### MacroList Macro Examples

Source: https://herwig.hepforge.org/trac/wiki/WikiMacros

Illustrates how to use the MacroList macro to get a list of available macros. A wildcard shows all, while appending '?' or passing a macro name provides specific help.

```wiki
[[MacroList(*)]]
```

```wiki
[[?]]
```

```wiki
[[MacroList(MacroList)]]
```

```wiki
[[MacroList?]]
```

--------------------------------

### Download and Install VBFNLO

Source: https://herwig.hepforge.org/tutorials/installation/prerequisite.html

Download, extract, configure, and install the VBFNLO program. Ensure you have the necessary build tools and specify the installation directory.

```bash
wget "http://www.itp.kit.edu/~vbfnloweb/archive/vbfnlo-3.0.0beta3.tgz"
tar xzf vbfnlo-3.0.0beta3.tgz
cd VBFNLO-3.0.0beta3
./configure --prefix=$INSTALL_LOC
make -s -j$(nproc)
make -s install
```

--------------------------------

### Setup GoSam Environment

Source: https://herwig.hepforge.org/tutorials/gettingstarted/extmatrix.html

Source the GoSam setup script to ensure environment variables are correctly configured before proceeding with simulations.

```bash
source gosam_setup_env.sh
```

--------------------------------

### Install with Pre-installed Packages

Source: https://herwig.hepforge.org/tutorials/installation/bootstrap.html

Use --without-<PACKAGE> to skip a package and --<PACKAGE>-location to specify its path if already installed.

```bash
./herwig-bootstrap -j 4 --without-boost --boost-location=where/boost/is --without-vbfnlo ${HERWIGPATH}
```

--------------------------------

### Install LHAPDF

Source: https://herwig.hepforge.org/tutorials/installation/prerequisite.html

Download, configure, build, and install LHAPDF. Ensure you have Boost installed and specify the installation prefix.

```bash
cd /where/to/build/lhapdf

wget "https://lhapdf.hepforge.org/downloads/LHAPDF-6.1.6.tar.gz"
tar -xvf LHAPDF-6.1.6.tar.gz
cd LHAPDF-6.1.6
./configure --prefix=$INSTALL_LOC --with-boost=$INSTALL_LOC
make -j$(nproc)
make check
make install
```

--------------------------------

### SMTP Notification Configuration Example

Source: https://herwig.hepforge.org/trac/wiki/TracNotification

Example configuration for enabling and setting up SMTP for email notifications. Ensure at least smtp_from or smtp_replyto is set.

```ini
[notification]
smtp_enabled = true
smtp_server = mail.example.com
smtp_from = notifier@example.com
smtp_replyto = myproj@projects.example.com
smtp_always_cc = ticketmaster@example.com, theboss+myproj@example.com

```

--------------------------------

### Install FastJet Package

Source: https://herwig.hepforge.org/tutorials/installation/prerequisite.html

Download, extract, configure, and install the FastJet package, enabling all plugins. Set the installation prefix to INSTALL_LOC.

```bash
cd /where/to/build/fastjet
wget http://fastjet.fr/repo/fastjet-3.2.1.tar.gz
tar -xvf fastjet-3.2.1.tar.gz
cd fastjet-3.2.1
./configure --prefix=$INSTALL_LOC --enable-allplugins
make -j$(nproc)
make check
make install

```

--------------------------------

### Install GSL Scientific Library

Source: https://herwig.hepforge.org/tutorials/installation/prerequisite.html

Download, extract, configure, and install the Gnu Scientific Library (GSL). Set the installation prefix to INSTALL_LOC.

```bash
cd /where/to/build/gsl
wget "http://ftp.heanet.ie/mirrors/gnu/gsl/gsl-2.2.1.tar.gz"
tar -xvf gsl-2.2.1.tar.gz
cd gsl-2.2.1
./configure --prefix=$INSTALL_LOC
make -j$(nproc)
make check
make install

