path: root/docs/manual.tex

\input texinfo
@setfilename dscip.info
@settitle Dead Simple Continuous Integration POSIX

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@contents

@node Top
@top Dead Simple Continuous Integration POSIX Manual

This is the manual for the Dead Simple Continuous Integration POSIX program.

@verbatim
Dead Simple Continuous Integration POSIX Manual by Charadon
(DSCIP Manual for short.)

To the extent possible under law, the person who associated CC0 with
DSCIP Manual has waived all copyright and related or neighboring rights
to DSCIP Manual.

You should have received a copy of the CC0 legalcode along with this
work.  If not, see:
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@url{https://creativecommons.org/publicdomain/zero/1.0/}.

@menu
* Installing::
* Using::
* Quirks::

* Manual's License::
* Index::
@end menu

@node Installing
@chapter Installing
@cindex Installing
	Details on installing DSCIP onto various systems.
	@node Downloading
	@section Downloading
	@cindex Downloading
		Currently, the upstream repo for DSCIP is located at this
		@url{https://www.opencode.net/charadon/dscip, Git Repo}. If your OS
		doesn't have DSCIP packaged, you can download the @command{setup.sh}
		from the releases page, and use that to install dscip. Alternatively,
		you can clone the git repo into whatever directory you want.
	@node Unix
	@section Unix
		@cindex Installing on Unix
		In this section, Unix refers to systems that are similar in nature to the
		old System V Unix or is POSIX in nature. This would include: Linux, BSD,
		Mac, Haiku, and Illumos.@*@*
		The instructions will pretty much be the same for all systems.

		@node As a Package
		@subsection As a Package
		@cindex Unix: Installing Packaged DSCIP
			If your host OS packaged DSCIP correctly according to 
			Packaging (@xref{Packaging}), these instructions should work.

			@enumerate
			@item
			Run @command{setup-dscip} in the terminal. See @command{setup-dscip
			-h} for more details.
			@item
			Add the new script as a cronjob or daemon. See your OS's
			manual for instructions on how to do so.
			@end enumerate
			
			And that's it! You're ready to go!

		@node Manually
		@subsection Manually
		@cindex Unix: Install Manually
			While not as simple as if it was packaged. The process is still not
			that hard.
			@enumerate
			@item
			Run @command{setup.sh}. See @command{setup.sh -h} for more
			details.
			@item
			Add the new script as a cronjob or daemon. See your OS's manual
			for instructions on how to do so.
			@end enumerate
			And that's it! You're ready to go!

	@node Windows
	@section Windows
	@cindex Installing on Windows
		Windows is a different beast from Unix. So it warrants it's own dedicated
		section.
		@node MSYS2 (Recommended)
		@subsection MSYS2 (Recommended)
		@cindex Windows: Installing on MSYS2
			@enumerate
			@item
			Install @url{https://www.msys2.org, MSYS2} in whatever way you want. I recommend using
			@url{https://scoop.sh, Scoop}.
			@item
			Once MSYS2 is installed, run setup.sh (@command{setup.sh -h} for
			more info.).
			@item
			Now we'll need a way to run it regularly. I recommend using the Task Scheduler
			that comes with Windows. Here's a step-by-step guide: @xref{Task Scheduler}
			@end enumerate
	
