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Difference between revisions of "Funtoo:Metro/Initial Setup"

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The autosetup script provides a fast and convenient way of quickly setting up the metro build repository with a ''seed stage'' so that it is ready to start a metro build.
This page will walk you through setting up metro for the first time.


It is recommended to work from a container or an fchroot environment.  If you'd like to use a container, please follow the steps found at [[LXD]] to set up an lxd container from a Funtoo image. Or you can just use an fchroot environment, following the instructions.
== Cloning and configuring Metro ==


{{important|If you are using an LXD container to build a stage tarball for an architecture incompatible with the host, you need to make sure that your LXD setup supports that architecture or the build will fail.}}
Metro is run from its own git tree, and does not have its own ebuild. You can get the latest version of Metro from the git repository using git.  
 
== Setting up an fchroot Environment ==
 
=== Installing sys-apps/fchroot ===
 
Funtoo offers a convenient tool called {{c|sys-apps/fchroot}} to work in chroot environments, which will take care of any mounts you need to set up and also setting up the network within the chroot environment. Fchroot actually goes well beyond what a regular chroot can do (see [[Frankenchroot]]). In order to install it, just emerge the package:


{{console|body=
{{console|body=
# ##i##emerge -av sys-apps/fchroot
# ##i##cd /root
# ##i##git clone https://code.funtoo.org/bitbucket/scm/core/metro.git
}}
}}


=== Downloading the latest stage3 tarball  ===
== Installing dependencies ==


Choose a stage3 tarball from https://build.funtoo.org. The "Next release" x86-64bit generic build is a good choice in most cases:
Because the git repo is cloned directly, you will need to install some Python modules used by the scripts. Please make sure you have the following packages installed in your system:


{{console|body=
{{console|body=
$ ##i##wget https://build.funtoo.org/next/x86-64bit/generic_64/2022-09-13/stage3-generic_64-next-2022-09-13.tar.xz
# ##i##emerge -av dev-python/lxml dev-python/requests
}}
}}
{{note|metro is running as root and while not strictly necessary but best practice would be using dedicated environment such as [[LXD]] container or similar where you will run your builds.}} With this setup, before installing dependencies of metro, run {{c|ego sync}} in your container.
=== Configuring Metro ===


Then, create a directory and unpack the tarball into it:
The default options for metro are usually fine for most cases. If you are happy with the defaults, just copy the default configuration file to /root/.metro:


{{console|body=
{{console|body=
$ ##i##mkdir metro-chroot
# ##i##cp /root/metro/metro.conf /root/.metro
$ ##i##tar xJpvf stage3-generic_64-next-2022-09-13.tar.xz -C metro-chroot
}}
}}


=== Entering and setting up the fchroot environment  ===
Two things to note -- the {{c|/root/.metro}} file specifies ''where'' the metro git repository is installed -- and this must match where you put it on your system. If you are not using the location of {{c|/root/metro}}, then you will need to fix {{c|[section path] / install}} to reflect this.


By using Funtoo's {{c|sys-apps/fchroot}}, you don't need to worry about mounting file systems and setting up the network before chrooting. That will be done automatically for you.  All you need to do after you entered the environment is to create a meta repository using {{c|ego sync}}:
Also, metro will set up what is called a "mirror" -- this is an organized repository of stages that metro manages, and it uses the directory structure you will find at https://build.funtoo.org. By default, the path {{c|/home/mirror/funtoo}} is used as the base of this repository. This path is also defined in {{f|.metro}} and should be changed if you are using the non-default location.


{{console|body=
If you wish to further tweak the settings then you should edit {{f|.metro}} accordingly (see [[Funtoo:Metro/Configuring_Metro|Configuring_Metro]]) to learn how to do that.
# ##i##fchroot metro-chroot/
%fchroot% ##i##ego sync
}}


== Getting the necessary software ==
Now your system is ready to run Metro's automatic setup tool, which will take care of the rest of the preparation.


