NAME ---- **tren** - Advanced File Renaming SYNOPSIS -------- :: tren.py [-1abCcdEefghqtvXx] [-I file] [-l string] [-r old=new]... file|dir file|dir ... OPTIONS ------- You may specify *tren* options in one of three ways: 1) On the command line 2) In an "include" file specified with ``-I filename`` on the command line 3) Via the ``$TREN`` environment variable Note that options specified on the command line are evaluated from left to right and supercede any options specified in the environment variable. Think of any options set in ``$TREN`` as the "leftmost command line options". -1 Rename only the first instance of the specified string (*Default*: This is the program default) This option is provided so you can toggle the program back to its default behavior after a previous ``-g`` on the command line. This option is ignored during regular expression processing (``-x``). -a Rename within the entire file or directory name (*Default*: This is the program default) This option is provided so you can toggle the program back to its default behavior after a previous ``-b`` or ``-e`` on the command line. -b Only perform renaming within "name" portion of file or directory name. (*Default*: Rename within the entire file or directory name) Many applications use the suffix of a filename to indicate the contents or type of file. By default, **tren** does renaming in the entire filename *including* the extension. For example doing this:: tren.py -g -r e=u peg.jpeg # -g = "rename all" Renames the file to ``pug.jpug`` .. probably not what you want. The ``-b`` option tells **tren** to only perform string renaming in the actual "name portion" of the filename thereby cirumventing problems like this:: tren.py -g -b -r e=u peg.jpeg # Renames file to pug.jpeg -C Do case-sensitive renaming (*Default*: This is the program default) This option is provided so you can toggle the program back to its default behavior after a previous ``-c`` on the command line. This option is ignored during regular expression processing (``-x``). -c Collapse case when doing string substitution. (*Default*: Search for string to replace is case sensitive) When looking for a match on the old string to replace, **tren** will ignore the case of the characters found in the filename. For example:: tren.py -c -r Old:NEW Cold.txt fOlD.txt This renames both files to ``CNEW.txt`` and ``fNEW.txt`` respectively. Notice that the new (replacement) string's case is preserved. This option is ignored during regular expression processing (``-x``). -d Dump debugging information (*Default*: Off) Dumps all manner of information about **tren** internals - of interest only to program developers and maintainers. -E Continue renaming even after an error is encountered (*Default*: Stop processing after any error) -e Only perform renaming within "extension" portion of or directory name. (*Default*: Substitute within the entire file or directory name) This option is the inverse of ``-b``. It instructs **tren** to do the requested renaming *only* in the filename "extension" not on the file name portion. For example:: tren.py -e -r pe=p peg.jpeg # Renames file to peg.jpg -f Force renaming even if target file or directory name already exists. (*Default*: Skip renaming if a file or directory already exists by the same name as the target.) -g Replace all instances (global rename) of the old string with the new. (*Default*: Only the first matching string is replaced.) Ordinarily, **tren** only replaces the single *leftmost* instance of a string in the entire filename (default), the name portion (``-b``) or the extension (``-e``). If you want *all* instances of a particular string replaced, use this option to enable "global" renaming:: tren.py -g -r p:P pop.txp # Renames file to: PoP.txP This option is ignored during regular expression processing (``-x``). -h Print help information. -I file "Include" command line arguments from ``file`` It is possible to perform multiple renaming operations in one step using more than one ``-r`` option on the **tren** command line. However, this can make the command line very long and hard to read. This is especially true if the renaming strings are complex, contain regular expressions or renaming templates, or if you make heavy use of command line toggles. The ``-I`` option allows you to place any command line arguments in a separate *file* in place of- or in addition to the **tren** command line and/or the ``$TREN`` environment variable. This file is read one line at a time and the contents appended to any existing command line. You can even name the files you want renamed in the file, but they must appear as the last lines of that file (because they must appear last on the command line). Whitespace is ignored as is anything from a ``#`` to the end of a line:: # Example replacement string file # Each line appended sequentially # to the command line -r t[ext]+=txt # Appended first -c -g my=Mine -X -r =/L/ -r foo=bar my.file your.file # Appended last .. NOTE:: There is one important difference between an actual command line and keeping the arguments in a file like this. *Filename wildcards are not expanded within the file.