```

--------------------------------

### Install CT14 PDF Sets

Source: https://herwig.hepforge.org/tutorials/installation/prerequisite.html

Install the CT14nlo and CT14lo parton density function sets using the lhapdf install command.

```bash
lhapdf install CT14nlo
lhapdf install CT14lo
```

--------------------------------

### Install GoSam

Source: https://herwig.hepforge.org/tutorials/installation/prerequisite.html

Download and run the GoSam installer script to set up the package for calculating tree-level and one-loop amplitudes. It is recommended to perform this in a new directory.

```bash
mkdir gosam
cd gosam
wget "http://gosam.hepforge.org/gosam_installer.py"
chmod 0755 ./gosam_installer.py
./gosam_installer.py -b -v --prefix=$INSTALL_LOC
```

--------------------------------

### Install Boost Libraries

Source: https://herwig.hepforge.org/tutorials/installation/prerequisite.html

Download, extract, and install Boost libraries with specific configuration for Herwig compatibility. Ensure `--layout=tagged` is used.

```bash
cd /where/to/build/boost
wget -O boost_1_62_0.tar.gz "http://sourceforge.net/projects/boost/files/boost/1.62.0/boost_1_62_0.tar.gz/download"
tar -xvf boost_1_62_0.tar.gz
cd boost_1_62_0
./bootstrap.sh --prefix=$INSTALL_LOC --with-python=$(which python)
./b2 install --layout=tagged

```

--------------------------------

### Install Trac with Database Support using pip

Source: https://herwig.hepforge.org/trac/wiki/TracInstall

Install Trac with support for MySQL or PostgreSQL databases by including the respective package names in the pip install command.

```bash
pip install Trac[mysql,psycopg2-binary]
```

--------------------------------

### Build and Install Herwig

Source: https://herwig.hepforge.org/tutorials/installation/manual.html

Build the Herwig program using make with parallel processing and then install it. The 'make check' command is recommended for verifying the build integrity.

```bash
make -j$(nproc)
make check
make install

```

--------------------------------

### Install Trac from Source using pip

Source: https://herwig.hepforge.org/trac/wiki/TracInstall

Use this command to install Trac from a local source archive after extracting it. Ensure you are in the directory containing setup.py.

```bash
pip install .
```

--------------------------------

### Install Trac with Extras using pip

Source: https://herwig.hepforge.org/trac/wiki/TracInstall

Install Trac along with optional dependencies specified via the 'extras' key. 'rest' includes the docutils dependency.

```bash
pip install Trac[babel,rest,pygments,textile]
```

--------------------------------

### Configure Herwig Installation (Minimal)

Source: https://herwig.hepforge.org/tutorials/installation/manual.html

Configure Herwig for a minimal installation, excluding matrix element and decay programs. This is useful when only the core Herwig functionality is required.

```bash
./configure --prefix=$INSTALL_LOC --with-thepeg=$INSTALL_LOC \
            --with-fastjet=$INSTALL_LOC --with-gsl=$INSTALL_LOC \
            --with-boost=$INSTALL_LOC

```

--------------------------------

### Diff Renderer Example

Source: https://herwig.hepforge.org/trac/wiki/WikiProcessors

Showcases the `#!diff` processor for rendering differences between two versions of text. It includes an example of Python code snippet with entry points.

```wiki
[[BR]]
{{{#!diff
--- Version 55
+++ Version 56
@@ -115,8 +115,9 @@
    name='TracHelloWorld', version='1.0',
    packages=find_packages(exclude=['*.tests*']),
-    entry_points = """
-        [trac.plugins]
-        helloworld = myplugs.helloworld
-    """,
+    entry_points = {
+        'trac.plugins': [
+            'helloworld = myplugs.helloworld',
+        ],
+    },
 )}}}
```

--------------------------------

### Wiki Macro Call Examples

Source: https://herwig.hepforge.org/trac/wiki/WikiMacros

Illustrates different ways to invoke the HelloWorld macro, including with processor arguments and as a standard wiki link.

```wiki
{{{#!HelloWorld style="polite" -silent verbose
<Hello World!>
}}}
```

```wiki
{{{#!HelloWorld
<Hello World!>
}}}
```

```wiki
[[HelloWorld(<Hello World!>)]]
```

