64 lines
1.2 KiB
Go
64 lines
1.2 KiB
Go
|
package buildfile
|
||
|
|
|
||
|
|
import (
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
type instruction_type byte
|
||
|
|
|
||
|
|
const (
|
||
|
|
// INSTALL one or more package(s)
|
||
|
|
INSTALL instruction_type = iota
|
||
|
|
// UPDATE all installed packages candidates
|
||
|
|
UPDATE
|
||
|
|
// REMOVE one or more package(s)
|
||
|
|
REMOVE
|
||
|
|
// SERVICE management (enable, disable, start, stop, restart, reload)
|
||
|
|
SERVICE
|
||
|
|
// CONF edits configuration files
|
||
|
|
CONF
|
||
|
|
)
|
||
|
|
|
||
|
|
// instruction is self-explanatory
|
||
|
|
type instruction struct {
|
||
|
|
Type instruction_type
|
||
|
|
// Sub command instruction-type-specific
|
||
|
|
Sub []string
|
||
|
|
Args string
|
||
|
|
}
|
||
|
|
|
||
|
|
// createInstruction from a raw line
|
||
|
|
func createInstruction(raw string) (*instruction, error) {
|
||
|
|
|
||
|
|
// 1. fail if invalid base syntax 'cmd args...'
|
||
|
|
// where command is 3 letters
|
||
|
|
if len(raw) < 5 || len(strings.Trim(raw[0:3], " ")) < 3 || raw[1] == ' ' || raw[3] != ' ' {
|
||
|
|
return nil, ErrInvalidSyntax
|
||
|
|
}
|
||
|
|
|
||
|
|
// 2. prepare instruction
|
||
|
|
inst := &instruction{
|
||
|
|
Type: INSTALL,
|
||
|
|
Sub: make([]string, 0),
|
||
|
|
Args: raw[4:],
|
||
|
|
}
|
||
|
|
|
||
|
|
// 3. Extract instruction type
|
||
|
|
switch raw[0:3] {
|
||
|
|
case "ins":
|
||
|
|
inst.Type = INSTALL
|
||
|
|
case "upd":
|
||
|
|
inst.Type = UPDATE
|
||
|
|
case "del":
|
||
|
|
inst.Type = REMOVE
|
||
|
|
case "ser":
|
||
|
|
inst.Type = SERVICE
|
||
|
|
case "cnf":
|
||
|
|
inst.Type = CONF
|
||
|
|
default:
|
||
|
|
return nil, ErrUnknownInstruction
|
||
|
|
}
|
||
|
|
|
||
|
|
return inst, nil
|
||
|
|
}
|