Developing software in the Real World
Now that I've upgraded to macOS 10.12 Sierra, I noticed that SSH required me to enter my passphrase to keys every time I used them. This was a surprise as it's not how 10.11 El Capitan worked. This is how to fix it. Firstly, add your SSH key's passphrase to the keychain using ssh-add -K ~/.ssh/id_rsa (or any other key file). You can now use your SSH key without re-typing the password all the time… continue reading.
Once I installed Homebrew's curl for HTTP/2 usage, I discovered that I couldn't automatically proxy SSL through Charles Proxy any more. $ export HTTPS_PROXY=https://localhost:8888 $ curl https://api.joind.in/v2.1/ curl: (60) SSL certificate problem: self signed certificate in certificate chain More details here: https://curl.haxx.se/docs/sslcerts.html curl performs SSL certificate verification by default, using a "bundle" of Certificate Authority (CA) public keys (CA certs). If the default bundle file isn't adequate, you can specify an alternate file using the… continue reading.
It's been a while since I could use a trackpad without pain and even longer since I could use a mouse or trackball. Currently I use a Wacom tablet as my mouse which works really well as long as I don't use it too much. Fortunately, keyboard usage doesn't seem to be a problem (yet?), so I try to use only the keyboard as much as possible on macOS (née OS X). These are some… continue reading.
This had me stumped for a bit, so I've written it down. If you have a 64 bit version of Ubuntu and want to install a 32-bit package, you simply add :i386 to the end of the package name like this:
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$ sudo apt-get install libstdc++6:i386 |
However, this didn't initially work for me as apt-get couldn't find the package:
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$ sudo apt-get install libstdc++6:i386 Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package libstdc++6 E: Couldn't find any package by regex 'libstdc++6' |
It turned out that my installation only had the 64 bit architecture configured which you can tell by running:… continue reading.
Note: run these from the top level of your repo. Clone a repo with submodules:
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$ git clone git@bitbucket.org:akrabat/dotvim.git .vim $ git submodule update --init |
View status of all submodules:
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$ git submodule status |
Update submodules after switching branches:
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$ git submodule update |
Add a submodule:
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$ git submodule add git://github.com/tpope/vim-sensible.git bundle/vim-sensible |
Update all submodules to latest remote version
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$ git submodule update --remote --merge $ git commit -m "Update submodules" |
Update a specific submodule to the latest version (explicit method):
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cd bundle/vim-sensible git pull origin master cd ../.. git add bundle/vim-sensible git commit -m "update vim-sensible" |
Remove a submodule:
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edit .gitmodules and remove this submodule's section $ git rm --cached bundle/vim-sensible $ rm -rf bundle/vim-sensible $ git commit -m "Remove vim-sensible" |
or
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git submodule deinit bundle/vim-sensible git rm bundle/vim-sensible git commit -m "Remove vim-sensible" |
Docs: Manual page on submodules Git book chapter on submodules LornaJane's guide to submodules
I have a client that requires me to use a VPN when connecting to their servers. I use OS X's built in L2TP VPN to connect, but don't want all my traffic going that way. To do this, I unchecked the Advanced VPN setting "Send all traffic over VPN connection" in the Network preferences and then created the file /etc/ppp/ip-up like this:
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sudo touch /etc/ppp/ip-up sudo chmod 755 /etc/ppp/ip-up |
The file itself is a bash script that runs various /sbin/route commands… continue reading.
I've been setting up a Vagrant VM for use with some client projects and picked Ansible to do this. Firstly, I played with the Ansible provisioner, but found it a little slow and then I realised that Ansible doesn't run on Windows. Rather than migrate what I'd done to Puppet, Evan recommended that I look into running Ansible on the guest instead and provided some hints. This turned out to be quite easy. These are… continue reading.
I have a couple of projects where I need to push to more than one repo all the time. I have been using this command line to do so:
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git push origin && git push other-remote |
However, I recently discovered that I can create a remote that points to more than one repository using these commands:
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git remote add all git@github.com:akrabat/projectname.git git remote set-url --add all ssh://example.com/path/to/projectname.git |
I now have a remote called all that will push to both repositories! There's no automatic way to go the other way and fetch… continue reading.
