ia32;
+check 'build/pbf.darwin-x64' 'Mach-O 64-bit';
+# UPX disabled due to https://github.com/upx/upx/issues/187
+# compress 'build/pbf.darwin-x64';
 
 echo "[compile] windows x64";
-GOOS=windows GOARCH=386 go build -ldflags="-s -w" -gcflags=-trimpath=$GOPATH -asmflags=-trimpath=$GOPATH -o pbf.exe pbf.go;
+env GOOS=windows GOARCH=386 go build -ldflags="-s -w" -gcflags=-trimpath=${GOPATH} -asmflags=-trimpath=${GOPATH} -o pbf.exe;
 assert $?;
 chmod +x pbf.exe;
 mv pbf.exe build/pbf.win32-x64;
-$SKIP_COMPRESSION || upx --brute build/pbf.win32-x64;
-
-# echo "[compile] windows i386";
-# GOOS=windows GOARCH=386 go build -ldflags="-s -w" -gcflags=-trimpath=$GOPATH -asmflags=-trimpath=$GOPATH pbf.go;
-# assert $?;
-# chmod +x pbf.exe;
-# mv pbf.exe build/pbf.win32-ia32;
-# $SKIP_COMPRESSION || upx --brute build/pbf.win32-ia32;
-
-# echo "[compile] freebsd arm";
-# GOOS=freebsd GOARCH=arm go build -ldflags="-s -w" -gcflags=-trimpath=$GOPATH -asmflags=-trimpath=$GOPATH pbf.go;
-# assert $?;
-# chmod +x pbf;
-# mv pbf build/pbf.freebsd-arm;
-# $SKIP_COMPRESSION || upx --brute build/pbf.freebsd-arm;
-
-# echo "[compile] freebsd x64";
-# GOOS=freebsd GOARCH=amd64 go build -ldflags="-s -w" -gcflags=-trimpath=$GOPATH -asmflags=-trimpath=$GOPATH pbf.go;
-# assert $?;
-# chmod +x pbf;
-# mv pbf build/pbf.freebsd-x64;
-# $SKIP_COMPRESSION || upx --brute build/pbf.freebsd-x64;
-
-# echo "[compile] freebsd i386";
-# GOOS=freebsd GOARCH=386 go build -ldflags="-s -w" -gcflags=-trimpath=$GOPATH -asmflags=-trimpath=$GOPATH pbf.go;
-# assert $?;
-# chmod +x pbf;
-# mv pbf build/pbf.freebsd-ia32;
-# $SKIP_COMPRESSION || upx --brute build/pbf.freebsd-ia32;
-
-# echo "[compile] openbsd i386";
-# GOOS=openbsd GOARCH=386 go build -ldflags="-s -w" -gcflags=-trimpath=$GOPATH -asmflags=-trimpath=$GOPATH pbf.go;
-# assert $?;
-# chmod +x pbf;
-# mv pbf build/pbf.openbsd-ia32;
-# $SKIP_COMPRESSION || upx --brute build/pbf.openbsd-ia32;
-
-# echo "[compile] openbsd x64";
-# GOOS=openbsd GOARCH=amd64 go build -ldflags="-s -w" -gcflags=-trimpath=$GOPATH -asmflags=-trimpath=$GOPATH pbf.go;
-# assert $?;
-# chmod +x pbf;
-# mv pbf build/pbf.openbsd-x64;
-# $SKIP_COMPRESSION || upx --brute build/pbf.openbsd-x64;
-
-checkFiles
+check 'build/pbf.win32-x64' 'PE32 executable';
+compress 'build/pbf.win32-x64';