updates/bugfixes for statediff

main-mshell.go

@@ -536,12 +536,15 @@ func main() {
 			os.Exit(1)
 		}
 	} else if firstArg == "--single" {
+		base.InitDebugLog("single")
 		handleSingle(false)
 		return
 	} else if firstArg == "--single-from-server" {
+		base.InitDebugLog("single")
 		handleSingle(true)
 		return
 	} else if firstArg == "--server" {
+		base.InitDebugLog("server")
 		rtnCode, err := server.RunServer()
 		if err != nil {
 			fmt.Fprintf(os.Stderr, "[error] %v\n", err)

pkg/base/base.go

@@ -11,6 +11,7 @@ import (
 	"fmt"
 	"io"
 	"io/fs"
+	"log"
 	"os"
 	"os/exec"
 	"path"
@@ -33,9 +34,13 @@ const SessionsDirBaseName = "sessions"
 const MShellVersion = "v0.2.0"
 const RemoteIdFile = "remoteid"
 const DefaultMShellInstallBinDir = "/opt/mshell/bin"
+const LogFileName = "mshell.log"
+const ForceDebugLog = false
 
 var sessionDirCache = make(map[string]string)
 var baseLock = &sync.Mutex{}
+var DebugLogEnabled = false
+var DebugLogger *log.Logger
 
 type CommandFileNames struct {
 	PtyOutFile    string
@@ -56,6 +61,31 @@ func (ckey CommandKey) IsEmpty() bool {
 	return string(ckey) == ""
 }
 
+func Logf(fmtStr string, args ...interface{}) {
+	if (!DebugLogEnabled && !ForceDebugLog) || DebugLogger == nil {
+		return
+	}
+	DebugLogger.Printf(fmtStr, args...)
+}
+
+func InitDebugLog(prefix string) {
+	homeDir := GetMShellHomeDir()
+	err := os.MkdirAll(homeDir, 0777)
+	if err != nil {
+		return
+	}
+	logFile := path.Join(homeDir, LogFileName)
+	fd, err := os.OpenFile(logFile, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0600)
+	if err != nil {
+		return
+	}
+	DebugLogger = log.New(fd, prefix+" ", log.LstdFlags)
+}
+
+func SetEnableDebugLog(enable bool) {
+	DebugLogEnabled = enable
+}
+
 func (ckey CommandKey) GetSessionId() string {
 	slashIdx := strings.Index(string(ckey), "/")
 	if slashIdx == -1 {

pkg/packet/shellstate.go

@@ -154,19 +154,39 @@ func (sdiff *ShellStateDiff) GetHashVal(force bool) string {
 	return sdiff.HashVal
 }
 
-func (sdiff ShellStateDiff) Dump() {
+func (sdiff ShellStateDiff) Dump(vars bool, aliases bool, funcs bool) {
 	fmt.Printf("ShellStateDiff:\n")
 	fmt.Printf("  version: %s\n", sdiff.Version)
 	fmt.Printf("  base: %s\n", sdiff.BaseHash)
-	var mdiff statediff.MapDiffType
-	err := mdiff.Decode(sdiff.VarsDiff)
-	if err != nil {
-		fmt.Printf("  vars: error[%s]\n", err.Error())
-	} else {
-		mdiff.Dump()
-	}
-	fmt.Printf("  aliases: %d, funcs: %d\n", len(sdiff.AliasesDiff), len(sdiff.FuncsDiff))
+	fmt.Printf("  vars: %d, aliases: %d, funcs: %d\n", len(sdiff.VarsDiff), len(sdiff.AliasesDiff), len(sdiff.FuncsDiff))
 	if sdiff.Error != "" {
 		fmt.Printf("  error: %s\n", sdiff.Error)
 	}
+	if vars {
+		var mdiff statediff.MapDiffType
+		err := mdiff.Decode(sdiff.VarsDiff)
+		if err != nil {
+			fmt.Printf("  vars: error[%s]\n", err.Error())
+		} else {
+			mdiff.Dump()
+		}
+	}
+	if aliases && len(sdiff.AliasesDiff) > 0 {
+		var ldiff statediff.LineDiffType
+		err := ldiff.Decode(sdiff.AliasesDiff)
+		if err != nil {
+			fmt.Printf("  aliases: error[%s]\n", err.Error())
+		} else {
+			ldiff.Dump()
+		}
+	}
+	if funcs && len(sdiff.FuncsDiff) > 0 {
+		var ldiff statediff.LineDiffType
+		err := ldiff.Decode(sdiff.FuncsDiff)
+		if err != nil {
+			fmt.Printf("  funcs: error[%s]\n", err.Error())
+		} else {
+			ldiff.Dump()
+		}
+	}
 }