You will need git to clone Metro and some Python modules used by the scripts. If you are working from a stage3 tarball fchroot environment, {{c|dev-vcs/git}} and {{c|dev-python/requests}} are already provided for you. Please make sure you have the following packages installed in your system:
== Setting up your build ==


{{console|body=
The Python modules you installed earlier allows {{c|setup}} to run, which generally will take care of everything else. When you run {{c|setup}}, the following tasks will be performed:
%fchroot% ##i##emerge -av dev-vcs/git
%fchroot% ##i##emerge -av dev-python/lxml
%fchroot% ##i##emerge -av dev-python/requests
}}


== Cloning and configuring Metro ==
# Independent {{c|ego}} cloned to {{f|/root/ego}} (which is used by metro to create snapshots);
# If [[Package:fchroot]] is not installed, it will be emerged;
# A "seed" stage3 will be downloaded so that you can use it to build a new stage3;
# The "mirror" repository will be set up to build an up-to-date version of this stage3.


You can get the latest version of Metro from the git repository using git. Soon, it will also be available as an ebuild on your meta repository.
These steps are done automatically by the {{c|setup}} script, which only needs to be run once.


{{console|body=
When this is done, you will be able to use metro to perform a build on your system. Our simplified setup script will get you up and running with a basic metro configuration which we recommend for new users. Specifically, it will allow you to take one of our official Funtoo stage3's of a particular arch and subarch, and build an updated version of the same arch and subarch. If you want to set up another arch and subarch to build locally, it is safe to run setup a second time.
%fchroot% ##i##cd /root
%fchroot% ##i##git clone https://code.funtoo.org/bitbucket/scm/core/metro.git
}}


=== Configuring Metro ===
Let's launch setup:
The default options for metro are usually fine for most cases. If you are happy with the defaults, just copy the default configuration file to /root/.metro:


{{console|body=
{{console|body=
%fchroot% ##i##cp /root/metro/metro.conf /root/.metro
# ##i##/root/metro/scripts/setup
}}
}}


If you wish to tweak the settings then you should manually copy /path/to/metro/metro.conf to /root/.metro and edit accordingly (see [[Funtoo:Metro/Configuring_Metro|Configuring_Metro]]).
=== Selecting a release ===
 
Now your system is ready to run Metro's automatic setup tool, which will take care of the rest of the preparation.
 
== Setting up your build ==
 
Before you can start building your stage tarballs, you need to set up an independent {{c|ego}}, cloned from the git repository, install {{c|app-emulation/qemu}} with the correct USE flags for the architecture for which you are building the tarball.
 
These steps are done automatically by the {{c|setup}} script:
 
{{console|body=
%fchroot% ##i##/root/metro/scripts/setup
}}


=== Selecting a release ===
You can build a stage tarball for any of the available Funtoo releases.  Currently, these are the only releases available:
You can build a stage tarball for any of the available Funtoo releases.  Currently, these are the only releases available:
{{console|body=
{{console|body=
.##i##www.funtoo.org / funtoo
\##i##www.funtoo.org / funtoo


   ##i##1. 1.4-release-std
   ##i##1. 1.4-release-std
Line 111: Line 86:
=== Selecting an Architecture ===
=== Selecting an Architecture ===
Choose a general architecture from the menu. You'll have a chance to choose a more specific sub-architecture in the next step.
Choose a general architecture from the menu. You'll have a chance to choose a more specific sub-architecture in the next step.
{{console|body=
{{console|body=
.##i##www.funtoo.org / funtoo / next
\##i##www.funtoo.org / funtoo / next




Line 144: Line 120:
Choose the specific sub-architecture you wish to build your stage tarball for.
Choose the specific sub-architecture you wish to build your stage tarball for.
{{console|body=
{{console|body=
.##i##www.funtoo.org / funtoo / next / x86-64bit
\##i##www.funtoo.org / funtoo / next / x86-64bit


   ##i##1. amd64-bulldozer
   ##i##1. amd64-bulldozer
Line 168: Line 144:
.
.
}}
}}
Note that thanks to [[Package:fchroot]], you will be able to update an arm-64bit stage on an x86-64bit system if you want.
{{Important|More advanced uses of Metro allow for a new subarch to be "bootstrapped" from an existing subarch, but that is not provided as an option as it's a more sophisticated use of the tool and not ideal for your initial local build. Let's keep things simple to get started :)}}


=== Wait for the Setup to Complete ===
=== Wait for the Setup to Complete ===
The setup script will go through several steps to set up your build. If you are running it for the first time, these can include creating a new meta repository, installing supporting software and downloading a tarball, so it may take some time to complete.
The setup script will go through several steps to set up your build. If you are running it for the first time, this can include installing supporting software and downloading a tarball, so it may take some time to complete.


