Implement bash CTRL-R reverse history

Fork customized liner into own repo bash.
Rename -being and -end options to -after and -before.

README.md

@@ -2,33 +2,15 @@
 hs9001 (history search 9001) is an easy, quite simple bash history enhancement. It simply writes all
 your bash commands into an sqlite database. You can then search this database.
 
-It improves over bash's built-in history mechanism as it'll aggregate the shell history of all open shells,
-timestamp them and also record additional information such as the directory a command was executed in.
-
-## Usage / Examples
-### Search
-
-```
-hs [search terms]
-```
-You can further filter with options like `-cwd`, `-after` and so on...
-For a full list, see `-help`.
-
-```
-hs -cwd . 
-``` 
-Lists all commands ever entered in this directory
-
-```
-hs -after yesterday -cwd . git
-``` 
-Lists all git commands in the current directory which have been entered today.
-
-Also, it (by default) replaces bash's built-in CTRL-R mechanism, so hs9001's database will be used instead
-of bash's limited history files. 
 
 ## Install
 
+### From source
+```
+go build
+#move hs9001 to a PATH location
+```
+
 ### Debian / Ubuntu
 Latest release can be installed using apt
 ```
@@ -46,26 +28,31 @@ apk update
 apk add hs9001
 ```
 
-### From source
-```
-go build
-#move hs9001 to a PATH location
-```
 
-## Setup / Config
+### Setup / Config
 
 Add this to .bashrc
 
 ```
 eval "$(hs9001 bash-enable)"
 ```
-
-This will also create a `hs`alias so you have to type less in everyday usage.
-
 By default, every system user gets his own database. You can override this by setting the environment variable
 for all users that should write to your unified database.
+
 ```
 export HS9001_DB_PATH="/home/db/history.sqlite"
 ```
 
+## Usage
+### Search
+
+```
+hs9001 search [search terms]
+```
+
+It is recommended to create an alias for search to make life easier, e. g.:
+
+```
+alias searchh='hs9001 search'
+```
 

history.go

@@ -2,10 +2,8 @@ package main
 
 import (
 	"database/sql"
-	"hs9001/liner"
 	"io"
 	"log"
-	"path/filepath"
 	"strings"
 )
 
@@ -13,34 +11,13 @@ type history struct {
 	conn *sql.DB
 }
 
-func createSearchOpts(query string, mode int) searchopts {
+func (h *history) GetHistoryByPrefix(prefix string) (ph []string) {
 	opts := searchopts{}
-	o := "DESC"
-	opts.order = &o
-	lim := 100
-	opts.limit = &lim
-	opts.command = &query
-
-	switch mode {
-	case liner.ModeGlobal:
-		break
-	case liner.ModeWorkdir:
-		workdir, err := filepath.Abs(".")
-		if err != nil {
-			panic(err)
-		}
-		opts.workdir = &workdir
-	default:
-		panic("Invalid mode supplied")
-	}
-	return opts
-}
-
-func (h *history) GetHistoryByPrefix(prefix string, mode int) (ph []string) {
-	cmdquery := prefix + "%"
-	opts := createSearchOpts(cmdquery, mode)
+	opts.order = "DESC"
+	cmdqry := prefix + "%"
+	opts.command = &cmdqry
 	results := search(h.conn, opts)
-	for e := results.Back(); e != nil; e = e.Prev() {
+	for e := results.Front(); e != nil; e = e.Next() {
 		entry, ok := e.Value.(*HistoryEntry)
 		if !ok {
 			log.Panic("Failed to retrieve entries")
@@ -49,13 +26,13 @@ func (h *history) GetHistoryByPrefix(prefix string, mode int) (ph []string) {
 	}
 	return
 }
-
-func (h *history) GetHistoryByPattern(pattern string, mode int) (ph []string, pos []int) {
-	cmdquery := "%" + pattern + "%"
-	opts := createSearchOpts(cmdquery, mode)
-
+func (h *history) GetHistoryByPattern(pattern string) (ph []string, pos []int) {
+	opts := searchopts{}
+	opts.order = "DESC"
+	cmdqry := "%" + pattern + "%"
+	opts.command = &cmdqry
 	results := search(h.conn, opts)
-	for e := results.Back(); e != nil; e = e.Prev() {
+	for e := results.Front(); e != nil; e = e.Next() {
 		entry, ok := e.Value.(*HistoryEntry)
 		if !ok {
 			log.Panic("Failed to retrieve entries")

