Cfengine Help: Re: Lengthy in-line bash commands

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Forum: Cfengine Help
Subject: Re: Lengthy in-line bash commands
Author: sauer
Link to topic: https://cfengine.com/forum/read.php?3,22195,22275#msg-22275

So, basically you're doing

create base source directory
either update the existing source or check the source out depending on whether 
or not directory exists
run a few build commands in the source directory

I'm thinking something like this would be a good start to doing it with little 
to no external scripting, if you're dead set on getting rid of the shell script.


bundle agent build {
vars:
  # base build dir
  "base" string => "/tmp/build";
  # classname prefix so builddir can communicate w/ dosrc
  "pre"  string => "has_dir_";
  # list o' packages
  "pkgs" slist  => { "pkga", "pkgb" };
  # default commands
  "defget"  string => "cvs co";
  "defupd"  string => "cvs update -d -P";
  "defmake" string => "make all";
  "definst" string => "make install";
  # package-specific commands
  "make" string => "crazymake arg arg arg";
  "inst" string => "cp -a . /tmp/deleteme";
methods:
  "dirtest" usebundle => checkdir("$(pkgs)");
  "dirs"    usebundle => builddir("$(pkgs)");
  "build"   usebundle => dobuilds("$(pkgs)");
}

# gotta be a common bundle so other bundles can see the class :/
bundle common checkdir(p){
vars:
  "classname" string => canonify("$(build.pre)$(p)");
classes:
  "$(classname)" expression => isdir("$(build.base)/$(p)/");
}

# create basedir, maybe set some permissions
bundle agent builddir(pkg){
files:
  "$(build.base)/."        create => "true";
  #"$(build.base)/$(pkg)/." create => "true";
}

# just a wrapper to allow default or overridden values
bundle agent dobuilds(pkg){
vars:
  "classname" string => canonify( "$(build.pre)$(pkg)" );
classes:
  "hasget"  expression => isvariable("build.get[$(pkg)]" );
  "hasupd"  expression => isvariable("build.upd[$(pkg)]" );
  "hasmake" expression => isvariable("build.make[$(pkg)]");
  "hasinst" expression => isvariable("build.inst[$(pkg)]");
methods:
  # get or update source
  hasget::   "get"  usebundle  => runcmd("$(pkg)", "$(build.get[$(pkg)])"),
                    ifvarclass => "!$(classname)";
  !hasget::  "get"  usebundle  => runcmd("$(pkg)", "$(build.defget)"     ),
                    ifvarclass => "!$(classname)";
  hasupd::   "upd"  usebundle  => runcmd("$(pkg)", "$(build.upd[$(pkg)])"),
                    ifvarclass => "$(classname)";
  !hasupd::  "upd"  usebundle  => runcmd("$(pkg)", "$(build.defupd)"     ),
                    ifvarclass => "$(classname)";
  # make
  hasmake::  "make" usebundle  => runcmd("$(pkg)", "$(build.make[$(pkg)])" );
  !hasmake:: "make" usebundle  => runcmd("$(pkg)", "$(build.defmake)"      );

  # install
  hasinst::  "inst" usebundle  => runcmd("$(pkg)", "$(build.inst[$(pkg)])" );
  !hasinst:: "inst" usebundle  => runcmd("$(pkg)", "$(build.definst)"      );
}

# run actual command
bundle agent runcmd(pkg, cmd){
commands:
  !done:: "$(cmd)" contain => in_dir("$(build.base)/$(pkg)"),
                   classes => if_ok("done");
}


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