Showing posts with label linux. Show all posts
Showing posts with label linux. Show all posts

Thursday, 6 September 2018

Some handy Git tips - show latest commits and searching the log and more

This article will present some tips around Git and how you can add functionality for showing the latest commits and search the log. I would like to search these aliased command to show you how they can ease your everyday use of Git from the commandline.

[alias]

glog = log --all --decorate --oneline --graph

glogf = log --all --decorate --oneline --graph --pretty=fuller

st = status

out      = !git fetch && git log FETCH_HEAD..

outgoing = !git fetch && git log FETCH_HEAD..

in       = !git fetch && git log ..FETCH_HEAD

incoming = !git fetch && git log ..FETCH_HEAD

com = "!w() { git commit --all --message \"$1\";  }; w"

undopush = "!w() { git revert HEAD~\"$1\"..HEAD;  }; w"

searchlog = "!f() { git --no-pager log --color-words --all --decorate --graph -i --grep \"$1\";  }; f"

branches =  branch --verbose --sort=-committerdate --format '%(HEAD)%(color:yellow)%(refname:short)%(color:reset) -%(color:red)%(objectname:short)%(color:reset) - %(contents:subject) -%(authorname) (%(color:green)%(committerdate:relative)%(color:reset))'

allbranches = "!g() { git branch --all --verbose --sort=-committerdate --format '%(HEAD) %(color:yellow)%(refname:short)%(color:reset) -%(color:red)%(objectname:short)%(color:reset) - %(contents:subject) -%(authorname) (%(color:green)%(committerdate:relative)%(color:reset))' --color=always | less -R;  }; g"
verify = fsck
clearlocal = clean -fd && git reset 
stash-unapply = !git stash show -p | git apply -R 
lgb = log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset%n' --abbrev-commit --date=relative --branches tree = log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset%n' --abbrev-commit --date=relative --branches alltree = log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset%n' --date=relative --branches --all
latest = "!f() { echo "Latest \"${1:-11}\" commits accross all branches:"; git log  --abbrev-commit --date=relative --branches --all --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset%n' -n ${1:-11};  } ; f"
add-commit = !git add -A && git commit
showconfig = config --global -e

[merge]
tool = kdiff3

[mergetool "kdiff3"]
cmd = \"C:\\\\Program Files\\\\KDiff3\\\\kdiff3\" $BASE $LOCAL $REMOTE -o $MERGED [core]
editor = 'c:/program files/sublime text 3/subl.exe' -w

[core]
editor = 'c:/Program Files/Sublime Text 3/sublime_text.exe'

The best aliases are how you set up Sublime Text 3 as the Git editor and also how you can show the latest commits. The latest commits use a parametrized shell function. I set the default value to 11 in this case, if you do not give a parameter. You can for example show the latest 2 commits by typing: git latest 2
latest = "!f() { echo "Latest \"${1:-11}\" commits accross all branches:"; git log  --abbrev-commit --date=relative --branches --all --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset%n' -n ${1:-11};  } ; f"
Note the use of a shell function and also that we refer to the first parameter as ${1} i bash shell script, with a :-11 to set the first param as 11. The syntax is ${n:-p} where n is the nth parameter (not starting with zero!) and p is the default value. A special syntax, but that is how bash works. Also note that a git alias with a shell function can do multiple functions, separated with semi-colon ;. The searchlog alias / shell function is also handy:
searchlog = "!f() { git --no-pager log --color-words --all --decorate --graph -i --grep \"$1\";  }; f"
Also, multiple aliases here are similar to Mercurial's in and out commands to detect incoming pushed commits and outgoing local commits. Happy Git-ing!

Sunday, 19 August 2018

Creating a VM in Azure with Powershell core in Linux

This article will describe how a virtual machine in Azure from a command line in Linux. Powershell core will be used and I have tested this procedure using the Linux distribution MX-17 Horizon. First, we will update the package list for APT (Advanced Packaging Tool), get the latest versions of cURL and apt-transport-https and add the GPG key for the Microsoft repository for Powershell core. Then APT is once more updated and the package powershell is installed. The following script works on Debian-based distributions:
 sudo apt-get install 
 sudo apt-get install curl apt-transport-https
 curl https://packages.microsoft.com/keys/microsoft.asc | sudo apt-key add -
 
 sudo sh -c 'echo "deb [arch=amd64] https://packages.microsoft.com/repos/microsoft-debian-jessie-prod jessie main" > /etc/apt/sources.list.d/microsoft.list'

 sudo apt-get update
 sudo apt-get install -y powershell 
 
On my system however, I need to make use of Snap packages. This is because MX-Horizon fails to install powershell due to restrictions on libssl1.0 and libicu52. Anyways this route let me start up Powershell on MX-17 Horizon:
 sudo apt-get install snapd
 sudo snap install powershell-preview --classic
 sudo snap run powershell-preview 
 






Logging into Azure RM account

Running powershell-preview allows you to both run Powershell commands such as Get-ChildItem ("ls") and Unix tools such as ls (!) from the Powershell command line. We will first install the Powershell module AzureRM.NetCore inside the Powershell session, which is running.
 Install-Module AzureRM.Netcore
 Get-Command -Module AzureRM.Compute.Netcore
 

The last command is executed to check that the Powershell module is available. Type [Y] to allow the module installation in the first step. Next off, logging into the Azure Resource Manager. Type the following command in Powershell core:
 Login-AzureRMAccount
 
Running this command will prompt a code and tell you to open up a browser window and log on to: https://microsoft.com/devicelogin Then you log in to your Azure account and if you are successfully logged in, your Powershell core session is authenticated and you can access your Azure account and its resources!

