feat: Dodane parsowanie pliku pgpass

pgpass jest prsowany i przy uruchomieniu psql podawane jest
wybrane hasło pasujące do połaczenia

.gitignore

@@ -1,3 +1,4 @@
+/.vscode
 /output
 /pgpass
 

mgr/mgr.go

@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"baal.ar76.eu/x/pub/multisql/cfg"
+	"baal.ar76.eu/x/pub/multisql/pass"
 	"baal.ar76.eu/x/pub/multisql/psql"
 )
 
@@ -69,6 +70,15 @@ func (self Manager) Run() error {
 		return err
 	}
 
+	var passdb  *pass.PassDb
+
+	if self.config.PassFile != "" {
+		passdb, err = pass.Load(self.config.PassFile, "TODO")
+		if err != nil {
+			return err
+		}
+	}
+
 	var group sync.WaitGroup
 
 	for _, con := range self.config.Connections {
@@ -84,7 +94,7 @@ func (self Manager) Run() error {
 		go self.Logger(&group, stream, con)
 
 		sql := psql.Create(
-			self.config.PassFile,
+			passdb,
 			dbDir,
 			scripts,
 			con,

pass/pass.go

@@ -0,0 +1,81 @@
+package pass
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+)
+
+type pgpassrow struct {
+	hostname string
+	port     string
+	database string
+	username string
+	password string
+}
+
+type PassDb struct {
+	db []pgpassrow
+	cache map[string]*pgpassrow
+}
+
+func Load(file string, master string) (*PassDb, error) {
+
+	data, err := os.ReadFile(file)
+	if err != nil {
+		return nil, err
+	}
+
+	lines := bytes.Split(data, []byte{'\n'})
+
+	var rows []pgpassrow
+
+	for i, line := range lines {
+		line = bytes.TrimRight(line, "\n\r \t")
+		if len(line) == 0 || line[0] == byte('#') {
+			continue
+		}
+		fields := bytes.Split(line, []byte{':'})
+		if len(fields) != 5 {
+			return nil, fmt.Errorf("błąd w pliku hasłeł %s:%d: niewłaściwa liczba pól", file, i)
+		}
+		rows = append(rows, pgpassrow{
+			hostname: string(fields[0]),
+			port:     string(fields[1]),
+			database: string(fields[2]),
+			username: string(fields[3]),
+			password: string(fields[4]),
+		})
+	}
+
+	return &PassDb{
+		db: rows,
+		cache: make(map[string]*pgpassrow),
+	}, nil
+}
+
+func match(value string, pattern string) bool {
+	return pattern == "*" || pattern == value
+}
+
+func (self *PassDb) FindPassword(host string, port uint, database string, user string) string {
+	myport := fmt.Sprintf("%d", port)
+	key := fmt.Sprintf("%s:%s:%s:%s", host, myport, database, user)
+	cached, ok := self.cache[key]
+	if ok {
+		return cached.password
+	}
+
+	// pierwszy pasujący do wzorca
+	for i := range self.db {
+		if match(host, self.db[i].hostname) &&
+			match(myport, self.db[i].port) &&
+			match(database, self.db[i].database) &&
+			match(user, self.db[i].username) {
+
+				self.cache[key] = &self.db[i]
+				return self.db[i].password
+		}
+	}
+	return ""
+}

psql/psql.go

@@ -10,15 +10,16 @@ import (
 	"runtime"
 
 	"baal.ar76.eu/x/pub/multisql/cfg"
+	"baal.ar76.eu/x/pub/multisql/pass"
 )
 
 type Instance struct {
-	outdir   string
-	scripts  []string
-	passfile string
-	psqlExe  string
-	conn     cfg.Connection
-	verbose  bool
+	outdir  string
+	scripts []string
+	pasdb   *pass.PassDb
+	psqlExe string
+	conn    cfg.Connection
+	verbose bool
 }
 
 type Result struct {
@@ -26,32 +27,22 @@ type Result struct {
 	Err    error
 }
 
-func Create(passfile string, outdir string, scripts []string, conn cfg.Connection, psqlExe string, verbose bool) (instnace Instance) {
+func Create(passdb *pass.PassDb, outdir string, scripts []string, conn cfg.Connection, psqlExe string, verbose bool) (instnace Instance) {
 
 	instnace = Instance{
-		outdir:   outdir,
-		scripts:  scripts,
-		passfile: passfile,
-		conn:     conn,
-		psqlExe:  psqlExe,
-		verbose:  verbose,
+		outdir:  outdir,
+		scripts: scripts,
+		pasdb:   passdb,
+		conn:    conn,
+		psqlExe: psqlExe,
+		verbose: verbose,
 	}
 	return instnace
 }
 
 func (self Instance) Exec(result chan<- Result) {
-	absPassFile := ""
-	if self.passfile != "" {
-		var err error
-		absPassFile, err = filepath.Abs(self.passfile)
-		if err != nil {
-			result <- Result{
-				Script: "*",
-				Err:    fmt.Errorf("problem ze zbudowaniem ściężki do pliku haseł: %w", err),
-			}
-			return
-		}
-	}
+
+
 	connString := fmt.Sprintf("host=%s port=%d dbname=%s user=%s", self.conn.Host, self.conn.Port, self.conn.DbName, self.conn.User)
 
 	for _, scr := range self.scripts {
@@ -65,7 +56,8 @@ func (self Instance) Exec(result chan<- Result) {
 			}
 			continue
 		}
-		err = self.cmdPsql(outdir, connString, scr, absPassFile)
+		password := self.pasdb.FindPassword(self.conn.Host, self.conn.Port, self.conn.DbName, self.conn.User)
+		err = self.cmdPsql(outdir, connString, scr, password)
 		result <- Result{
 			Script: scr,
 			Err:    err,
@@ -74,7 +66,7 @@ func (self Instance) Exec(result chan<- Result) {
 	close(result)
 }
 
-func (self Instance) cmdPsql(outdir string, connString string, script string, passfile string) error {
+func (self Instance) cmdPsql(outdir string, connString string, script string, password string) error {
 	absScript, err := filepath.Abs(script)
 	if err != nil {
 		return fmt.Errorf("problem ze zbudowaniem ściezki do skryptu: %w", err)
@@ -112,13 +104,12 @@ func (self Instance) cmdPsql(outdir string, connString string, script string, pa
 	cmd.Stdout = fhOut
 	cmd.Dir = outdir
 
-	if passfile != "" {
+	if password != "" {
 		env := os.Environ()
-		env = append(env, "PGPASSFILE=" + passfile)
+		env = append(env, "PGPASSWORD="+password)
 		cmd.Env = env
 	}
 
-
 	if self.verbose {
 		log.Printf("Uruchamiam %s", cmd.String())
 	}