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Task: Add `merge` command docs Resolves: #35
2017-09-23 19:33:23 +00:00
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Overwrite values
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Overwrite values with arrays
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<h1>Merge</h1>
<p>Yaml files can be merged using the 'merge' command. Each additional file merged with the first file will
set values for any key not existing already or where the key has no value.</p>
<pre><code>yaml m &lt;yaml_file|json_file&gt; &lt;path&gt;...
</code></pre>
<p>This command can take a json file as input too, and will output yaml unless specified to export as json (-j)</p>
<h3 id="to-stdout">To Stdout<a class="headerlink" href="#to-stdout" title="Permanent link">&para;</a></h3>
<p>Given a data1.yaml file of:</p>
<pre><code class="yaml">a: simple
b: [1, 2]
</code></pre>
<p>and data2.yaml file of:</p>
<pre><code class="yaml">a: other
c:
test: 1
</code></pre>
<p>then</p>
<pre><code class="bash">yaml m data1.yaml data2.yaml
</code></pre>
<p>will output:</p>
<pre><code class="yaml">a: simple
b: [1, 2]
c:
test: 1
</code></pre>
<h3 id="updating-files-in-place">Updating files in-place<a class="headerlink" href="#updating-files-in-place" title="Permanent link">&para;</a></h3>
<p>Given a data1.yaml file of:</p>
<pre><code class="yaml">a: simple
b: [1, 2]
</code></pre>
<p>and data2.yaml file of:</p>
<pre><code class="yaml">a: other
c:
test: 1
</code></pre>
<p>then</p>
<pre><code class="bash">yaml m -i data1.yaml data2.yaml
</code></pre>
<p>will update the data1.yaml file so that the value of 'c' is 'test: 1'.</p>
<h3 id="overwrite-values">Overwrite values<a class="headerlink" href="#overwrite-values" title="Permanent link">&para;</a></h3>
<p>Given a data1.yaml file of:</p>
<pre><code class="yaml">a: simple
b: [1, 2]
</code></pre>
<p>and data2.yaml file of:</p>
<pre><code class="yaml">a: other
c:
test: 1
</code></pre>
<p>then</p>
<pre><code class="bash">yaml m -x data1.yaml data2.yaml
</code></pre>
<p>will output:</p>
<pre><code class="yaml">a: other
b: [1, 2]
c:
test: 1
</code></pre>
<h3 id="overwrite-values-with-arrays">Overwrite values with arrays<a class="headerlink" href="#overwrite-values-with-arrays" title="Permanent link">&para;</a></h3>
<p>Given a data1.yaml file of:</p>
<pre><code class="yaml">a: simple
b: [1, 2]
</code></pre>
<p>and data3.yaml file of:</p>
<pre><code class="yaml">b: [2, 3, 4]
c:
test: 2
other: true
d: false
</code></pre>
<p>then</p>
<pre><code class="bash">yaml m -x data1.yaml data3.yaml
</code></pre>
<p>will output:</p>
<pre><code class="yaml">a: simple
b: [2, 3, 4]
c:
test: 2
other: true
d: false
</code></pre>
<p>Notice that 'b' does not result in the merging of the values within an array. The underlying library does not
currently handle merging values within an array.</p>
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