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<h1 id="usage">Usage</h1>
<p><code>Task.mk</code> will add access to a recipe <code>help</code> (also aliased to <code>h</code>).
In order to use <code>make help</code> to you will need to add some custom comments to your <code>Makefile</code>.</p>
<p>Deliberately, I don't get names from recipes themselves.
This not only greatly simplifies the parsing but add's some opportunity to customize the output.
Such as to document wildcard or redundant recipes.</p>
<p>You can place these anywhere, but I recommend adding these notes directly above their relevant recipes.
The format is <code>## &lt;recipe&gt; | &lt;msg&gt;</code></p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="c">## build | build the project</span>
<a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a><span class="nf">.PHONY</span><span class="o">:</span> <span class="n">build</span>
<a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a><span class="nf">build</span><span class="o">:</span>
<a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a> ...
</code></pre></div>
<p>Now when you invoke <code>make help</code> it will parse these and generate your help output.</p>
<p>In addition to a generic help output you can expose some configuration settings with <code>make vars</code>.
To do so define the variables you'd like to print with <code>PRINT_VARS := VAR1 VAR2 VAR3</code>.</p>
<p>In addition to the <code>help</code> and <code>vars</code> recipes you can use a custom make function to format your text for fancier output.
For this there are two options depending on your needs <code>tprint</code> or <code>tprint-sh</code>. (<code>tprint-sh</code> is for use within a multiline sub-shell that has already been silenced, see the version-check rule of this project's <code>Makefile</code> for an example.)</p>
<p>To use <code>tprint</code> you call it with the builtin <code>make</code> call function.
It accepts only one argument: an unquoted f-string literal.
All strings passed to <code>tprint</code> have access to an object <code>ansi</code> or <code>a</code> for simplicity.
This stores ANSI escape codes which can be used to style your text.</p>
<p><div class="highlight"><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="c">## build | compile the source</span>
<a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a><span class="nf">.PHONY</span><span class="o">:</span> <span class="n">build</span>
<a id="__codelineno-1-3" name="__codelineno-1-3" href="#__codelineno-1-3"></a><span class="nf">build</span><span class="o">:</span>
<a id="__codelineno-1-4" name="__codelineno-1-4" href="#__codelineno-1-4"></a> <span class="k">$(</span>call tprint,<span class="o">{</span>a.cyan<span class="o">}</span>Build Starting<span class="o">{</span>a.end<span class="o">}</span><span class="k">)</span>
<a id="__codelineno-1-5" name="__codelineno-1-5" href="#__codelineno-1-5"></a> ...
<a id="__codelineno-1-6" name="__codelineno-1-6" href="#__codelineno-1-6"></a> <span class="k">$(</span>call tprint,<span class="o">{</span>a.green<span class="o">}</span>Build Finished<span class="o">{</span>a.end<span class="o">}</span><span class="k">)</span>
</code></pre></div>
See this projects <code>make info</code> for more examples of <code>tprint</code>.</p>
<p>To see the available colors and formatting(bold,italic,etc.) use the hidden recipe <code>make _print-ansi</code>.</p>
<p><strong>Note</strong>: Any help commands starting with an underscore will be ignored.
To view hidden <code>tasks</code> (or recipes in GNU Make land) you can use <code>make _help</code>.</p>
<p>In addition, you can use custom colors using the builtin <code>ansi.custom</code> or (<code>a.custom</code>) method.
It has two optional arguments <code>fg</code> and <code>bg</code>. Which can be used to specify either an 8-bit color from the <a href="https://en.wikipedia.org/wiki/8-bit_color">256 colors</a>.
Or a tuple/list to define an RBG 24-bit color, for instance <code>a.custom(fg=(5,10,255))</code>.