Here is a sample output:
Here is a sample output:
Line 201: Line 181:
To build a new release, use ezbuild (or set up buildbot):
To build a new release, use ezbuild (or set up buildbot):
   
   
##g##scripts/ezbuild.sh next x86-64bit generic_64 freshen+gnome
\##g##scripts/ezbuild.sh next x86-64bit generic_64 freshen+gnome
}}
}}


== Building a new release ==
== Building a new release ==


In the example above, a "next x86-64bit generic_64" build has been set up to build a new Gnome stage3 tarball using an existing stage3 tarball downloaded from https://build.funtoo.org. If your satisfied with that, you can just go ahead and run the command as suggested:
In the example above, a "next x86-64bit generic_64" build has been set up to build a new Gnome stage3 tarball after updating the existing stage3 tarball downloaded from https://build.funtoo.org. If you're satisfied with those settings, you can just go ahead and run the command as suggested:


{{console|body=
{{console|body=
%fchroot% ##i##/root/metro/scripts/ezbuild.sh next x86-64bit generic_64 freshen+gnome
# ##i##/root/metro/scripts/ezbuild.sh next x86-64bit generic_64 freshen+gnome
}}
}}


Otherwise, continue reading to learn how to create a stage3 tarball with different specs.
Otherwise, continue reading to learn how to create a stage3 tarball with different specs.


The first 3 arguments in the example above: 'next', 'x86-64bit' and 'intel64-ivybridge' correspond to the options you chose when you ran the setup script. If you'd like to run {{c|ezbuild.sh}} for a different release, architecture or sub-architecture, you need to run the setup script again with the appropriate options.
The first 3 arguments in the example above: 'next', 'x86-64bit' and 'generic_64' correspond to the options you chose when you ran the setup script. If you'd like to run {{c|ezbuild.sh}} for a different release, architecture or sub-architecture, you need to run the setup script again with the appropriate options. You only need to do this ''once'' per subarch -- just to make sure you have a local copy of the stage3 for that subarch. After that, {{c|ezbuild.sh}} can keep the stage3 updated using the most recent successfully-built stage3.


The 4th argument corresponds to a combination of the stages to build + the [[#Choosing a Target|target spec]] for your stage tarball.
The 4th argument corresponds to a combination of the [[#Stages to Build|stages to build]] + the [[#Choosing a Target|target specs]] for your stage tarball.


== Checking the logs ==
== Checking the logs ==
{{c|ezbuild.sh}} is very quiet. If you were expecting it to give a lot of output like a usual {{c|emerge}} session, it may look like your computer froze. You can check what {{c|ezbuild.sh}} is doing by watching the logs, which can be found in a path with the following structure: {{f|/home/mirror/funtoo/<release>/<arch>/<subarch>/<date>/log/<stage>-<target>.txt}}.
 
The {{c|ezbuild.sh}} script is very quiet. If you were expecting to get a lot of output like a usual {{c|emerge}} session, it may look like your computer froze. You can check what {{c|ezbuild.sh}} is doing by watching the logs, which can be found in a path with the following structure: {{f|/home/mirror/funtoo/<release>/<arch>/<subarch>/<date>/log/<target>.txt}}.


{{console|body=
{{console|body=
%fchroot% ##i##tail -f /home/mirror/funtoo/next/x86-64bit/intel64-skylake/2022-10-08/log/stage3-freshen.txt
# ##i##tail -f /home/mirror/funtoo/next/x86-64bit/generic_64/2022-10-08/log/stage3-freshen.txt
}}
}}


Under the same directory, you will find a log file for every spec file involved in the build you chose.  In the case of the example above, we had chose “freshen+gnome”, so we can expect to find {{f|stage3-freshen.txt}} and {{f|gnome.txt}}.
Under the same directory, you will find a log file for every spec file involved in the build you chose.  In the case of the example above, we had chosen “freshen+gnome”, so we can expect to find {{f|stage3-freshen.txt}} and {{f|gnome.txt}}.


