remove support for TOML and JSON

ref #34

README.md

@@ -39,9 +39,7 @@ your `PATH`. DEB and RPM packages are also available.
 ## Usage
 
 Create a file called `Taskfile.yml` in the root of the project.
-(`Taskfile.toml` and `Taskfile.json` are also supported, but YAML is used in
-the documentation). The `cmds` attribute should contains the commands of a
-task:
+The `cmds` attribute should contains the commands of a task:
 
 ```yml
 build:
@@ -256,7 +254,7 @@ setvar:
 The above sample saves the path into a new variable which is then again echoed.
 
 You can use environment variables, task level variables and a file called
-`Taskvars.yml` (or `Taskvars.toml` or `Taskvars.json`) as source of variables.
+`Taskvars.yml` as source of variables.
 
 They are evaluated in the following order:
 

example/Taskfile.json

@@ -1,11 +0,0 @@
-{
-  "hello": {
-    "cmds": [
-      "echo \"I am going to write a file named 'output.txt' now.\"",
-      "echo \"hello\" > output.txt"
-    ],
-    "generates": [
-      "output.txt"
-    ]
-  }
-}

example/Taskfile.toml

@@ -1,6 +0,0 @@
-[hello]
-cmds = [
-  "echo \"I am going to write a file named 'output.txt' now.\"",
-  "echo \"hello\" > output.txt"
-]
-generates = ["output.txt"]

read_taskfile.go

@@ -1,13 +1,11 @@
 package task
 
 import (
-	"encoding/json"
 	"fmt"
 	"io/ioutil"
 	"path/filepath"
 	"runtime"
 
-	"github.com/BurntSushi/toml"
 	"github.com/imdario/mergo"
 	"gopkg.in/yaml.v2"
 )
@@ -43,12 +41,6 @@ func (e *Executor) readTaskfileData(path string) (tasks map[string]*Task, err er
 	if b, err := ioutil.ReadFile(path + ".yml"); err == nil {
 		return tasks, yaml.Unmarshal(b, &tasks)
 	}
-	if b, err := ioutil.ReadFile(path + ".json"); err == nil {
-		return tasks, json.Unmarshal(b, &tasks)
-	}
-	if b, err := ioutil.ReadFile(path + ".toml"); err == nil {
-		return tasks, toml.Unmarshal(b, &tasks)
-	}
 	return nil, taskFileNotFound{path}
 }
 
@@ -59,19 +51,6 @@ func (e *Executor) readTaskvarsFile() error {
 		if err := yaml.Unmarshal(b, &e.taskvars); err != nil {
 			return err
 		}
-		return nil
-	}
-	if b, err := ioutil.ReadFile(file + ".json"); err == nil {
-		if err := json.Unmarshal(b, &e.taskvars); err != nil {
-			return err
-		}
-		return nil
-	}
-	if b, err := ioutil.ReadFile(file + ".toml"); err == nil {
-		if err := toml.Unmarshal(b, &e.taskvars); err != nil {
-			return err
-		}
-		return nil
 	}
 	return nil
 }