1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
|
<!DOCTYPE html>
<html lang="en" data-content_root="../">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="viewport" content="width=device-width, initial-scale=1" />
<title>string-collect - join strings into one — fish-shell 4.2.1 documentation</title>
<link rel="stylesheet" type="text/css" href="../_static/pygments.css?v=4da8bbd6" />
<link rel="stylesheet" type="text/css" href="../_static/pydoctheme.css?v=f89b4716" />
<script src="../_static/documentation_options.js?v=6fb65176"></script>
<script src="../_static/doctools.js?v=9bcbadda"></script>
<script src="../_static/sphinx_highlight.js?v=dc90522c"></script>
<link rel="index" title="Index" href="../genindex.html" />
<link rel="search" title="Search" href="../search.html" />
<link rel="next" title="string-escape - escape special characters" href="string-escape.html" />
<link rel="prev" title="string - manipulate strings" href="string.html" />
<link rel="shortcut icon" type="image/png" href="../_static/fish.png" />
</head><body><div id="fmain">
<div class="related" role="navigation" aria-label="Related">
<h3>Navigation</h3>
<ul>
<li><img src="../_static/fish.png" alt=""
style="width: 80px; height: 80px; vertical-align: middle; margin-top: -1px"/></li>
<li><a href="https://fishshell.com/">fish-shell</a> »</li>
<a href="../index.html">fish-shell 4.2.1 documentation</a> »
<li class="nav-item nav-item-1"><a href="../commands.html" accesskey="U">Commands</a> »</li>
<li class="nav-item nav-item-this"><a href="">string-collect - join strings into one</a></li>
<li class="right">
<div class="inline-search" role="search">
<form class="inline-search" action="../search.html" method="get">
<input placeholder="Quick search" type="text" name="q" />
<input type="submit" value="Go" />
<input type="hidden" name="check_keywords" value="yes" />
<input type="hidden" name="area" value="default" />
</form>
</div>
</li>
<div id="old-docs-notice" style="display: none">
This documents an old version of fish.
<a href="../../current/">See the latest release.</a>
</div>
</ul>
</div>
<div class="document">
<div class="sphinxsidebar" role="navigation" aria-label="Main">
<div class="sphinxsidebarwrapper">
<div>
<h3><a href="../index.html">Documents</a></h3>
<ul class="current">
<li class="toctree-l1"><a class="reference internal" href="../index.html">Introduction</a></li>
<li class="toctree-l1"><a class="reference internal" href="../faq.html">Frequently asked questions</a></li>
<li class="toctree-l1"><a class="reference internal" href="../interactive.html">Interactive use</a></li>
<li class="toctree-l1"><a class="reference internal" href="../language.html">The fish language</a></li>
<li class="toctree-l1 current"><a class="reference internal" href="../commands.html">Commands</a></li>
<li class="toctree-l1"><a class="reference internal" href="../fish_for_bash_users.html">Fish for bash users</a></li>
<li class="toctree-l1"><a class="reference internal" href="../tutorial.html">Tutorial</a></li>
<li class="toctree-l1"><a class="reference internal" href="../completions.html">Writing your own completions</a></li>
<li class="toctree-l1"><a class="reference internal" href="../prompt.html">Writing your own prompt</a></li>
<li class="toctree-l1"><a class="reference internal" href="../design.html">Design</a></li>
<li class="toctree-l1"><a class="reference internal" href="../relnotes.html">Release notes</a></li>
<li class="toctree-l1"><a class="reference internal" href="../terminal-compatibility.html">Terminal Compatibility</a></li>
<li class="toctree-l1"><a class="reference internal" href="../contributing.html">Contributing To Fish</a></li>
<li class="toctree-l1"><a class="reference internal" href="../license.html">License</a></li>
</ul>
</div>
<search id="searchbox" style="display: none" role="search">
<h3 id="searchlabel">Quick search</h3>
<div class="searchformwrapper">
<form class="search" action="../search.html" method="get">
<input type="text" name="q" aria-labelledby="searchlabel" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"/>
<input type="submit" value="Go" />
</form>
</div>
</search>
<script>document.getElementById('searchbox').style.display = "block"</script>
<div>
<h4><a href="../index.html">Sections</a></h4>
<ul>
<li><a class="reference internal" href="#">string-collect - join strings into one</a><ul>
<li><a class="reference internal" href="#synopsis">Synopsis</a></li>
<li><a class="reference internal" href="#description">Description</a></li>
