Hello
We are using chef-solo 11.8.2 and in a recipe, I’d like to use
Chef::Util::FileEdit.search_file_replace_line to replace a line
matching some regexp and “capture” what has been found and use this in
the replacement.
How? 
Now, in a recipe, we have got the following:
ruby_block “CIS: AutoFS start deaktivieren” do
block do
fe = Chef::Util::FileEdit.new("/etc/init/autofs.conf")
# “start on” auskommentieren
fe.search_file_replace_line(/^(start on.*)/,
"# removed because of CIS check:\n# \1"
)
# Datei schreiben
fe.write_file
end # of block do
end # of ruby_block “CIS: AutoFS start deaktivieren” do
This is supposed to comment any lines starting with “start on” in the
autofs.conf file. It should replace the lines with the following
"block":
removed because of CIS check:
start on…
With perl, I used to have this:
perl -pi -e ‘s/^(start on.*)/# removed because of CIS check:\n# $1/’
/etc/autofs.conf
This works.
But this does not:
fe.search_file_replace_line(/^(start on.*)/,
"# removed because of CIS check:\n# \1"
)
It has replaced the “start on” lines just fine, but it added a \1…
It should have replaced the \1 by what’s in the first “caputre”
(parentheses; ie. what’s in “(” … “)”; ie. “start on” and whatever is
following it).
How to do that?
Thanks a lot,
Alexander
=> Google+ => http://plus.skwar.me <==
=> Chat (Jabber/Google Talk) => a.skwar@gmail.com <==
I notice in poking through the source
https://github.com/chef/chef/blob/11.8.2/lib/chef/util/file_edit.rb#L109-L110
that Chef::Util::FileEdit#replace uses gsub!, while
Chef::Util::FileEdit#replace_line doesn’t.
gsub! will use your backreferences. Since your regexp starts with ^ and
ends with .*, it will match the entire line anyways; perhaps try replace
instead?
Matt Moretti
On Thu, Aug 27, 2015 at 8:34 AM, Alexander Skwar <
alexanders.mailinglists+nospam@gmail.com> wrote:
Hello
We are using chef-solo 11.8.2 and in a recipe, I'd like to use
Chef::Util::FileEdit.search_file_replace_line to replace a line
matching some regexp and "capture" what has been found and use this in
the replacement.
How? 
Now, in a recipe, we have got the following:
ruby_block "CIS: AutoFS start deaktivieren" do
block do
fe = Chef::Util::FileEdit.new("/etc/init/autofs.conf")
# "start on" auskommentieren
fe.search_file_replace_line(/^(start on.*)/,
"# removed because of CIS check:\n# \1"
)
# Datei schreiben
fe.write_file
end # of block do
end # of ruby_block "CIS: AutoFS start deaktivieren" do
This is supposed to comment any lines starting with "start on" in the
autofs.conf file. It should replace the lines with the following
"block":
removed because of CIS check:
start on...
With perl, I used to have this:
perl -pi -e 's/^(start on.*)/# removed because of CIS check:\n# $1/'
/etc/autofs.conf
This works.
But this does not:
fe.search_file_replace_line(/^(start on.*)/,
"# removed because of CIS check:\n# \1"
)
It has replaced the "start on" lines just fine, but it added a \1...
It should have replaced the \1 by what's in the first "caputre"
(parentheses; ie. what's in "(" .. ")"; ie. "start on" and whatever is
following it).
How to do that?
Thanks a lot,
Alexander
=> Google+ => http://plus.skwar.me <==
=> Chat (Jabber/Google Talk) => a.skwar@gmail.com <==
Hello Matt
Thanks a lot, replace works just fine
For the archive, I've now got:
ruby_block "CIS: AutoFS start deaktivieren" do
block do
fe = Chef::Util::FileEdit.new("/etc/init/autofs.conf")
# "start on" auskommentieren
fe.search_file_replace(/^(start on.*)/,
"# removed because of CIS check:\n# \1"
)
# Datei schreiben
fe.write_file
end # of block do
end # of ruby_block "CIS: AutoFS start deaktivieren" do
Or see View difference between Paste ID: <a href="/BQusWv7h">BQusWv7h</a> and <a href="/658ybMcL">658ybMcL</a> - Pastebin.com for a diff…
I had to use "\1" instead of "\1", as I'm in a double quoted string
(-> "). I'm in a double quoted string, as I'd like \n to add a new
line.
Matt,
thanks! You helped me very much!
Cheers,
Alexander
2015-08-27 15:15 GMT+02:00 Matthew Moretti werebus@gmail.com:
I notice in poking through the source that Chef::Util::FileEdit#replace uses
gsub!, while Chef::Util::FileEdit#replace_line doesn’t.
gsub! will use your backreferences. Since your regexp starts with ^ and ends
with .*, it will match the entire line anyways; perhaps try replace instead?