		@node Only Bash
		@subsection Bash
		@cindex Windows: Installing with only Bash
			The easiest way to get Bash on Windows is to install git, so we'll
			be assuming that path.
			@enumerate
			@item
			Install @url{https://gitforwindows.org/, Git for Windows}, I recommend using @url{https://scoop.sh,
			Scoop}.
			@item
			Once Git is installed, you should be able to run @command{bash} from
			the command prompt or powershell. Once in Bash, run setup.sh
			(@command{setup.sh -h} for more info.) and install dscip.
			@item
			Now we'll need a way to run it regularly. I recommend using Task Scheduler
			that comes with Windows. Here's a step-by-step guide: @xref{Task Scheduler}
			@end enumerate
		@node Task Scheduler
		@subsection Using Task Scheduler
		@cindex Windows: Using Task Scheduler
			Once you have DSCIP installed, you'll need to have it run on a regular basis.
			For this, Windows has the Task Scheduler. Using it is very simple, and i'll go
			over a basic set up with it. Also, you should always use an unpriviledged user.
			@enumerate
			@item
			Create a batch/powershell script that runs bash on the DSCIP script. This script should
			be located somewhere that the unpriviledged user can run it.@*
			Here is an a batch example:@*
			@example
set MSYSTEM=MINGW64 :: If you're using MSYS2
C:\Users\Build\scoop\apps\msys2\current\usr\bin\bash -l -c "/home/Build/project/dscip"
			@end example
			@item
			Log in as an Administrator user and open Task Scheduler by press Win+R, and typing taskschd.msc into the Run Dialog.
			@item
			Right click on @command{Task Scheduler Library} and click @command{Create Task}
			@item
			Under Security Options, change the User to an unpriviledged user, and set to 'Run whether user is logged on or not.'
			@item
			Go to 'Triggers' and click the 'New...' button. A new window will pop up with options
			to schedule when the task will execute. First thing you should do is click the 'Begin the Task'
			drop-down menu and select 'At startup', this will ensure that the task will run with every reboot.
			As for schedule settings, I recommend going down to advanced and checking the box 'Repeat task every:' and 
			putting in '1 minute' into the box, and then selecting 'Indenfinitely' in the 'for a duration of' box.
			Now click the 'OK' button to save your settings.
			@item
			Go to the 'Actions' tab and click the 'New...' button at the bottom. In the 'New Action' dialog that will pop up,
			select the Batch/Powershell script you made earlier. There's no need to select a 'Start In' location, as the script
			by default tries to change directory into the directory where the script is stored at.
			@item
			From here, you can configure any options you want, but if you have no further configuration needs, click the 'Ok' button
			to close out of the 'Create Task' window. Now just reboot the machine.
			@end enumerate
			@noindent
			And that should be it, it will now run DSCIP every minute.
	
	@node Packaging
	@section Packaging
	@cindex Packaging
		Packaging is pretty easy, just run @command{make install} and it'll do
		everything for you. You can use environment variables to change where
		certain things go though.
		@enumerate
		@item
		@env{PREFIX}: This specifies where on the system everything will go. By
		default it's /usr/local.
		@item
		@env{BINDIR}: The directory to install setup.sh to. When installed, it
		will change it's name to @command{setup-dscip}.
		@item
		@env{INFODIR}: The directory to install the manual. Default is
		@env{PREFIX}/share/info.
		@end enumerate
		@noindent
		This is the general layout that the Makefile defaults to:
		@example
.
|-- bin
|   `-- setup-dscip (setup.sh)
`-- share
    |-- charadon
    |   `-- dscip
    |       |-- build.sh
    |       |-- config.sh
    |       |-- dscip
    |       |-- failed.sh
    |       |-- post.sh
    |       `-- pre.sh
    `-- info
        `-- dscip.info.gz
		@end example
		@*
		@noindent
		You'll note two things:
		@enumerate
		@item
		@command{update.sh} is not included. This is mainly mean't for non-package
		installs. Such as direct @command{git} clones, or using the
		@command{setup.sh} script on it's own.
		@item
		@env{SCRIPT_DIR} cannot be changed from it's default of
		$PREFIX/share/charadon/dscip. This is because the @command{setup.sh}
		script relies on the scripts being there to symlink to them.
		@end enumerate

	@node Using Templates
	@section Using Templates
	@cindex Using Templates
		Templates are an easy way to quickly get a DSCIP instance up and
		running. Since most developers tend to have all their projects build
		almost the exact same way, you can easily create a git repo with your DSCIP
		scripts and have the setup script copy them over. You can point to the
		directory containing your templates by using the @option{-t} argument with
		setup.sh. You find find an example of templates here at my
		@url{https://www.opencode.net/charadon/my-dscip-templates-v1, Git Repo}
		
