Adding support for commands

command.go

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+type command []string
+
+func (this *command) valid() bool {
+	return len(*this) >= 1
+}
+
+func (this *command) process(dir string, flags int) error {
+	if !this.valid() {
+		return fmt.Errorf("command element is invalid")
+	}
+
+	cmd := exec.Command((*this)[0], (*this)[1:]...)
+	cmd.Dir = dir
+	cmd.Stderr = os.Stderr
+	cmd.Stdout = os.Stdout
+
+	if flags&optVerbose == optVerbose {
+		log.Printf("executing command %s", strings.Join(*this, " "))
+	}
+
+	return cmd.Run()
+}

config.go

@@ -28,11 +28,11 @@ type config struct {
 	Tasks map[string]task
 }
 
-func (this *config) install(srcDir, dstDir, taskName string, flags int) error {
+func (this *config) process(srcDir, dstDir, taskName string, flags int) error {
 	task, ok := this.Tasks[taskName]
 	if !ok {
-		return fmt.Errorf("Task not found: '%s'", taskName)
+		return fmt.Errorf("task not found %s", taskName)
 	}
 
-	return task.install(srcDir, dstDir, this, flags)
+	return task.process(srcDir, dstDir, this, flags)
 }

homemaker.go

@@ -63,7 +63,7 @@ func parse(filename string) (*config, error) {
 			return nil, err
 		}
 	default:
-		return nil, fmt.Errorf("Unsupported configuration file format")
+		return nil, fmt.Errorf("unsupported configuration file format")
 	}
 
 	return conf, nil
@@ -116,7 +116,7 @@ func main() {
 			log.Fatal(err)
 		}
 
-		if err := conf.install(makeAbsPath(flag.Arg(1)), makeAbsPath(*dstDir), *taskName, flags); err != nil {
+		if err := conf.process(makeAbsPath(flag.Arg(1)), makeAbsPath(*dstDir), *taskName, flags); err != nil {
 			log.Fatal(err)
 		}
 	} else {

link.go

@@ -29,27 +29,25 @@ import (
 	"path"
 )
 
-func cleanPath(loc string, flags int) error {
-	verbose := flags&optVerbose == optVerbose
+type link []string
 
+func cleanPath(loc string, flags int) error {
 	if info, _ := os.Lstat(loc); info != nil {
 		if info.Mode()&os.ModeSymlink == os.ModeSymlink {
-			if verbose {
-				log.Printf("Removing symlink: '%s'", loc)
+			if flags&optVerbose == optVerbose {
+				log.Printf("removing symlink %s", loc)
 			}
 			if err := os.Remove(loc); err != nil {
 				return err
 			}
 		} else {
 			if flags&optClobber == optClobber {
-				if verbose {
-					log.Print("Clobbering path: '%s'", loc)
+				if flags&optVerbose == optVerbose {
+					log.Printf("clobbering path %s", loc)
 				}
 				if err := os.RemoveAll(loc); err != nil {
 					return err
 				}
-			} else {
-				return fmt.Errorf("Cannot create link; target already exists: '%s'", loc)
 			}
 		}
 	}
@@ -58,18 +56,15 @@ func cleanPath(loc string, flags int) error {
 }
 
 func createPath(loc string, flags int) error {
-	if flags&optForce == 0 {
-		return nil
-	}
-
-	parentDir, _ := path.Split(loc)
-
-	if _, err := os.Stat(parentDir); os.IsNotExist(err) {
-		if flags&optVerbose == optVerbose {
-			log.Printf("Force creating path: '%s'", parentDir)
-		}
-		if err := os.MkdirAll(parentDir, 0777); err != nil {
-			return err
+	if flags&optForce == optForce {
+		parentDir, _ := path.Split(loc)
+		if _, err := os.Stat(parentDir); os.IsNotExist(err) {
+			if flags&optVerbose == optVerbose {
+				log.Printf("force creating path %s", parentDir)
+			}
+			if err := os.MkdirAll(parentDir, 0777); err != nil {
+				return err
+			}
 		}
 	}
 
@@ -97,16 +92,16 @@ func (this *link) valid() bool {
 	return length >= 1 && length <= 2
 }
 
-func (this *link) install(srcDir, dstDir string, flags int) error {
+func (this *link) process(srcDir, dstDir string, flags int) error {
 	if !this.valid() {
-		return fmt.Errorf("Link element is invalid")
+		return fmt.Errorf("link element is invalid")
 	}
 
 	srcPath := path.Join(srcDir, this.source())
 	dstPath := path.Join(dstDir, this.destination())
 
 	if _, err := os.Stat(srcPath); os.IsNotExist(err) {
-		return fmt.Errorf("Source path does not exist in filesystem: '%s'", srcPath)
+		return fmt.Errorf("source path %s does not exist in filesystem", srcPath)
 	}
 
 	if err := createPath(dstPath, flags); err != nil {
@@ -118,7 +113,7 @@ func (this *link) install(srcDir, dstDir string, flags int) error {
 	}
 
 	if flags&optVerbose == optVerbose {
-		log.Printf("Linking: '%s' to '%s'", srcPath, dstPath)
+		log.Printf("linking %s to %s", srcPath, dstPath)
 	}
 
 	return os.Symlink(srcPath, dstPath)

task.go

@@ -24,27 +24,33 @@ package main
 
 import "fmt"
 
-type link []string
-
 type task struct {
-	Deps  []string
-	Links []link
+	Deps     []string
+	Links    []link
+	Commands []command
 }
 
-func (this *task) install(srcDir, dstDir string, conf *config, flags int) error {
+func (this *task) process(srcDir, dstDir string, conf *config, flags int) error {
 	for _, depName := range this.Deps {
 		depTask, ok := conf.Tasks[depName]
 		if !ok {
-			return fmt.Errorf("Task dependency not found: '%s'", depName)
+			return fmt.Errorf("task dependency not found %s", depName)
 		}
 
-		if err := depTask.install(srcDir, dstDir, conf, flags); err != nil {
+		if err := depTask.process(srcDir, dstDir, conf, flags); err != nil {
 			return err
 		}
 	}
 
 	for _, currLink := range this.Links {
-		if err := currLink.install(srcDir, dstDir, flags); err != nil {
+		if err := currLink.process(srcDir, dstDir, flags); err != nil {
+			return err
+		}
+	}
+
+	fmt.Print(this.Commands)
+	for _, currCmd := range this.Commands {
+		if err := currCmd.process(dstDir, flags); err != nil {
 			return err
 		}
 	}