Fix variables in recipes, prefix expansion, and -a switch behavior

expand.go

@@ -234,9 +234,10 @@ func expandSuffixes(input string, stem string) string {
 		}
 
 		c, w := utf8.DecodeRuneInString(input[j:])
+		expanded = append(expanded, input[i:j]...)
 		if c == '%' {
 			expanded = append(expanded, stem...)
-			i += w
+			i = j + w
 		} else {
 			j += w
 			c, w := utf8.DecodeRuneInString(input[j:])

graph.go

@@ -72,6 +72,10 @@ func (u *node) updateTimestamp() {
 			mkError(err.Error())
 		}
 	}
+
+	if rebuildall {
+		u.flags |= nodeFlagProbable
+	}
 }
 
 // Create a new node

mk.go

@@ -97,7 +97,7 @@ func mkNode(g *graph, u *node) {
 	if len(u.prereqs) == 0 {
 		if !(u.r != nil && u.r.attributes.virtual) && !u.exists {
 			wd, _ := os.Getwd()
-			mkError(fmt.Sprintf("don't know how to make %s in %s", u.name, wd))
+			mkError(fmt.Sprintf("don't know how to make %s in %s\n", u.name, wd))
 		}
 		return
 	}
@@ -200,11 +200,11 @@ func mkPrintRecipe(target string, recipe string) {
 	if nocolor {
 		fmt.Printf("%s: ", target)
 	} else {
-		fmt.Printf("%s%s%s →\n%s",
+		fmt.Printf("%s%s%s → %s",
 			ansiTermBlue+ansiTermBright+ansiTermUnderline, target,
 			ansiTermDefault, ansiTermBlue)
 	}
-	printIndented(os.Stdout, recipe, 4)
+	printIndented(os.Stdout, recipe, len(target)+3)
 	if len(recipe) == 0 {
 		os.Stdout.WriteString("\n")
 	}

parse.go

@@ -347,7 +347,7 @@ func parseRecipe(p *parser, t token) parserStateFun {
 	}
 
 	if t.typ == tokenRecipe {
-		r.recipe = stripIndentation(t.val, t.col)
+		r.recipe = expandRecipeSigils(stripIndentation(t.val, t.col), p.rules.vars)
 	}
 
 	p.rules.add(r)

recipe.go

@@ -46,15 +46,19 @@ func stripIndentation(s string, mincol int) string {
 func printIndented(out io.Writer, s string, ind int) {
 	indentation := strings.Repeat(" ", ind)
 	reader := bufio.NewReader(strings.NewReader(s))
+	firstline := true
 	for {
 		line, err := reader.ReadString('\n')
 		if len(line) > 0 {
-			io.WriteString(out, indentation)
+			if !firstline {
+				io.WriteString(out, indentation)
+			}
 			io.WriteString(out, line)
 		}
 		if err != nil {
 			break
 		}
+		firstline = false
 	}
 }