Matt Moretti
On Thu, Aug 27, 2015 at 8:34 AM, Alexander Skwar
alexanders.mailinglists+nospam@gmail.com wrote:
Hello
We are using chef-solo 11.8.2 and in a recipe, I'd like to use
Chef::Util::FileEdit.search_file_replace_line to replace a line
matching some regexp and "capture" what has been found and use this in
the replacement.
How?
Now, in a recipe, we have got the following:
ruby_block "CIS: AutoFS start deaktivieren" do
block do
fe = Chef::Util::FileEdit.new("/etc/init/autofs.conf")
# "start on" auskommentieren
fe.search_file_replace_line(/^(start on.*)/,
"# removed because of CIS check:\n# \1"
)
# Datei schreiben
fe.write_file
end # of block do
end # of ruby_block "CIS: AutoFS start deaktivieren" do
This is supposed to comment any lines starting with "start on" in the
autofs.conf file. It should replace the lines with the following
"block":
removed because of CIS check:
start on...
With perl, I used to have this:
perl -pi -e 's/^(start on.*)/# removed because of CIS check:\n# $1/'
/etc/autofs.conf
This works.
But this does not:
fe.search_file_replace_line(/^(start on.*)/,
"# removed because of CIS check:\n# \1"
)
It has replaced the "start on" lines just fine, but it added a \1...
It should have replaced the \1 by what's in the first "caputre"
(parentheses; ie. what's in "(" .. ")"; ie. "start on" and whatever is
following it).
How to do that?
Thanks a lot,
Alexander
=> Google+ => http://plus.skwar.me <==
=> Chat (Jabber/Google Talk) => a.skwar@gmail.com <==
--
Alexander
=> Google+ => http://plus.skwar.me <==
=> Chat (Jabber/Google Talk) => a.skwar@gmail.com <==
You might want to take a look at the "line" cookbook. It includes resources
for managing file content in place using the FileEdit methods.
https://supermarket.chef.io/cookbooks/line
On Thu, Aug 27, 2015 at 7:35 AM, Alexander Skwar <
alexanders.mailinglists+nospam@gmail.com> wrote:
Hello Matt
Thanks a lot, replace works just fine
For the archive, I've now got:
ruby_block "CIS: AutoFS start deaktivieren" do
block do
fe = Chef::Util::FileEdit.new("/etc/init/autofs.conf")
# "start on" auskommentieren
fe.search_file_replace(/^(start on.*)/,
"# removed because of CIS check:\n# \1"
)
# Datei schreiben
fe.write_file
end # of block do
end # of ruby_block "CIS: AutoFS start deaktivieren" do
Or see View difference between Paste ID: <a href="/BQusWv7h">BQusWv7h</a> and <a href="/658ybMcL">658ybMcL</a> - Pastebin.com for a diff…
I had to use "\1" instead of "\1", as I'm in a double quoted string
(-> "). I'm in a double quoted string, as I'd like \n to add a new
line.
Matt,
thanks! You helped me very much!
Cheers,
Alexander
2015-08-27 15:15 GMT+02:00 Matthew Moretti werebus@gmail.com:
I notice in poking through the source that Chef::Util::FileEdit#replace
uses
gsub!, while Chef::Util::FileEdit#replace_line doesn’t.
gsub! will use your backreferences. Since your regexp starts with ^ and
ends
with .*, it will match the entire line anyways; perhaps try replace
instead?
Matt Moretti
On Thu, Aug 27, 2015 at 8:34 AM, Alexander Skwar
alexanders.mailinglists+nospam@gmail.com wrote:
Hello
We are using chef-solo 11.8.2 and in a recipe, I'd like to use
Chef::Util::FileEdit.search_file_replace_line to replace a line
matching some regexp and "capture" what has been found and use this in
the replacement.
How?
Now, in a recipe, we have got the following:
ruby_block "CIS: AutoFS start deaktivieren" do
block do
fe = Chef::Util::FileEdit.new("/etc/init/autofs.conf")
# "start on" auskommentieren
fe.search_file_replace_line(/^(start on.*)/,
"# removed because of CIS check:\n# \1"
)
# Datei schreiben
fe.write_file
end # of block do
end # of ruby_block "CIS: AutoFS start deaktivieren" do
This is supposed to comment any lines starting with "start on" in the
autofs.conf file. It should replace the lines with the following
"block":
removed because of CIS check:
start on...
With perl, I used to have this:
perl -pi -e 's/^(start on.*)/# removed because of CIS check:\n# $1/'
/etc/autofs.conf
This works.
But this does not:
fe.search_file_replace_line(/^(start on.*)/,
"# removed because of CIS check:\n# \1"
)
It has replaced the "start on" lines just fine, but it added a \1...
It should have replaced the \1 by what's in the first "caputre"
(parentheses; ie. what's in "(" .. ")"; ie. "start on" and whatever is
following it).
How to do that?
Thanks a lot,
Alexander
=> Google+ => http://plus.skwar.me <==
=> Chat (Jabber/Google Talk) => a.skwar@gmail.com <==
--
Alexander
=> Google+ => http://plus.skwar.me <==
=> Chat (Jabber/Google Talk) => a.skwar@gmail.com <==