🧹 Chiritori

'Chiritori' is a tool for removing time-limited source code. The application can pre-tag source code (e.g. using comments) and remove them when required.

• Install
• Getting Started
• Command Arguments
• How to pre-tag source code
  • Delimiter Settings
• Tags
  • time-limited
  • removal-marker
• Removal Strategy
  • Range
  • Unwrap Block
  • Skip
• Supported Character Code

We also provide actions-chiritori, available on GitHub Actions.

Demo

You can try Chiritori in your browser. https://piyoppi.github.io/chiritori-web/

Install

Homebrew

$ brew install piyoppi/tap/chiritori

Manually

Binaries are available on GitHub Releases.

Getting Started

You can try Chiritori with the source code in the /sample directory of this repository.

Command Arguments

Target source code can be provided to Chiritori via command line arguments or standard input.

$ chiritori --filename=./source-code.js

$ cat ./source-code.js | chiritori

If the --output option is not specified, the processed source code is output to standard output.

# The processed source code is written to filesystem.
$ chiritori --filename=./source-code.js --output=./processed-source-code.js

# The processed source code is output to standard output.
$ chiritori --filename=./source-code.js

More information on Command Line Interface arguments can be found in the chiritori --help command.

$ chiritori --help

A tool for removing time-limited source code

Usage: chiritori [OPTIONS]

Options:
  -f, --filename <FILENAME>
          The filename to read
  -o, --output <OUTPUT>
          The filename to write
      --delimiter-start <DELIMITER_START>
          The delimiter start [default: &lt;!-- &lt;]
      --delimiter-end <DELIMITER_END>
          The delimiter end [default: &gt; --&gt;]
      --time-limited-tag-name <TIME_LIMITED_TAG_NAME>
          The tag name for time-limited content [default: time-limited]
      --time-limited-time-offset <TIME_LIMITED_TIME_OFFSET>
          The time offset for time-limited content [default: +00:00]
      --time-limited-current <TIME_LIMITED_CURRENT>
          The current time for time-limited content [default: ]
      --removal-marker-tag-name <REMOVAL_MARKER_TAG_NAME>
          The tag name for removal-marker [default: removal-marker]
      --removal-marker-target-name <REMOVAL_MARKER_TARGET_NAME>
          Name of removal-marker to be removed [default: vec![]]
      --removal-marker-target-config <REMOVAL_MARKER_TARGET_CONFIG>
          Config file specifying the name of the removal-marker to be removed. The content of the config file is indicated by the name of the removal target, separated by a newline
  -l, --list
          List source code to be removed
      --list-all
          List source code to be removed or pending
  -h, --help
          Print help
  -V, --version
          Print version

How to pre-tag source code

Chiritori detects removable source code by "tag" in the source code. Tag is enclosed by start and end delimiters and consist of a tag name and attributes.

The start and end delimiters can be set to any string.

           <!-- < tag-name attribute1="value"  > -->
           ^^^^^^ ^^^^^^^^ ^^^^^^^^^^^^^^^^^^  ^^^^^
  start-delimiter tag name      attribute      end-delimiter

The source code to be removed is enclosed in start and end tags. The closing tag is the tag name with a slash prefixed.

<!-- <tag-name attribute1="value"> -->
Removal source code
<!-- </tag-name> -->

The "c" attribute is a reserved word for inline comments. You can write any comment to the value of the "c" attribute.

/* < time-limited to="2001-01-03 23:59:59"
 * c="New Year's greetings are displayed until 3 January."
 * > */
<h1>Heppy New Year!</h1>
/* < /time-limited > */

Delimiter Settings

The delimiter for representing an element can be changed via command line arguments. This allows any programming language to be used.

chiritori \
  --delimiter-start="// --" \
  --delimiter-end="-- //" \

Tags

time-limited

Source code enclosed in time-limited tags is removed after the specified time.

Attributes

Name	Detail	Example
to	Expiration Time	2024-01-01 00:00:00

Example

<html>
  <body>
    <h1>Hello World</h1>
    <!-- <time-limited to="2024/02/15 12:00:00"> -->
    <h2>Campaign until 2024/02/15 12:00</h2>
    <!-- </time-limited> -->
    <!-- <time-limited to="9999/12/31 23:59:59"> -->
    <h2>Campaign until 9999/12/31</h2>
    <!-- </time-limited> -->
  </body>
</html>

removal-marker

If the command line argument --removal-marker-target-name is specified, tags whose name attribute matches the value of the argument are targeted for deletion.

chiritori --filename=./samples/sample-code.js --removal-marker-target-name="feature1"

Removal targets can also be specified using a configuration file.

chiritori --filename=./samples/sample-code.js --removal-marker-target-config=./config.txt

The configuration file specifies the target for each new line. If the contents of config.txt are as follows.

feature1
feature2

It is equivalent to the following commands.

chiritori --filename=./samples/sample-code.js --removal-marker-target-name="feature1" --removal-marker-target-name="feature2"

Attributes

Name	Detail	Example
name	Marker Name (any string)	Feature1

Example

<html>
  <body>
    <h1>Hello World</h1>
    <!-- <removal-marker name="Feature1"> -->
    <p>Feature 1 will be released soon.</p>
    <!-- </removal-marker> -->
    <!-- <removal-marker name="Feature2"> -->
    <p>Feature 2 will be released soon.</p>
    <!-- </removal-marker> -->
  </body>
</html>

Removal Strategy

Chiritori has several removal strategies. You can choose a strategy by argument (except for the default strategy).

Range (Default)

The strategy is to remove the source code enclosed in tags.

Original	Removed
(delimiters: <!--, -->) Content A <!-- tag --> Removal content <!-- /tag --> Content B	Content A Content B

Unwrap Block

This strategy can unwrap nested source code.

For example, unwrapping an ‘If block’ ensures that the source code in the block is always executed.

To use this strategy, add a unwrap-block attribute to the tag.

Original	Removed
(delimiters: /* <, > */) /* <tag unwrap-block> */ if (foo === "bar") { console.log("baz"); } /* </tag> */	console.log("baz");

Unwrap Block makes the line immediately after the start tag and the line immediately before the end tag the extent of the block. If the removal target does not exist immediately after the start tag and immediately before the end tag, it is not removed.

/* This source code is removed */

/* <time-limited to="2000-01-01 00:00:00" unwrap-block> */
if (released) {
  console.log("Released!");
}
/* </time-limited> */

/* This source code is NOT removed */

/* <time-limited to="2000-01-01 00:00:00" unwrap-block> */
console.log("Released!");
/* </time-limited> */

/* <time-limited to="2000-01-01 00:00:00" unwrap-block> */ console.log("Released"); /* </time-limited> */

Skip

If the skip attribute is given, no action is taken even if the removal condition is satisfied.

<html>
  <body>
    <h1>Hello World</h1>
    <!-- Removal conditions satisfied, but not removed -->
    <!-- <time-limited to="2000-01-01 00:00:00 skip> -->
    <p>Feature 1 will be released soon.</p>
    <!-- </time-limited> -->
  </body>
</html>

Supported Character Code

Only UTF-8 character encoding is supported. If you want to enter other character codes, you need to convert it.

iconv -f euc-jp -t utf-8 ./sample-code.php | chiritori | iconv -f utf-8 -t euc-jp