If you'd like to know all the targets that were selected for your build, check the file {{c|.targets}} at (in our example):
If you'd like to know all the targets that were selected for your build, check the file {{c|.targets}} at (in our example):


{{console|body=
{{console|body=
%fchroot% ##i##cat /home/mirror/funtoo/next/x86-64bit/intel64-skylake/2022-10-08/.targets
# ##i##cat /home/mirror/funtoo/next/x86-64bit/generic_64/2022-10-08/.targets
}}
}}


Line 237: Line 218:
=== Stages to Build ===
=== Stages to Build ===


There are 2 options for this argument: 'freshen' and 'full'.  
There are 2 options for this argument: “freshen” and “full”.  


“Freshen” will basically run a @world update on an existing stage3 tarball to generate a ''fresh'', updated version of the same tarball.
“Freshen” will basically run a @world update on an existing stage3 tarball to generate a ''fresh'', updated version of the same tarball.


“Full” will build a stage3 from scratch, starting by building a stage1, then a stage2 and finally, from that, a fully new stage3 tarball, completely built from sources.
“Full” will build a stage3 from scratch, starting by building a stage1, then a stage2 and finally, from that, an entirely new stage3 tarball, completely built from source.
 


=== Build Targets ===
=== Build Targets ===


You can create different flavors of stage3, with the software and settings necessary for different purposes.  For example, a Gnome Desktop stage3 tarball, an LXD container image, an OpenVZ container image, etc. You can find the available targets at {{f|/root/metro/targets/gentoo}}. You can also create your custom targets.  See [[Funtoo:Metro/Data Model|Metro Data Model]] to learn how to do that.
You can create different flavors of a stage3, with the software and settings necessary for different purposes.  For example, a GNOME Desktop stage3 tarball, an LXD container image, etc. The available targets can be found at {{f|/root/metro/targets/gentoo}}. You can also create your own custom targets.  See [[Funtoo:Metro/Data Model|Metro Data Model]] to learn how to do that.


== Using Gnu Screen ==
== Using Gnu Screen ==
Line 263: Line 243:
}}
}}


This will open a screen session, where you can run {{c|ezbuild.sh}} normally:
This will open a screen session where you can run {{c|ezbuild.sh}}:


{{console|body=
{{console|body=
# ##i##/home/root/metro/scripts/ezbuild.sh next x86-64bit intel64-ivybridge freshen+gnome
# ##i##/home/root/metro/scripts/ezbuild.sh next x86-64bit generic_64 freshen+gnome
}}
}}


When you want to leave the terminal, just press Ctrl+A and then Ctrl+D to detach the screen session. Once you've detached, you are free to leave you ssh session and/or close your terminal.  The script will keep running inside.
Now, if you'd like to leave the terminal, just press Ctrl+A and then Ctrl+D to detach the screen session. Once you've detached, you are free to leave you ssh session and/or close your terminal.  The script will keep running inside the detached session.


When you want to go back, just restore your session:
When you want to go back, log back in if you are working from a remote host and just restore your session:
{{console|body=
{{console|body=
# ##i##screen -T ${TERM} -r Metro
# ##i##screen -T ${TERM} -r Metro
Line 278: Line 258:
== Where is my Stage Tarball? ==
== Where is my Stage Tarball? ==


When the build completes, the stage tarball can be found in a path with the following structure: {{f|/home/mirror/funtoo/<release>/<arch>/<subarch>/<date>/}}. In our example, it will be found at:
When the build completes, by default the stage tarball can be found in a path with the following structure: {{f|/home/mirror/funtoo/<release>/<arch>/<subarch>/<date>/}}. In our example, it will be found at:
{{console|body=
{{console|body=
%fchroot% ##i##ls /home/mirror/funtoo/next/x86-64bit/intel64-skylake/2022-10-08/
# ##i##ls /home/mirror/funtoo/next/x86-64bit/generic_64/2022-10-08/
}}
}}
If you'd like your tarballs to go elsewhere, you can change your configuration in {{f|/root/.metro}} (see [[Funtoo:Metro/Configuring Metro|Configuring Metro]]).