* ``*.txt`` will typically be expanded by a command shell to create a list of files ending in ``.txt``. However, the ``*`` metacharacter has no such meaning when used inside an arguments file. -l string File "extension" delimiter string. (*Default*: ".") **tren** has to know what separates the "name" from the "extension" in a filename. By default, it uses the rightmost ``.`` character. You can change it with this option to "divide" the filename into name and extension for renaming purposes, using any string you like. This is particularly helpful with ``-b`` and ``-e`` options:: tren.py -g -b -l .long.txt -r long:short long.long.txt.long.txt.foo This would rename the file to:: short.short.txt.long.txt.foo Notice that **tren** looks for the *rightmost* instance of the separator to split the whole filename into name and extension components. Notice also that when you do this, no renaming of characters *within* the separator takes place. -q Quiet mode, do not show progress. (*Default*: Display progress) Ordinarily, **tren** displays what it is doing as it processes each file. If you prefer to not see this "noisy" output, use the ``-q`` option. Note that this does not suppress warning and error messages. This option is ignored when running in test mode (``-t``). -r <old=new> Replace ``old`` with ``new`` in file or directory names. Use this option to specify which strings you want to replace in each file name. These strings are treated literally unless you also invoke the ``-x`` option in which case ``old`` is treated as a Python style regular expression. Both ``old`` and ``new`` may optionally contain *Renaming Tokens* described later in this document. If you need to use the ``=`` symbol *within* either the old or new string, simply escape it: ``\=`` You can have multiple instances of this option on your **tren** command line:: tren.py -e old:new -e txt:doc old-old.txt This renames the file to:: new-old.doc By default, **tren** only replaces the first (leftmost) instance of the old string with the new. -t Test mode, don't rename, just show what the program *would* do (ignores -q). **tren** is very powerful and capable of doing nasty things to your files (like making a file disappear when another one is renamed over it). For this reason, it is helpful to test your **tren** commands before actually using them. With this option enabled, **tren** will print out diagnostic information about what your command *would* do, *without actually doing it*. -v Print detailed program version information and exit. -X Treat the renaming strings literally (*Default*: This is the program default) This option is provided so you can toggle the program back to its default behavior after a previous ``-x`` on the command line. -x Treat the old string in a ``-r`` replacement as a Python style regular expression for matching purposes. (*Default*: Treat the old string as literal text) DESCRIPTION ----------- .. WARNING:: **tren** is a powerful file and directory renaming tool. Be **sure** you know what you're about to do. If you're not, run the program in test mode (invoke with the ``-t`` option) to see what would happen. You have been warned! **tren** is a general purpose file and directory renaming tool. Unlike commands like ``mv``, **tren** is particularly well suited for renaming *batches* of files and/or directories with a single command line invocation. **tren** eliminates the tedium of having to script simpler tools to provide higher-level renaming capabilities. **tren** will not allow you to rename a file or directory if one with the new name already exists. Such attempts will cause no change to the file or directory being processed and an error message will be displayed. This is intentional to force you to manually rename or remove the file or directory that would have been clobbered by a rename. You can override this default and *force* a renaming and thus the removal of such existing files or directories (``-f`` option). **tren** supports a variety of renaming mechanisms. The one thing they have in common is that you must specify an *old string* which will be replaced by a *new string* when the file or directory is renamed. The general form is:: tren.py -r old=new <list of files, directories to rename> The ``old`` and ``new`` renaming strings are built using a variety of building blocks: ============================= ============================= *Old Strings Are Built With:* *New Strings Are Built With:* ----------------------------- ----------------------------- Literal Text Literal Text Regular Expressions Renaming Tokens Renaming Tokens ============================= ============================= You can use any of these building blocks alone or combine them to create expressive and powerful renaming schemes. Literal String Substitution --------------------------- Literal String Substitution is just that - it replaces one literal string with another to rename the target file or directory. This is the most common, and simplest way to use **tren**. This is handy when you have files and directories that have a common set of characters in them you'd like to change. For instance:: tren.py -r .Jpeg=.jpg *.Jpeg This would rename all files (or directories) whose names contained the string ``.Jpeg`` and replace it with ``.jpg``. Well ... that's not quite right. Unless you specify the ``-g`` option, *only the first (leftmost) instance of ``old`` is replaced with ``new``*. It's important to realize that such a substitution takes place *anywhere* in the file name, not just at the end or "extension" (as it is called in Windows). You can limit the replacement to just the "name" (``-b``) or "extension" (``-e``) portions of the filename. You may specify multiple replacement operations (``-r``) on the **tren** command line:: tren.py -g -r .Jpeg=.jpg -r old=ReallyOld * This would rename all the files in the current directory, replacing ``.Jpeg`` with ``.jpg`` and ``old`` with ``ReallyOld`` anywhere these strings appeared in any of the file or directory names. If you need to include the equals sign as part of the old string or the new string literal text, you have to escape it (``\=``):: tren.py -r name\=bob=name\=sally name=bob.dbms This renames the file ``name=bob.dbms`` to ``name=sally.dbms``. Using Regular Expressions ------------------------- Ordinarily **tren** treats both the old string you specify with the ``-r`` option *literally*. However, it is sometimes handy to be able to write a regular expression to specify what you want replaced. If you specify the ``-x`` option, **tren** will treat your old string as a Python style regex, compile it (or try to anyway!) and use it to select which strings to replace. This makes it much easier to rename files that have repeated characters or patterns, and groups of files that have similar, but not idential strings in their names you'd like to replace. Say you have a set of files that are similar, but not idential in name, and you want to rename them all:: sbbs-1.txt sbbbs-2.txt sbbbbbbbbs-3.txt Suppose you want to rename them, replacing two or more instances of ``b`` with ``X``. It is tedious to have to write a separate literal ``-r old:new`` string substitution for each instance above. This is where regular expressions can come in handy. When you invoke the ``-x`` option, **tren** understands this to mean that the ``old`` portion of the replacement option is to be treated as a *Python style regular expression*. That way, a single string can be used to match many cases:: tren.py -x -r bb+:X *.txt This renames the files to:: sXs-1.txt sXs-2.txt sXs-3.txt Keep in mind that a literal string is a subset of a regular expression. This effectively means that with ``-x`` processing enabled you can include *both* regular expressions and literal text in your "old string" specification. The only requirement is that the string taken as a whole must be a valid Python regular expression. If it is not, **tren** will display an error message to that effect. Because Python regular expressions can make use of the ``=`` symbol, you need a way to distinguish between an ``=`` used in a regular exression and the same symbol used to separate the old and new operands for the ``-r`` option. Where this symbol needs to appear in a regular expression, it has to be escaped like this: ``\=``. Regular expression processing is unaffected by the ``-g / -1`` (global rename) and ``-c / -C`` (ignore case) options. That's because there are regular expression mechanisms for achieving the same thing. More importantly, if you've selected regular expression matching, it's probably because you want very fine grained control of the renaming defined by the regex. In short, regular expression matching always takes place on the *original characters* of the target portion of the name and does replacement as called for in the regex itself. An Overview Of Renaming Tokens ------------------------------ **tren** implements the notion of *Renaming Tokens*. These can appear in either the ``old`` or ``new`` string components of a ``-r`` renaming argument. It is sometimes useful to be able to take a group of files or directories whose names have nothing in common and impose a common naming scheme on them. Another use for renaming tokens is to do the renaming based on some property the file or directory possesses like its creation date, size, owner's name, and so on. In their simplest form, renaming tokens are nothing more than "canned" information **tren** knows