First commit

Author: mvdan

LICENSE

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+Copyright (c) 2017, Daniel Martí. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of the copyright holder nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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+# unparam

main.go

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+// Copyright (c) 2017, Daniel Martí <[email protected]>
+// See LICENSE for licensing information
+
+package main
+
+import (
+	"flag"
+	"fmt"
+	"go/types"
+	"os"
+
+	"golang.org/x/tools/go/loader"
+	"golang.org/x/tools/go/ssa/ssautil"
+
+	"github.com/kisielk/gotool"
+)
+
+func main() {
+	flag.Parse()
+	if err := unusedParams(flag.Args()); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+
+func unusedParams(args []string) error {
+	paths := gotool.ImportPaths(args)
+	var conf loader.Config
+	_, err := conf.FromArgs(paths, false)
+	if err != nil {
+		return err
+	}
+	iprog, err := conf.Load()
+	if err != nil {
+		return err
+	}
+	pkgs := make(map[*types.Package]bool)
+	for _, pinfo := range iprog.InitialPackages() {
+		pkgs[pinfo.Pkg] = true
+	}
+
+	prog := ssautil.CreateProgram(iprog, 0)
+
+	prog.Build()
+	for fn := range ssautil.AllFunctions(prog) {
+		if fn.Pkg == nil || !pkgs[fn.Pkg.Pkg] {
+			continue
+		}
+		fmt.Println(fn)
+	}
+	return nil
+}