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Merge pull request #15 from RasmusLindroth/include
Use random port and parse includes
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,152 @@ | ||
| package helpers | ||
|
|
||
| import ( | ||
| "log" | ||
| "os" | ||
| "os/exec" | ||
| "path/filepath" | ||
| "strings" | ||
| ) | ||
|
|
||
| //Equal to os/exec Expand but changed ${} to $() | ||
| func replaceDollar(s string, mapping func(string) string) string { | ||
| var buf []byte | ||
| // $() is all ASCII, so bytes are fine for this operation. | ||
| i := 0 | ||
| for j := 0; j < len(s); j++ { | ||
| if s[j] == '$' && j+1 < len(s) { | ||
| if buf == nil { | ||
| buf = make([]byte, 0, 2*len(s)) | ||
| } | ||
| buf = append(buf, s[i:j]...) | ||
| name, w := getShellName(s[j+1:]) | ||
| if name == "" && w > 0 { | ||
| // Encountered invalid syntax; eat the | ||
| // characters. | ||
| } else if name == "" { | ||
| // Valid syntax, but $ was not followed by a | ||
| // name. Leave the dollar character untouched. | ||
| buf = append(buf, s[j]) | ||
| } else { | ||
| buf = append(buf, mapping(name)...) | ||
| } | ||
| j += w | ||
| i = j + 1 | ||
| } | ||
| } | ||
| if buf == nil { | ||
| return s | ||
| } | ||
| return string(buf) + s[i:] | ||
| } | ||
|
|
||
| //Equal to os/exec Expand but changed ${} to $() | ||
| func getShellName(s string) (string, int) { | ||
| switch { | ||
| case s[0] == '(': | ||
| if len(s) > 2 && isShellSpecialVar(s[1]) && s[2] == ')' { | ||
| return s[1:2], 3 | ||
| } | ||
| // Scan to closing brace | ||
| for i := 1; i < len(s); i++ { | ||
| if s[i] == ')' { | ||
| if i == 1 { | ||
| return "", 2 // Bad syntax; eat "$()"" | ||
| } | ||
| return s[1:i], i + 1 | ||
| } | ||
| } | ||
| return "", 1 // Bad syntax; eat "$(" | ||
| case isShellSpecialVar(s[0]): | ||
| return s[0:1], 1 | ||
| } | ||
| // Scan alphanumerics. | ||
| var i int | ||
| for i = 0; i < len(s) && isAlphaNum(s[i]); i++ { | ||
| } | ||
| return s[:i], i | ||
| } | ||
|
|
||
| //Equal to os/exec Expand but changed ${} to $() | ||
| func isShellSpecialVar(c uint8) bool { | ||
| switch c { | ||
| case '*', '#', '$', '@', '!', '?', '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': | ||
| return true | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| //Equal to os/exec Expand but changed ${} to $() | ||
| func isAlphaNum(c uint8) bool { | ||
| return c == '_' || '0' <= c && c <= '9' || 'a' <= c && c <= 'z' || 'A' <= c && c <= 'Z' | ||
| } | ||
|
|
||
| func runCMD(program string) string { | ||
| a := strings.Split(program, " ") | ||
| out, err := exec.Command(a[0], a[1:]...).Output() | ||
| if err != nil { | ||
| log.Printf("couldn't expand the following command in include: %s\n", program) | ||
| return "" | ||
| } | ||
| return strings.TrimSuffix(string(out), "\n") | ||
| } | ||
|
|
||
| func replaceAccent(s string, mapping func(string) string) string { | ||
| r := "" | ||
| for i := 0; i < len(s); i++ { | ||
| if s[i] == '`' && (i > 0 || s[i-1] != '\\') && i+1 < len(s) { | ||
| buf := "" | ||
| closed := false | ||
| for j := i + 1; j < len(s) && !closed; j++ { | ||
| if s[j] != '`' { | ||
| buf += string(s[j]) | ||
| } else { | ||
| closed = true | ||
| i = j | ||
| } | ||
| } | ||
| if closed { | ||
| r += mapping(buf) | ||
| } | ||
| } else { | ||
| r += string(s[i]) | ||
| } | ||
| } | ||
| return r | ||
| } | ||
|
|
||
| func ExpandCommand(s string) string { | ||
| s = replaceDollar(s, runCMD) | ||
| s = replaceAccent(s, runCMD) | ||
| return s | ||
| } | ||
|
|
||
| func checkPath(s string) []string { | ||
| var r []string | ||
| info, err := os.Stat(s) | ||
| if err != nil { | ||
| return []string{} | ||
| } | ||
| if !info.IsDir() { | ||
| cp := filepath.Clean(s) | ||
| if cp[0] == '~' { | ||
| home, _ := os.LookupEnv("HOME") | ||
| cp = home + cp[1:] | ||
| } | ||
| r = append(r, cp) | ||
| } | ||
| return r | ||
| } | ||
|
|
||
| func GetPaths(s string) ([]string, error) { | ||
| s = ExpandCommand(s) | ||
| matches, err := filepath.Glob(s) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| var paths []string | ||
| for _, m := range matches { | ||
| paths = append(paths, checkPath(m)...) | ||
| } | ||
| return paths, nil | ||
| } |
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