Ubuntu-latest workflows will use Ubuntu-20.04

[AlenaSviridenko]

UPDATE: Migration has been finished and all ubuntu-latest builds are using Ubuntu 20.04

Ubuntu-20.04 is ready to be the default version for the “ubuntu-latest” label in GitHub Actions and Azure DevOps. This change will be rolled out over a period of several weeks beginning on November, 30. (December, 22 - January, 4 will be a migration break due to holidays)

If you see any issues with your workflows during this transition period:

• File an issue in this repository
• Switch back to Ubuntu 18.04 by specifying the “ubuntu-18.04” label. We will continue to support Ubuntu 18.04.

Note that image software between Ubuntu-18.04 and Ubuntu-20.04 differs not only by the pre-installed versions of tools, but also by the default versions of some tools. See the list of missing and changes software below.

Software differences

Tool name	Ubuntu 18.04	Ubuntu 20.04	Notes
AWS CLI	1.18.173	2.0.62	These two versions have major set of breaking changes. See migration guide for details
.NET Core	2.1.x, 3.0.x, 3.1.x	2.1.x, 3.1.x	.NET Core 3.0 was removed (3.0.100, 3.0.101, 3.0.102, 3.0.103). NET Core 3.0 has reached end of life, meaning it is no longer supported and not recommended to use. If you still need it, consider using setup-dotnet and UseNetCore tasks.
Java	7 8(default) 11 12	8 11(default)	If you need to use other versions of Java, consider using setup-java and Java tool installer tasks.
Android	17.0 - 30.0	27.0 - 30.0	Android Platforms and build tools < 27.0 were removed from image. Consider installation in runtime using sdkmanager
Ruby	2.5.1	2.7.0	Default Ruby was changed from 2.5.x to 2.7.x. Consider using setup-ruby and UseRuby tasks.
Ruby toolcache	2.4 2.5 2.6 2.7	2.5 2.6 2.7	Ruby 2.4 will become unavailable via install tasks
Python3	3.6.9	3.8.2	Default Python will be updated from 3.6 to 3.8. Consider using setup-python or UsePython to switch version
PHP	7.1 7.2 7.3 7.4 8.0	7.4 8.0	-
Azure PowerShell	1.0.0, 1.6.0, 2.3.2, 2.6.0, 2.8.0, 3.1.0, 3.5.0, 3.8.0, 4.3.0, 4.4.0, 4.6.0, 4.7.0	4.8.0	-
Boost	1.72.0	-	Boost is not pre-installed on Ubuntu 20.04 image
MySQL	5.7	8.0	See migration guide for more details about breaking changes
SVN	1.9.7	1.13.0	-
Swig	3.0.12	4.0.1	-
libcurl apt package	libcurl3	libcurl4	-
Clang	6 8 9 (default)	8 9 10(default)	-

Missing software

Known issues:

• libcurl3 missing in the repo, replaced with libcurl4
• Python2 is absent on Ubuntu 20, but required for some packages to install. Can be installed via apt-get install python-is-python2 or via toolcache
• Python2 pip should be installed separately(curl https://bootstrap.pypa.io/get-pip.py --output get-pip.py, python2 get-pip.py)
• Ansible should be installed from the official Ubuntu repo, ppa:ansible/ansible isn't updated yet
• Set condition in git-lfs installation (Ubuntu 18 & 20 can install git-lfs from Ubuntu repo)
• Android SDK should be pointed to Java8 explicitly

Deprecated:

Haskell: https://launchpad.net/~hvr/+archive/ubuntu/ghc-eol

• ghc-8.0.2
• ghc-8.2.2
• ghc-8.4.4
• ghc-8.6.2
• ghc-8.6.3
• ghc-8.6.4
• ghc-8.8.1
• ghc-8.8.2
• cabal-install-2.0
• cabal-install-2.2
• cabal-install-2.4
• cabal-install-3.0

.Net Core

2.2 — EOL December 23, 2019:

