106 lines
2.5 KiB
Go
106 lines
2.5 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package checks
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import (
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"bytes"
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"context"
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"fmt"
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"os"
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"os/exec"
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"path/filepath"
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"runtime"
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"strings"
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"sync"
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"time"
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)
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const defaultCommandTimeout = 5 * time.Second
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var commandExistsCache sync.Map
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// CmdResult captures the basic outcome of an OS subcommand.
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type CmdResult struct {
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Stdout string
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Stderr string
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Err error
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}
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// RunCommand executes a command and returns trimmed stdout/stderr.
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func RunCommand(ctx context.Context, name string, args ...string) CmdResult {
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cmdCtx, cancel := context.WithTimeout(ctx, defaultCommandTimeout)
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defer cancel()
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resolved, ok := resolveCommandPath(name)
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if !ok {
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return CmdResult{
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Err: fmt.Errorf("command %q not available at expected absolute path", name),
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}
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}
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cmd := exec.CommandContext(cmdCtx, resolved, args...)
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var stdout, stderr bytes.Buffer
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cmd.Stdout = &stdout
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cmd.Stderr = &stderr
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err := cmd.Run()
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return CmdResult{
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Stdout: strings.TrimSpace(stdout.String()),
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Stderr: strings.TrimSpace(stderr.String()),
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Err: err,
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}
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}
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// CommandExists reports whether `cmd` exists at expected absolute path(s).
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func CommandExists(cmd string) bool {
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if cached, ok := commandExistsCache.Load(cmd); ok {
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return cached.(bool)
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}
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_, exists := resolveCommandPath(cmd)
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commandExistsCache.Store(cmd, exists)
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return exists
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}
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func resolveCommandPath(cmd string) (string, bool) {
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if filepath.IsAbs(cmd) {
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return cmd, isExecutableFile(cmd)
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}
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for _, candidate := range commandCandidates(cmd) {
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if isExecutableFile(candidate) {
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return candidate, true
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}
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}
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return "", false
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}
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func isExecutableFile(path string) bool {
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info, err := os.Stat(path)
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if err != nil || info.IsDir() {
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return false
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}
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if runtime.GOOS == "windows" {
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return true
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}
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return info.Mode().Perm()&0o111 != 0
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}
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