package: xtool/cppkg

xtool/cppkg/command.go

@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2025 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cppkg
+
+import (
+	"os"
+	"os/exec"
+	"strings"
+)
+
+var (
+	// ErrNotFound is the error resulting if a path search failed to find
+	// an executable file.
+	ErrNotFound = exec.ErrNotFound
+)
+
+// Tool represents a tool that can be executed.
+type Tool struct {
+	cmd      string
+	installs [][]string
+}
+
+// NewTool creates a new Tool instance with the specified tool and install commands.
+func NewTool(cmd string, installs []string) *Tool {
+	inst := make([][]string, len(installs))
+	for i, install := range installs {
+		inst[i] = strings.Split(install, " ")
+	}
+	return &Tool{
+		cmd:      cmd,
+		installs: inst,
+	}
+}
+
+// New creates a new command with the specified arguments.
+func (p *Tool) New(quietInstall bool, args ...string) (cmd *exec.Cmd, err error) {
+	app, err := p.Get(quietInstall)
+	if err != nil {
+		return
+	}
+	return exec.Command(app, args...), nil
+}
+
+// Get retrieves the path of the command.
+// If the command is not found, it attempts to install it using the specified
+// install commands.
+func (p *Tool) Get(quietInstall bool) (app string, err error) {
+	app, err = exec.LookPath(p.cmd)
+	if err == nil {
+		return
+	}
+	amPath, install, err := p.getAppManager()
+	if err != nil {
+		return
+	}
+	c := exec.Command(amPath, install[1:]...)
+	c.Stdout = os.Stdout
+	c.Stderr = os.Stderr
+	if err = c.Run(); err != nil {
+		return
+	}
+	return exec.LookPath(p.cmd)
+}
+
+func (p *Tool) getAppManager() (amPath string, install []string, err error) {
+	for _, install = range p.installs {
+		am := install[0]
+		if amPath, err = exec.LookPath(am); err == nil {
+			return
+		}
+	}
+	err = ErrNotFound
+	return
+}