markdown_exec

MarkdownExec

Interactively select and execute fenced code blocks in markdown files. Build complex scripts by naming and requiring blocks. Log resulting scripts and output. Re-run scripts.

• Code blocks may be named. Named blocks can be required by other blocks.

• The user-selected code block, and all required blocks, are arranged into a script in the order they appear in the markdown file. The script can be presented for approval prior to execution.

• Executed scripts can be saved. Saved scripts can be listed, selected, and executed.

• Output from executed scripts can be saved.

Screenshots

Select a file

Select a block

Approve code

Output

Example blocks

Installation

Install: $ gem install markdown_exec

Usage

Help

::: mde --help

Displays help information.

Basic

::: mde

Process README.md file in the current folder. Displays all the blocks in the file and allows you to select using [up], [down], and [return].

::: mde my.md or mde -f my.md

Select a block to execute from my.md.

::: mde my.md myblock

Execute the block named myblock from my.md.

::: mde . or mde -p .

Select a markdown file in the current folder. Select a block to execute from that file.

Report documents and blocks

::: mde --list-blocks

List all blocks in the all the markdown documents in the current folder.

::: mde --list-docs

List all markdown documents in the current folder.

Configuration

::: mde --list-default-env or mde --list-default-yaml

List default values that can be set in configuration file, environment, and command line.

::: mde -0

Show current configuation values that will be applied to the current run. Does not interrupt processing.

Save scripts

::: mde --save-executed-script 1

Save executed script in saved script folder.

::: mde --list-recent-scripts

List recent saved scripts in saved script folder.

::: mde --select-recent-script

Select and execute a recently saved script in saved script folder.

Save output

::: mde --save-execution-output 1

Save execution output in saved output folder.

Behavior

• If no file and no folder are specified, blocks within ./README.md are presented.
• If a file is specified, its blocks are presented.
• If a folder is specified, its files are presented. When a file is selected, its blocks are presented.

Configuration

Environment Variables

When executed, mde reads the current environment.

• Configuration in current and children shells, e.g. export MDE_SAVE_EXECUTED_SCRIPT=1.
• Configuration for the current command, e.g. MDE_SAVE_EXECUTED_SCRIPT=1 mde.

Configuration Files

• Configuration in all shells, e.g. environment variables set in your user's ~/.bashrc or ~/.bash_profile files.
• Configuration in the optional file .mde.yml in the current folder. .e.g. save_executed_script: true
• Configuration in a YAML file and read while parsing the inputs, e.g. --config my_path/my_file.yml

Program Arguments

• Configuration in command options, e.g. mde --save-executed-script 1

Representing boolean values

Boolean values expressed as strings are interpreted as:

String	Boolean
empty string	False
0	False
1	True
anything else	True

E.g. opt1=1 will set option opt1 to True.

Boolean options configured with environment variables:

• Set to 1 or non-empty value to save executed scripts; empty or 0 to disable saving. e.g. export MDE_SAVE_EXECUTED_SCRIPT=1 e.g. export MDE_SAVE_EXECUTED_SCRIPT=
• Specify variable on command line. e.g. MDE_SAVE_EXECUTED_SCRIPT=1 mde

Tab Completion

Install tab completion

Append a command to load the completion script to your shell configuration file. mde must be executable for the command to be composed correctly.

echo "source $(mde --pwd)/bin/tab_completion.sh" >> ~/.bash_profile

Behavior

Press tab for completions appropriate to the current input. mde <...> <prior word> <current word><TAB>

Completions are calculated based on the current word and the prior word.

• If the current word starts with -, present matching options, eg --version for the current word --v.
• Else, if the current word is empty and the prior word is an option that takes an argument, present the type of the argument, eg .BOOL. for the option --user-must-approve.
• Else, if the current word is the type of argument, from the rule above, present the default value for the option. e.g. 1 for the type .BOOL. for the option --user-must-approve.
• Else, if the current word is non-empty, list matching files and folders.

Example Completions

In the table below, tab is indicated by !

Input	Completions
mde !	local files and folders
mde -!	all options
mde --!	all options
mde --v!	mde --version
mde --user-must-approve !	mde --user-must-approve .BOOL.
mde --user-must-approve .BOOL.!	mde --user-must-approve 1

Example Blocks

When prompted, select either the awake or asleep block.

export TIME=early

export TIME=late

export ACTIVITY=awake

export ACTIVITY=asleep

echo "$TIME -> $ACTIVITY"

Testing

Execute tests for individual libraries.

bundle exec rake minitest

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the MarkdownExec project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.