78 lines
1.2 KiB
Go
78 lines
1.2 KiB
Go
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package bwrap
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import "encoding/gob"
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type Builder interface {
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Len() int
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Append(args *[]string)
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}
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type FSBuilder interface {
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Path() string
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Builder
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}
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func init() {
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gob.Register(new(pairF))
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gob.Register(new(stringF))
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}
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type pairF [3]string
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func (p *pairF) Path() string {
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return p[2]
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}
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func (p *pairF) Len() int {
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return len(p) // compiler replaces this with 3
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}
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func (p *pairF) Append(args *[]string) {
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*args = append(*args, p[0], p[1], p[2])
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}
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type stringF [2]string
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func (s stringF) Path() string {
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return s[1]
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}
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func (s stringF) Len() int {
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return len(s) // compiler replaces this with 2
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}
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func (s stringF) Append(args *[]string) {
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*args = append(*args, s[0], s[1])
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}
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// Args returns a slice of bwrap args corresponding to c.
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func (c *Config) Args() (args []string) {
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builders := []Builder{
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c.boolArgs(),
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c.intArgs(),
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c.stringArgs(),
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c.pairArgs(),
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}
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// copy FSBuilder slice to builder slice
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fb := make([]Builder, len(c.Filesystem)+1)
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for i, f := range c.Filesystem {
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fb[i] = f
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}
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fb[len(fb)-1] = c.Chmod
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builders = append(builders, fb...)
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// accumulate arg count
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argc := 0
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for _, b := range builders {
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argc += b.Len()
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}
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args = make([]string, 0, argc)
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for _, b := range builders {
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b.Append(&args)
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}
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return
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}
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