Команды SFK


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Раздел 4. Text Processing - Обработка текста
addhead | addtail | count | difflines | filter | head | joinlines | linelen | load | ofilter | perline | printloop | replace | run | runloop | snapto | sort | strings | tail | xed | xex | xreplace |

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Команда: run
sfk run "your command $file [$relfile] [...]" [-yes] [-nohead] [-quiet] [...]

   run a self-defined command on every file- or directory name.
   within your command string, you may specify:

      $file                     - insert full filename, including path.
      $quotfile    or $qfile    - just as $file, but with quotes "" around.
      $relfile     or $qrelfile - insert relative filename, without path.
      $base        or $qbase    - the relative base filename, without extension.
      $ext         or $qext     - filename extension. foo.bar.txt has extension .txt.
      $path        or $qpath    - the path (directory) without filename.
      $relpath     or $qrelpath - sub path relative to start folder.
      $ufile       or $upath    - force unix style slashes "/" on output.
      $qufile      or $qupath   - unix slashes and quotes combined.
      $since       or $qsince   - with option -sincediff: the reference file name.
      $text        or $qtext    - one record of input text, similar to $file.
      $targ        or $qtarg    - with -tomake: target filename.

      always prefer 'q' forms over non-quoted forms: as soon as there is a filename
      containing blanks, e.g. X:\the src files\test one.txt, you will need quotations,
      or you have to manually insert \" or \q escaped quotes (see 3rd example below).
      you may also use $quotrelfile, $quotsince, $quottext for greater clarity.
      if you supply only $path expressions, only directories will be processed.
      on single word chain commands like "+run vi", " $qfile" is added automatically.

   further pattern support:
      -spat       activates slash patterns like \t \q \xnn etc.
      -upat       unix style syntax using # instead of $

   options
      -yes        really execute. default is just to simulate what would be done.
                  you may also type run. (with a dot) as quick confirmation.
      -nohead     does not display the [simulating:] info text.
      -noinfo     unless you use $text, sfk checks the input filenames
                  1. if they contain blanks, but no quotes are given within command.
                  2. if they seem to use the wrong path separator character.
                  in both cases, a reminder is printed. if you know that your command
                  needs no changes, add -noinfo or use $text instead of $file.
      -quiet      does not echo the commands before execution.
      -relnames   strips the root directory names from filenames.
      -i[files]   process a text or filename list from stdin.
      -idirs      process a directory name list from stdin.
                  on stdin, '#' remark lines and empty lines are skipped. note:
                  "sfk.exe = n.

   command string format
      with option -spat, slashpatterns like \t \q \xnn are supported.
      due to syntax limitations of the command shell, it may help
      - to use \q instead of \"   (avoids quote miscounting at shell)
      - to use \x26 instead of &  (if ampersand is behaving unexpected)

   quoted variable expansion
      when using sfk variables which contain filenames, like in
         run "copy #(src) #(dst)"
      then spaces in filenames require enquoting. when using -spat
      and \q it may cause conflicts if the filename itself contains
      known slash patterns, like \t in file 'mydir\thebar.txt'.
      to avoid this you can use (with sfk run only):
         run "copy #(qsrc) #(qdst)"
      which will surround variable contents by double quotes.

   quoted multi line parameters are supported in scripts
      using parm trim. type "sfk script" for details.

   temporary or permanent output files
      if run output is post-processed by command chaining, e.g. run ... +filter,
      sfk creates temporary files to collect the output. by default, these files
      are deleted when run finishes. say "sfk help options" for more on this.
      specify -to targetdir\$file to write command output into a permanent
      target fileset. required directories are created automatically.
      -to accepts the same mask as run itself, e.g. -to "mydir\$path\$base.tmp"
      by default, standard output AND standard error stream are written to file.
      add 2>nul to your command to strip the error stream.

   return code by variable
      sfk variable run.lastrc contains the return code of the external
      program called. if multiple files were processed then it contains
      only the rc of the last file.

   command chaining notes
      sfk run "...$path..." +nextcmd: will pass directories, not filenames.
      sfk run ... -to tmp\$file +nextcmd: will pass output filenames, not input.
      sfk run ... +run: will pass unchanged input filename list.

   see also
      sfk perline  run sfk command(s) per text input line.
      sfk runloop  run commands using a loop counter.

   web reference
      http://stahlworks.com/sfk-run

   examples
      sfk run "attrib -R $qfile" -quiet testfiles\FooBank\BarDriver
         removes readonly attribute on all files within BarDriver
      sfk run "" -dir . -file .jpg -nohead >index.html
         create html-style image list of all jpegs (using just simulation).
         note that option -nohead removes the [simulating:] info text lines.
      type dirlist.txt | sfk run -idirs "xcopy \"x:\$path\" \"z:\$path\" /I /D"
         update-copy all directories from dirlist.txt from x: to z:
      sfk run "diff oldsrc\$file newsrc\$file" -relnames -sincediff oldsrc newsrc
         compare directories, run "diff" on all files with different content.
      sfk run "diff $qsince $qfile" -sincediff oldsrc newsrc
         same as above, only shorter and safer (including quotes around filenames).
      sfk run "zip update.zip $qfile" -since 20070131 . .java .jsp
         collect .java and .jsp files added/changed since 31-Jan-2007 into a zip file.
      sfk list testfiles .txt +run vi
         open all .txt files in vi. $qfile is added automatically.
      sfk sel . .avi +run "ffmpeg -i $file -f image -t .02 thumbs\$base-%d.jpg"
         extract first image from all .avi movies, videos using ffmpeg.
      sfk sel -since 30m . .cpp .hpp +run -printcmd "rm $path/$base.o"
         delete all object files of source codes changed in the last 30 minutes
      sfk echo -lines 100 101 102 +run "showstatus.bat $text"
         run showstatus.bat three times with the given numbers, e.g. local ip's.
      sfk sel soundlib .wav -tomake "outdir\$base.mp3"
       +run "ffmpeg -i $qfile $qtarg"
         for all .wav files within soundlib that have no, or an older, .mp3 file
         within outdir, run command ffmpeg to convert from .wav to .mp3.
      sfk -exectime run. "copy in.dat out.dat"
         measure the time it takes to run a copy command.
      sfk -var run "myprog.exe" -yes +tell "myprog rc: #(run.lastrc)"
         run external program myprog.exe and tell it's return code.

   Don't try to execute a full run statement in ONE GO. Almost certainly, something
   will go wrong (wrong files selected, syntax error in the command itself), and you
   end up with many wrong output files. Instead, use THREE STEPS:
   
   1. find the correct file set, by some trial and error:
         sfk run "echo $quotfile" mydir
      This will simply show all filenames from "mydir". no command is executed
      on those files, so nothing bad is happening. almost certainly, you notice
      that too many files are included. Maybe you have to add "-nosub" to exclude
      subfolders, or add more details about your file selection, like:
         sfk run "echo $quotfile" mydir .jpg .jpeg
      which reduces the file set to just .jpg and .jpeg files within "mydir".
   
   2. Replace "echo" by the actual command, still running in simulation mode.
         sfk run "copy $quotfile \"d:\pic\small_$base.jpg\"" mydir .jpg .jpeg
      This simulates a copy of all images from mydir to d:\pic, prefixing their name
      by "small_", and ensuring that all target file extensions are only ".jpg".
   
   3. When you're satisfied with the simulation output, add "-yes".


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