== Where to Go From Here ==
== Where to Go From Here ==
=== Additional Architectures ===
=== Additional Architectures ===
The automatic setup script doesn't offer all the possible architectures you could be building a stage3 tarball for. Read the instructions on [[Funtoo:Metro/Manual_Setup|Manual Setup]] to learn how to set up a build for any of the supported platforms.  In theory, you can actually set up Metro to build for any platform supported by the GCC (and QEMU, if it's the target platform is different from the host platform).
The automatic setup script doesn't offer all the possible architectures you could be building a stage tarball for. Read the instructions on [[Funtoo:Metro/Manual_Setup|Manual Setup]] to learn how to set up a build for any of the supported platforms.  In theory, you can actually set up Metro to build a stage tarball for any platform supported by the GCC (and QEMU, if it's the target platform is different from the host platform).


=== Additional Targets ===
=== Custom Targets ===
Study the [[https://www.funtoo.org/Funtoo:Metro/Data_Model]Metro's Data Model]] to learn how to create new targets, which you can then use for your builds.
Study [[Funtoo:Metro/Data_Model|Metro Data Model]] to learn how to create new custom targets, which you can then use for your own customized builds.


=== Automation (Buildbots) ===
=== Automation (Buildbots) ===

Latest revision as of 19:26, March 26, 2024

This page will walk you through setting up metro for the first time.

Cloning and configuring Metro

Metro is run from its own git tree, and does not have its own ebuild. You can get the latest version of Metro from the git repository using git. 

root # cd /root
root # git clone https://code.funtoo.org/bitbucket/scm/core/metro.git

Installing dependencies

Because the git repo is cloned directly, you will need to install some Python modules used by the scripts. Please make sure you have the following packages installed in your system: 

root # emerge -av dev-python/lxml dev-python/requests
   Note

metro is running as root and while not strictly necessary but best practice would be using dedicated environment such as LXD container or similar where you will run your builds.

With this setup, before installing dependencies of metro, run ego sync in your container.

Configuring Metro

The default options for metro are usually fine for most cases. If you are happy with the defaults, just copy the default configuration file to /root/.metro: 

root # cp /root/metro/metro.conf /root/.metro

Two things to note -- the /root/.metro file specifies where the metro git repository is installed -- and this must match where you put it on your system. If you are not using the location of /root/metro, then you will need to fix [section path] / install to reflect this.

Also, metro will set up what is called a "mirror" -- this is an organized repository of stages that metro manages, and it uses the directory structure you will find at https://build.funtoo.org. By default, the path /home/mirror/funtoo is used as the base of this repository. This path is also defined in .metro and should be changed if you are using the non-default location.

If you wish to further tweak the settings then you should edit .metro accordingly (see Configuring_Metro) to learn how to do that.

Now your system is ready to run Metro's automatic setup tool, which will take care of the rest of the preparation.

Setting up your build

The Python modules you installed earlier allows setup to run, which generally will take care of everything else. When you run setup, the following tasks will be performed:

  1. Independent ego cloned to /root/ego (which is used by metro to create snapshots);
  2. If Package:fchroot is not installed, it will be emerged;
  3. A "seed" stage3 will be downloaded so that you can use it to build a new stage3;
  4. The "mirror" repository will be set up to build an up-to-date version of this stage3.

These steps are done automatically by the setup script, which only needs to be run once.

When this is done, you will be able to use metro to perform a build on your system. Our simplified setup script will get you up and running with a basic metro configuration which we recommend for new users. Specifically, it will allow you to take one of our official Funtoo stage3's of a particular arch and subarch, and build an updated version of the same arch and subarch. If you want to set up another arch and subarch to build locally, it is safe to run setup a second time.