Creating the Virtual machine in Azure

Creating the virtual machine is done in several steps. The script below is to be saved into a Powershell script file, forexample AzureVmCreate.ps1. There are many steps involved into establishing an installation of a VM in Azure. We will in this sample set up all the necessities to get an Ubuntu Server LTS. If you already have got for example a resource group in Azure, the script below can use this resource group instead of creating a new one. The list of steps are as follows to create a Linux VM in Azure:
  • Create a resource group
  • Create a subnet config
  • Create a virtual network, set it up with the subnet config
  • Create a public IP
  • Create a security rule config to allow port 22 (SSH)
  • Create a network security group nsg and add in the security rule config
  • Create a network interface card nic and associate it with the public ip and the nsg
  • Create a VM config and set the operating system, OS image and nic
  • Create a VM config's SHH public key config
  • Create a VM - Virtual Machine in Azure !

param([string]$resourceGroupName,
       [string]$resourceGroupLocation,
       [string]$vmComputerName,
       [string]$vmUser, 
       [string]$vmUserPassword,
       [string]$virtualNetworkName)
#Write-Host $resourceGroupName
#Write-Host $resourceGroupLocation
#Write-Host $vmComputerName
#Write-Host $vmUser
#Write-Host $vmUserPassword

# Definer user name and blank password
$securePassword = ConvertTo-SecureString ' ' -AsPlainText -Force
$cred = New-Object System.Management.Automation.PSCredential ("azureuser", $securePassword)

New-AzureRmResourceGroup -Name $resourceGroupName -Location $resourceGroupLocation 

$subnetConfig = New-AzureRmVirtualNetworkSubnetConfig -Name default -AddressPrefix 10.0.0.0/24  

$virtualNetwork = New-AzureRMVirtualNetwork -ResourceGroupName $resourceGroupName -Name `
$virtualNetworkName -AddressPrefix 10.0.0.0/16 -Location $resourceGroupLocation `
-Subnet $subnetConfig

Write-Host "Subnet id: " $virtualNetwork.Subnets[0].Id

# Create a public IP address and specify a DNS name
$pip = New-AzureRmPublicIpAddress -ResourceGroupName $resourceGroupName -Location $resourceGroupLocation `
  -Name "mypublicdns$(Get-Random)" -AllocationMethod Static -IdleTimeoutInMinutes 4

# Create an inbound network security group rule for port 22
$nsgRuleSSH = New-AzureRmNetworkSecurityRuleConfig -Name myNetworkSecurityGroupRuleSSH  -Protocol Tcp `
  -Direction Inbound -Priority 1000 -SourceAddressPrefix * -SourcePortRange * -DestinationAddressPrefix * `
  -DestinationPortRange 22 -Access Allow

# Create a network security group
$nsg = New-AzureRmNetworkSecurityGroup -ResourceGroupName $resourceGroupName -Location $resourceGroupLocation `
  -Name myNetworkSecurityGroup -SecurityRules $nsgRuleSSH

# Create a virtual network card and associate with public IP address and NSG
$nic = New-AzureRmNetworkInterface -Name myNic -ResourceGroupName $resourceGroupName -Location $resourceGroupLocation `
  -SubnetId $virtualNetwork.Subnets[0].Id -PublicIpAddressId $pip.Id -NetworkSecurityGroupId $nsg.Id


# Create a virtual machine configuration
$vmConfig = New-AzureRmVMConfig -VMName $vmComputerName -VMSize Standard_D1 | `
Set-AzureRmVMOperatingSystem -Linux -ComputerName $vmComputerName -Credential $cred -DisablePasswordAuthentication | `
Set-AzureRmVMSourceImage -PublisherName Canonical -Offer UbuntuServer -Skus 14.04.2-LTS -Version latest | `
Add-AzureRmVMNetworkInterface -Id $nic.Id


# Configure SSH Keys
$sshPublicKey = Get-Content "$HOME/.ssh/id_rsa.pub"
Add-AzureRmVMSshPublicKey -VM $vmconfig -KeyData $sshPublicKey -Path "/home/azureuser/.ssh/authorized_keys"

# Create a virtual machine
New-AzureRmVM -ResourceGroupName $resourceGroupName -Location $resourceGroupLocation -VM $vmConfig