	

@node Using
@chapter Using
@cindex Using
	This chapter goes over how to actually use DSCIP.
	@node Scripts
	@section Scripts
	@cindex Using: Scripts
		This section covers all the scripts in DSCIP, what they do, and with
		examples.
		@node config_dot_sh
		@subsection config.sh
		@cindex Scripts: config.sh
			@command{config.sh} is where all the variables for dscip are stored.
			Any variable in here can be used in any other script. See
			@xref{Basic Variables}.@*Example:
			@example
#!/bin/sh
# Variables that control the program. #
# GIT Repo #
export DSCIP_GITREPO="https://www.example.com/example/example.git"
export DSCIP_NAME="Example"
# GIT MODE:                                                   #
# pull: Doesn't delete previous clone and just pulls changes. #
# clone: Deletes previous clone, and creates a fresh clone.   #
export DSCIP_GITMODE="clone"
# Branch to check #
export DSCIP_BRANCH="master"
# The directory where all the scripts are. By default tries to detect where    #
# automatically.                                                               #
WORKING_DIRECTORY="$(pwd -P)"
export WORKING_DIRECTORY
# Commands to run before building. #
export DSCIP_PRE_CMD="$WORKING_DIRECTORY/pre.sh"
# Commands to run to build program. #
export DSCIP_BUILD_CMD="$WORKING_DIRECTORY/build.sh"
# Commands to run after building has succeeded. #
export DSCIP_POST_CMD="$WORKING_DIRECTORY/post.sh"
# Commands to run after building has failed.
export DSCIP_FAILED_CMD="$WORKING_DIRECTORY/failed.sh"
# Daemon mode options #
export DSCIP_DAEMON="false" # If daemon mode should be enabled or not. #
export DSCIP_DAEMON_FORK="true" # If the daemon should run in the background. #
export DSCIP_SLEEP="60" # How many seconds before the daemon re-runs itself. #
# etc #
export DSCIP_DISREGARD_COMMIT_CHECK="false" # If the script should just rebuild even #
# if upstream has not updated. #
export DSCIP_OUTPUT_TO="$WORKING_DIRECTORY/output.txt" # Output to file, default is output.txt
# Automatically update DSCIP?
export DSCIP_AUTO_UPDATE="false"
			@end example
		@node setup_dot_sh
		@subsection setup.sh
		@cindex Scripts: setup.sh
			This script will handle the downloading, installing/symlinking, and
			configuration of a DSCIP instance. It has two modes of operation:
			@enumerate
			@item
				Interactive Mode: If no argument is supplied, it will ask the
				user questions on how it wants to set up the dscip instance.
			@item
				Non-interactive Mode: If arguments are supplied, it will use
				those arguments to create a DSCIP instance.
			@end enumerate
			@noindent @*
			See @command{setup.sh -h} for
			more info. This script can also go by the name @command{setup-dscip}
			if it's packaged.@*@* Example:
		@example
./setup.sh -n "Pong-C" -d /home/builder/Pong-C -u "https://opencode.net/charadon/pong-c" -b master -t /home/builder/templates
		@end example
		@node update_dot_sh
		@subsection update.sh
		@cindex Scripts: update.sh
			This script updates the @command{dscip} script. It shouldn't be
			present if packaged for a system. It's only useful manual
			installations.
		@node pre_dot_sh
		@subsection pre.sh
		@cindex Scripts: pre.sh
			This script contains the commands to run *before* the build
			commands. This script can do things such as:
			@enumerate
			@item
				Update the System.
			@item
				Grab assets from a remote URL not part of the git repo.
			@item
				Probe to see if certain services are up and running. Such as a
				FTP server to upload artifacts to.
			@end enumerate
			@*
			@noindent
			If this script doesn't exit with 0, then DSCIP aborts. Another thing
			to note, is that DSCIP will run whatever the shebang is, so this script can be
			made in other languages, such as Perl, Python, Powershell, Batch, C Shell, etc.@*@*Example:
			@example
#!/bin/sh
set -eu