about a particular file or directory. For instance, if you insert the ``/D/`` token into a old- or new string definition, **tren** will replace it with *the creation date of the file or directory being renamed* and use that string in the renaming process. There are also tokens that allow you to use system information in your renaming strings. Finally, there are tokens that can be used to automatically renumber or sequence (order) a set of files or directories being renamed. For example, suppose you and your friends pool your vacation photos but each of your cameras uses a slightly different naming scheme. You might want to just reorder them by the date and time each picture was taken, for example. That way you end up with one coherent set of named and numbered files. You might start with something like this:: DSC002.jpg # Bob's camera, taken 1-5-2010 at noon dc0234.Jpg # Mary's camera, taken 1-5-2010 at 8am 032344.jpeg # Sid's camera, taken 1-3-2010 at 4pm It would be nice to get these in order somehow:: tren.py -r =/D/-MyVacation-/+T0001/.jpeg *.jp* This would rename all the files in the current directory ending with ``.jp*``. The ``/D/`` would be replaced with the *date* the picture was taken. The ``/+T0001/`` refers to a *starting sequence number* to uniquely identify pictures taken on the same date. The other strings, ``-MyVacation-`` and ``.jpeg``, are inserted *literally* in the final file names. After we ran this command, the files above would end up with these names:: 20100103-MyVacation-0001.jpeg # Sid's 20100105-MyVacation-0001.jpeg # Mary's 20100105-MyVacation-0002.jpeg # Bob's Notice that the files taken on the same date have been sequenced by the time-of-day they were taken because we included the ``/+T0001/`` renaming token in our pattern. The ``+`` here means to construct the sequence in *ascending* order. A ``-`` would specify *descending* order. .. Note:: Notice that there is *no old string* in our example above. That is, there is nothing to the left of the ``=`` symbol in the ``-r`` option. This effectively means "replace everything" in the existing file or directory name. You can do the same thing using a regular expression:: tren.py -x -r *=/D/-MyVacation-/+T001/.jpeg *.jp* Of course, if you use the ``-b`` or ``-e`` flags, you limit just what portion of the filename is considered "everything". Of course, you don't *have* to replace the entire filename when using tokens. It's perfectly legitimate to replace only a portion of the existing name:: tren.py -r file=/D/-file file-1 file.2 This would rename our files to: ``20100101-file-1 and 20100101-file.2`` Notice that we combined literal text and a renaming token to do this. You can even use renaming tokens in your *old string* specification. For instance, suppose you manage a number of different systems and you set their system name in an environment variable called SYSNAME. You might then do something like this:: tren.py -x -r /$SYSNAME/*.bku=/$SYSNAME/*.bku.old If your system name was "matrix", then the command above would only rename files whose names began with ``matrix`` and ended with ``.bku``. If your system name were "morton", then the command above would only rename files whose names began with ``morton`` and ended with ``.bku``. There are a couple of things to keep in mind when doing things like this: 1) The ``/$SYSNAME/`` in the old string is used to *find the text to rename*, whereas the same renaming token in the new string means *insert the contents of that environment variable here*. 2) Renaming tokens are always evaluated *before* any regular expression processing takes place. It's up to you to make sure that when the two are combined (as we have in the example above), *that the final result is still a valid Python regular expression*. This may involve explicit quoting of the renaming tokens used in the old string specification. **tren** has many other kinds of renaming tokens. Their structure and use is described in some detail in the section below entitled `RENAMING TOKENS: THE GORY DETAILS`_. COMMAND LINE TOGGLES -------------------- **tren** defaults to a specific set of behaviors: - ``old`` and ``new`` renaming text is treated *literally* - Renaming takes place within *the entire filename* - *Only the first instance* of ``old`` is replaced with ``new`` - Renaming is *case sensitive* There are command line "switches" to override each of these defaults (``-x``, ``-b``, ``-e``, ``-g``, and ``-c``). There are additional "switches" to return the program to its default behavior (``-X``, ``-a``, ``-1``, and ``-C``). The idea is that you can specify what kind of replacement behavior you want *for each different renaming operation*. For instance:: tren.py -e -r txt=TXT -g -a -c -r M=0 -C -x -r [ss]+=S filelist This would rename the files as follows: - The first instance of ``txt`` would be replaced with ``TXT`` in