Enhance the cd command in cmd

Add some new features to the cd command:
* `cd`: go to %HOME% or %USERPROFILE%
* `cd -`: go to previous directory
* `h`: show 10 lines of history
* `cd [0-9]`: go to the history lines passed in parameter
* `p`: pop the last line in the history, and go there (sort of undo cd)

Also, no need to pass the `/d` parameter anymore, cd will change the
drive automatically.

Readme.md

@@ -67,6 +67,18 @@ To start SSH agent simply call `agent`, which is in the `bin` folder.
 
 If you want to run SSH agent on startup, uncomment the line in `/vendor/init.bat`so it says `@call "%CMDER_ROOT%/bin/agent.cmd"`.
 
+### cd new feature
+
+The `cd` command has some new usefull features:
+* `cd`: go to `%HOME%` or `%USERPROFILE%`
+* `cd -`: go to previous directory
+* `h`: show 10 lines of history
+* `cd [0-9]`: go to the history lines passed in parameter (only if the directory does not exist)
+* `p`: pop the last line in the history, and go there (sort of undo cd)
+
+Also, no need to pass the `/d` parameter anymore, `cd` will change the
+drive automatically.
+
 ## Todo
 
 1. Complete PowerShell compatibility.

bin/cdplus.bat

@@ -0,0 +1,199 @@
+@echo off
+
+set _cdplus_old_path=%CD%
+
+:: sanity check - remove /d parameter
+if "%~1" == "/d" shift
+
+if "%~1" == "" goto :p_home
+if "%~1" == "-" goto :p_previous
+if "%~1" == "/h" goto :p_history
+if "%~1" == "/p" goto :p_popHistory
+if "%~1" == "/clean" goto :p_clean
+if "%~1" == "/?" goto :p_help
+echo %1| findstr /r "^[0-9]$">nul 2>&1
+if %errorLevel% == 0 (
+    if not exist "%CD%\%~1" goto :p_number
+)
+
+:: normal case
+chdir /d "%~1"
+goto :p_storePath
+
+:: "cd" => go to %HOME%
+:p_home
+if defined HOME (
+    chdir /d %HOME%
+) else (
+    chdir /d %USERPROFILE%
+)
+goto :p_storePath
+
+:: "cd -" => go to previous path if exist
+:p_previous
+call :goToPreviousPath
+goto :p_storePath
+
+:: "cd /h" => show the last history lines
+:p_history
+if "%~2" == "" (
+    call :showHistory 10
+) else (
+    call :showHistory "%~2"
+)
+goto:eof
+
+:: "cd /p" => pop the last history line
+:p_popHistory
+call :popPrevious
+call :showHistory 2
+goto :p_storePrevious
+
+:: "cd /clean" => cleanup txt files
+:p_clean
+call :cleanup
+goto:eof
+
+:: "cd x" (where x=[0-9]) => go to history line x
+:p_number
+call :goToNumber %1
+goto :p_storePath
+
+:: "cd /?" => show help
+:p_help
+call :showHelp
+goto:eof
+
+:: ---------------
+:: Post processing
+:: ---------------
+:p_storePath
+if "%_cdplus_old_path%"=="%CD%" goto:eof
+call :storePath "%_cdplus_old_path%"
+
+:p_storePrevious
+call :setPreviousPath "%_cdplus_old_path%"
+
+:: END
+goto:eof
+
+:: ---------
+:: Functions
+:: ---------
+:showHelp
+echo.Changes the current directory
+echo.
+echo.CD [drive:][path]
+echo.CD [..]
+echo.  Changes the current directory to the one paassed in parameter.
+echo.  .. means the parent directory
+echo.  If no directories are passed then goes to the %%HOME%% or %%USERPROFILE%%.
+echo.  When navigating, the history is kept (50 lines maximum).
+echo.
+echo.CD -
+echo.  Goes to previous directory.
+echo.  The current directory is added to the history.
+echo.
+echo.CD /p
+echo.  Goes to the previous directory.
+echo.  The previous directory is removed from the history (pop), and the current one not saved.
+echo.
+echo.CD [0-9]
+echo.  If a number between 0-9 is passed, and it's not an exist directory, then goes to the corrseponding line in the history.
+echo.
+echo.CD /h [x]
+echo.   Shows the history.
+echo.   By default, shows 10 lines, except if a number is passed in parameter.
+echo.
+echo.CD /clean
+echo.   Removes all the history.
+goto:eof
+
+:cleanup
+    set file=%TEMP%\%ConEmuServerPID%.cdplus.txt
+    set filep=%TEMP%\%ConEmuServerPID%.cdplus-previous.txt
+    if exist "%file%" (
+        ren "%file%"
+        ren "%filep%"
+    )
+goto:eof
+
+:goToNumber
+    set file=%TEMP%\%ConEmuServerPID%.cdplus.txt
+    if exist "%file%" (
+        if %1==0 (
+            call :goToPreviousPath
+        ) else (
+            for /f "skip=%1 delims=" %%x in (%file%) do (
+                chdir /d "%%x"
+                goto:eof
+            )
+        )
+    )
+goto:eof
+
+:popPrevious
+    set file=%TEMP%\%ConEmuServerPID%.cdplus.txt
+    if exist "%file%" (
+        ren "%file%" "%ConEmuServerPID%.cdplus.txt.old"
+        for /f "delims=" %%x in (%file%.old) do (
+            chdir /d "%%x"
+            goto :endPopPrevious
+        )
+        :endPopPrevious
+        for /f "skip=1 delims=" %%x in (%file%.old) do (
+            echo %%x>>"%file%"
+        )
+        del "%file%.old"
+    )
+goto:eof
+
+:showHistory
+    setlocal EnableDelayedExpansion
+    set file=%TEMP%\%ConEmuServerPID%.cdplus.txt
+    if exist "%file%" (
+        set /a count=0
+        for /f "delims=" %%x in (%file%) do (
+            echo !count! - %%x
+            set /a count+=1
+            if !count!==%~1 goto :endShowHistory
+        )
+    )
+    :endShowHistory
+    endlocal
+goto:eof
+
+:storePath
+    set file=%TEMP%\%ConEmuServerPID%.cdplus.txt
+    if exist "%file%" (
+        ren "%file%" "%ConEmuServerPID%.cdplus.txt.old"
+    )
+    echo %~1>"%file%"
+    setlocal EnableDelayedExpansion
+    set /a count=0
+    if exist "%file%.old" (
+        for /f "delims=" %%x in (%file%.old) do (
+            echo %%x>>"%file%"
+            set /a count+=1
+            if !count!==50 goto :endStorePath
+        )
+        :endStorePath
+        del "%file%.old"
+    )
+    endlocal
+goto:eof
+
+:setPreviousPath
+    set file=%TEMP%\%ConEmuServerPID%.cdplus-previous.txt
+    echo %~1>"%file%"
+goto:eof
+
+:goToPreviousPath
+    set file=%TEMP%\%ConEmuServerPID%.cdplus-previous.txt
+    if exist "%file%" (
+        for /f "delims=" %%x in (%file%) do (
+            chdir /d "%%x"
+            goto:eof
+        )
+    )
+goto:eof

config/aliases

@@ -1,7 +1,10 @@
 e.=explorer .
 gl=git log --oneline --all --graph --decorate  $*
 ls=ls --color $*
-pwd=cd
+pwd=chdir
 clear=cls
 history=cat %CMDER_ROOT%\config\.history
 unalias=alias /d $1
+cd=cdplus.bat $*
+h=cdplus /h $1
+p=cdplus /p