Initial code add for macros

command.go

@@ -32,23 +32,20 @@ import (
 
 type command []string
 
-func (c command) expandEnv() []string {
-	var args []string
-	for _, value := range c {
-		args = append(args, os.ExpandEnv(value))
-	}
-
-	return args
-}
-
 func (c command) process(dir string, flags int) error {
-	if len(c) < 1 {
+	var args []string
+	args = appendExpEnv(args, c)
+
+	var cmd *exec.Cmd
+	switch {
+	case len(args) == 0:
 		return fmt.Errorf("command element is invalid")
+	case len(args) == 1:
+		cmd = exec.Command(args[0])
+	default:
+		cmd = exec.Command(args[0], args[1:]...)
 	}
 
-	args := c.expandEnv()
-
-	cmd := exec.Command(args[0], args[1:]...)
 	cmd.Dir = dir
 	cmd.Stderr = os.Stderr
 	cmd.Stdout = os.Stdout

macro.go

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
+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 macro struct {
+	Prefix []string
+	Suffix []string
+}
+
+func (m macro) process(dir string, params []string, flags int) error {
+	var args []string
+	args = appendExpEnv(args, m.Prefix)
+	args = appendExpEnv(args, params)
+	args = appendExpEnv(args, m.Suffix)
+
+	var cmd *exec.Cmd
+	switch {
+	case len(args) == 0:
+		return fmt.Errorf("macro element is invalid")
+	case len(args) == 1:
+		cmd = exec.Command(args[0])
+	default:
+		cmd = exec.Command(args[0], args[1:]...)
+	}
+
+	cmd.Dir = dir
+	cmd.Stderr = os.Stderr
+	cmd.Stdout = os.Stdout
+	cmd.Stdin = os.Stdin
+
+	if flags&flagVerbose == flagVerbose {
+		log.Printf("executing macro %s", strings.Join(args, " "))
+	}
+
+	return cmd.Run()
+}

task.go

@@ -24,13 +24,14 @@ package main
 
 import "fmt"
 
-type task struct {
-	Deps  []string
-	Links []link
-	Cmds  []command
+type taskDef struct {
+	Deps   []string
+	Links  []link
+	Cmds   []command
+	Macros []macro
 }
 
-func (t *task) process(taskName, srcDir, dstDir string, conf *config, flags int) error {
+func (t *taskDef) process(taskName, srcDir, dstDir string, conf *config, flags int) error {
 	handled, ok := conf.tasksHandled[taskName]
 	if ok && handled {
 		return nil
@@ -49,6 +50,24 @@ func (t *task) process(taskName, srcDir, dstDir string, conf *config, flags int)
 		}
 	}
 
+	for _, macro := range t.Macros {
+		if len(macro) == 0 {
+			continue
+		}
+
+		macroName := macro[0]
+		macroParams := macro[1:]
+
+		depMacro, ok := conf.Macros[macroName]
+		if !ok {
+			return fmt.Errorf("macro dependency not found %s", macroName)
+		}
+
+		if err := depMacro.process(dstDir, macroParams, flags); err != nil {
+			return err
+		}
+	}
+
 	if flags&flagNoLink == 0 {
 		for _, currLink := range t.Links {
 			if err := currLink.process(srcDir, dstDir, flags); err != nil {

util.go

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
+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 "os"
+
+func appendExpEnv(dst, src []string) []string {
+	for _, value := range src {
+		dst = append(dst, os.ExpandEnv(value))
+	}
+
+	return dst
+}