--------------------------------

### Install Tracd as a Windows Service with SRVANY

Source: https://herwig.hepforge.org/trac/wiki/TracStandalone

Installs Tracd as a Windows service using SRVANY. This involves registering python.exe with tracd.exe as a parameter and configuring the service to start automatically.

```bash
 C:\path\to\instsrv.exe tracd C:\path\to\srvany.exe
 reg add HKLM\SYSTEM\CurrentControlSet\Services\tracd\Parameters /v Application /d ""C:\path\to\python.exe" "C:\path\to\python\scripts\tracd.exe" <your tracd parameters>"
```

```bash
 net start tracd
```

```bash
 sc config tracd start= auto
```

--------------------------------

### Full Trac workflow configuration example

Source: https://herwig.hepforge.org/trac/wiki/TracWorkflow

A comprehensive example of a Trac ticket workflow configuration, including default and custom states and actions. This serves as a complete reference for workflow setup.

```trac-workflow
[ticket-workflow]
create = <none> -> new
create.default = 1
create_and_assign = <none> -> assigned
create_and_assign.label = assign
create_and_assign.permissions = TICKET_MODIFY
create_and_assign.operations = may_set_owner
accept = new,reviewing -> assigned
accept.operations = set_owner_to_self
accept.permissions = TICKET_MODIFY
leave = * -> *
leave.default = 1
leave.operations = leave_status
reassign = new,assigned,accepted,reopened -> assigned
reassign.operations = set_owner
reassign.permissions = TICKET_MODIFY
reopen = closed -> reopened
reopen.operations = del_resolution
reopen.permissions = TICKET_CREATE
resolve = new,assigned,reopened,reviewing -> closed
resolve.operations = set_resolution
resolve.permissions = TICKET_MODIFY
review = new,assigned,reopened -> reviewing
review.operations = set_owner
review.permissions = TICKET_MODIFY
reassign_reviewing = reviewing -> *
reassign_reviewing.operations = set_owner, leave_status
reassign_reviewing.label = reassign review
reassign_reviewing.permissions = TICKET_MODIFY
```

--------------------------------

### Install python-flup for Trac SCGI Capability

Source: https://herwig.hepforge.org/trac/wiki/TracFastCgi

If tracd fails to start and Cherokee shows a 503 error, the python-flup package might be missing. Install it using apt-get on Debian-based systems.

```bash
sudo apt-get install python-flup
```

--------------------------------

### Display Herwig Bootstrap Help

Source: https://herwig.hepforge.org/tutorials/installation/bootstrap.html

Show all available options for the Herwig installation process.

```bash
./herwig-bootstrap --help
```

--------------------------------

### Install Tracd as a Windows Service with WINSERV

Source: https://herwig.hepforge.org/trac/wiki/TracStandalone

Installs Tracd as a Windows service using the WINSERV utility, suitable for Windows 7 users when SRVANY may not be an option. Configures the service to start automatically.

```bash
"C:\path\to\winserv.exe" install tracd -displayname "tracd" -start auto "C:\path\to\python.exe" c:\path\to\python\scripts\tracd.exe <your tracd parameters>"
```

```bash
net start tracd
```

--------------------------------

### Count Tickets by Status

Source: https://herwig.hepforge.org/trac/wiki/TicketQuery

Use the 'count' format to get the number of tickets matching specific criteria. This example counts new tickets.

```tracwiki
[[TicketQuery(status=new,count)]]
```

--------------------------------

### Install Development Preview using pip with Find-Links

Source: https://herwig.hepforge.org/trac/wiki/TracInstall

Install a development preview of Trac using pip, specifying a URL for finding package links. Not recommended for production environments.

```bash
pip install --find-links=https://trac.edgewall.org/wiki/TracDownload Trac
```