liner/common.go

@@ -37,8 +37,8 @@ type HistoryProvider interface {
 	WriteHistory(w io.Writer) (num int, err error)
 	AppendHistory(item string)
 	ClearHistory()
-	GetHistoryByPrefix(prefix string, mode int) (ph []string)
-	GetHistoryByPattern(pattern string, mode int) (ph []string, pos []int)
+	GetHistoryByPrefix(prefix string) (ph []string)
+	GetHistoryByPattern(pattern string) (ph []string, pos []int)
 	RLock()
 	RUnlock()
 }
@@ -95,11 +95,11 @@ func (s *State) AppendHistory(item string) {
 func (s *State) ClearHistory() {
 	s.historyProvider.ClearHistory()
 }
-func (s *State) getHistoryByPrefix(prefix string, mode int) (ph []string) {
-	return s.historyProvider.GetHistoryByPrefix(prefix, mode)
+func (s *State) getHistoryByPrefix(prefix string) (ph []string) {
+	return s.historyProvider.GetHistoryByPrefix(prefix)
 }
-func (s *State) getHistoryByPattern(pattern string, mode int) (ph []string, pos []int) {
-	return s.historyProvider.GetHistoryByPattern(pattern, mode)
+func (s *State) getHistoryByPattern(pattern string) (ph []string, pos []int) {
+	return s.historyProvider.GetHistoryByPattern(pattern)
 }
 
 // SetHistoryProvider allows you to set a custom provider

liner/line.go

@@ -90,11 +90,6 @@ const (
 	tabReverse
 )
 
-const (
-	ModeGlobal = iota
-	ModeWorkdir
-)
-
 func (s *State) refresh(prompt []rune, buf []rune, pos int) error {
 	if s.columns == 0 {
 		return ErrInternal
@@ -416,26 +411,8 @@ func (s *State) tabComplete(p []rune, line []rune, pos int) ([]rune, int, interf
 
 // reverse intelligent search, implements a bash-like history search.
 func (s *State) reverseISearch(origLine []rune, origPos int) ([]rune, int, interface{}, error) {
-	modeSelect := false
-	currentMode := ModeGlobal
-
-	getPrompt := func(arg string) string {
-		prompt := ""
-		switch currentMode {
-		case ModeWorkdir:
-			prompt = "(reverse:cwd)`%s': "
-		case ModeGlobal:
-			prompt = "(reverse:global)`%s': "
-		default:
-			panic("Invalid mode")
-		}
-		if modeSelect {
-			prompt = "(select mode)`%s': "
-		}
-		return fmt.Sprintf(prompt, arg)
-	}
-
-	err := s.refresh([]rune(getPrompt("")), origLine, origPos)
+	p := "(reverse-i-search)`': "
+	err := s.refresh([]rune(p), origLine, origPos)
 	if err != nil {
 		return origLine, origPos, rune(esc), err
 	}
@@ -449,10 +426,11 @@ func (s *State) reverseISearch(origLine []rune, origPos int) ([]rune, int, inter
 
 	getLine := func() ([]rune, []rune, int) {
 		search := string(line)
-		return []rune(getPrompt(search)), []rune(foundLine), foundPos
+		prompt := "(reverse-i-search)`%s': "
+		return []rune(fmt.Sprintf(prompt, search)), []rune(foundLine), foundPos
 	}
 
-	history, positions := s.getHistoryByPattern(string(line), currentMode)
+	history, positions := s.getHistoryByPattern(string(line))
 	historyPos := len(history) - 1
 
 	for {
@@ -472,8 +450,6 @@ func (s *State) reverseISearch(origLine []rune, origPos int) ([]rune, int, inter
 				} else {
 					s.doBeep()
 				}
-			case ctrlA:
-				modeSelect = true
 			case ctrlS: // Search forward
 				if historyPos < len(history)-1 && historyPos >= 0 {
 					historyPos++
@@ -491,7 +467,7 @@ func (s *State) reverseISearch(origLine []rune, origPos int) ([]rune, int, inter
 					pos -= n
 
 					// For each char deleted, display the last matching line of history
-					history, positions := s.getHistoryByPattern(string(line), currentMode)
+					history, positions := s.getHistoryByPattern(string(line))
 					historyPos = len(history) - 1
 					if len(history) > 0 {
 						foundLine = history[historyPos]
@@ -504,28 +480,17 @@ func (s *State) reverseISearch(origLine []rune, origPos int) ([]rune, int, inter
 			case ctrlG: // Cancel
 				return origLine, origPos, rune(esc), err
 
-			case tab, cr, lf, ctrlB, ctrlD, ctrlE, ctrlF, ctrlK,
+			case tab, cr, lf, ctrlA, ctrlB, ctrlD, ctrlE, ctrlF, ctrlK,
 				ctrlL, ctrlN, ctrlO, ctrlP, ctrlQ, ctrlT, ctrlU, ctrlV, ctrlW, ctrlX, ctrlY, ctrlZ:
 				fallthrough
 			case 0, ctrlC, esc, 28, 29, 30, 31:
 				return []rune(foundLine), foundPos, next, err
 			default:
-				if modeSelect {
-					switch v {
-					case 'g':
-						currentMode = ModeGlobal
-					case 'w':
-						currentMode = ModeWorkdir
-					}
-					modeSelect = false
-					break
-				}
-
 				line = append(line[:pos], append([]rune{v}, line[pos:]...)...)
 				pos++
 