each of the file extensions. - All instances of ``m`` or ``M`` would be replaced anywhere they were found in the filename. - All instances of one or more strings in the form ``ss`` would be replaced with ``S``. OTHER PROGRAM SEMANTICS ----------------------- It's important to understand some subtleties of just how **tren** works, particularly if you intend to create complex, multi-replacement command lines: - Command line processing is from left to right. As we saw in the `COMMAND LINE TOGGLES`_ above, this means the options can be different for each renaming operating you specify. - Regular expression processing is unaffected by the ``-g / -1`` (global rename) and ``-c / -C`` (ignore case) options. - Filenames may be absolute, relative, or implict (to the current working directory). **tren** keeps track of this and can do renaming in directories other than the current one. - **tren** processes each renaming string in the following manner: 1) Select the target portion of the filename for renaming (all, name only, extension only). 2) Replace all renaming tokens with their equivalent text in both the ``old`` and ``new`` renaming strings. 3) If doing literal string replacement: - If ``-c`` is in effect, collapse the target and the ``old`` renaming string to *lower case* before checking for a match. - Replace the first- (default and ``-1``) or all (``-g``) instances of ``old`` with ``new``. 4) 4) If doing regular expression processing, replace any regex matches with the corresponding ``new`` string. Keep in mind that if ``-x`` is selected the *entire* ``old`` string is treated as a Python regular expression. Pay particular attention to this if you're combing literal text and/or renaming templates with regular expression metacharacters. - When all the renaming operations are complete - and thus a new filename has been constructed - **tren** checks to see if a file or directory by that name already exists. Unless the ``-f`` flag is in force, **tren** will refuse to do a renaming *over an existing filename*. If the new filename does not exist, **tren** will attempt the renaming. If the rename fails for some reason - say you don't have permission to rename a particular file or directory - you'll see an error message to that effect. - By default, **tren** will stop processing on any error. You can override this with the ``-E`` option. In that case, an error message will be displayed. No matter what caused the error, **tren** will skip the file currently being processed and go on to the next one. RENAMING TOKENS: THE GORY DETAILS --------------------------------- As we've just seen, a *Renaming Token* is nothing more than a string representing something **tren** knows about. These fit in one of three categories: - An attribute of the file or directory being renamed - An attribute of the underling operating system environment - A sequence that reflects some ordering principle Renaming tokens are delimited by the ``/`` character. **tren** replaces these tokens with the corresponding information (see descriptions below) wherever you indicated in either the ``old`` or ``new`` strings of a ``-r`` rename command. Currently, **tren** defines a number of renaming tokens. Future releases of **tren** may add more of these, so it's good to periodically reread this material. File Attribute Renaming Tokens --------------------------------- These tokens are derived from information about the file or directory being renamed. ``/D/ File or directory creation date`` This token is replaced with the date of creation of the file or directory being renamed. It is in ``yyyymmdd`` format. ``/dd/ File or directory day of creation`` This token is replaced with the the day of the month the file was created in ``dd`` format. ``/dy/ File or directory day of creation`` This token is replaced with the the name of the day the file was created in ``Ddd`` format. ``/E/ Original File Extension`` This token is replaced the "extension" portion of the file or directory before renaming. This does not include the extension separator string. ``/F/ Original File Name`` This token is replaced the "name" portion of the file or directory before renaming. .. NOTE:: Notice that there is no token for the *whole* filename because you can always synthesize it with ``/F/./E/`` ``/G/ File or directory primary group name`` This token is replaced with the name of the primary group to which the file belongs. ``/hh/ File or directory hour of creation`` This token is replaced with the hour the file was created in ``hh`` format. ``/I/ File or directory creation date in ISO format`` This token is replaced with the date of creation of the file or directory being renamed. It is similar to ``/D/`` except it is in ISO format, ``YYYY-MM-DD``. ``/L/ File or directory length`` This token is replaced with a numeric string that indicates the length of the file or directory