--------------------------------

### Test mod_python Installation

Source: https://herwig.hepforge.org/trac/wiki/TracModPython

Configure this location in Apache to test your mod_python setup. Remove it for security reasons after testing. Requires mod_python 3.2+.

```apache
<Location /mpinfo>
  SetHandler mod_python
  PythonInterpreter main_interpreter
  PythonHandler mod_python.testhandler
  # For Apache 2.2
  <IfModule !mod_authz_core.c>
    Order allow,deny
    Allow from all
  </IfModule>
  # For Apache 2.4
  <IfModule mod_authz_core.c>
    Require all granted
  </IfModule>
</Location>

```

--------------------------------

### Run Herwig and process with Delphes

Source: https://herwig.hepforge.org/tutorials/workflow/inputoutput.html

Run Herwig to generate events, then pipe the HepMC output to Delphes for detector simulation. This example assumes Delphes is installed.

```bash
Herwig read LHC.in; Herwig run LHC.run -N1000
```

```bash
rm test.root; cat LHC.hepmc | [path_to_delphes]/DelphesHepMC [path_to_delphes]/cards/delphes_card_ATLAS.tcl test.root
```

--------------------------------

### Copy Example Input File

Source: https://herwig.hepforge.org/tutorials/gettingstarted/firstrun.html

Copy a sample input file, such as 'LHC-Matchbox.in', from the Herwig share directory to your current working directory for modification and use.

```bash
[example] $ cp <HERWIGPATH>/share/Herwig/LHC-Matchbox.in .
```

--------------------------------

### Run Standalone Trac Server

Source: https://herwig.hepforge.org/trac/wiki/TracInstall

This command starts the built-in Trac web server for quick testing. Access it via http://localhost:8000/. The '-s' flag skips the environment list for single-project setups.

```bash
$ tracd --port 8000 /path/to/myproject
```

```bash
$ tracd -s --port 8000 /path/to/myproject
```

--------------------------------

### Configure Initial Hard Process (W+W+)

Source: https://herwig.hepforge.org/tutorials/mpi/several_hard.html

Sets up the initial hard process to be W+W+ production and decay to e+νee+νe. This involves selecting the matrix element and specifying charge and process details.

```bash
cd /Herwig/MatrixElements
insert SubProcess:MatrixElements[0] MEqq2W2ff
# only W+
set MEqq2W2ff:Wcharge 1
# only positrons
set MEqq2W2ff:Process 3
```

--------------------------------

### InterMapTxt Example Prefixes

Source: https://herwig.hepforge.org/trac/wiki/InterWiki

Illustrates defining InterWiki prefixes and their mappings within the InterMapTxt wiki page, including comments and parametric URLs.

```text
= InterMapTxt =
== This is the place for defining InterWiki prefixes ==

Currently active prefixes: [[InterWiki]]

This page is modelled after the MeatBall:InterMapTxt page.
In addition, an optional comment is allowed after the mapping.
----
{
PEP      http://www.python.org/peps/pep-$1.html           # Python Enhancement Proposal $1
Trac-ML  http://thread.gmane.org/gmane.comp.version-control.subversion.trac.general/$1  # Message $1 in Trac Mailing List

tsvn     tsvn:                                            # Interact with TortoiseSvn
...
MeatBall http://www.usemod.com/cgi-bin/mb.pl?
MetaWiki http://sunir.org/apps/meta.pl?
MetaWikiPedia http://meta.wikipedia.org/wiki/
MoinMoin http://moinmoin.wikiwikiweb.de/
...
}


```

--------------------------------

### Resource Matching Examples

Source: https://herwig.hepforge.org/trac/wiki/TracFineGrainedPermissions

Illustrates glob patterns for matching Trac resources, including WikiStart page and its attachments.

```ini
[wiki:*]
[wiki:WikiStart*]
[wiki:WikiStart@*]
[wiki:WikiStart]

```

```ini
[wiki:*]
[wiki:WikiStart*]
[wiki:WikiStart@*]
[wiki:WikiStart@*/attachment:*]
[wiki:WikiStart@117/attachment:FOO.JPG]

