Forum: CFEngine Help
Subject: Re: How-to insert multi line string at the top of file ?
Author: juriskrumins
Link to topic: https://cfengine.com/forum/read.php?3,27226,27256#msg-27256
Executing the policy you've provided (no changes) using my cfengine
installation gives following results:
# cf-agent -V
@@@
@@@ cf-agent
@ @@@ @ CFEngine Core 3.3.5
@ @@@ @
@ @@@ @
@ @
@@@
@ @
@ @
@ @
Copyright (C) CFEngine AS 2008-2012
See Licensing at http://cfengine.com/3rdpartylicenses
# ls /tmp/nhw*
ls: cannot access /tmp/nhw*: No such file or directory
# cat promises2.cf
body common control {
bundlesequence => {
"main",
};
inputs => {
"cfengine_stdlib.cf",
};
}
bundle agent main {
vars:
"edit_file" string => "/tmp/nhw_test";
"first_line" string => "This is the old first line.";
methods:
"any" usebundle => create_file("${edit_file}", "${first_line}");
"any" usebundle => edit_file("${edit_file}", "${first_line}");
}
bundle agent create_file(file, line) {
files:
"${file}"
edit_defaults => empty,
create => 'true',
edit_line => append_if_no_line("${line}");
}
bundle agent edit_file(file, line){
vars:
"new_first_lines" string =>
"#### one
#### two
#### three";
files:
"${file}"
edit_line => insert_at_top("${new_first_lines}",
"${line}");
}
bundle edit_line insert_at_top(block, first){
insert_lines:
"${block}"
insert_type => 'preserve_block',
location => before("${first}");
}
# cf-agent -KI -f /root/cfpol/promises2.cf
-> Created file /tmp/nhw_test, mode = 600
-> Edited file /tmp/nhw_test
-> Edited file /tmp/nhw_test
# cat /tmp/nhw_test
#### three
#### two
#### one
This is the old first line.
And this is not what I expect to see. By the way I've also tried things that by
myself using "preserve_block" with no luck. And that's the reason I've started
this thread.
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