 				// For each keystroke typed, display the last matching line of history
-				history, positions = s.getHistoryByPattern(string(line), currentMode)
+				history, positions = s.getHistoryByPattern(string(line))
 				historyPos = len(history) - 1
 				if len(history) > 0 {
 					foundLine = history[historyPos]
@@ -761,7 +726,7 @@ mainLoop:
 			case ctrlP: // up
 				historyAction = true
 				if historyStale {
-					historyPrefix = s.getHistoryByPrefix(string(line), ModeGlobal)
+					historyPrefix = s.getHistoryByPrefix(string(line))
 					historyPos = len(historyPrefix)
 					historyStale = false
 				}
@@ -779,7 +744,7 @@ mainLoop:
 			case ctrlN: // down
 				historyAction = true
 				if historyStale {
-					historyPrefix = s.getHistoryByPrefix(string(line), ModeGlobal)
+					historyPrefix = s.getHistoryByPrefix(string(line))
 					historyPos = len(historyPrefix)
 					historyStale = false
 				}
@@ -947,7 +912,7 @@ mainLoop:
 			case up:
 				historyAction = true
 				if historyStale {
-					historyPrefix = s.getHistoryByPrefix(string(line), ModeGlobal)
+					historyPrefix = s.getHistoryByPrefix(string(line))
 					historyPos = len(historyPrefix)
 					historyStale = false
 				}
@@ -964,7 +929,7 @@ mainLoop:
 			case down:
 				historyAction = true
 				if historyStale {
-					historyPrefix = s.getHistoryByPrefix(string(line), ModeGlobal)
+					historyPrefix = s.getHistoryByPrefix(string(line))
 					historyPos = len(historyPrefix)
 					historyStale = false
 				}

main.go

@@ -157,8 +157,7 @@ type searchopts struct {
 	after   *time.Time
 	before  *time.Time
 	retval  *int
-	order   *string
-	limit   *int
+	order   string
 }
 
 func search(conn *sql.DB, opts searchopts) list.List {
@@ -189,18 +188,7 @@ func search(conn *sql.DB, opts searchopts) list.List {
 		args = append(args, opts.retval)
 	}
 	sb.WriteString("ORDER BY timestamp ")
-	if opts.order != nil {
-		sb.WriteString(*opts.order)
-		sb.WriteRune(' ')
-	} else {
-		sb.WriteString("ASC ")
-	}
-
-	if opts.limit != nil {
-		sb.WriteString("LIMIT ")
-		sb.WriteString(strconv.Itoa(*opts.limit))
-		sb.WriteRune(' ')
-	}
+	sb.WriteString("ASC ")
 
 	queryStmt := sb.String()
 
@@ -321,7 +309,6 @@ func main() {
 				PROMPT_COMMAND='hs9001 add -ret $? "$(history 1)"'
 				bind -x '"\C-r": " READLINE_LINE=$(hs9001 bash-ctrlr 3>&1 1>&2 2>&3) READLINE_POINT=0"'
 			fi
-			alias hs='hs9001 search'
 		`)
 	case "bash-disable":
 		fmt.Printf("unset PROMPT_COMMAND\n")
@@ -365,8 +352,7 @@ func main() {
 		q := strings.Join(args, " ")
 
 		opts := searchopts{}
-		o := "ASC"
-		opts.order = &o
+		opts.order = "ASC"
 		if q != "" {
 			cmd := "%" + q + "%"
 			opts.command = &cmd
@@ -398,31 +384,13 @@ func main() {
 		results := search(conn, opts)
 
 		previousCmd := ""
-
-		fi, err := os.Stdout.Stat()
-		if err != nil {
-			panic(err)
-		}
-
-		//Don't print colors if output is piped
-		printColors := true
-		if (fi.Mode() & os.ModeCharDevice) == 0 {
-			printColors = false
-		}
-
 		for e := results.Front(); e != nil; e = e.Next() {
 			entry, ok := e.Value.(*HistoryEntry)
 			if !ok {
 				log.Panic("Failed to retrieve entries")
 			}
 			if !distinct || previousCmd != entry.cmd {
-				prefix := ""
-				postfix := ""
-				if printColors && entry.retval != 0 {
-					prefix = "\033[38;5;88m"
-					postfix = "\033[0m"
-				}
-				fmt.Printf("%s%s%s\n", prefix, entry.cmd, postfix)
+				fmt.Printf("%s\n", entry.cmd)
 			}
 			previousCmd = entry.cmd
 		}