# Execute commands before building.                                            
# Below is an example.                                                         

# Build user implied to have sudo access to apt update and upgrade             
sudo apt update -y
sudo apt upgrade -y

# Including assets with game code is usually a bad idea, so we grab the assets 
# from a mirror.                                                               
wget https://www.example.com/project/game_assets.zip
unzip game_assets.zip

exit 0
			@end example
		@node build_dot_sh
		@subsection build.sh
		@cindex Scripts: build.sh
			This script contains the build commands for your project. If the
			script doesn't return 0, it will run @xref{failed_dot_sh,
			@command{failed.sh}}, otherwise, it will run
			@xref{post_dot_sh,@command{post.sh}}.@*Example:@*
			@example

#!/bin/sh

set -eu

# Insert build commands in here. #
# If you're feeling particular paranoid, you can make it chroot here. #

./configure
make -j4
make DESTDIR=app install

exit 0
			@end example
		@node failed_dot_sh
		@subsection failed.sh
		@cindex Scripts: failed.sh
			This script tells DSCIP what to do if the build failed. Like pre.sh,
			it must return 0 or else DSCIP will abort. @*Example:@*
			@example
#!/bin/sh

set -eu

# This script determines what to do if the build failed.
# Below is an example of uploading the output.txt to an ftp server.
ftp -in <<EOF
open 192.168.1.5
user username password
mkdir $DSCIP_NAME
cd $DSCIP_NAME
mkdir $CURRENT_COMMIT
cd $CURRENT_COMMIT
mkdir $(uname)
cd $(uname)
put $WORKING_DIRECTORY/output.txt output-failed.txt
close
bye
EOF
			@end example
		@node post_dot_sh
		@subsection post.sh
		@cindex Scripts: post.sh
			This script tells DSCIP what to do if the build succeeded. Like
			pre.sh, it must return 0 or else DSCIP will abort. @*Example:@*
			@example
#!/bin/sh

set -eu

# Execute commands after building. Like pushing to an FTP server.              #
# Example below. #

# TAR up the program.                                                          #
bsdtar -a -cf \
$DSCIP_NAME-$(uname)-$(uname -r)_$(uname -m)-$CURRENT_COMMIT.tar.xz app/

# Send the artifacts to an FTP server.                                         #
ftp -in <<EOF
open 192.168.255.255
user username pAssw0rd
mkdir $DSCIP_NAME
cd $DSCIP_NAME
mkdir $CURRENT_COMMIT
cd $CURRENT_COMMIT
mkdir $(uname)
cd $(uname)
put $DSCIP_NAME-$(uname)-$(uname -r)_$(uname -m)-$CURRENT_COMMIT.tar.xz
put $WORKING_DIRECTORY/output.txt output-success.txt
close
bye
EOF

