74 lines
2.2 KiB
Go
74 lines
2.2 KiB
Go
package process
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"strconv"
|
|
|
|
"dappco.re/go/core"
|
|
)
|
|
|
|
// ErrProgramNotFound is returned when Find cannot locate the binary on PATH.
|
|
// Callers may use core.Is to detect this condition.
|
|
var ErrProgramNotFound = core.E("", "program: binary not found in PATH", nil)
|
|
|
|
// Program represents a named executable located on the system PATH.
|
|
// Create one with a Name, call Find to resolve its path, then Run or RunDir.
|
|
//
|
|
// p := &process.Program{Name: "go"}
|
|
type Program struct {
|
|
// Name is the binary name (e.g. "go", "node", "git").
|
|
Name string
|
|
// Path is the absolute path resolved by Find.
|
|
// If empty, Run and RunDir fall back to Name for OS PATH resolution.
|
|
Path string
|
|
}
|
|
|
|
// Find resolves the program's absolute path using exec.LookPath.
|
|
// Returns ErrProgramNotFound (wrapped) if the binary is not on PATH.
|
|
//
|
|
// err := p.Find()
|
|
func (p *Program) Find() error {
|
|
if p.Name == "" {
|
|
return core.E("program.find", "program name is empty", nil)
|
|
}
|
|
path, err := execLookPath(p.Name)
|
|
if err != nil {
|
|
return core.E("program.find", core.Concat(strconv.Quote(p.Name), ": not found in PATH"), ErrProgramNotFound)
|
|
}
|
|
p.Path = path
|
|
return nil
|
|
}
|
|
|
|
// Run executes the program with args in the current working directory.
|
|
// Returns trimmed combined stdout+stderr output and any error.
|
|
//
|
|
// out, err := p.Run(ctx, "version")
|
|
func (p *Program) Run(ctx context.Context, args ...string) (string, error) {
|
|
return p.RunDir(ctx, "", args...)
|
|
}
|
|
|
|
// RunDir executes the program with args in dir.
|
|
// Returns trimmed combined stdout+stderr output and any error.
|
|
// If dir is empty, the process inherits the caller's working directory.
|
|
//
|
|
// out, err := p.RunDir(ctx, "/workspace", "test", "./...")
|
|
func (p *Program) RunDir(ctx context.Context, dir string, args ...string) (string, error) {
|
|
binary := p.Path
|
|
if binary == "" {
|
|
binary = p.Name
|
|
}
|
|
|
|
var out bytes.Buffer
|
|
cmd := execCommandContext(ctx, binary, args...)
|
|
cmd.Stdout = &out
|
|
cmd.Stderr = &out
|
|
if dir != "" {
|
|
cmd.Dir = dir
|
|
}
|
|
|
|
if err := cmd.Run(); err != nil {
|
|
return string(bytes.TrimSpace(out.Bytes())), core.E("program.run", core.Concat(strconv.Quote(p.Name), ": command failed"), err)
|
|
}
|
|
return string(bytes.TrimSpace(out.Bytes())), nil
|
|
}
|