See this project's <code>make info</code> for an example.</p>
<h2 id="configuration">Configuration</h2>
<p>You can quickly customize some of the default behavior of <code>task.mk</code> by overriding the below variables prior to the <code>-include .task.mk</code>.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a><span class="c"># ---- CONFIG ---- #</span>
<a id="__codelineno-2-2" name="__codelineno-2-2" href="#__codelineno-2-2"></a><span class="nv">HEADER_STYLE</span> <span class="o">?=</span> b_cyan
<a id="__codelineno-2-3" name="__codelineno-2-3" href="#__codelineno-2-3"></a><span class="nv">PARAMS_STYLE</span> <span class="o">?=</span> b_magenta
<a id="__codelineno-2-4" name="__codelineno-2-4" href="#__codelineno-2-4"></a><span class="nv">ACCENT_STYLE</span> <span class="o">?=</span> b_yellow
<a id="__codelineno-2-5" name="__codelineno-2-5" href="#__codelineno-2-5"></a><span class="nv">GOAL_STYLE</span> <span class="o">?=</span> <span class="k">$(</span>ACCENT_STYLE<span class="k">)</span>
<a id="__codelineno-2-6" name="__codelineno-2-6" href="#__codelineno-2-6"></a><span class="nv">MSG_STYLE</span> <span class="o">?=</span> faint
<a id="__codelineno-2-7" name="__codelineno-2-7" href="#__codelineno-2-7"></a><span class="nv">DIVIDER_STYLE</span> <span class="o">?=</span> default
<a id="__codelineno-2-8" name="__codelineno-2-8" href="#__codelineno-2-8"></a><span class="nv">DIVIDER</span> <span class="o">?=</span>
<a id="__codelineno-2-9" name="__codelineno-2-9" href="#__codelineno-2-9"></a><span class="nv">HELP_SEP</span> <span class="o">?=</span>
<a id="__codelineno-2-10" name="__codelineno-2-10" href="#__codelineno-2-10"></a>
<a id="__codelineno-2-11" name="__codelineno-2-11" href="#__codelineno-2-11"></a><span class="c"># python f-string literals</span>
<a id="__codelineno-2-12" name="__codelineno-2-12" href="#__codelineno-2-12"></a><span class="nv">EPILOG</span> <span class="o">?=</span>
<a id="__codelineno-2-13" name="__codelineno-2-13" href="#__codelineno-2-13"></a><span class="cp">define USAGE ?=</span>
<a id="__codelineno-2-14" name="__codelineno-2-14" href="#__codelineno-2-14"></a><span class="nf">{ansi.$(HEADER_STYLE)}usage{ansi.end}</span><span class="o">:</span>
<a id="__codelineno-2-15" name="__codelineno-2-15" href="#__codelineno-2-15"></a> make &lt;recipe&gt;
<a id="__codelineno-2-16" name="__codelineno-2-16" href="#__codelineno-2-16"></a>
<a id="__codelineno-2-17" name="__codelineno-2-17" href="#__codelineno-2-17"></a><span class="cp">endef</span>
</code></pre></div>
<p>To use a custom color for one of the predefined configuration variables specify only the custom method.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-3-1" name="__codelineno-3-1" href="#__codelineno-3-1"></a><span class="nv">HEADER_STYLE</span> <span class="o">=</span> custom<span class="o">(</span><span class="nv">fg</span><span class="o">=</span><span class="m">171</span>,bg<span class="o">=</span><span class="m">227</span><span class="o">)</span>
</code></pre></div>
<p><strong>NOTE</strong>: <code>HELP_SEP</code> does not change the argument definitions syntax only the format of <code>make help</code>.</p>
<h2 id="advanced-usage-embedded-python-scripts">Advanced Usage: Embedded Python Scripts</h2>
<p>You can take advantage of the builtin python script runner and write multi-line python scripts of your own.
This is a simple example but a few lines of python in your <code>Makefile</code>
may be easier than balancing sub-shells and strung together awk commands.</p>
<p>When <code>make</code> expands the function it will take the parameters passed to <code>py</code> and expand them.
<code>$(1)</code> is the variable name and <code>$(2)</code> in this case is the implicit pattern from the rule. Pay attention to quotes.
