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Comments on How to open a file and edit its content in groovy script
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How to open a file and edit its content in groovy script
I have a Makefile in my Jenkins job's workspace, that I want to edit out certain parts from and then save it, before running next part of the script that uses this Makefile.
The part that I want to cut out is this:
PUMP_MARKER:=,cpp
ifneq (,$(findstring $(PUMP_MARKER), $(DISTCC_HOSTS)))
PUMP:=pump
else
PUMP:=
endif
I am looking for some shell command that I could put in my Groovy script, that will open up this file and remove this above mentioned part, save it and then move on.
Here is how my Groovy script looks like:
stage('Build'){
dir ("$WORKSPACE/$SVN_TAG") {
Here- I want to insert some shell command to edit that file out
}
}
Note: I know I could just vi that file and manually do this but I want to do this for multiple jobs and I'm genuinely looking for something that I can just paste in my every Groovy script and automatically do this.
Post
One simple possibility to eliminate a set of lines with precisely known content is to use the patch tool. The below code shows an example shell script.
The script calls patch on the file to be modified (in this case foo.txt). The patch tool then also gets on the standard input the diff it shall apply. This is in the code below achieved using the "here document" mechanism from the shell, see the << followed by the quoted identifier END. Quoting END is necessary to ensure the subsequent diff text is not subject to expansions.
patch foo.txt <<'END'
1,6d0
< PUMP_MARKER:=,cpp
< ifneq (,$(findstring $(PUMP_MARKER), $(DISTCC_HOSTS)))
< PUMP:=pump
< else
< PUMP:=
< endif
END
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