Release v0.3.0

vendor/github.com/btcsuite/btcd/integration/rpctest/btcd.go

@@ -0,0 +1,62 @@
+// Copyright (c) 2017 The btcsuite developers
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
+
+package rpctest
+
+import (
+	"fmt"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"sync"
+)
+
+var (
+	// compileMtx guards access to the executable path so that the project is
+	// only compiled once.
+	compileMtx sync.Mutex
+
+	// executablePath is the path to the compiled executable. This is the empty
+	// string until btcd is compiled. This should not be accessed directly;
+	// instead use the function btcdExecutablePath().
+	executablePath string
+)
+
+// btcdExecutablePath returns a path to the btcd executable to be used by
+// rpctests. To ensure the code tests against the most up-to-date version of
+// btcd, this method compiles btcd the first time it is called. After that, the
+// generated binary is used for subsequent test harnesses. The executable file
+// is not cleaned up, but since it lives at a static path in a temp directory,
+// it is not a big deal.
+func btcdExecutablePath() (string, error) {
+	compileMtx.Lock()
+	defer compileMtx.Unlock()
+
+	// If btcd has already been compiled, just use that.
+	if len(executablePath) != 0 {
+		return executablePath, nil
+	}
+
+	testDir, err := baseDir()
+	if err != nil {
+		return "", err
+	}
+
+	// Build btcd and output an executable in a static temp path.
+	outputPath := filepath.Join(testDir, "btcd")
+	if runtime.GOOS == "windows" {
+		outputPath += ".exe"
+	}
+	cmd := exec.Command(
+		"go", "build", "-o", outputPath, "github.com/btcsuite/btcd",
+	)
+	err = cmd.Run()
+	if err != nil {
+		return "", fmt.Errorf("Failed to build btcd: %v", err)
+	}
+
+	// Save executable path so future calls do not recompile.
+	executablePath = outputPath
+	return executablePath, nil
+}