`foomatic-db-engine` contains several perl scripts to parse
and process XML files from the Foomatic database packages.
It can be used to extract ppd files,
which will be accomplished in a follow-up commit.
The package also contains scripts
to handle print queues and jobs.
It can -- optionally -- talk to the local cups server,
to network printers and to SMB print servers.
The build recipe contains switches to enable these features;
however, they are not needed when generating ppd files.
There is a daily snapshot of a source archive available at
https://www.openprinting.org/download/foomatic/ .
However, these files rotate daily and
cannot be used as a stable download source.
So we rely on OpenPrinting's Github repository
instead and pinpoint a fresh commit.
ppd files in the `samsung-unified-linux-driver`
package invoke these filter commands:
* pstosecps
* pstospl
* rastertospl
* pstosplc
The paths to all of those commands excluding the last one got
patched with their absolute paths during the build process.
This commit adds the last one to
the list of commands to be patched.
The `sed` script in the `installPhase` is removed.
Instead, the setup hook `patchPpdFilesHook` is
used to patch the path to the filter executables.
The result should essentially be the same.
Comparing the generated ppd files showed no difference,
short of the package's hash in the absolute paths and
added newline characters at the end of some ppd files.
Missing newline characters at the end of the last line are
apparently added by `awk`; this shouldn't affect functionality.
The new package also contains a `propagated-build-inputs`
file which propagates the package itself.
This ensures the package is available whenever
a ppd file is singled out by another package.
The `sed` script in the `installPhase` is removed.
Instead, the setup hook `patchPpdFilesHook`
is used to patch the path to `rastertokpsl`.
The result should essentially be the same.
Comparing the generated ppd files showed no difference
(short of the package's hash in the absolute paths).
The new package also contains a `propagated-build-inputs`
file which propagates the package itself.
This ensures the package is available whenever
a ppd file is singled out by another package.
The `cups-drv-rastertosag-gdi` CUPS printer driver
package provides a filter executable `rastertosag-gdi`
and two ppd files that reference the filter file.
The commit at hand uses `patchPpdFilesHook` to
replace calls to the filter executable with
absolute paths to increase package purity.