in bytes. ``/mm/ File or directory minutes of creation`` This token is replaced with the minutes the file was created in ``mm`` format. ``/mo/ File or directory month of creation`` This token is replaced with the numeric month the file was created in ``mm`` format. ``/my/ File or directory month of creation`` This token is replaced with the abbreviated name of the month the file was created in ``Mmm`` format. ``/ss/ File or directory seconds of creation`` This token is replaced with the seconds the file was created in ``ss`` format. ``/T/ File or directory creation time`` This token is replaced with the time of creation of the file or directory being renamed. It is in ``hh:mm:ss`` format. This is equivalent to ``/hh/:/mm/:/ss/``. ``/U/ File or directory owner name`` This token is replaced with the name of the file or directory's owner. ``/yyyy/ File or directory year of creation`` This token is replaced with the year the file was created in ``yyyy`` format. System Related Renaming Tokens --------------------------------- These tokens are derived from the underlying operating system and runtime environment. ``/$ENV/ Environment variable`` This token is replaced with the value of the environment variable ``$ENV``. If that variable does not exist, the token is replaced with an empty string:: tren.py -r =/$ORGANZATION/-/F/./E/ * This prepends the organization's name to everything in the current directory. ``/`cmd`/ Arbitrary command execution`` This token is replaced with the string returned by executing the ``cmd`` command. For instance, you might want to prepend the name of the system to a all you shell scripts:: tren.py -r =/`uname -n`/-/F/./E/ *.sh This construct is more generally a way to synthesize renaming tokens that are not built into **tren**. For instance, the built-in tokens only provide information about file and directory *creation* dates. You might want to use the date of *last access*. You do this by writing the appropriate script or program and then executing it within the /\`cmd\`/ construct. This effectively provides **tren** an unlimited number of renaming tokens. .. WARNING:: Be *very* careful using this. It's possible to construct bizzarre, overly long, and just plain chowder-headed strings that make no sense in a renaming context using this construct. Sequence Renaming Tokens --------------------------- Sometimes it's useful to rename files or directories based on some *property they possess* like the date or time of creation, the size of the file, who owns it, and so on. That's the idea behind the ``/D/``, ``/L/``, and ``/T/`` renaming tokens described in the previous section. An extension of this idea is to *order all the files being renamed* based on one of these parameters. For instance, instead of actually embedding the date and time of creation in a file or directory name, you might want to order the files from oldest to newest with a naming convention like:: file-1.txt file-2.txt file-3.txt This guarantees uniqueness in the final name and also sees to it that a sorted directory listing will show you the files or directories in the order you care about. This is the purpose of *sequence renaming tokens*. They give you various ways to create sequences that can be embedded in the final file or directory name. General Format Of Sequence Renaming Tokens ------------------------------------------ Sequence renaming tokens consist of three descriptive components and have the following general format:: /<ordering flag><type><counting pattern>/ where, ordering flag: + ascending - descending type: D sequence on file creation date & time L sequence on file length R sequence on the command line file order T sequence on file creation time within a given day Count Pattern Format -------------------- The counting pattern is used to specify two things: The width of the sequence string, and the starting value for the sequence. Examples:: 0001 -> 0001, 0002, 0003, ... 0000 -> 0000, 0001, 0002, ... 03 -> 03, 04, 05, ... You do not have to use a ``0`` to indicate the sequence width. You can use *any* padding characters you like. **tren** only cares about the width of the field and will "consume" your padding characters as the count increases.:: xxx3 -> xxx3, xxx4, xxx5, ... 9999, xxx3, xxx4, ... -+8 -> -+8, -+9, -10, -11, ... 