One change I made recently to my .profile is this:
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# up & down map to history search once a command has been started. bind '"\e[A":history-search-backward' bind '"\e[B":history-search-forward' |
These two bind command change the way that the up and down arrow keys work once you start typing a command to only search the history for lines that start with what you've typed so far. This means that I type, say, git and then press ↑ & ↓ to go through all the times I've typed a git command without having to go… continue reading.
I've recently been changing joind.in's Vagrant system to use Debian and one issue I came across was getting Mailcatcher to start on boot and integrate property with the service command. To do this, I created an init script which is based off the skeleton and then stored this in /etc/init.d and then ran update-rc.d mailcatcher defaults to set up the correct links in the various rc.d directories. This is the init script: /etc/init.d/mailcatcher:
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#! /bin/sh ### BEGIN INIT INFO # Provides: mailcatcher # Required-Start: $remote_fs $syslog # Required-Stop: $remote_fs $syslog # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: Example initscript # Description: This file should be used to construct scripts to be # placed in /etc/init.d. ### END INIT INFO # Do NOT "set -e" # PATH should only include /usr/* if it runs after the mountnfs.sh script PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/rvm/gems/ruby-1.9.3-p547/bin DESC="Super simple SMTP server" NAME=mailcatcher DAEMON=/usr/local/rvm/wrappers/default/$NAME DAEMON_ARGS=" --http-ip 0.0.0.0" PIDFILE=/var/run/$NAME.pid SCRIPTNAME=/etc/init.d/$NAME # Exit if the package is not installed [ -x "$DAEMON" ] || exit 0 # Read configuration variable file if it is present [ -r /etc/default/$NAME ] && . /etc/default/$NAME # Load the VERBOSE setting and other rcS variables . /lib/init/vars.sh # Define LSB log_* functions. # Depend on lsb-base (>= 3.2-14) to ensure that this file is present # and status_of_proc is working. . /lib/lsb/init-functions # # Function that starts the daemon/service # do_start() { # Return # 0 if daemon has been started # 1 if daemon was already running # 2 if daemon could not be started start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \ || return 1 start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- \ $DAEMON_ARGS \ || return 2 # Add code here, if necessary, that waits for the process to be ready # to handle requests from services started subsequently which depend # on this one. As a last resort, sleep for some time. # Create the PIDFILE pidof mailcatcher >> $PIDFILE } # # Function that stops the daemon/service # do_stop() { # Return # 0 if daemon has been stopped # 1 if daemon was already stopped # 2 if daemon could not be stopped # other if a failure occurred if [ -f "$PIDFILE" ] then kill `cat $PIDFILE` rm -f $PIDFILE return 0 else return 1 fi } # # Function that sends a SIGHUP to the daemon/service # do_reload() { # # If the daemon can reload its configuration without # restarting (for example, when it is sent a SIGHUP), # then implement that here. # start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME return 0 } case "$1" in start) [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME" do_start case "$?" in 0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;; 2) [ "$VERBOSE" != no ] && log_end_msg 1 ;; esac ;; stop) [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME" do_stop case "$?" in 0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;; 2) [ "$VERBOSE" != no ] && log_end_msg 1 ;; esac ;; status) status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $? ;; #reload|force-reload) # # If do_reload() is not implemented then leave this commented out # and leave 'force-reload' as an alias for 'restart'. # #log_daemon_msg "Reloading $DESC" "$NAME" #do_reload #log_end_msg $? #;; restart|force-reload) # # If the "reload" option is implemented then remove the # 'force-reload' alias # log_daemon_msg "Restarting $DESC" "$NAME" do_stop case "$?" in 0|1) do_start case "$?" in 0) log_end_msg 0 ;; 1) log_end_msg 1 ;; # Old process is still running *) log_end_msg 1 ;; # Failed to start esac ;; *) # Failed to stop log_end_msg 1 ;; esac ;; *) #echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2 echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2 exit 3 ;; esac : |
As… continue reading.
Rob Allen is a PHP and Zend Framework expert based in Worcester, UK. He runs Nineteen Feet, is the author of Zend Framework in Action.
Around the web:
Twitter: @akrabat
Instagram: akrabat1
Flickr: photos
GitHub: Rob Allen
IRC: akrabat on freenode