 
We can then instantiate a new VM in Azure running the script above, which will create a standard D1 blade server in Azure with approx. 3,5 GB RAM and 30 GB disk space with Ubuntu Server LTS latest from the publisher Canonical by calling this script like for example: ./AzureVmCreate.ps1 -resourceGroupName "SomeResourceGroup" -resourceGroupLocation "northcentralus" "SomeVmComputer" -vmUser "adminUser" -password "s0m3CoolPassw0rkzzD" -virtualNetworkName "SomeVirtualNetwork" After the VM is created, which for me took about 5 minutes time before the VM was up and running in Azure, you can access it by visiting the Azure portal at https://portal.azure.com You can then take notice of the public IP adress that the script in this article created and connect with : ssh azureuser@ip_address_to_linux_VM_you_just_created_in_Azure! The following images shows me logging into the Ubuntu Server LTS Virtual Machine that was created with the Powershell core script in this article!
A complete list of available Linux images can be seen in the Azure marketplace or in the Microsoft Docs: Linux VMs in Azure overview After installation, you can run the following cmdlet to clean up the resource group and all its resources, including the VM you created for testing.
  Remove-AzureRmResourceGroup -Name myResourceGroup
 

Tuesday, 3 July 2018

Basic WCF solution in Monodevelop

Basic WCF Solution in Monodevelop

I created a basic solution with a WCF Servicehost and client in Monodevelop today using MX Linux 17 "Horizon". To check it out, clone the following repository:
git clone https://bitbucket.org/toreaurstad/hellowcfmono
The source code is small and can be seen in a browser here: HelloWcfMono source code
If you have not installed Monodevelop in Linux yet, it is available as package "Monodevelop", "Monodevel" or "Monodevelop-complete", for example in MX-Linux I used:
apt-get install monodevel

The HelloWcf solution consists of three projects. The Service project is a console project, running the ServiceHost through the console. You will want to tweak Monodevelop to use External Console by right clicking and selecting Options=>Run=>General: "Run on external console". I just installed xterm to use the console as it is (apt get install xterm). In case Monodevelop crashes when you open the .sln file, another problem with Monodevelop, you can run the following command to open the .sln file directly in the root folder of the cloned repository.: monodevelop HelloWcf.sln
To run the WCF sample, right click on the Host project and choose Set as Startup project Choose first to Rebuild all (Ctrl+F8) to build the Service, Host and Client projects. Now press F5 to debug the Host project. The terminal window should show up, indicating that the WCF Service is running:



Now, switch over to a new terminal window and navigate to the Client project. Go to the bin folder, then the Debug folder. If you did not build Client, there are no files here, so do this now by right clicking on the Client project in Monodevelop and choose build. Now a file called Client.exe should pop up in your console. To run the client, enter: mono Client.exe Then you provide the Service a string through a call WCF service call with the proxy (Client) and get a reply. This project is really the basic set up of a client to get started coding WCF Servicehost and a proxy supporting BasicHttpBinding in .NET System.ServiceModel (which Mono actually supports). Developers can now use Linux and Monodevelop for example and commit code, while other developers use other platforms. The same .sln file can be openened in Visual Studio in Windows for example, while front-end guys use Apple to do their bit. Monodevelop is truly a possible bridge and will you will save money on license costs and freedom to add a lot of free software to use to build your projects. So what are you waiting for, grab hold of Monodevelop today and Linux and try it out! Nice thing to see that Mono framework supports WCF, much can be developed for .NET in Linux!

Friday, 8 December 2017

Finding old Git Branches with WSL and Bash

Finding old branches in Git

I had to find out which branches in a Git repository was old and output it to a file. An old branch is defined to have no commits the last four months. Here is the bash script I ended up with.




#!/bin/bash

resolveOldBranches(){
branchfile="oldbranches.txt"
declare -i branchiteration=0
branchcount=$(git branch -a | wc -l)

if [ ! -e $branchfile ] ; then
 touch $branchfile
fi

#empty the oldbranch file
: > $branchfile

for k in $(git branch -a | sed /\*/d); do


 if [ -z "$(git log -1 --since='4 months ago' -s $k)" ]; then
  echo $k | cut -d/ -f3 >> $branchfile
 fi
 branchiteration=$branchiteration+1
 percentage= bc <<< "scale=2;($branchiteration/$branchcount)*100"


 read -n 1 -t 0.1 input                  # so read doesn't hang
   if [[ $input = "q" ]] || [[ $input = "Q" ]]
   then
      echo # to get a newline after 
echo -e "XXX\n$($percentage)\nAnalyzing $branchiteration of $branchcount $(bc <<< "scale=2;($branchiteration/$branchcount)*100") % done. \n(Exit: Q/q)... \nXXX"

done | whiptail --title "Resolving OpPlan 4 branch ages" --gauge "Analyzing.. (Press Q or q to exit)" 10 60 0


}

resolveOldBranches
cat $branchfile