999, -+8, -+9, ... You are not restricted to numbers in a counting pattern. Letters may also be used. **tren** will preserve the case you specify in the token when creating sequences like this:: 000a -> 000a, 000b, 000c, ... zzzz, 000a, ... ---Y -> ---Y, ---Z, --AA, ... ZZZZ, ---Y, ---Z, ... Notice that when a sequence "rolls over", the next value is the *initial sequence value you specified*. Types Of Sequence Renaming Tokens --------------------------------- Sequence renaming tokens are thus a way to generate an ordering *based on some property common to everything being renamed*. Keep in mind that for purposes of sequencing, **tren** *makes no distinction between a file and directory*. It merely sequences based on the property you requested. **tren** currently supports the following kinds of sequencing: ``/+D0001/ Sequence based on the creation date/time`` This produces a sequence from oldest to newest (or the reverse) of the renamed objects. ``tren.py -b -r =/+D0002/ *.txt`` This would rename all the files in the current directory into the form, ``0002.txt``, ``0003.txt``, ... ``9999.txt`` with ``0002.txt`` being the oldest file and ``9999.txt`` being the newest. If you used the token ``/-D0002/``, you'd get the same thing, but in reverse order. ``/+L0001/ Sequence based on the size of the files being renamed`` This produces a sequence from shortest to longest (or the reverse) of the renamed objects. ``tren.py -r /+L0002/ *.txt`` This would rename all the files in the current directory into the form, ``0002.txt``, ``0003.txt``, ... ``9999.txt`` with ``0002.txt`` being the shortest file and ``9999.txt`` being the longest. If you used the token ``/-L0002/``, you'd get the same thing, but in reverse order. ``/+R0001/ Sequence based on the file order on the command line`` This produces a sequence based on the order (or the reverse) of renaming - i.e., The order of the names on the command line. ``tren.py -e -r =/+R0000/ MyFile.txt AFile.jpg me.log`` This would rename all the files to, ``MyFile.0``, ``AFile.1``, and ``me.2``. If you used ``/-R0000/``, you'd get ``MyFile.2``, ``AFile.1```, and ``me.0``. ``/+T0001/ Sequence based on creation time within date`` This produces a sequence based on the creation date and time similar to the ``/+D.../`` sequence renaming token above. However, the sequence *resets* at the beginning of each new date. This allows you to create unique sequences *within a date* like our example of renaming photo files from different cameras. (See: `An Overview Of Renaming Tokens`_):: tren.py -b -r =/D/-/+T0100/ *.txt This would rename all the ``.txt`` files in the current directory into the form:: 200103010-0100.txt 200103010-0101.txt 200103010-0102.txt 200104010-0100.txt 200104010-0101.txt 200104010-0102.txt 200104011-0100.txt 200104011-0101.txt 200104011-0102.txt ... In other words, instead of sequence just on the creation date, this allows us to sequence *within* the date. As always, the ``-`` flag will reverse this order within the date. Notice that you can get something similar using just file attribute renaming tokens:: tren.py -b -r =/D/-/T/ *.txt This would produce names in the form:: 200103010-03:01:23.txt 200103010-03:01:24.txt 200103010-03:01:25.txt ... For most purposes, though, the order, rather than the absolute time is both more useful and more readable. EXAMPLES -------- Here are some common examples of **tren** in action - the resulting file name(s) shown to the right as a comment. Study each example carefully. Small subtleties are introduced in various adjacent examples to illustrate different features of **tren**: Get help:: tren.py -h Print out detailed version information:: tren.py -v Simple rename:: tren.py -r old=New fold.txt log.old # fNew.txt log.New Change file "name":: tren.py -b -r old=New fold.txt log.old # fNew.txt log.old Change file "extension":: tren.py -e -r old=New fold.txt log.old # fold.txt log.New Rename all instances of a given string:: tren.py -g -r bin=Bin binary_bin.binbin # Binary_Bin.BinBin Rename, ignoring case:: tren.py -c -r bin=BIN Binary_bIN.txt # BINary_bIN.txt Rename multiple strings at once:: tren.py -r log:txt -r New:old New.log # old.txt Rename using regular expressions:: tren.py -x -r a+=a Saaaaaaaally.doc # Sally.doc Rename a file containing the ``=`` symbol:: tren.py -r a\=b=c\=d a=b.txt # c=d.txt Use renaming token:: tren.py -r =/I/ file.1 # 2010-01-12 Use renaming token to change file "name":: tren.py -b -r =/I/ file.1 file.2 # 2010-01-12.1 2010-01-12.2 Use renaming token to change file "extension":: tren.py -e -r =/D/ file.1 # file.20100112 OTHER ----- You must have a reasonably current version of Python installed. BUGS AND MISFEATURES -------------------- On windows platforms, the ``/U/`` and ``/G/`` do not return the underlying operating system ownership information.. They return ``winuser`` and ``wingroup`` respectively. COPYRIGHT AND LICENSING ----------------------- **tren** is Copyright (c) 2010 TundraWare Inc. For terms of use, see the ``tren-license.txt`` file in the program distribution. If you install **tren** on a FreeBSD system using the 'ports' mechanism, you will also find this file in ``/usr/local/share/doc/tren``. AUTHOR ------ :: Tim Daneliuk tren@tundraware.com DOCUMENT REVISION INFORMATION ----------------------------- :: $Id: tren.rst,v 1.134 2010/01/22 17:46:04 tundra Exp $ You can find the latest version of this program at: http://www.tundraware.com/Software/tren