git-linter/modules/git_lint/option_handler.html

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<h1>Source code for git_lint.option_handler</h1><div class="highlight"><pre>
<span></span><span class="c1"># Copyright (C) 2015 Elf M. Sternberg</span>
<span class="c1"># Author: Elf M. Sternberg</span>
<span class="kn">from</span> <span class="nn">functools</span> <span class="k">import</span> <span class="n">reduce</span>
<span class="kn">from</span> <span class="nn">collections</span> <span class="k">import</span> <span class="n">namedtuple</span>
<span class="kn">import</span> <span class="nn">getopt</span>
<span class="k">try</span><span class="p">:</span> <span class="c1"># noqa: F401</span>
<span class="kn">from</span> <span class="nn">typing</span> <span class="k">import</span> <span class="n">Dict</span><span class="p">,</span> <span class="n">List</span><span class="p">,</span> <span class="n">Text</span><span class="p">,</span> <span class="n">Any</span><span class="p">,</span> <span class="n">Optional</span><span class="p">,</span> <span class="n">Union</span><span class="p">,</span> <span class="n">Callable</span><span class="p">,</span> <span class="n">Tuple</span> <span class="c1"># noqa: F401</span>
<span class="k">except</span><span class="p">:</span> <span class="c1"># noqa: F401</span>
<span class="k">pass</span> <span class="c1"># noqa: F401</span>
<span class="n">Option</span> <span class="o">=</span> <span class="n">namedtuple</span><span class="p">(</span><span class="s1">&#39;Option&#39;</span><span class="p">,</span> <span class="p">[</span><span class="s1">&#39;short&#39;</span><span class="p">,</span> <span class="s1">&#39;long&#39;</span><span class="p">,</span> <span class="s1">&#39;takes&#39;</span><span class="p">,</span> <span class="s1">&#39;help&#39;</span><span class="p">,</span> <span class="s1">&#39;conflicts&#39;</span><span class="p">])</span> <span class="c1"># type: str, str, str, str, List[str]</span>
<span class="n">Arguments</span> <span class="o">=</span> <span class="n">namedtuple</span><span class="p">(</span><span class="s1">&#39;Arguments&#39;</span><span class="p">,</span> <span class="p">[</span><span class="s1">&#39;arguments&#39;</span><span class="p">,</span> <span class="s1">&#39;filenames&#39;</span><span class="p">,</span> <span class="s1">&#39;excluded&#39;</span><span class="p">])</span> <span class="c1"># type: Dict[str, str], List[str], List[str]</span>
<span class="c1"># This was a lot shorter and smarter in Hy...</span>
<span class="c1"># A lot of what you see here is separated from git_lint itself, since this will not be</span>
<span class="c1"># relevant to the operation of pre-commit.</span>
<span class="c1"># ___ _ _ _</span>
<span class="c1"># / __|___ _ __ _ __ __ _ _ _ __| | | | (_)_ _ ___</span>
<span class="c1"># | (__/ _ \ &#39; \| &#39; \/ _` | &#39; \/ _` | | |__| | &#39; \/ -_)</span>
<span class="c1"># \___\___/_|_|_|_|_|_\__,_|_||_\__,_| |____|_|_||_\___|</span>
<span class="c1">#</span>
<div class="viewcode-block" id="cleanup_options"><a class="viewcode-back" href="../../git_lint.html#git_lint.option_handler.cleanup_options">[docs]</a><span class="k">def</span> <span class="nf">cleanup_options</span><span class="p">(</span><span class="n">options</span><span class="p">,</span> <span class="n">commandline</span><span class="p">):</span>
<span class="c1"># type: (List[Option], List[str]) -&gt; Arguments</span>
<span class="sd">&quot;&quot;&quot;Takes a table of options and the commandline, and returns a</span>
<span class="sd"> dictionary of those options that appear on the commandline</span>
<span class="sd"> along with any extra arguments.</span>
<span class="sd"> :param List(Tuple (string, string, boolean, string, List(string))) options,</span>
<span class="sd"> The table of options: One-letter option, long option, takes arguments,</span>
<span class="sd"> Help text, list of (long) options superseded by this one.</span>
<span class="sd"> : param List(strings) commandline</span>
<span class="sd"> The arguments as received by the start-up process</span>
<span class="sd"> : returns List(strings), List(strings), List(strings)</span>
<span class="sd"> The longopt dictionary of arguments and associated values (if any)</span>
<span class="sd"> The list of filenames left after argument processing</span>
