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deactivate.go
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deactivate.go
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package lowprofile
import (
"bufio"
"fmt"
"github.com/kellyp/lowprofile/Godeps/_workspace/src/github.com/codegangsta/cli"
"github.com/kellyp/lowprofile/Godeps/_workspace/src/gopkg.in/mattes/go-expand-tilde.v1"
"os"
"regexp"
"errors"
)
func BeforeDeactivateProfile(c *cli.Context) error {
shell := os.Getenv("SHELL")
if Shells()[shell] == "" {
output := fmt.Sprintf("Sorry, %s is not a supported shell", shell)
fmt.Println(output)
return errors.New(output)
}
var filename, _ = tilde.Expand(Shells()[shell])
if _, err := os.Stat(filename); os.IsNotExist(err) {
output := fmt.Sprintf("File %s not found", Shells()[shell])
fmt.Println(output)
return errors.New(output)
}
return nil
}
func DeactivateProfile(c *cli.Context) {
Debugln("checking shell")
shell := os.Getenv("SHELL")
Debugf("the shell is %s", shell)
profile := os.Getenv(AWS_PROFILE)
if len(profile) > 0 {
fmt.Printf("deactivating profile %s\n", profile)
} else {
fmt.Println("there is currently no active profile")
}
var filename, err = checkForShell()
filename, err = tilde.Expand(filename)
if err != nil {
panic(err)
}
found, lines := scanFileForVariableAndComment(filename, profileVariable)
if found {
writeFile(filename, lines)
}
}
func scanFileForVariableAndComment(filename string, variable string) (bool, []string) {
file, err := os.Open(filename)
if err != nil {
panic(err)
}
defer file.Close()
var lines []string
found := false
regex := regexp.MustCompile(fmt.Sprintf("\\#*\\s*(export\\s+%s=\\w*)", variable))
replace := "# ${1}"
scanner := bufio.NewScanner(file)
for scanner.Scan() {
text := scanner.Text()
if regex.MatchString(text) {
found = true
text = regex.ReplaceAllString(text, replace)
}
lines = append(lines, text)
Debugln(text)
}
if err := scanner.Err(); err != nil {
panic(err)
}
return found, lines
}