shell_sequencer

Shell script as wrapper for sequential tasks, such as complex server installations or recurring maintenance tasks.

The sequence script (seq) containing different steps is separated from the sequence control (sequencer.sh). The seq just needs to "include" the sequencer.sh at the end.

sequencer.sh

Main sequencer script to be included at the end of a seq.

seqs/

Contains sequences (seqs) for different tools, servers or occasions.

Sequencer include working on sh and bash.

[...]
. /usr/local/bin/sequencer.sh

see seqTemplateExample.sh (which can be generated when calling sequencer.sh directly)

Installation recommendation

To make all seqs avaialable to all user, follow the procedure below.

Run folloing commands as root:

git clone https://winklerfamilie.eu/git/efelon/shell_sequencer.git /opt/sequencer
ln -s /opt/sequencer/sequencer/sequencer.sh /usr/local/bin
ln -s /opt/sequencer/seqs /opt

or

use the simple bash installation script in the repository which installs git and performs the steps above:

curl -L https://winklerfamilie.eu/git/efelon/shell_sequencer/raw/branch/master/install.sh | bash

You may override the default installation path /opt/sequencer by appending -s /custom/path to the command above:

e.g. curl -L https://winklerfamilie.eu/git/efelon/shell_sequencer/raw/branch/master/install.sh | bash -s /usr/lib/sequencer

Bash-completion

The included optional bash-completion script sqnall-completion.bash provides aliases to all available sequences as well as completion for sequencer.sh options and steps (including aliases) individually for each sequence. The aliases have the prefix sqn_ which stands for sequence name.

After executing

source /opt/sequencer/sqnall-completion.bash

e.g. /opt/sequencer/seqs/kodi.sh can be started anyhere with sqn_kodi

Custom sequence directory

To control which seqs are available for bash-completion, copy sequencer.cfg.dist to sequencer.cfg and adjust the value of the variable SEQUENCER_USER_SEQS.

To make these changes active run the following commands. You don't need the last step if you already used installCompletion.sh.

unalias -a
source ~/.bashrc
source /opt/sequencer/sqnall-completion.bash

or simply logout from the current session and login again.

Automatic setup after login

To automatically provide aliases and bash-completion after login, the following bash script needs to be executed once for each user separately:

source /opt/sequencer/installCompletion.sh

This sources the bash-completion script in the users .bashrc file.

Default text editor

Sequencer uses the Debian alternatives system to the select which editor to use. To change the default editor, which by default is most likely nano:

update-alternatives --config editor