Current File : //usr/share/augeas/lenses/dist/aptconf.aug
(*
Module: AptConf
Parses /etc/apt/apt.conf and /etc/apt/apt.conf.d/*
Author: Raphael Pinson <raphink@gmail.com>
About: Reference
This lens tries to keep as close as possible to `man 5 apt.conf`
where possible.
About: License
This file is licenced under the LGPL v2+, like the rest of Augeas.
About: Lens Usage
To be documented
About: Configuration files
This lens applies to /etc/apt/apt.conf and /etc/apt/apt.conf.d/*.
See <filter>.
*)
module AptConf =
autoload xfm
(************************************************************************
* Group: USEFUL PRIMITIVES
*************************************************************************)
(* View: eol
And <Util.eol> end of line *)
let eol = Util.eol
(* View: empty
A C-style empty line *)
let empty = Util.empty_any
(* View: indent
An indentation *)
let indent = Util.indent
(* View: comment_simple
A one-line comment, C-style *)
let comment_simple = Util.comment_c_style_or_hash
(* View: comment_multi
A multiline comment, C-style *)
let comment_multi = Util.comment_multiline
(* View: comment
A comment, either <comment_simple> or <comment_multi> *)
let comment = comment_simple | comment_multi
(************************************************************************
* Group: ENTRIES
*************************************************************************)
(* View: name_re
Regex for entry names *)
let name_re = /[A-Za-z][A-Za-z-]*/
(* View: name_re_colons
Regex for entry names with colons *)
let name_re_colons = /[A-Za-z][A-Za-z:-]*/
(* View: entry
An apt.conf entry, recursive
WARNING:
This lens exploits a put ambiguity
since apt.conf allows for both
APT { Clean-Installed { "true" } }
and APT::Clean-Installed "true";
but we're choosing to map them the same way
The recursive lens doesn't seem
to care and defaults to the first
item in the union.
This is why the APT { Clean-Installed { "true"; } }
form is listed first, since it supports
all subnodes (which Dpkg::Conf) doesn't.
Exchanging these two expressions in the union
makes tests fails since the tree cannot
be mapped back.
This situation results in existing
configuration being modified when the
associated tree is modified. For example,
changing the value of
APT::Clean-Installed "true"; to "false"
results in
APT { Clean-Installed "false"; }
(see unit tests)
*)
let rec entry_noeol =
let value =
Util.del_str "\"" . store /[^"\n]+/
. del /";?/ "\";" in
let opt_eol = del /[ \t\n]*/ "\n" in
let long_eol = del /[ \t]*\n+/ "\n" in
let list_elem = [ opt_eol . label "@elem" . value ] in
let eol_comment = del /([ \t\n]*\n)?/ "" . comment in
[ key name_re . Sep.space . value ]
| [ key name_re . del /[ \t\n]*\{/ " {" .
( (opt_eol . entry_noeol) |
list_elem |
eol_comment
)* .
del /[ \t\n]*\};?/ "\n};" ]
| [ key name_re . Util.del_str "::" . entry_noeol ]
let entry = indent . entry_noeol . eol
(* View: include
A file inclusion
/!\ The manpage is not clear on the syntax *)
let include =
[ indent . key "#include" . Sep.space
. store Rx.fspath . eol ]
(* View: clear
A list of variables to clear
/!\ The manpage is not clear on the syntax *)
let clear =
let name = [ label "name" . store name_re_colons ] in
[ indent . key "#clear" . Sep.space
. Build.opt_list name Sep.space
. eol ]
(************************************************************************
* Group: LENS AND FILTER
*************************************************************************)
(* View: lns
The apt.conf lens *)
let lns = (empty|comment|entry|include|clear)*
(* View: filter *)
let filter = incl "/etc/apt/apt.conf"
. incl "/etc/apt/apt.conf.d/*"
. Util.stdexcl
let xfm = transform lns filter
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