If you need to debug your python script, use <code>DEBUG=1</code> when you run <code>make</code> and it will first print the script that will be piped to <code>python</code>.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-4-1" name="__codelineno-4-1" href="#__codelineno-4-1"></a><span class="cp">define list_files_py</span>
<a id="__codelineno-4-2" name="__codelineno-4-2" href="#__codelineno-4-2"></a><span class="err">from</span><span class="w"> </span><span class="err">pathlib</span><span class="w"> </span><span class="err">import</span><span class="w"> </span><span class="err">Path</span><span class="w"></span>
<a id="__codelineno-4-3" name="__codelineno-4-3" href="#__codelineno-4-3"></a><span class="err">print(</span><span class="s2">&quot;files in $(2)&quot;</span><span class="err">)</span><span class="w"></span>
<a id="__codelineno-4-4" name="__codelineno-4-4" href="#__codelineno-4-4"></a><span class="err">print([f.name</span><span class="w"> </span><span class="err">for</span><span class="w"> </span><span class="err">f</span><span class="w"> </span><span class="err">in</span><span class="w"> </span><span class="err">(Path(</span><span class="s2">&quot;$(2)&quot;</span><span class="err">).iterdir())])</span><span class="w"></span>
<a id="__codelineno-4-5" name="__codelineno-4-5" href="#__codelineno-4-5"></a><span class="cp">endef</span>
<a id="__codelineno-4-6" name="__codelineno-4-6" href="#__codelineno-4-6"></a>
<a id="__codelineno-4-7" name="__codelineno-4-7" href="#__codelineno-4-7"></a><span class="c">## list-% | use pathlib.Path to list files</span>
<a id="__codelineno-4-8" name="__codelineno-4-8" href="#__codelineno-4-8"></a><span class="nf">list-%</span><span class="o">:</span>
<a id="__codelineno-4-9" name="__codelineno-4-9" href="#__codelineno-4-9"></a> <span class="k">$(</span>call py,list_files_py,<span class="nv">$*</span><span class="k">)</span>
</code></pre></div>
<p>For what it's worth there is also a predefined function for <code>bash</code> (named <code>tbash</code>) as well should you need to accomplish something similar of more easily embedding your bash script rather than having to escape every line with a backslash.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-5-1" name="__codelineno-5-1" href="#__codelineno-5-1"></a><span class="cp">define bash_script</span>
<a id="__codelineno-5-2" name="__codelineno-5-2" href="#__codelineno-5-2"></a><span class="nf">figlet task.mk 2&gt;/dev/null || echo &#39;no figlet </span><span class="o">:</span>(&#39;
<a id="__codelineno-5-3" name="__codelineno-5-3" href="#__codelineno-5-3"></a><span class="err">echo</span><span class="w"> </span><span class="s2">&quot;This is from bash&quot;</span><span class="w"></span>
<a id="__codelineno-5-4" name="__codelineno-5-4" href="#__codelineno-5-4"></a><span class="err">cat</span><span class="w"> </span><span class="err">/etc/hostname</span><span class="w"></span>
<a id="__codelineno-5-5" name="__codelineno-5-5" href="#__codelineno-5-5"></a><span class="err">printf</span><span class="w"> </span><span class="s2">&quot;%s\n&quot;</span><span class="w"> </span><span class="s2">&quot;$(2)&quot;</span><span class="w"></span>
<a id="__codelineno-5-6" name="__codelineno-5-6" href="#__codelineno-5-6"></a><span class="cp">endef</span>
<a id="__codelineno-5-7" name="__codelineno-5-7" href="#__codelineno-5-7"></a><span class="nf">.PHONY</span><span class="o">:</span> <span class="n">test</span>-<span class="n">bash</span>
<a id="__codelineno-5-8" name="__codelineno-5-8" href="#__codelineno-5-8"></a><span class="nf">test-bash</span><span class="o">:</span>
<a id="__codelineno-5-9" name="__codelineno-5-9" href="#__codelineno-5-9"></a> <span class="k">$(</span>call tbash,bash_script,test bash multiline<span class="k">)</span>
</code></pre></div>
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