old_contents: def _go_command(ctx):
    output = ctx.attr.output
    if ctx.attr.os == "windows":
      output = output + ".exe"
  
    output_file = ctx.actions.declare_file(ctx.attr.os + "/" + ctx.attr.arch + "/" + output)
    pkg = ctx.attr.pkg
  
    ld_flags = "-s -w"
    if ctx.attr.ld:
      ld_flags = ld_flags + " " + ctx.attr.ld
  
    options = [
      "go",
      "build",
      "-o", output_file.path,
      "-compiler", "gc",
      "-gcflags", '"all=-trimpath=${GOPATH}/src"',
      "-asmflags", '"all=-trimpath=${GOPATH}/src"',
      "-ldflags", "'%s'" % ld_flags,
      "-tags", "'%s'" % ctx.attr.gotags,
      pkg,
    ]
  
    command = " ".join(options)
  
    envs = [
      "CGO_ENABLED=0",
      "GOOS="+ctx.attr.os,
      "GOARCH="+ctx.attr.arch,
      #"GOROOT_FINAL=/go",
      "GO111MODULE=on",
      "GOCACHE=${TMPDIR}/gocache"
    ]
  
    if ctx.attr.mips: # https://github.com/golang/go/issues/27260
      envs+=["GOMIPS="+ctx.attr.mips]
      envs+=["GOMIPS64="+ctx.attr.mips]
      envs+=["GOMIPSLE="+ctx.attr.mips]
      envs+=["GOMIPS64LE="+ctx.attr.mips]
    if ctx.attr.arm:
      envs+=["GOARM="+ctx.attr.arm]
  
    switchToPwd="cd ${SPWD} && "
  
    command = switchToPwd + " ".join(envs) + " " + command
  
    ctx.actions.run_shell(
      outputs = [output_file],
      command = command,
      use_default_shell_env = True,
    )
    runfiles = ctx.runfiles(files = [output_file])
    return [DefaultInfo(executable = output_file, runfiles = runfiles)]
  
  
  foreign_go_binary = rule(
    _go_command,
    attrs = {
      'pkg': attr.string(),
      'output': attr.string(),
      'os': attr.string(mandatory=True),
      'arch': attr.string(mandatory=True),
      'mips': attr.string(),
      'arm': attr.string(),
      'ld': attr.string(),
      'gotags': attr.string(),
    },
    executable = True,
  )
  
new_contents: def _go_command(ctx):
    output = ctx.attr.output
    if ctx.attr.os == "windows":
      output = output + ".exe"
  
    output_file = ctx.actions.declare_file(ctx.attr.os + "/" + ctx.attr.arch + "/" + output)
    pkg = ctx.attr.pkg
  
    ld_flags = "-s -w"
    if ctx.attr.ld:
      ld_flags = ld_flags + " " + ctx.attr.ld
  
    options = [
      "go",
      "build",
      "-o", output_file.path,
      "-compiler", "gc",
      "-gcflags", '"all=-trimpath=${GOPATH}/src"',
      "-asmflags", '"all=-trimpath=${GOPATH}/src"',
      "-ldflags", "'%s'" % ld_flags,
      "-tags", "'%s'" % ctx.attr.gotags,
      pkg,
    ]
  
    command = " ".join(options)
  
    envs = [
      "CGO_ENABLED=0",
      "GOOS="+ctx.attr.os,
      "GOARCH="+ctx.attr.arch,
      #"GOROOT_FINAL=/go",
      "GO111MODULE=on",
      "GOCACHE=${TMPDIR}/gocache"
    ]
  
    if ctx.attr.mips: # https://github.com/golang/go/issues/27260
      envs+=["GOMIPS="+ctx.attr.mips]
      envs+=["GOMIPS64="+ctx.attr.mips]
      envs+=["GOMIPSLE="+ctx.attr.mips]
      envs+=["GOMIPS64LE="+ctx.attr.mips]
    if ctx.attr.arm:
      envs+=["GOARM="+ctx.attr.arm]
  
    command = " ".join(envs) + " " + command
  
    ctx.actions.run_shell(
      outputs = [output_file],
      command = command,
      use_default_shell_env = True,
    )
    runfiles = ctx.runfiles(files = [output_file])
    return [DefaultInfo(executable = output_file, runfiles = runfiles)]
  
  
  foreign_go_binary = rule(
    _go_command,
    attrs = {
      'pkg': attr.string(),
      'output': attr.string(),
      'os': attr.string(mandatory=True),
      'arch': attr.string(mandatory=True),
      'mips': attr.string(),
      'arm': attr.string(),
      'ld': attr.string(),
      'gotags': attr.string(),
    },
    executable = True,
  )
  
subject: fix bazel not set home