nss: use certutil from $PATH if found on macOS (#71)

Fixes #70

Thanks to @hostep for testing and fixing the patch.

AUTHORS

@@ -1,3 +1,11 @@
-# This source code refers to The Go Authors for copyright purposes.
-# The master list of authors is in the main Go distribution,
-# visible at https://tip.golang.org/AUTHORS.
+# This is the list of mkcert authors for copyright purposes.
+#
+# This does not necessarily list everyone who has contributed code, since in
+# some cases, their employer may be the copyright holder.  To see the full list
+# of contributors, see the revision history in source control.
+
+Google LLC
+Adam Shannon
+Chad Retz
+Travis Campbell
+Carl Henrik Lunde

CONTRIBUTING.md

@@ -1,28 +0,0 @@
-# How to Contribute
-
-We'd love to accept your patches and contributions to this project. There are
-just a few small guidelines you need to follow.
-
-## Contributor License Agreement
-
-Contributions to this project must be accompanied by a Contributor License
-Agreement. You (or your employer) retain the copyright to your contribution;
-this simply gives us permission to use and redistribute your contributions as
-part of the project. Head over to <https://cla.developers.google.com/> to see
-your current agreements on file or to sign a new one.
-
-You generally only need to submit a CLA once, so if you've already submitted one
-(even if it was for a different project), you probably don't need to do it
-again.
-
-## Code reviews
-
-All submissions, including submissions by project members, require review. We
-use GitHub pull requests for this purpose. Consult
-[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
-information on using pull requests.
-
-## Community Guidelines
-
-This project follows [Google's Open Source Community
-Guidelines](https://opensource.google.com/conduct/).

CONTRIBUTORS

@@ -1,3 +0,0 @@
-# This source code was written by the Go contributors.
-# The master list of contributors is in the main Go distribution,
-# visible at https://tip.golang.org/CONTRIBUTORS.

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2018 The Go Authors. All rights reserved.
+Copyright (c) 2018 The mkcert Authors. All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are

PATENTS

@@ -1,22 +0,0 @@
-Additional IP Rights Grant (Patents)
-
-"This implementation" means the copyrightable works distributed by
-Google as part of the Go project.
-
-Google hereby grants to You a perpetual, worldwide, non-exclusive,
-no-charge, royalty-free, irrevocable (except as stated in this section)
-patent license to make, have made, use, offer to sell, sell, import,
-transfer and otherwise run, modify and propagate the contents of this
-implementation of Go, where such license applies only to those patent
-claims, both currently owned or controlled by Google and acquired in
-the future, licensable by Google that are necessarily infringed by this
-implementation of Go.  This grant does not include claims that would be
-infringed only as a consequence of further modification of this
-implementation.  If you or your agent or exclusive licensee institute or
-order or agree to the institution of patent litigation against any
-entity (including a cross-claim or counterclaim in a lawsuit) alleging
-that this implementation of Go or any code incorporated within this
-implementation of Go constitutes direct or contributory patent
-infringement, or inducement of patent infringement, then any patent
-rights granted to you under this License for this implementation of Go
-shall terminate as of the date such litigation is filed.

README.md

@@ -41,11 +41,12 @@ brew install mkcert
 brew install nss # if you use Firefox
 ```
 
-or MacPorts.
+or [MacPorts](https://www.macports.org/).
 
 ```
-sudo port sync
+sudo port selfupdate
 sudo port install mkcert
+sudo port install nss # if you use Firefox
 ```
 
 ### Linux
@@ -89,6 +90,12 @@ On Windows, use Chocolatey
 choco install mkcert
 ```
 
+or use Scoop
+
+```
+scoop install mkcert
+```
+
 or build from source (requires Go 1.10+), or use [the pre-built binaries](https://github.com/FiloSottile/mkcert/releases).
 
 ## Supported root stores
@@ -131,7 +138,3 @@ Installing in the trust store does not require the CA key, so you can export the
 * run `mkcert -install`
 
 Remember that mkcert is meant for development purposes, not production, so it should not be used on end users' machines, and that you should *not* export or share `rootCA-key.pem`.
-
----
-
-This is not an official Google project, just some code that happens to be owned by Google.

truststore_nss.go

@@ -28,13 +28,17 @@ func init() {
 
 	switch runtime.GOOS {
 	case "darwin":
-		out, err := exec.Command("brew", "--prefix", "nss").Output()
+		var err error
+		certutilPath, err = exec.LookPath("certutil")
 		if err != nil {
-			return
+			var out []byte
+			out, err = exec.Command("brew", "--prefix", "nss").Output()
+			if err != nil {
+				return
+			}
+			certutilPath = filepath.Join(strings.TrimSpace(string(out)), "bin", "certutil")
+			_, err = os.Stat(certutilPath)
 		}
-		certutilPath = filepath.Join(strings.TrimSpace(string(out)), "bin", "certutil")
-
-		_, err = os.Stat(certutilPath)
 		hasCertutil = err == nil
 
 	case "linux":