pkg/shexec/parser.go

@@ -9,7 +9,9 @@ import (
 	"strings"
 
 	"github.com/alessio/shellescape"
+	"github.com/scripthaus-dev/mshell/pkg/base"
 	"github.com/scripthaus-dev/mshell/pkg/packet"
+	"github.com/scripthaus-dev/mshell/pkg/simpleexpand"
 	"github.com/scripthaus-dev/mshell/pkg/statediff"
 	"mvdan.cc/sh/v3/expand"
 	"mvdan.cc/sh/v3/syntax"
@@ -157,10 +159,6 @@ func (d *DeclareDeclType) Serialize() string {
 	return fmt.Sprintf("%s|%s=%s\x00", d.Args, d.Name, d.Value)
 }
 
-func (d *DeclareDeclType) EnvString() string {
-	return d.Name + "=" + d.Value
-}
-
 func (d *DeclareDeclType) DeclareStmt() string {
 	var argsStr string
 	if d.Args == "" {
@@ -274,11 +272,12 @@ func EnvMapFromState(state *packet.ShellState) map[string]string {
 		return nil
 	}
 	rtn := make(map[string]string)
+	ectx := simpleexpand.SimpleExpandContext{}
 	vars := bytes.Split(state.ShellVars, []byte{0})
 	for _, varLine := range vars {
 		decl := ParseDeclLine(string(varLine))
 		if decl != nil && decl.IsExport() {
-			rtn[decl.Name] = decl.Value
+			rtn[decl.Name], _ = simpleexpand.SimpleExpandPartialWord(ectx, decl.Value, false)
 		}
 	}
 	return rtn
@@ -289,11 +288,12 @@ func ShellVarMapFromState(state *packet.ShellState) map[string]string {
 		return nil
 	}
 	rtn := make(map[string]string)
+	ectx := simpleexpand.SimpleExpandContext{}
 	vars := bytes.Split(state.ShellVars, []byte{0})
 	for _, varLine := range vars {
 		decl := ParseDeclLine(string(varLine))
 		if decl != nil {
-			rtn[decl.Name] = decl.Value
+			rtn[decl.Name], _ = simpleexpand.SimpleExpandPartialWord(ectx, decl.Value, false)
 		}
 	}
 	return rtn
@@ -438,6 +438,7 @@ func ParseShellStateOutput(outputBytes []byte) (*packet.ShellState, error) {
 	if strings.Index(rtn.Version, "bash") == -1 {
 		return nil, fmt.Errorf("invalid shell state output, only bash is supported")
 	}
+	rtn.Version = rtn.Version
 	cwdStr := string(fields[1])
 	if strings.HasSuffix(cwdStr, "\r\n") {
 		cwdStr = cwdStr[0 : len(cwdStr)-2]
@@ -451,9 +452,35 @@ func ParseShellStateOutput(outputBytes []byte) (*packet.ShellState, error) {
 	}
 	rtn.Aliases = strings.ReplaceAll(string(fields[3]), "\r\n", "\n")
 	rtn.Funcs = strings.ReplaceAll(string(fields[4]), "\r\n", "\n")
+	rtn.Funcs = removeFunc(rtn.Funcs, "_scripthaus_exittrap")
+	lines := strings.Split(rtn.Funcs, "\n")
+	for _, line := range lines {
+		base.Logf("func-line: [%s]\n", line)
+	}
 	return rtn, nil
 }
 
