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exectontext.go
93 lines (78 loc) · 1.53 KB
/
exectontext.go
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package model
import (
"fmt"
"os"
"strings"
"mvdan.cc/sh/shell"
)
type ExecContext struct {
path []string
envMap map[string]string
Sub []ExecContext
Alias map[string]string
}
func (o *ExecContext) SetPath(path []string) {
o.path = path
}
func (o *ExecContext) Env() map[string]string {
m := make(map[string]string)
for _, s := range o.Sub {
for k, v := range s.Env() {
m[k] = v
}
}
if o.envMap != nil {
for k, v := range o.envMap {
m[k] = v
}
}
//
o.prependPath(m)
return m
}
func (o *ExecContext) prependPath(m map[string]string) {
if o.path == nil {
return
}
if len(o.path) < 1 {
return
}
pathStr, ok := m["PATH"]
var pathParts []string
if ok && len(pathStr) > 0 {
pathParts = strings.Split(pathStr, string([]rune{os.PathListSeparator}))
}
// path
var p []string
p = append(p, o.path...)
p = append(p, pathParts...)
if len(p) > 0 {
m["PATH"] = strings.Join(p, string([]rune{os.PathListSeparator}))
}
}
func (o *ExecContext) Set(k, v string) *ExecContext {
if o.envMap == nil {
o.envMap = make(map[string]string)
}
o.envMap[k] = v
return o
}
func (o *ExecContext) ResolveAlias(args []string) []string {
var result []string = args
arg := args[0]
if str, ok := o.Alias[arg]; ok {
e := o.Env()
expanded, _ := shell.Fields(str, func(k string) string {
if v, ok := e[k]; ok {
return v
}
return fmt.Sprintf("$%s", k)
})
result = append(expanded, args[1:]...)
}
// Resolve Sub Aliases
for _, s := range o.Sub {
result = s.ResolveAlias(result)
}
return result
}