<span class="sd"> The longopt list of arguments that were excluded by argument precedence</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">def</span> <span class="nf">make_option_streamliner</span><span class="p">(</span><span class="n">options</span><span class="p">):</span>
<span class="c1"># type: (List[Option]) -&gt; Callable[[Dict[str, str], Option], Dict[str, str]]</span>
<span class="sd">&quot;&quot;&quot;Takes a list of option tuples, and returns a function that takes</span>
<span class="sd"> the output of getopt and reduces it to the longopt key and</span>
<span class="sd"> associated values as a dictionary.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">fullset</span> <span class="o">=</span> <span class="p">{}</span> <span class="c1"># type: Dict[str, str]</span>
<span class="k">for</span> <span class="n">option</span> <span class="ow">in</span> <span class="n">options</span><span class="p">:</span>
<span class="k">if</span> <span class="n">option</span><span class="o">.</span><span class="n">long</span><span class="p">:</span>
<span class="n">fullset</span><span class="p">[</span><span class="s1">&#39;--&#39;</span> <span class="o">+</span> <span class="n">option</span><span class="o">.</span><span class="n">long</span><span class="p">]</span> <span class="o">=</span> <span class="n">option</span><span class="o">.</span><span class="n">long</span>
<span class="k">if</span> <span class="n">option</span><span class="o">.</span><span class="n">short</span><span class="p">:</span>
<span class="n">fullset</span><span class="p">[</span><span class="s1">&#39;-&#39;</span> <span class="o">+</span> <span class="n">option</span><span class="o">.</span><span class="n">short</span><span class="p">]</span> <span class="o">=</span> <span class="n">option</span><span class="o">.</span><span class="n">long</span>
<span class="k">def</span> <span class="nf">streamliner</span><span class="p">(</span><span class="n">acc</span><span class="p">,</span> <span class="n">it</span><span class="p">):</span>
<span class="c1"># type: (Dict[str, str], Option) -&gt; Dict[str, str]</span>
<span class="n">acc</span><span class="p">[</span><span class="n">fullset</span><span class="p">[</span><span class="n">it</span><span class="p">[</span><span class="mi">0</span><span class="p">]]]</span> <span class="o">=</span> <span class="n">it</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
<span class="k">return</span> <span class="n">acc</span>
<span class="k">return</span> <span class="n">streamliner</span>
<span class="k">def</span> <span class="nf">remove_conflicted_options</span><span class="p">(</span><span class="n">options</span><span class="p">,</span> <span class="n">request</span><span class="p">):</span>
<span class="c1"># type: (List[Option], Dict[str, str]) -&gt; Tuple[List[str], List[str]]</span>
<span class="sd">&quot;&quot;&quot;Takes our list of option tuples, and a cleaned copy of what was</span>
<span class="sd"> requested from getopt, and returns a copy of the request</span>
<span class="sd"> without any options that are marked as superseded, along with</span>
<span class="sd"> the list of superseded options</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">def</span> <span class="nf">get_excluded_keys</span><span class="p">(</span><span class="n">memo</span><span class="p">,</span> <span class="n">option</span><span class="p">):</span>
<span class="k">return</span> <span class="n">memo</span> <span class="o">+</span> <span class="n">option</span><span class="o">.</span><span class="n">conflicts</span>
<span class="n">keys</span> <span class="o">=</span> <span class="n">request</span><span class="o">.</span><span class="n">keys</span><span class="p">()</span>
<span class="n">marked</span> <span class="o">=</span> <span class="p">[</span><span class="n">option</span> <span class="k">for</span> <span class="n">option</span> <span class="ow">in</span> <span class="n">options</span> <span class="k">if</span> <span class="n">option</span><span class="o">.</span><span class="n">long</span> <span class="ow">in</span> <span class="n">keys</span><span class="p">]</span>
<span class="n">exclude</span> <span class="o">=</span> <span class="n">reduce</span><span class="p">(</span><span class="n">get_excluded_keys</span><span class="p">,</span> <span class="n">marked</span><span class="p">,</span> <span class="p">[])</span>