Let's launch setup: 

root # /root/metro/scripts/setup

Selecting a release

You can build a stage tarball for any of the available Funtoo releases. Currently, these are the only releases available: 

www.funtoo.org / funtoo

   1. 1.4-release-std
   2. next




















.

Selecting an Architecture

Choose a general architecture from the menu. You'll have a chance to choose a more specific sub-architecture in the next step. 

www.funtoo.org / funtoo / next


   1. arm-64bit
   2. riscv-64bit
   3. x86-64bit




















.

Selecting a Sub-Architecture

Choose the specific sub-architecture you wish to build your stage tarball for. 

www.funtoo.org / funtoo / next / x86-64bit

   1. amd64-bulldozer
   2. amd64-excavator
   3. amd64-k10
   4. amd64-piledriver
   5. amd64-steamroller
   6. amd64-zen
   7. amd64-zen2
   8. amd64-zen3
   9. core2_64
  10. generic_64
  11. intel64-broadwell
  12. intel64-haswell
  13. intel64-ivybridge
  14. intel64-nehalem
  15. intel64-sandybridge
  16. intel64-silvermont
  17. intel64-skylake
  18. intel64-westmere


.

Note that thanks to Package:fchroot, you will be able to update an arm-64bit stage on an x86-64bit system if you want.

   Important

More advanced uses of Metro allow for a new subarch to be "bootstrapped" from an existing subarch, but that is not provided as an option as it's a more sophisticated use of the tool and not ideal for your initial local build. Let's keep things simple to get started :)

Wait for the Setup to Complete

The setup script will go through several steps to set up your build. If you are running it for the first time, this can include installing supporting software and downloading a tarball, so it may take some time to complete.

Here is a sample output: 

Created file /home/mirror/funtoo/next/x86-64bit/generic_64/.control/strategy/build with contents 'local'
Created file /home/mirror/funtoo/next/x86-64bit/generic_64/.control/strategy/seed with contents 'stage3'
Created file /home/mirror/funtoo/next/x86-64bit/generic_64/.control/version/stage3 with contents '2022-09-13'
--2022-10-09 08:06:24--  https://build.funtoo.org/next/x86-64bit/generic_64/2022-09-13/stage3-generic_64-next-2022-09-13.tar.xz
Resolving build.funtoo.org... 89.187.187.14, 89.187.187.12, 89.187.187.19, ...
Connecting to build.funtoo.org[89.187.187.14]:443... connected.
 
HTTP request sent, awaiting response... 200 OK
Length: 701542432 (669M) [application/octet-stream]
Saving to: ‘/home/mirror/funtoo/next/x86-64bit/generic_64/2022-09-13/stage3-generic_64-next-2022-09-13.tar.xz’
 
funtoo/next/x86-64bit/g  100%[==================================================>] 669.04M  95.5MB/s    in 7.3s
 
2022-10-09 08:06:32 (92.0 MB/s) - ‘/home/mirror/funtoo/next/x86-64bit/generic_64/2022-09-13/stage3-generic_64-next-2022-09-13.tar.xz’ saved [701542432/701542432]
 
Cloning into '/root/ego'...
remote: Enumerating objects: 3385, done.
remote: Counting objects: 100% (3385/3385), done.
remote: Compressing objects: 100% (1382/1382), done.
remote: Total 3385 (delta 2093), reused 2902 (delta 1727), pack-reused 0
Receiving objects: 100% (3385/3385), 760.96 KiB [ 27.18 MiB/s, done.
Resolving deltas: 100% (2093/2093), done.
 
Metro build for release next, x86-64bit, generic_64 has been initialized.
To build a new release, use ezbuild (or set up buildbot):
 
scripts/ezbuild.sh next x86-64bit generic_64 freshen+gnome

Building a new release

In the example above, a "next x86-64bit generic_64" build has been set up to build a new Gnome stage3 tarball after updating the existing stage3 tarball downloaded from https://build.funtoo.org. If you're satisfied with those settings, you can just go ahead and run the command as suggested: 

root # /root/metro/scripts/ezbuild.sh next x86-64bit generic_64 freshen+gnome

Otherwise, continue reading to learn how to create a stage3 tarball with different specs.

