etalon
976f5238f8
- internal .env loader (real env wins) + strictly validated config struct - ULID package: 48-bit ms timestamp + 80-bit crypto randomness, sortable - HTTP server with recovery/request-id/trusted-proxy/access-log middleware - /healthz, /readyz (pluggable checkers), /metricsz (counter registry) - multi-stage Dockerfile (alpine, non-root) + compose with healthchecks, app bound to 127.0.0.1:8787, mongo unpublished, graceful 15s shutdown Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
package config
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import (
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"bufio"
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"fmt"
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"os"
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"strings"
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)
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// LoadDotEnv reads a dotenv file and sets each variable into the process
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// environment unless it is already set (real environment wins). Supported
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// syntax: KEY=VALUE, blank lines, full-line and unquoted inline comments,
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// optional `export ` prefix, single- or double-quoted values.
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func LoadDotEnv(path string) error {
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f, err := os.Open(path)
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if err != nil {
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if os.IsNotExist(err) {
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return nil
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}
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return fmt.Errorf("open %s: %w", path, err)
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}
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defer f.Close()
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sc := bufio.NewScanner(f)
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for n := 1; sc.Scan(); n++ {
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line := strings.TrimSpace(sc.Text())
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if line == "" || strings.HasPrefix(line, "#") {
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continue
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}
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line = strings.TrimPrefix(line, "export ")
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key, val, ok := strings.Cut(line, "=")
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if !ok || strings.TrimSpace(key) == "" {
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return fmt.Errorf("%s:%d: not a KEY=VALUE line", path, n)
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}
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key = strings.TrimSpace(key)
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val = strings.TrimSpace(val)
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switch {
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case len(val) >= 2 && (val[0] == '"' || val[0] == '\'') && val[len(val)-1] == val[0]:
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val = val[1 : len(val)-1]
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default: // unquoted: strip trailing inline comment
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if i := strings.Index(val, " #"); i >= 0 {
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val = strings.TrimSpace(val[:i])
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}
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}
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if _, exists := os.LookupEnv(key); !exists {
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os.Setenv(key, val)
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}
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}
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return sc.Err()
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}
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