ssp

How to extract a single file with its history from a git repository

These steps show two less common interactions with git to extract a single file which is inside a subfolder from a git repository. These steps essentially reduce the repository to just the desired files and should performed on a copy of the original repository (1.).

First the repository is reduced to just the subfolder containing the files in question using git filter-branch --subdirectory-filter (2.) which is a useful step by itself if just a subfolder needs to be extracted. This step moves the desired files to the top level of the repository.

Finally all remaining files are listed using git ls, the files to keep are removed from that using grep -v and the resulting list is passed to git rm which is invoked by git filter-branch --index-filter (3.). A bit convoluted but it does the trick.

1. copy the repository to extract the file from and go to the desired branch

obscurerichard

slow

This bash script offers quick shortcuts to simulate slower network connections. It is useful when you need to simulate a wireless network on a Linux network server, especially when you are using a virtual machine guest on your local machine or in the cloud.

slow 3G                   # Slow network on default eth0 down to 3G wireless speeds
slow reset                # Reset connection for default eth0 to normal
slow vsat --latency=500ms # Simulate satellite internet  with a high latency
slow dsl -b 1mbps         # Simulate DSL with a slower speed than the default

slow modem-56k -d eth0 # Simulate a 56k modem on the eth1 device. eth0 is unchanged.

jbenet

a simple git branching model (written in 2013)

This is a very simple git workflow. It (and variants) is in use by many people. I settled on it after using it very effectively at Athena. GitHub does something similar; Zach Holman mentioned it in this talk.

Update: Woah, thanks for all the attention. Didn't expect this simple rant to get popular.

kujohn

Port Forwarding in Mavericks

---

Since Mavericks stopped using the deprecated ipfw (as of Mountain Lion), we'll be using pf to allow port forwarding.

####1. anchor file Create an anchor file under /etc/pf.anchors/<anchor file> with your redirection rule like:

ryanzhou

Getting Pow to work in OS X Yosemite

Some parts taken from: https://gist.github.com/kujohn/7209628

ipfw is officially deprecated and removed in OS X Yosemite. Pow requires another program pf to handle the port forwarding.

1. Anchor file

Create file /etc/pf.anchors/pow

micw

#!/bin/bash

set -e

if [ $# -eq 0 ]; then
  echo "USAGE: $0 plugin1 plugin2 ..."
  exit 1
fi

plugin_dir=/var/lib/jenkins/plugins

denilsonsa

slow

This bash script offers quick shortcuts to simulate slower network connections. It is useful when you need to simulate a wireless network on a Linux network server, especially when you are using a virtual machine guest on your local machine or in the cloud.

slow 3G                   # Slow network on default eth0 down to 3G wireless speeds
slow 3G -l 600ms -p 10%   # slow network on eth0 and setup latency to 600ms packetloss to 10%
slow reset                # Reset connection for default eth0 to normal
slow vsat --latency=500ms # Simulate satellite internet  with a high latency

slow dsl -b 1mbps # Simulate DSL with a slower speed than the default

chuxau

#!/bin/bash

set -e

UPDATES_URL="http://updates.jenkins-ci.org/download/plugins/"

if [ $# -lt 2 ]; then
  echo "USAGE: $0 plugin-list-file destination-directory"
  exit 1
fi

dev-0x7C6

image: crops/yocto:ubuntu-20.04-base

variables:
    GIT_SUBMODULE_STRATEGY: recursive
    LANG: "C.UTF-8"
    LC_ALL: "C.UTF-8"
    DL_DIR: "/cache/downloads"
    CCACHE_TOP_DIR: "/cache/ccache"
    SSTATE_DIR: "/cache/sstate"
    BB_ENV_EXTRAWHITE: "DL_DIR CCACHE_TOP_DIR SSTATE_DIR"