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// Package config handles loading and storing geheim configuration.
// Defaults mirror the Ruby reference (geheim.rb Config::DEFAULTS).
// A JSON file at ~/.config/geheim.json overrides individual fields;
// missing fields keep their default values because Go's json.Unmarshal
// only touches fields that are present in the JSON document.
package config
import (
"encoding/json"
"fmt"
"os"
"path/filepath"
"strings"
)
// configPath is the location of the optional user config file.
const configPath = "~/.config/foostore.json"
// Config holds all application-wide configuration values.
// JSON field names use snake_case to match geheim.rb Config::DEFAULTS keys.
type Config struct {
DataDir string `json:"data_dir"`
ExportDir string `json:"export_dir"`
KeyFile string `json:"key_file"`
KeyLength int `json:"key_length"`
EncAlg string `json:"enc_alg"`
AddToIV string `json:"add_to_iv"`
EditCmd string `json:"edit_cmd"`
GnomeClipboardCmd string `json:"gnome_clipboard_cmd"`
MacOSClipboardCmd string `json:"macos_clipboard_cmd"`
SyncRepos []string `json:"sync_repos"`
}
// defaultConfig returns a Config populated with the same defaults as the
// Ruby reference implementation's Config::DEFAULTS. It calls
// os.UserHomeDir() so that path fields expand correctly at runtime.
func defaultConfig() Config {
home, _ := os.UserHomeDir()
return Config{
DataDir: filepath.Join(home, "git", "geheimlager"),
ExportDir: filepath.Join(home, ".geheimlagerexport"),
KeyFile: filepath.Join(home, ".geheimlager.key"),
KeyLength: 32,
EncAlg: "AES-256-CBC",
AddToIV: "Hello world",
EditCmd: "hx",
GnomeClipboardCmd: "gpaste-client",
MacOSClipboardCmd: "pbcopy",
SyncRepos: []string{"git1", "git2"},
}
}
// expandTilde replaces a leading "~" in path with the user's home directory.
// Non-tilde paths and empty strings are returned unchanged.
func expandTilde(path string) string {
if path == "" || !strings.HasPrefix(path, "~") {
return path
}
home, _ := os.UserHomeDir()
// Replace only the leading "~"; preserve any subdirectory suffix.
return home + path[1:]
}
// expandPathFields tilde-expands every path-typed field in cfg in place.
func expandPathFields(cfg *Config) {
cfg.DataDir = expandTilde(cfg.DataDir)
cfg.ExportDir = expandTilde(cfg.ExportDir)
cfg.KeyFile = expandTilde(cfg.KeyFile)
}
// Load reads ~/.config/geheim.json and merges it over the built-in defaults.
// Any field present in the JSON file overrides the corresponding default;
// fields absent from the file keep their default values.
// If the file is missing or contains invalid JSON a warning is printed to
// stderr and the pure defaults are returned.
// Note: the Ruby reference uses puts (stdout) for this warning; we use stderr
// intentionally because warnings belong on the error stream.
func Load() Config {
cfg := defaultConfig()
path := expandTilde(configPath)
data, err := os.ReadFile(path)
if err != nil {
// File missing or unreadable — use defaults silently only when the
// error is "not found"; otherwise warn the caller.
if !os.IsNotExist(err) {
fmt.Fprintf(os.Stderr, "Unable to read %s, using defaults! %v\n", path, err)
}
return cfg
}
// Unmarshal into the defaults struct so that only fields present in the
// JSON document are overwritten; all others retain their default values.
if err := json.Unmarshal(data, &cfg); err != nil {
fmt.Fprintf(os.Stderr, "Unable to read %s, using defaults! %v\n", path, err)
return defaultConfig()
}
// Tilde-expand path fields that may have been supplied as "~/…" strings
// in the JSON file (defaultConfig() already returns absolute paths, but
// user-supplied values might use "~").
expandPathFields(&cfg)
return cfg
}
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