```

--------------------------------

### tracd Basic Authentication Example

Source: https://herwig.hepforge.org/trac/wiki/TracStandalone

A concrete example of running tracd with Basic authentication, specifying the project, the full path to the htpasswd file, and a realm name.

```bash
$ tracd -p 8080 --basic-auth="project,/srv/tracenv/testenv/.htpasswd,My Test Env" /path/to/project

```

--------------------------------

### Install Rivet with Bootstrap

Source: https://herwig.hepforge.org/tutorials/installation/prerequisite.html

Use the rivet-bootstrap script to install Rivet, ensuring that Boost is not installed by Rivet itself if already managed separately. Set INSTALL_BOOST=0.

```bash
INSTALL_PREFIX=$INSTALL_LOC INSTALL_BOOST=0 BOOSTPATH=$INSTALL_LOC MAKE="make -j $(nproc)" ./rivet-bootstrap

```

--------------------------------

### Wiki Processor Example

Source: https://herwig.hepforge.org/trac/wiki/WikiMacros

Demonstrates the syntax for using a wiki processor within Trac for tasks like source code highlighting.

```wiki
{{{
#!wiki-processor-name
...
}}}
```

--------------------------------

### Download and Install EvtGen

Source: https://herwig.hepforge.org/tutorials/installation/prerequisite.html

Download, extract, configure, and install the EvtGen decay package. This requires specifying the installation prefix and paths for HepMC, TAUOLA, PHOTOS, and Pythia8.

```bash
wget "http://evtgen.warwick.ac.uk/static/srcrep/R01-06-00/EvtGen.R01-06-00.tar.gz"
tar xzf EvtGen.R01-06-00.tar.gz
cd EvtGen/R01-06-00
./configure --prefix=$INSTALL_LOC --prefix=$INSTALL_LOC --hepmcdir=$INSTALL_LOC \
            --tauoladir=$INSTALL_LOC --photosdir=$INSTALL_LOC --pythiadir=$INSTALL_LOC
 make -s -j$(nproc)
 make -s install
```

--------------------------------

### Run MadGraph Initial Process

Source: https://herwig.hepforge.org/tutorials/installation/prerequisite.html

Run a simple process with MadGraph to generate initial files and avoid potential issues with read-only filesystems. This is a recommended step after downloading MadGraph.

```bash
cd MG5_aMC_v2_5_3/
bin/mg5_aMC
  generate e+ e- > u u~
  output
  quit()
rm -rf PROC_sm_0
```

--------------------------------

### HTML Syntax Highlighting Example

Source: https://herwig.hepforge.org/trac/wiki/WikiProcessors

Demonstrates using the `#!text/html` processor for syntax highlighting of HTML code within a wiki page. The output is rendered as highlighted HTML.

```wiki
[[BR]]
{{{#!text/html
<h1>text</h1>
}}}
```

```html
<h1>text</h1>
```

--------------------------------

### Download and Install Pythia8

Source: https://herwig.hepforge.org/tutorials/installation/prerequisite.html

Download, extract, configure, and install the Pythia8 event generator, used by EvtGen for hadronization. Ensure you specify the installation prefix and enable shared libraries.

```bash
wget "http://home.thep.lu.se/~torbjorn/pythia8/pythia8186.tgz"
tar xzf pythia8186.tgz
cd pythia8186
./configure --prefix=$INSTALL_LOC --enable-shared --with-hepmc=$INSTALL_LOC
make -s -j$(nproc)
make -s install
```

--------------------------------

### Initialize Trac Environment with Repository Configuration

Source: https://herwig.hepforge.org/trac/wiki/TracEnvironment

Initialize a Trac environment using `trac-admin` and specify repository settings via a configuration file. This enables source code browsing.

```bash
$ trac-admin $ENV initenv --config=config.ini
$ cat config.ini
[components]
tracopt.versioncontrol.* = enabled

[repositories]
.dir = /path/to/default/type/repos
repos1.type = git
repos1.dir = /path/to/git/repos
repos2.type = svn
repos2.dir = /path/to/svn/repos
```

