feat: Allow overriding fpm destination for binaries

Some packagers may want to put binaries in a location other than
/usr/local/bin. This allows one to override the destination for
binaries when using fpm, using the `fpm.bindir` config key.

config/config.go

@@ -137,6 +137,7 @@ type FPM struct {
 	Maintainer   string            `yaml:",omitempty"`
 	Description  string            `yaml:",omitempty"`
 	License      string            `yaml:",omitempty"`
+	Bindir       string            `yaml:",omitempty"`
 	Files        map[string]string `yaml:",omitempty"`
 
 	// Capture all undefined fields and should be empty after loading

docs/100-fpm.md

@@ -43,6 +43,9 @@ fpm:
     - svn
     - bash
 
+  # Override default /usr/local/bin destination for binaries
+  bindir: /usr/bin
+
   # Files or directories to add to your package (beyond the binary).
   # Keys are source paths to get the files from.
   # Values are the destination locations of the files in the package.

pipeline/fpm/fpm.go

@@ -75,8 +75,13 @@ func create(ctx *context.Context, format, folder, arch string, binaries []contex
 	log.WithField("file", file).WithField("workdir", dir).Info("creating fpm archive")
 	var options = basicOptions(ctx, dir, format, arch, file)
 
+	bindir := "/usr/local/bin"
+	if ctx.Config.FPM.Bindir != "" {
+		bindir = ctx.Config.FPM.Bindir
+	}
+
 	for _, binary := range binaries {
-		// This basically tells fpm to put the binary in the /usr/local/bin
+		// This basically tells fpm to put the binary in the bindir, e.g. /usr/local/bin
 		// binary=/usr/local/bin/binary
 		log.WithField("path", binary.Path).
 			WithField("name", binary.Name).
@@ -84,7 +89,7 @@ func create(ctx *context.Context, format, folder, arch string, binaries []contex
 		options = append(options, fmt.Sprintf(
 			"%s=%s",
 			binary.Path,
-			filepath.Join("/usr/local/bin", binary.Name),
+			filepath.Join(bindir, binary.Name),
 		))
 	}