<li><a class="reference internal" href="#examples">Examples</a></li>
</ul>
</li>
</ul>
</div>
</div>
</div>
<div class="documentwrapper">
<div class="bodywrapper">
<div class="body" role="main">
<section id="string-collect-join-strings-into-one">
<h1>string-collect - join strings into one<a class="headerlink" href="#string-collect-join-strings-into-one" title="Link to this heading">¶</a></h1>
<section id="synopsis">
<h2>Synopsis<a class="headerlink" href="#synopsis" title="Link to this heading">¶</a></h2>
<div class="highlight-fish-synopsis notranslate"><div class="highlight"><pre><span></span><span class="nf">string</span><span class="w"> </span><span class="no">collect</span><span class="w"> </span><span class="g g-Other">[</span><span class="no">-a</span><span class="w"> </span><span class="g g-Other">|</span><span class="w"> </span><span class="no">--allow-empty</span><span class="g g-Other">]</span><span class="w"> </span><span class="g g-Other">[</span><span class="no">-N</span><span class="w"> </span><span class="g g-Other">|</span><span class="w"> </span><span class="no">--no-trim-newlines</span><span class="g g-Other">]</span><span class="w"> </span><span class="g g-Other">[</span><span class="no">STRING</span><span class="w"> </span><span class="g g-Other">...]</span>
</pre></div>
</div>
</section>
<section id="description">
<h2>Description<a class="headerlink" href="#description" title="Link to this heading">¶</a></h2>
<p><code class="docutils literal notranslate"><span class="pre">string</span> <span class="pre">collect</span></code> collects its input into a single output argument, without splitting the output when used in a command substitution. This is useful when trying to collect multiline output from another command into a variable. Exit status: 0 if any output argument is non-empty, or 1 otherwise.</p>
<p>A command like <code class="docutils literal notranslate"><span class="pre">echo</span> <span class="pre">(cmd</span> <span class="pre">|</span> <span class="pre">string</span> <span class="pre">collect)</span></code> is mostly equivalent to a quoted command substitution (<code class="docutils literal notranslate"><span class="pre">echo</span> <span class="pre">"$(cmd)"</span></code>). The main difference is that the former evaluates to zero or one elements whereas the quoted command substitution always evaluates to one element due to string interpolation.</p>
<p>If invoked with multiple arguments instead of input, <code class="docutils literal notranslate"><span class="pre">string</span> <span class="pre">collect</span></code> preserves each argument separately, where the number of output arguments is equal to the number of arguments given to <code class="docutils literal notranslate"><span class="pre">string</span> <span class="pre">collect</span></code>.</p>
<p>Any trailing newlines on the input are trimmed, just as with <code class="docutils literal notranslate"><span class="pre">"$(cmd)"</span></code> substitution. Use <strong>--no-trim-newlines</strong> to disable this behavior, which may be useful when running a command such as <code class="docutils literal notranslate"><span class="pre">set</span> <span class="pre">contents</span> <span class="pre">(cat</span> <span class="pre">filename</span> <span class="pre">|</span> <span class="pre">string</span> <span class="pre">collect</span> <span class="pre">-N)</span></code>.</p>
<p>With <strong>--allow-empty</strong>, <code class="docutils literal notranslate"><span class="pre">string</span> <span class="pre">collect</span></code> always prints one (empty) argument. This can be used to prevent an argument from disappearing.</p>
</section>
<section id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Link to this heading">¶</a></h2>
<div class="highlight-fish-docs-samples notranslate"><div class="highlight"><pre><span></span><span class="gp">>_ </span><span class="nf">echo</span><span class="w"> </span><span class="s2">"zero </span><span class="o">$(</span><span class="nf">echo</span><span class="w"> </span><span class="no">one</span><span class="se">\n</span><span class="no">two</span><span class="se">\n</span><span class="no">three</span><span class="o">)</span><span class="s2"> four"</span>
<span class="go">zero one</span>
<span class="go">two</span>
<span class="go">three four</span>
