Robocopy: How to copy assets from multiple locations to a single location and maintain a log

Question

I have multiple folders containing assets (each folder has subfolders containing these assets .mp3, .txt, .png, etc). I want to copy all this assets along with the subfolder to a single location/folder. I was able to successfully run a robocopy command to achieve copying of assets along with subfolders from one folder to another folder:

robocopy source target /s

I will be running a scheduler once daily to copy the assets. Also I wanted to store the name of all the copied assets in a log file. The name of the log file should be in the form of

log_currentDate.txt

for example if the today's date is 20th Oct 2015... the name of the log file should be:

log_20151020.txt

The next day i.e. 21st Oct 2015, it should be:

log_20151021.txt

This log file should contain the name of all the copied assets on 20th Oct 2015, 21st Oct 2015 and so on. I created a batch command (thanks to @DavidPostill) to create a log as follows:

@echo off
for /f "tokens=1-3 delims=/ " %%a in ('date /t') do (
set _date=%%a%%b%%c
)
echo robocopy source target /log:D:\ABC\log%_date%.txt

This creates a log with the name "logTue2010.txt" (i.e. logdayddmm format). Problem:

1. Where does this log file gets stored? To make visible this log file, I have to write a separate command everyday as follows:

robocopy source target /log:D:\ABC\logWed1021.txt /tee /s

2. How do I ensure that a separate copy of log is obtained each day?
3. Also with the current command, the log file contains the entire output displayed on the cmd window. I just want it to contain the name of the asset with its extension.

EDIT: As per @JosefZ I edited my batch file as follows:

@echo off
for /f "tokens=2 delims==" %%G in ('wmic OS get LocalDateTime /value') do set "_date=%%G"
set "_date="%_date:~0,8%
echo robocopy source target /log:D:\ABC\log\log_%_date%.txt
robocopy source target /log:D:\ABC\log\log_%_date%.txt /S

I received the following output:

D:\ABC>D:\ABC\copy1.bat
robocopy source target /log:D:\ABC\log\log_.txt
Log File : D:\ABC\log\log_.txt

Answer 1

Get YYYYMMDD-formatted date independently of locale and regional settings using for /F loop against wmic (Windows Management Instrumentation Command) and environment variable substring:

@echo off
for /f "tokens=2 delims==" %%G in ('wmic OS get LocalDateTime /value') do set "_date=%%G"
set "_date=%_date:~0,8%"

There are more robocopy logging options:

            /L : List only - don’t copy, timestamp or delete any files.
           /NP : No Progress - don’t display % copied.
      /unicode : Display the status output as Unicode text.   #
     /LOG:file : Output status to LOG file (overwrite existing log).
  /UNILOG:file : Output status to Unicode Log file (overwrite)
    /LOG+:file : Output status to LOG file (append to existing log).
 /UNILOG+:file : Output status to Unicode Log file (append)
           /TS : Include Source file Time Stamps in the output.
           /FP : Include Full Pathname of files in the output.
           /NS : No Size - don’t log file sizes.
           /NC : No Class - don’t log file classes.
          /NFL : No File List - don’t log file names.
          /NDL : No Directory List - don’t log directory names.
          /TEE : Output to console window, as well as the log file.
          /NJH : No Job Header.
          /NJS : No Job Summary.

robocopy B Bcopy /log:D:\ABC\log\log_%_date%.txt /S /NP /NDL /NJH /NJS /NS /NC 

Above command (note /NP /NDL /NJH /NJS /NS /NC switches) will suppress almost all except (full-qualified) file names in robocopy output. However, file names are indented with some Tab and Space characters. Next code snippet should make output as desired:

>D:\ABC\log\log_%_date%.txt (
for /f "tokens=*" %%G in ('
    robocopy B Bcopy /S /NP /NDL /NJH /NJS /NS /NC
  ') do echo(%%G
)

For > explanation, see redirection. And the log file gets stored in specified folder (D:\ABC\log\); to ensure this, try

type D:\ABC\log\log_%_date%.txt