The first 3 arguments in the example above: 'next', 'x86-64bit' and 'generic_64' correspond to the options you chose when you ran the setup script. If you'd like to run ezbuild.sh for a different release, architecture or sub-architecture, you need to run the setup script again with the appropriate options. You only need to do this once per subarch -- just to make sure you have a local copy of the stage3 for that subarch. After that, ezbuild.sh can keep the stage3 updated using the most recent successfully-built stage3.

The 4th argument corresponds to a combination of the stages to build + the target specs for your stage tarball.

Checking the logs

The ezbuild.sh script is very quiet. If you were expecting to get a lot of output like a usual emerge session, it may look like your computer froze. You can check what ezbuild.sh is doing by watching the logs, which can be found in a path with the following structure: /home/mirror/funtoo/<release>/<arch>/<subarch>/<date>/log/<target>.txt. 

root # tail -f /home/mirror/funtoo/next/x86-64bit/generic_64/2022-10-08/log/stage3-freshen.txt

Under the same directory, you will find a log file for every spec file involved in the build you chose. In the case of the example above, we had chosen “freshen+gnome”, so we can expect to find stage3-freshen.txt and gnome.txt.

If you'd like to know all the targets that were selected for your build, check the file .targets at (in our example): 

root # cat /home/mirror/funtoo/next/x86-64bit/generic_64/2022-10-08/.targets

Choosing a Target

Stages to Build

There are 2 options for this argument: “freshen” and “full”.

“Freshen” will basically run a @world update on an existing stage3 tarball to generate a fresh, updated version of the same tarball.

“Full” will build a stage3 from scratch, starting by building a stage1, then a stage2 and finally, from that, an entirely new stage3 tarball, completely built from source.

Build Targets

You can create different flavors of a stage3, with the software and settings necessary for different purposes. For example, a GNOME Desktop stage3 tarball, an LXD container image, etc. The available targets can be found at /root/metro/targets/gentoo. You can also create your own custom targets. See Metro Data Model to learn how to do that.

Using Gnu Screen

Depending on the arguments you passed to ezbuild.sh, the build process may take several hours to complete.

If you are running ezbuild.sh from another machine through an ssh session, you might want to use a terminal multiplexer like app-misc/tmux or app-misc/screen, which will allow you to close the terminal and even log out from the remote machine machine. Here is how you can do it using Gnu Screen:

Emerging app-misc/screen: 

root # emerge -av app-misc/screen

Running app-misc/screen: 

root # screen -T ${TERM} -S Metro

This will open a screen session where you can run ezbuild.sh: 

root # /home/root/metro/scripts/ezbuild.sh next x86-64bit generic_64 freshen+gnome

Now, if you'd like to leave the terminal, just press Ctrl+A and then Ctrl+D to detach the screen session. Once you've detached, you are free to leave you ssh session and/or close your terminal. The script will keep running inside the detached session.

When you want to go back, log back in if you are working from a remote host and just restore your session: 

root # screen -T ${TERM} -r Metro

Where is my Stage Tarball?

When the build completes, by default the stage tarball can be found in a path with the following structure: /home/mirror/funtoo/<release>/<arch>/<subarch>/<date>/. In our example, it will be found at: 

root # ls /home/mirror/funtoo/next/x86-64bit/generic_64/2022-10-08/

If you'd like your tarballs to go elsewhere, you can change your configuration in /root/.metro (see Configuring Metro).

Where to Go From Here

Additional Architectures

The automatic setup script doesn't offer all the possible architectures you could be building a stage tarball for. Read the instructions on Manual Setup to learn how to set up a build for any of the supported platforms. In theory, you can actually set up Metro to build a stage tarball for any platform supported by the GCC (and QEMU, if it's the target platform is different from the host platform).

Custom Targets

Study Metro Data Model to learn how to create new custom targets, which you can then use for your own customized builds.

Automation (Buildbots)

You can set up multiple builds and have Metro automatically build each one of them or just refresh the ones that are outdated. Read the instructions at Automation to learn how to do that.

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