mirror of
https://github.com/caddyserver/caddy.git
synced 2024-11-22 15:19:25 +08:00
cmd: Enhance .env (dotenv) file parsing
Basic support for quoted values, newlines in quoted values, and comments. Does not support variable or command expansion.
This commit is contained in:
parent
bc15b4b0e7
commit
30b6d1f47a
58
cmd/main.go
58
cmd/main.go
|
@ -368,42 +368,68 @@ func loadEnvFromFile(envFile string) error {
|
|||
return nil
|
||||
}
|
||||
|
||||
// parseEnvFile parses an env file from KEY=VALUE format.
|
||||
// It's pretty naive. Limited value quotation is supported,
|
||||
// but variable and command expansions are not supported.
|
||||
func parseEnvFile(envInput io.Reader) (map[string]string, error) {
|
||||
envMap := make(map[string]string)
|
||||
|
||||
scanner := bufio.NewScanner(envInput)
|
||||
var line string
|
||||
lineNumber := 0
|
||||
var lineNumber int
|
||||
|
||||
for scanner.Scan() {
|
||||
line = strings.TrimSpace(scanner.Text())
|
||||
line := strings.TrimSpace(scanner.Text())
|
||||
lineNumber++
|
||||
|
||||
// skip lines starting with comment
|
||||
if strings.HasPrefix(line, "#") {
|
||||
continue
|
||||
}
|
||||
|
||||
// skip empty line
|
||||
if len(line) == 0 {
|
||||
// skip empty lines and lines starting with comment
|
||||
if line == "" || strings.HasPrefix(line, "#") {
|
||||
continue
|
||||
}
|
||||
|
||||
// split line into key and value
|
||||
fields := strings.SplitN(line, "=", 2)
|
||||
if len(fields) != 2 {
|
||||
return nil, fmt.Errorf("can't parse line %d; line should be in KEY=VALUE format", lineNumber)
|
||||
}
|
||||
key, val := fields[0], fields[1]
|
||||
|
||||
if strings.Contains(fields[0], " ") {
|
||||
return nil, fmt.Errorf("bad key on line %d: contains whitespace", lineNumber)
|
||||
}
|
||||
|
||||
key := fields[0]
|
||||
val := fields[1]
|
||||
// sometimes keys are prefixed by "export " so file can be sourced in bash; ignore it here
|
||||
key = strings.TrimPrefix(key, "export ")
|
||||
|
||||
// validate key and value
|
||||
if key == "" {
|
||||
return nil, fmt.Errorf("missing or empty key on line %d", lineNumber)
|
||||
}
|
||||
if strings.Contains(key, " ") {
|
||||
return nil, fmt.Errorf("invalid key on line %d: contains whitespace: %s", lineNumber, key)
|
||||
}
|
||||
if strings.HasPrefix(val, " ") || strings.HasPrefix(val, "\t") {
|
||||
return nil, fmt.Errorf("invalid value on line %d: whitespace before value: '%s'", lineNumber, val)
|
||||
}
|
||||
|
||||
// remove any trailing comment after value
|
||||
if commentStart := strings.Index(val, "#"); commentStart > 0 {
|
||||
before := val[commentStart-1]
|
||||
if before == '\t' || before == ' ' {
|
||||
val = strings.TrimRight(val[:commentStart], " \t")
|
||||
}
|
||||
}
|
||||
|
||||
// quoted value: support newlines
|
||||
if strings.HasPrefix(val, `"`) {
|
||||
for !(strings.HasSuffix(line, `"`) && !strings.HasSuffix(line, `\"`)) {
|
||||
val = strings.ReplaceAll(val, `\"`, `"`)
|
||||
if !scanner.Scan() {
|
||||
break
|
||||
}
|
||||
lineNumber++
|
||||
line = strings.ReplaceAll(scanner.Text(), `\"`, `"`)
|
||||
val += "\n" + line
|
||||
}
|
||||
val = strings.TrimPrefix(val, `"`)
|
||||
val = strings.TrimSuffix(val, `"`)
|
||||
}
|
||||
|
||||
envMap[key] = val
|
||||
}
|
||||
|
||||
|
|
170
cmd/main_test.go
Normal file
170
cmd/main_test.go
Normal file
|
@ -0,0 +1,170 @@
|
|||
package caddycmd
|
||||
|
||||
import (
|
||||
"reflect"
|
||||
"strings"
|
||||
"testing"
|
||||
)
|
||||
|
