Skip to main content

How to Apply Vim Settings to cat Command

I first sought out a solution for the absence of colordiff in my new work environment, which I had next to zero control over what packages get installed.  So basically, I would output my diffs into a file then open it in vim.  Eventually that got really annoying and I wanted something I can run in a single command, such as svn diff | less.  So naturally, I was looking for a simple way to read a diff and have the colors differentiate modifications.  Not long after, I found this thread and discovered one can vim in less mode!  This essentially lets you pipe out string and scroll through it, all with your vim settings.

Add a new command script called vless using the less macro vim provides:
cp /usr/share/vim/vim{version}/macros/less.sh /usr/local/bin/vless

Then use vless instead of less and enjoy life in color!
svn diff | vless

Comments

Popular posts from this blog

Python alias commands that play nice with virtualenv

There are plenty of predefined Python executables, symlinks, and aliases that come bundled with your operating system. These commands come in very handy because it saves you from typing out long commands or chain of scripts. However the downfall of operating system aliases is that they don’t always play nice with virtualenv (or venv if you’re on Python 3). Most predefined aliases use the system’s default Python as the interpreter, which is next to useless when your application runs in a virtual environment. Over the years, I’ve come up with my own Python aliases that play nice with virtual environments. For this post, I tried to stay as generic as possible such that any alias here can be used by every Pythonista. In other words, there will be no aliases for specific frameworks such as running a Django server or starting a Scrappy spider. The following is one of my bash scripts I source: .py-aliases #----- Pip -----# alias pip-list="pip freeze | less" alias pip-search...

Simple self signed TLS server and client using Twisted

Self signed TLS server and client using Twisted Prerequisites openssl twisted & pyOpenSSL modules- pip install twisted[tls] treq module - pip install treq Basic knowledge of Twisted TCP servers/clients Generate self signed certificate Generate the server's private key using a secret, which is SuperSecretPassword in this case. openssl genrsa -aes256 -passout pass:SuperSecretPassword -out server.key 2048 Perform a CSR (certificate signing request). Ensure the FQDN (fully qualified domain name) matches the hostname of the server, otherwise the server won't be properly validated. openssl req -new -key server.key -passin pass:SuperSecretPassword -out server.csr # Common Name (e.g. server FQDN or YOUR name) []:localhost openssl x509 -req -passin pass:SuperSecretPassword -days 1024 -in server.csr -signkey server.key -out server.crt For development purposes, remove the password from the certificate. openssl rsa -in server.key -out server_no_pass.key -passin pas...

Embed Scrapy in WSGI Application

WSGI and Scrapy A common question on Scrapy Stackoverflow is "How to use Scrapy with Flask, Django, or any other Python web framework?" Most are used to using the Scrapy’s generated projects and cli options, which make crawling a breeze, but are confused when trying to integrate Scrapy into a WSGI web framework. A common traceback encountered is ReactorNotRestartable , which stems from the underlaying Twisted framework. This occurs because, unlike asyncio or Tornado, Twisted’s eventloop/reactor cannot be restarted once stopped (the reason is a bit out of scope). So it becomes apparent that the trick to integrating Scrapy and WSGI frameworks involves being able to tame Twisted. Luckily, integrating async Twisted code with synchronous code has become quite easy and is only getting easier. In this post, the following will be demonstrated: Embed a crawler in a WSGI app and run it using Twisted’s twist web WSGI server. Embed a crawler in a WSGI app and run it any WSGI serve...