+func removeFunc(funcs string, toRemove string) string {
+	lines := strings.Split(funcs, "\n")
+	var newLines []string
+	removeLine := fmt.Sprintf("%s ()", toRemove)
+	doingRemove := false
+	for _, line := range lines {
+		if line == removeLine {
+			doingRemove = true
+			continue
+		}
+		if doingRemove {
+			if line == "}" {
+				doingRemove = false
+			}
+			continue
+		}
+		newLines = append(newLines, line)
+	}
+	return strings.Join(newLines, "\n")
+}
+
 func (d *DeclareDeclType) normalize() error {
 	if d.DataType() == DeclTypeAssocArray {
 		return d.normalizeAssocArrayDecl()
@@ -565,9 +592,7 @@ func MakeShellStateDiff(oldState packet.ShellState, oldStateHash string, newStat
 	if oldState.Cwd != newState.Cwd {
 		rtn.Cwd = newState.Cwd
 	}
-	if oldState.Error != newState.Error {
-		rtn.Error = newState.Error
-	}
+	rtn.Error = newState.Error
 	oldVars := shellStateVarsToMap(oldState.ShellVars)
 	newVars := shellStateVarsToMap(newState.ShellVars)
 	rtn.VarsDiff = statediff.MakeMapDiff(oldVars, newVars)
@@ -580,7 +605,10 @@ func ApplyShellStateDiff(oldState packet.ShellState, diff packet.ShellStateDiff)
 	var rtnState packet.ShellState
 	var err error
 	rtnState.Version = oldState.Version
-	rtnState.Cwd = diff.Cwd
+	rtnState.Cwd = oldState.Cwd
+	if diff.Cwd != "" {
+		rtnState.Cwd = diff.Cwd
+	}
 	rtnState.Error = diff.Error
 	oldVars := shellStateVarsToMap(oldState.ShellVars)
 	newVars, err := statediff.ApplyMapDiff(oldVars, diff.VarsDiff)

pkg/simpleexpand/simpleexpand.go

@@ -93,12 +93,18 @@ func expandLiteralPlus(buf *bytes.Buffer, info *SimpleExpandInfo, litVal string,
 
 func expandSQANSILiteral(buf *bytes.Buffer, litVal string) {
 	// no info specials
+	if strings.HasSuffix(litVal, "'") {
+		litVal = litVal[0 : len(litVal)-1]
+	}
 	str, _, _ := expand.Format(nil, litVal, nil)
 	buf.WriteString(str)
 }
 
 func expandSQLiteral(buf *bytes.Buffer, litVal string) {
 	// no info specials
+	if strings.HasSuffix(litVal, "'") {
+		litVal = litVal[0 : len(litVal)-1]
+	}
 	buf.WriteString(litVal)
 }
 
@@ -125,6 +131,9 @@ func expandDQLiteral(buf *bytes.Buffer, info *SimpleExpandInfo, litVal string) {
 			lastDollar = false
 			continue
 		}
+		if ch == '"' {
+			break
+		}
 
 		// similar to expandLiteral, but no globbing
 		if ch == '`' {

pkg/statediff/mapdiff.go

@@ -18,10 +18,10 @@ type MapDiffType struct {
 func (diff MapDiffType) Dump() {
 	fmt.Printf("VAR-DIFF\n")
 	for name, val := range diff.ToAdd {
-		fmt.Printf("  add: %s=%s\n", name, val)
+		fmt.Printf("  add[%s] %s\n", name, val)
 	}
 	for _, name := range diff.ToRemove {
-		fmt.Printf("  rem: %s\n", name)
+		fmt.Printf("  rem[%s]\n", name)
 	}
 }