||||
func TestParseEnvFile(t *testing.T) {
|
||||
for i, tc := range []struct {
|
||||
input string
|
||||
expect map[string]string
|
||||
shouldErr bool
|
||||
}{
|
||||
{
|
||||
input: `KEY=value`,
|
||||
expect: map[string]string{
|
||||
"KEY": "value",
|
||||
},
|
||||
},
|
||||
{
|
||||
input: `
|
||||
KEY=value
|
||||
OTHER_KEY=Some Value
|
||||
`,
|
||||
expect: map[string]string{
|
||||
"KEY": "value",
|
||||
"OTHER_KEY": "Some Value",
|
||||
},
|
||||
},
|
||||
{
|
||||
input: `
|
||||
KEY=value
|
||||
INVALID KEY=asdf
|
||||
OTHER_KEY=Some Value
|
||||
`,
|
||||
shouldErr: true,
|
||||
},
|
||||
{
|
||||
input: `
|
||||
KEY=value
|
||||
SIMPLE_QUOTED="quoted value"
|
||||
OTHER_KEY=Some Value
|
||||
`,
|
||||
expect: map[string]string{
|
||||
"KEY": "value",
|
||||
"SIMPLE_QUOTED": "quoted value",
|
||||
"OTHER_KEY": "Some Value",
|
||||
},
|
||||
},
|
||||
{
|
||||
input: `
|
||||
KEY=value
|
||||
NEWLINES="foo
|
||||
bar"
|
||||
OTHER_KEY=Some Value
|
||||
`,
|
||||
expect: map[string]string{
|
||||
"KEY": "value",
|
||||
"NEWLINES": "foo\n\tbar",
|
||||
"OTHER_KEY": "Some Value",
|
||||
},
|
||||
},
|
||||
{
|
||||
input: `
|
||||
KEY=value
|
||||
ESCAPED="\"escaped quotes\"
|
||||
here"
|
||||
OTHER_KEY=Some Value
|
||||
`,
|
||||
expect: map[string]string{
|
||||
"KEY": "value",
|
||||
"ESCAPED": "\"escaped quotes\"\nhere",
|
||||
"OTHER_KEY": "Some Value",
|
||||
},
|
||||
},
|
||||
{
|
||||
input: `
|
||||
export KEY=value
|
||||
OTHER_KEY=Some Value
|
||||
`,
|
||||
expect: map[string]string{
|
||||
"KEY": "value",
|
||||
"OTHER_KEY": "Some Value",
|
||||
},
|
||||
},
|
||||
{
|
||||
input: `
|
||||
=value
|
||||
OTHER_KEY=Some Value
|
||||
`,
|
||||
shouldErr: true,
|
||||
},
|
||||
{
|
||||
input: `
|
||||
EMPTY=
|
||||
OTHER_KEY=Some Value
|
||||
`,
|
||||
expect: map[string]string{
|
||||
"EMPTY": "",
|
||||
"OTHER_KEY": "Some Value",
|
||||
},
|
||||
},
|
||||
{
|
||||
input: `
|
||||
EMPTY=""
|
||||
OTHER_KEY=Some Value
|
||||
`,
|
||||
expect: map[string]string{
|
||||
"EMPTY": "",
|
||||
"OTHER_KEY": "Some Value",
|
||||
},
|
||||
},
|
||||
{
|
||||
input: `
|
||||
KEY=value
|
||||
#OTHER_KEY=Some Value
|
||||
`,
|
||||
expect: map[string]string{
|
||||
"KEY": "value",
|
||||
},
|
||||
},
|
||||
{
|
||||
input: `
|
||||
KEY=value
|
||||
COMMENT=foo bar # some comment here
|
||||
OTHER_KEY=Some Value
|
||||
`,
|
||||
expect: map[string]string{
|
||||
"KEY": "value",
|
||||
"COMMENT": "foo bar",
|
||||
"OTHER_KEY": "Some Value",
|
||||
},
|
||||
},
|
||||
{
|
||||
input: `
|
||||
KEY=value
|
||||
WHITESPACE= foo
|
||||
OTHER_KEY=Some Value
|
||||
`,
|
||||
shouldErr: true,
|
||||
},
|
||||
{
|
||||
input: `
|
||||
KEY=value
|
||||
WHITESPACE=" foo bar "
|
||||
OTHER_KEY=Some Value
|
||||
`,
|
||||
expect: map[string]string{
|
||||
"KEY": "value",
|
||||
"WHITESPACE": " foo bar ",
|
||||
"OTHER_KEY": "Some Value",
|
||||
},
|
||||
},
|
||||
} {
|
||||
actual, err := parseEnvFile(strings.NewReader(tc.input))
|
||||
if err != nil && !tc.shouldErr {
|
||||
t.Errorf("Test %d: Got error but shouldn't have: %v", i, err)
|
||||
}
|
||||
if err == nil && tc.shouldErr {
|
||||
t.Errorf("Test %d: Did not get error but should have", i)
|
||||
}
|
||||
if tc.shouldErr {
|
||||
continue
|
||||
}
|
||||
if !reflect.DeepEqual(tc.expect, actual) {
|
||||
t.Errorf("Test %d: Expected %v but got %v", i, tc.expect, actual)
|
||||
}
|
||||
}
|
||||
}
|
Loading…
Reference in New Issue
Block a user