• 2.2.402/dotnet-sdk-2.2.402-linux-x64.tar.gz
• 2.2.401/dotnet-sdk-2.2.401-linux-x64.tar.gz
• 2.2.301/dotnet-sdk-2.2.301-linux-x64.tar.gz
• 2.2.300/dotnet-sdk-2.2.300-linux-x64.tar.gz
• 2.2.207/dotnet-sdk-2.2.207-linux-x64.tar.gz
• 2.2.206/dotnet-sdk-2.2.206-linux-x64.tar.gz
• 2.2.205/dotnet-sdk-2.2.205-linux-x64.tar.gz
• 2.2.204/dotnet-sdk-2.2.204-linux-x64.tar.gz
• 2.2.203/dotnet-sdk-2.2.203-linux-x64.tar.gz
• 2.2.202/dotnet-sdk-2.2.202-linux-x64.tar.gz
• 2.2.110/dotnet-sdk-2.2.110-linux-x64.tar.gz
• 2.2.109/dotnet-sdk-2.2.109-linux-x64.tar.gz
• 2.2.108/dotnet-sdk-2.2.108-linux-x64.tar.gz
• 2.2.107/dotnet-sdk-2.2.107-linux-x64.tar.gz
• 2.2.106/dotnet-sdk-2.2.106-linux-x64.tar.gz
• 2.2.105/dotnet-sdk-2.2.105-linux-x64.tar.gz
• 2.2.104/dotnet-sdk-2.2.104-linux-x64.tar.gz
• 2.2.103/dotnet-sdk-2.2.103-linux-x64.tar.gz
• 2.2.102/dotnet-sdk-2.2.102-linux-x64.tar.gz
• 2.2.101/dotnet-sdk-2.2.101-linux-x64.tar.gz
• 2.2.100/dotnet-sdk-2.2.100-linux-x64.tar.gz

3.0 — EOL March 3, 2020:

• 3.0.103/dotnet-sdk-3.0.103-linux-x64.tar.gz
• 3.0.102/dotnet-sdk-3.0.102-linux-x64.tar.gz
• 3.0.101/dotnet-sdk-3.0.101-linux-x64.tar.gz
• 3.0.100/dotnet-sdk-3.0.100-linux-x64.tar.gz

Azure PowerShell

• 1.0.0
• 1.6.0
• 2.3.2
• 2.6.0
• 2.8.0
• 3.1.0
• 3.5.0

Each major Go release is supported until there are two newer major releases. For example, Go 1.5 was supported until the Go 1.7 release, and Go 1.6 was supported until the Go 1.8 release. We fix critical problems, including critical security problems, in supported releases as needed by issuing minor revisions

GOLang

• Go 1.11,1.12,1.13

Java:

• Java 7
• Default JDK set to 11

PHP

• 7.1
• 7.2
• 7.3

Android:

• "platforms;android-26"
• "platforms;android-25"
• "platforms;android-24"
• "platforms;android-23"
• "platforms;android-22"
• "platforms;android-21"
• "platforms;android-19"
• "platforms;android-17"
• "build-tools;26.0.3"
• "build-tools;26.0.2"
• "build-tools;26.0.1"
• "build-tools;26.0.0"
• "build-tools;25.0.3"
• "build-tools;25.0.2"
• "build-tools;25.0.1"
• "build-tools;25.0.0"
• "build-tools;24.0.3"
• "build-tools;24.0.2"
• "build-tools;24.0.1"
• "build-tools;24.0.0"
• "build-tools;23.0.3"
• "build-tools;23.0.2"
• "build-tools;23.0.1"
• "build-tools;22.0.1"
• "build-tools;21.1.2"
• "build-tools;20.0.0"
• "build-tools;19.1.0"
• "add-ons;addon-google_apis-google-24"
• "add-ons;addon-google_apis-google-23"
• "add-ons;addon-google_apis-google-22"
• "add-ons;addon-google_apis-google-21"
• "cmake;3.6.4111459"