--------------------------------

### Download and Install PHOTOS

Source: https://herwig.hepforge.org/tutorials/installation/prerequisite.html

Download, extract, configure, and install the PHOTOS program for simulating QED radiation in decays. This is used by EvtGen and requires a specific prefix and HepMC installation path.

```bash
wget "http://photospp.web.cern.ch/photospp/resources/PHOTOS.3.61/PHOTOS.3.61.tar.gz"
tar xzf PHOTOS.3.61.tar.gz
cd PHOTOS
./configure --prefix=$INSTALL_LOC --with-hepmc=$INSTALL_LOC
make -s -j$(nproc)
make -s install
```

--------------------------------

### Download and Install TAUOLA

Source: https://herwig.hepforge.org/tutorials/installation/prerequisite.html

Download, extract, configure, and install the TAUOLA program for simulating tau lepton decays. This is used by EvtGen and requires a specific prefix and HepMC installation path.

```bash
wget "http://tauolapp.web.cern.ch/tauolapp/resources/TAUOLA.1.1.5/TAUOLA.1.1.5.tar.gz"
tar xzf TAUOLA.1.1.5.tar.gz
cd TAUOLA
./configure --prefix=$INSTALL_LOC --with-hepmc=$INSTALL_LOC
make -s -j$(nproc)
make -s install
```

--------------------------------

### Initialize Trac Project Environment

Source: https://herwig.hepforge.org/trac/wiki/TracInstall

Use this command to create a new Trac environment. It will prompt for project name and database connection details. Ensure the user running this command has write permissions to the project directory.

```bash
$ trac-admin /path/to/myproject initenv
```

--------------------------------

### Install mod_python on Fedora

Source: https://herwig.hepforge.org/trac/wiki/TracModPython

Use 'yum' to install the mod_python package on Fedora systems.

```bash
yum install mod_python

```

--------------------------------

### Configure and Build ThePEG

Source: https://herwig.hepforge.org/tutorials/installation/prerequisite.html

Configure and build ThePEG from source. This step requires specifying installation paths for various dependencies including FastJet, GSL, Rivet, HepMC, LHAPDF, and Boost.

```bash
cd ThePEG-2.1.0
./configure --prefix=$INSTALL_LOC --with-fastjet=$INSTALL_LOC \
             --with-gsl=$INSTALL_LOC --with-rivet=$INSTALL_LOC \
             --with-hepmc=$INSTALL_LOC --with-lhapdf=$INSTALL_LOC \
             --with-boost=$INSTALL_LOC
make -j$(nproc)
make check
make install
```

--------------------------------

### Set Installation Location

Source: https://herwig.hepforge.org/tutorials/installation/prerequisite.html

Define the environment variable INSTALL_LOC to specify the common installation directory for packages.

```bash
export INSTALL_LOC=/where/to/install/the/packages

```

--------------------------------

### Query Language Examples

Source: https://herwig.hepforge.org/trac/wiki/TracQuery

Examples demonstrating various operators and filtering conditions in the Trac query language.

```wiki
status=closed,keywords~=firefox
```

```wiki
status=closed,keywords~=opera
```

```wiki
status=closed,keywords~=firefox opera
```

```wiki
status=closed,keywords~=firefox|opera
```

```wiki
status=closed,keywords~=firefox,or,keywords~=opera
```

```wiki
status=closed,keywords~=firefox -opera
```

```wiki
status=closed,keywords~=opera -firefox
```

--------------------------------

### Single Trac Project FastCGI Setup

Source: https://herwig.hepforge.org/trac/wiki/TracFastCgi

Configure Lighttpd to serve a single Trac project via FastCGI. Ensure 'fcgi_binary' is correctly defined and 'TRAC_ENV' points to your project environment.

```lighttpd
fastcgi.server = ("/trac" =>
                   ("trac" =>
                     ("socket" => "/tmp/trac-fastcgi.sock",
                      "bin-path" => fcgi_binary,
                      "check-local" => "disable",
                      "bin-environment" =>
                        ("TRAC_ENV" => "/path/to/projenv")
                     )
                   )
                 )
}
```