<span class="gp">>_ </span><span class="nf">echo</span><span class="w"> </span><span class="se">\"</span><span class="o">(</span><span class="nf">echo</span><span class="w"> </span><span class="no">one</span><span class="se">\n</span><span class="no">two</span><span class="se">\n</span><span class="no">three</span><span class="w"> </span><span class="p">|</span><span class="w"> </span><span class="nf">string</span><span class="w"> </span><span class="no">collect</span><span class="o">)</span><span class="se">\"</span>
<span class="go">"one</span>
<span class="go">two</span>
<span class="go">three"</span>
<span class="gp">>_ </span><span class="nf">echo</span><span class="w"> </span><span class="se">\"</span><span class="o">(</span><span class="nf">echo</span><span class="w"> </span><span class="no">one</span><span class="se">\n</span><span class="no">two</span><span class="se">\n</span><span class="no">three</span><span class="w"> </span><span class="p">|</span><span class="w"> </span><span class="nf">string</span><span class="w"> </span><span class="no">collect</span><span class="w"> </span><span class="no">-N</span><span class="o">)</span><span class="se">\"</span>
<span class="go">"one</span>
<span class="go">two</span>
<span class="go">three</span>
<span class="go">"</span>
<span class="gp">>_ </span><span class="nf">echo</span><span class="w"> </span><span class="no">foo</span><span class="o">(</span><span class="nf">true</span><span class="w"> </span><span class="p">|</span><span class="w"> </span><span class="nf">string</span><span class="w"> </span><span class="no">collect</span><span class="w"> </span><span class="no">--allow-empty</span><span class="o">)</span><span class="no">bar</span>
<span class="go">foobar</span>
</pre></div>
</div>
</section>
</section>
<div class="clearer"></div>
</div>
</div>
</div>
<div class="clearer"></div>
</div>
<div class="related" role="navigation" aria-label="Related">
<h3>Navigation</h3>
<ul>
<li><img src="../_static/fish.png" alt=""
style="width: 80px; height: 80px; vertical-align: middle; margin-top: -1px"/></li>
<li><a href="https://fishshell.com/">fish-shell</a> »</li>
<a href="../index.html">fish-shell 4.2.1 documentation</a> »
<li class="nav-item nav-item-1"><a href="../commands.html" >Commands</a> »</li>
<li class="nav-item nav-item-this"><a href="">string-collect - join strings into one</a></li>
<li class="right">
<div class="inline-search" role="search">
<form class="inline-search" action="../search.html" method="get">
<input placeholder="Quick search" type="text" name="q" />
<input type="submit" value="Go" />
<input type="hidden" name="check_keywords" value="yes" />
<input type="hidden" name="area" value="default" />
</form>
</div>
</li>
<div id="old-docs-notice" style="display: none">
This documents an old version of fish.
<a href="../../current/">See the latest release.</a>
</div>
</ul>
</div>
<div class="footer">
© Copyright fish-shell developers.
<br />
<a href="https://github.com/fish-shell/fish-shell/issues">Found a bug</a>?
<br />
Created using <a href="https://www.sphinx-doc.org/">Sphinx</a> 8.2.3.
</div>
</div>
<script type="text/javascript">
FISH_DOCS_VERSION = "4.2";
function copy_to_clipboard(it) {
// Find the pre tag we're interested in.
var pre = it.target;
while (pre.tagName != "PRE") pre = pre.parentNode;
var txt = "";
// Cheesy: If we have a prompt,
// we only copy prompted lines,
// by splitting and matching and stuff
if (pre.querySelector('span.gp')) {
var texts= [];
for (var line of pre.innerText.split('\n')) {
if (line.match(/^>_?.*/)) {
texts.push(line.replace(/^>_?/, ""));
}
}
txt = texts.join("\n");
} else {
// Even cheesier: If we don't have a prompt, we remove the button text from the end.
var txt = pre.innerText.substring(0, pre.innerText.length - it.target.innerText.length).trim();
}
navigator.clipboard.writeText(txt).then(function() {
// Success - set the text to indicate it,
// then set it back after 2 seconds.
var span = pre.querySelector("button span");
if (span) {
var oldText = span.innerText;
span.innerText = "COPIED!";
setTimeout(function() {
span.innerText = oldText;
}, 2000);
}
}, function() {
});
}
(function () {
// Add copy buttons to all the codeblocks.
var codeblocks = document.querySelectorAll('div > pre');
var button = document.createElement('button');
var span = document.createElement('span');
span.innerText = "COPY";
button.appendChild(span);
for (var i of codeblocks) {
var newButton = button.cloneNode(true);
newButton.addEventListener('click', copy_to_clipboard);
i.appendChild(newButton);
}
})();
</script>
</body>
</html>
|