exit 0
			@end example
	@node Basic Variables
	@section Basic Variables
	@cindex Basic Variables
		This section goes over variables that you can safely modify in
		config.sh and/or use in your scripts.
		@subsection DSCIP_GITREPO
		@cindex Basic Variables: DSCIP_GITREPO
			This is the variable that determines what git repo DSCIP clones into
			wrkdir. It should be noted that this isn't limited to a remote URL.
			It can also clone from a local system git repo. This can be useful
			if you want to forbid internet access to the builder user.
		@subsection DSCIP_NAME
		@cindex Basic Variables: DSCIP_NAME
			This variable determines the name of the program that's being build.
			Mostly for use with the @command{post.sh} and @command{failed.sh}
			scripts when publishing artifacts.
		@subsection DSCIP_BRANCH
		@cindex Basic Variables: DSCIP_BRANCH
			This variable tells DSCIP which branch to clone. This is useful if
			you	develop in a branch other than master.
		@subsection DSCIP_DAEMON
		@cindex Basic Variables: DSCIP_DAEMON
			This variable will tell DSCIP to not close, but rather stay open and
			just sleep before re-running itself. Useful for Windows, if you
			want DSCIP to run in shorter time periods than 60 seconds, or use
			special features that your OS's init system gives.
		@subsection DSCIP_DAEMON_FORK
		@cindex Basic Variables: DSCIP_DAEMON_FORK
			This variable tells DSCIP if it should run itself in the background.
			Some init systems prefer one or the other, so consult your OS's
			documentation.
		@subsection DSCIP_SLEEP
		@cindex Basic Variables: DSCIP_SLEEP
			When in daemon mode, this controls how long DSCIP should wait
			between attempted builds before checking for a new commit and
			building if one exists.
		@subsection DSCIP_OUTPUT_TO
		@cindex Basic Variables: DSCIP_OUTPUT_TO
			This variable tells DSCIP where to put logs. By default it puts all
			output into output.txt. This is useful if, for example, you're
			running DSCIP in daemon mode, and need to store logs somewhere else.
		@subsection DSCIP_DATE_FORMAT
		@cindex Basic Variables: DSCIP_DATE_FORMAT
			This variable tells DSCIP how it should format @env{COMMIT_DATE}. See
			@command{strftime(3)} for more information of time codes.
		@subsection LAST_COMMIT
		@cindex Basic Variables: LAST_COMMIT
			This variable tells DSCIP what the last commit was. This variable
			should be treated as *readonly* and should never be modified.
		@subsection CURRENT_COMMIT
		@cindex Basic Variables: CURRENT_COMMIT
			This variable tells DSCIP what commit it's currently building. This
			variable like LAST_COMMIT should be treated as *readonly* and should
			never be modified.
		@subsection COMMIT_DATE
		@cindex Basic Variables: COMMIT_DATE
			This variable is the date that the commit was created on. This can
			be used in your post scripts to organize artifacts if you wish. This
			string is formatted with @env{DSCIP_DATE_FORMAT} above.
	@node Advanced Variables
	@section Advanced Variables
	@cindex Advanced Variables
		These are variables you should only change if you absolutely need to!
		@subsection DSCIP_GITMODE
		@cindex Advanced Variables: DSCIP_GITMODE
			This tells DSCIP to, rather than delete the wrkdir and get a fresh
			clone, to just pull changes. This is really only useful in
			situations where you have limited bandwidth.
		@subsection WORKING_DIRECTORY
		@cindex Advanced Variables: WORKING_DIRECTORY
			This should probably never be changed. The only situation that
			*might* warrant changing it, is in a very restricted environment
			where it *has* to run in a specific place.
		@subsection DSCIP_@{PRE,BUILD,POST,FAILED@}_CMD
		@cindex Advanced Variables: DSCIP_@{PRE,BUILD,POST,FAILED@}_CMD
			These variables tell DSCIP where to find their respective scripts. Like
			WORKING_DIRECTORY, this really shouldn't be changed and is really
			only useful in situations that are very restrictive.
		@subsection DSCIP_DISREGARD_COMMIT_CHECK
		@cindex Advanced Variables: DSCIP_DISREGARD_COMMIT_CHECK
			This variable tells DSCIP to ignore the commit check and just keep
			rebuilding. This is useful for seeing if old/unmaintained software
			will still build on modern systems. But other than that, should be
			left off.
		@subsection DSCIP_AUTO_UPDATE
		@cindex Advanced Variables: DSCIP_AUTO_UPDATE
			This variable tells DSCIP to run @command{update.sh}, and then run a
			checksum on itself. If it's different from when it first launched,
			It'll re-run itself. This is useful for manual installations.

@node Quirks
@chapter Quirks
@cindex Quirks
	This chapter goes over various quirks that have been discovered with DSCIP.
	None so far...

@node Manual's License
@chapter Manual's License
@cindex Manual's License
	@insertcopying

	

@node Index
@unnumbered Index
@printindex cp

@bye