Remove the makefile and all references to it in CONTRIBUTING.md and R…

…EADME.md

CONTRIBUTING.md

@@ -23,7 +23,8 @@ Before you submit your pull request consider the following guidelines:
 * Run the full test suite.
 
      ```shell
-     make test
+     go build
+     go test -timeout 10s -v ./...
      ```
 * Commit your changes using a descriptive commit message.
 
@@ -32,12 +33,6 @@ Before you submit your pull request consider the following guidelines:
      ```
   Note: the optional commit `-a` command line option will automatically "add" and "rm" edited files.
 
-* Build your changes locally to ensure all the tests pass:
-
-    ```shell
-    make test
-    ```
-
 * Push your branch to GitHub:
 
     ```shell
@@ -96,10 +91,11 @@ After your pull request is merged, you can safely delete your branch and pull th
 * Source files must be formatted with `gofmt` and updated with `go fix` before submission.
 
     ```shell
-    make pretty
+    go fmt
+    go fix
     ```
-* Source files should be inspected by `go vet` and `golint`. Since there may be false positives with both, ignored warnings require justification but won't necessarily block changes.
+* Source files should be inspected by `go vet`. Since there may be false positives with both, ignored warnings require justification but won't necessarily block changes.
 
     ```shell
-    make criticism
+    go vet
     ```

README.md

@@ -52,7 +52,7 @@ As of the 2.0 release, `docker-credential-gcr` no longer supports generalized [`
 
 ### Building from Source
 
-The program in this repository is written with the Go programming language and built with `make`. These instructions assume that [**Go 1.11+**](https://golang.org/) and `make` are installed on a \*nix system.
+The program in this repository is written with the Go programming language and can be built with `go build`. These instructions assume you are using [**Go 1.13+**](https://golang.org/) or higher.
 
 You can download the source code, compile the binary, and put it in your `$GOPATH` with `go get`.
 
@@ -62,17 +62,17 @@ go get -u github.com/GoogleCloudPlatform/docker-credential-gcr
 
 If `$GOPATH/bin` is in your system `$PATH`, this will also automatically install the compiled binary. You can confirm using `which docker-credential-gcr` and continue to the [section on Configuration and Usage](#configuration-and-usage).
 
-Alternatively, you can use `make` to build the program. The executable will be output to the `bin` directory inside the repository.
+Alternatively, you can use `go build` to build the program. This creates a `docker-credential-gcr` executable.
 
 ```shell
 cd $GOPATH/src/github.com/GoogleCloudPlatform/docker-credential-gcr
-make
+go build
 ```
 
 Then, you can put that binary in your `$PATH` to make it visible to `docker`. For example, if `/usr/bin` is present in your system path:
 
 ```shell
-sudo mv ./bin/docker-credential-gcr /usr/bin/docker-credential-gcr
+sudo mv ./docker-credential-gcr /usr/bin/docker-credential-gcr
 ```
 
 ## Configuration and Usage