<span class="n">excluded</span> <span class="o">=</span> <span class="p">[</span><span class="n">key</span> <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">keys</span> <span class="k">if</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">exclude</span><span class="p">]</span>
<span class="n">cleaned</span> <span class="o">=</span> <span class="p">{</span><span class="n">key</span><span class="p">:</span> <span class="n">request</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">keys</span>
<span class="k">if</span> <span class="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">excluded</span><span class="p">}</span>
<span class="k">return</span> <span class="p">(</span><span class="n">cleaned</span><span class="p">,</span> <span class="n">excluded</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">shortoptstogo</span><span class="p">(</span><span class="n">i</span><span class="p">):</span>
<span class="k">return</span> <span class="n">i</span><span class="o">.</span><span class="n">short</span> <span class="o">+</span> <span class="p">((</span><span class="n">i</span><span class="o">.</span><span class="n">takes</span> <span class="ow">and</span> <span class="s1">&#39;:&#39;</span><span class="p">)</span> <span class="ow">or</span> <span class="s1">&#39;&#39;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">longoptstogo</span><span class="p">(</span><span class="n">i</span><span class="p">):</span>
<span class="k">return</span> <span class="n">i</span><span class="o">.</span><span class="n">long</span> <span class="o">+</span> <span class="p">((</span><span class="n">i</span><span class="o">.</span><span class="n">takes</span> <span class="ow">and</span> <span class="s1">&#39;=&#39;</span><span class="p">)</span> <span class="ow">or</span> <span class="s1">&#39;&#39;</span><span class="p">)</span>
<span class="n">optstringsshort</span> <span class="o">=</span> <span class="s1">&#39;&#39;</span><span class="o">.</span><span class="n">join</span><span class="p">([</span><span class="n">shortoptstogo</span><span class="p">(</span><span class="n">opt</span><span class="p">)</span> <span class="k">for</span> <span class="n">opt</span> <span class="ow">in</span> <span class="n">options</span> <span class="k">if</span> <span class="n">opt</span><span class="o">.</span><span class="n">short</span><span class="p">])</span>
<span class="n">optstringslong</span> <span class="o">=</span> <span class="p">[</span><span class="n">longoptstogo</span><span class="p">(</span><span class="n">opt</span><span class="p">)</span> <span class="k">for</span> <span class="n">opt</span> <span class="ow">in</span> <span class="n">options</span><span class="p">]</span>
<span class="p">(</span><span class="n">chosen_options</span><span class="p">,</span> <span class="n">filenames</span><span class="p">)</span> <span class="o">=</span> <span class="n">getopt</span><span class="o">.</span><span class="n">getopt</span><span class="p">(</span><span class="n">commandline</span><span class="p">[</span><span class="mi">1</span><span class="p">:],</span>
<span class="n">optstringsshort</span><span class="p">,</span>
<span class="n">optstringslong</span><span class="p">)</span>
<span class="c1"># Turns what getopt returns into something more human-readable</span>
<span class="n">streamline_options</span> <span class="o">=</span> <span class="n">make_option_streamliner</span><span class="p">(</span><span class="n">options</span><span class="p">)</span>
<span class="c1"># Remove any options that are superseded by others.</span>
<span class="p">(</span><span class="n">ret</span><span class="p">,</span> <span class="n">excluded</span><span class="p">)</span> <span class="o">=</span> <span class="n">remove_conflicted_options</span><span class="p">(</span>
<span class="n">options</span><span class="p">,</span> <span class="n">reduce</span><span class="p">(</span><span class="n">streamline_options</span><span class="p">,</span> <span class="n">chosen_options</span><span class="p">,</span> <span class="p">{}))</span>
<span class="k">return</span> <span class="n">Arguments</span><span class="p">(</span><span class="n">ret</span><span class="p">,</span> <span class="n">filenames</span><span class="p">,</span> <span class="n">excluded</span><span class="p">)</span></div>
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