Re: [External] re: Adding a directory to LOAD_PATH

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On Thu, Nov 7, 2019 at 9:42 AM Tran, Minh <[email protected]>
wrote:

> Thank you so much Leam.
> I would like to load the kinetic-sdk.rb program in
> /vendor/kinetic-sdk-rb/  to my current working directory /my_project ;
> so would the following command work ?
>
> $LOAD_PATH << File.expand_path("/vendor/kinectic-sdk-rb", __FILE__)
>

File.expand_path converts things like ".." and "~" to absolute paths; since
you already have an absolute path you don't need it here. You can just say
$LOAD_PATH << "/vendor/kinetic-sdk-rb".

Also, if you want to load the file as require
"kinetic-sdk-rb/kinetic-sdk.rb" then you want only /vendor in your
$LOAD_PATH, not /vendor/kinetic-sdk-rb - the require path is relative to
the LOAD_PATH entry. Here's an example:


$ mkdir -p /tmp/ruby/foo

$ cat > /tmp/ruby/foo/bar.rb
def f
  puts "hello world"
end

$ irb
irb(main):001:0> $LOAD_PATH << "/tmp/ruby"
=> ["/usr/share/rubygems-integration/all/gems/did_you_mean-1.2.1/lib",
"/usr/local/lib/site_ruby/2.5.0",
"/usr/local/lib/x86_64-linux-gnu/site_ruby", "/usr/local/lib/site_ruby",
"/usr/lib/ruby/vendor_ruby/2.5.0",
"/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.5.0",
"/usr/lib/ruby/vendor_ruby", "/usr/lib/ruby/2.5.0",
"/usr/lib/x86_64-linux-gnu/ruby/2.5.0", "/tmp/ruby"]
irb(main):002:0> require 'foo/bar'
=> true
irb(main):003:0> f
hello world

martin

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<div dir=3D"ltr"><div dir=3D"ltr">On Thu, Nov 7, 2019 at 9:42 AM Tran, Minh=
 &lt;<a href=3D"mailto:[email protected]">minh.tran@emoryhealth=
care.org</a>&gt; wrote:<br></div><div class=3D"gmail_quote"><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex">




<div dir=3D"ltr">
<div style=3D"color:rgb(0,0,0);font-family:Calibri,Arial,Helvetica,sans-ser=
if;font-size:12pt">
Thank you so much Leam. </div>
<div style=3D"color:rgb(0,0,0);font-family:Calibri,Arial,Helvetica,sans-ser=
if;font-size:12pt">
I would like to=C2=A0load the kinetic-sdk.rb program in /vendor/kinetic-sdk=
-rb/=C2=A0=C2=A0to my current working directory /my_project ;
</div>
<div style=3D"color:rgb(0,0,0);font-family:Calibri,Arial,Helvetica,sans-ser=
if;font-size:12pt">
so would the following command work ?</div>
<div style=3D"color:rgb(0,0,0);font-family:Calibri,Arial,Helvetica,sans-ser=
if;font-size:12pt">
<br>
</div>
<div style=3D"color:rgb(0,0,0);font-family:Calibri,Arial,Helvetica,sans-ser=
if;font-size:12pt">
<font size=3D"3">$LOAD_PATH &lt;&lt; File.expand_path(&quot;/vendor/kinecti=
c-sdk-rb&quot;, __FILE__)</font>=C2=A0 =C2=A0</div></div></blockquote><div>=
<br></div><div>File.expand_path converts things like &quot;..&quot; and &qu=
ot;~&quot; to absolute paths; since you already have an absolute path you d=
on&#39;t need it here. You can just say $LOAD_PATH &lt;&lt; &quot;/vendor/k=
inetic-sdk-rb&quot;.</div><div><br></div><div>Also, if you want to load the=
 file as require &quot;kinetic-sdk-rb/kinetic-sdk.rb&quot; then you want on=
ly /vendor in your $LOAD_PATH, not /vendor/kinetic-sdk-rb - the require pat=
h is relative to the LOAD_PATH entry. Here&#39;s an example:</div><div><br>=
</div><div><font face=3D"monospace"><br></font></div><div><font face=3D"mon=
ospace">$ mkdir -p /tmp/ruby/foo<br><br></font></div><div><font face=3D"mon=
ospace">$ cat &gt; /tmp/ruby/foo/bar.rb<br>def f =C2=A0 <br>=C2=A0 puts &qu=
ot;hello world&quot;<br>end<br><br></font></div><div><font face=3D"monospac=
e">$ irb<br>irb(main):001:0&gt; $LOAD_PATH &lt;&lt; &quot;/tmp/ruby&quot;<b=
r>=3D&gt; [&quot;/usr/share/rubygems-integration/all/gems/did_you_mean-1.2.=
1/lib&quot;, &quot;/usr/local/lib/site_ruby/2.5.0&quot;, &quot;/usr/local/l=
ib/x86_64-linux-gnu/site_ruby&quot;, &quot;/usr/local/lib/site_ruby&quot;, =
&quot;/usr/lib/ruby/vendor_ruby/2.5.0&quot;, &quot;/usr/lib/x86_64-linux-gn=
u/ruby/vendor_ruby/2.5.0&quot;, &quot;/usr/lib/ruby/vendor_ruby&quot;, &quo=
t;/usr/lib/ruby/2.5.0&quot;, &quot;/usr/lib/x86_64-linux-gnu/ruby/2.5.0&quo=
t;, &quot;/tmp/ruby&quot;]<br>irb(main):002:0&gt; require &#39;foo/bar&#39;=
<br>=3D&gt; true<br>irb(main):003:0&gt; f<br>hello world</font><br></div><d=
iv><br></div><div>martin=C2=A0</div></div></div>

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