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shellvars.aug
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(* Module: Shellvars Generic lens for shell-script config files like the ones found in /etc/sysconfig About: License This file is licenced under the LGPL v2+, like the rest of Augeas. About: Lens Usage To be documented *) module Shellvars = autoload xfm (* Delete a blank line, rather than mapping it *) let del_empty = del (Util.empty_generic_re . "\n") "\n" let empty = Util.empty let empty_part_re = Util.empty_generic_re . /\n+/ let eol = del (/[ \t]+|[ \t]*[;\n]/ . empty_part_re*) "\n" let semicol_eol = del (/[ \t]*[;\n]/ . empty_part_re*) "\n" let brace_eol = del /[ \t\n]+/ "\n" let key_re = /[A-Za-z0-9_][-A-Za-z0-9_]*(\[[0-9A-Za-z_,]+\])?/ - ("unset" | "export") let matching_re = "${!" . key_re . /[\*@]\}/ let eq = Util.del_str "=" let eol_for_comment = del /([ \t]*\n)([ \t]*(#[ \t]*)?\n)*/ "\n" let comment = Util.comment_generic_seteol /[ \t]*#[ \t]*/ " # " eol_for_comment (* comment_eol in shell MUST begin with a space *) let comment_eol = Util.comment_generic_seteol /[ \t]+#[ \t]*/ " # " eol_for_comment let comment_or_eol = comment_eol | semicol_eol let xchgs = Build.xchgs let semicol = del /;?/ "" let char = /[^`;()'"&|\n\\# \t]#*|\\\\./ let dquot = let char = /[^"\\]|\\\\./ | Rx.cl in "\"" . char* . "\"" (* " Emacs, relax *) let squot = /'[^']*'/ let bquot = /`[^`\n]+`/ (* dbquot don't take spaces or semi-colons *) let dbquot = /``[^` \t\n;]+``/ let dollar_assign = /\$\([^\(\)#\n]*\)/ let dollar_arithm = /\$\(\([^\)#\n]*\)\)/ let anyquot = (char|dquot|squot|dollar_assign|dollar_arithm)+ | bquot | dbquot let sto_to_semicol = store (anyquot . (Rx.cl_or_space . anyquot)*) (* Array values of the form '(val1 val2 val3)'. We do not handle empty *) (* arrays here because of typechecking headaches. Instead, they are *) (* treated as a simple value *) let array = let array_value = store anyquot in del /\([ \t]*/ "(" . counter "values" . [ seq "values" . array_value ] . [ del /[ \t\n]+/ " " . seq "values" . array_value ] * . del /[ \t]*\)/ ")" (* Treat an empty list () as a value '()'; that's not quite correct *) (* but fairly close. *) let simple_value = let empty_array = /\([ \t]*\)/ in store (anyquot | empty_array)? let export = [ key "export" . Util.del_ws_spc ] let kv = Util.indent . export? . key key_re . eq . (simple_value | array) let var_action (name:string) = Util.indent . del name name . Util.del_ws_spc . label ("@" . name) . counter "var_action" . Build.opt_list [ seq "var_action" . store (key_re | matching_re) ] Util.del_ws_spc let unset = var_action "unset" let bare_export = var_action "export" let source = Util.indent . del /\.|source/ "." . label ".source" . Util.del_ws_spc . store /[^;=# \t\n]+/ let shell_builtin_cmds = "ulimit" | "shift" | "exit" let eval = Util.indent . Util.del_str "eval" . Util.del_ws_spc . label "@eval" . store anyquot let alias = Util.indent . Util.del_str "alias" . Util.del_ws_spc . label "@alias" . store key_re . eq . [ label "value" . store anyquot ] let builtin = Util.indent . label "@builtin" . store shell_builtin_cmds . (Sep.cl_or_space . [ label "args" . sto_to_semicol ])? let keyword (kw:string) = Util.indent . Util.del_str kw let keyword_label (kw:string) (lbl:string) = keyword kw . label lbl let return = Util.indent . label "@return" . Util.del_str "return" . ( Util.del_ws_spc . store Rx.integer )? let action (operator:string) (lbl:string) (sto:lens) = let sp = Rx.cl_or_opt_space | /[ \t\n]+/ in [ del (sp . operator . sp) (" " . operator . " ") . label ("@".lbl) . sto ] let action_pipe = action "|" "pipe" let action_and = action "&&" "and" let action_or = action "||" "or" let condition = let cond (start:string) (end:string) = [ label "type" . store start ] . Util.del_ws_spc . sto_to_semicol . Util.del_ws_spc . Util.del_str end . ( action_and sto_to_semicol | action_or sto_to_semicol )* in Util.indent . label "@condition" . (cond "[" "]" | cond "[[" "]]") (* Entry types *) let entry_eol_item (item:lens) = [ item . comment_or_eol ] let entry_item (item:lens) = [ item ] let entry_eol_nocommand = entry_eol_item source | entry_eol_item kv | entry_eol_item unset | entry_eol_item bare_export | entry_eol_item builtin | entry_eol_item return | entry_eol_item condition | entry_eol_item eval | entry_eol_item alias let entry_noeol_nocommand = entry_item source | entry_item kv | entry_item unset | entry_item bare_export | entry_item builtin | entry_item return | entry_item condition | entry_item eval | entry_item alias (* Command *) let rec command = let env = [ key key_re . eq . store anyquot . Sep.cl_or_space ] in let reserved_key = /exit|shift|return|ulimit|unset|export|source|\.|if|for|select|while|until|then|else|fi|done|case|eval|alias/ in let word = /\$?[-A-Za-z0-9_.\/]+/ in let entry_eol = entry_eol_nocommand | entry_eol_item command in let entry_noeol = entry_noeol_nocommand | entry_item command in let entry = entry_eol | entry_noeol in let pipe = action_pipe (entry_eol_item command | entry_item command) in let and = action_and entry in let or = action_or entry in Util.indent . label "@command" . env* . store (word - reserved_key) . [ Sep.cl_or_space . label "@arg" . sto_to_semicol]? . ( pipe | and | or )? let entry_eol = entry_eol_nocommand | entry_eol_item command let entry_noeol = entry_noeol_nocommand | entry_item command (************************************************************************ * Group: CONDITIONALS AND LOOPS *************************************************************************) let generic_cond_start (start_kw:string) (lbl:string) (then_kw:string) (contents:lens) = keyword_label start_kw lbl . Sep.space . sto_to_semicol . ( action_and sto_to_semicol | action_or sto_to_semicol )* . semicol_eol . keyword then_kw . eol . contents let generic_cond (start_kw:string) (lbl:string) (then_kw:string) (contents:lens) (end_kw:string) = [ generic_cond_start start_kw lbl then_kw contents . keyword end_kw . comment_or_eol ] let cond_if (entry:lens) = let elif = [ generic_cond_start "elif" "@elif" "then" entry+ ] in let else = [ keyword_label "else" "@else" . eol . entry+ ] in generic_cond "if" "@if" "then" (entry+ . elif* . else?) "fi" let loop_for (entry:lens) = generic_cond "for" "@for" "do" entry+ "done" let loop_while (entry:lens) = generic_cond "while" "@while" "do" entry+ "done" let loop_until (entry:lens) = generic_cond "until" "@until" "do" entry+ "done" let loop_select (entry:lens) = generic_cond "select" "@select" "do" entry+ "done" let case (entry:lens) (entry_noeol:lens) = let pattern = [ label "@pattern" . sto_to_semicol . Sep.opt_space ] in let case_entry = [ label "@case_entry" . Util.indent . pattern . (Util.del_str "|" . Sep.opt_space . pattern)* . Util.del_str ")" . eol . entry* . entry_noeol? . Util.indent . Util.del_str ";;" . eol ] in [ keyword_label "case" "@case" . Sep.space . store (char+ | ("\"" . char+ . "\"")) . del /[ \t\n]+/ " " . Util.del_str "in" . eol . (empty* . comment* . case_entry)* . empty* . comment* . keyword "esac" . comment_or_eol ] let subshell (entry:lens) = [ Util.indent . label "@subshell" . Util.del_str "{" . brace_eol . entry+ . Util.indent . Util.del_str "}" . eol ] let function (entry:lens) (start_kw:string) (end_kw:string) = [ Util.indent . label "@function" . del /(function[ \t]+)?/ "" . store Rx.word . del /[ \t]*\(\)/ "()" . (comment_eol|brace_eol) . Util.del_str start_kw . brace_eol . entry+ . Util.indent . Util.del_str end_kw . eol ] let rec rec_entry = let entry = comment | entry_eol | rec_entry in cond_if entry | loop_for entry | loop_select entry | loop_while entry | loop_until entry | case entry entry_noeol | function entry "{" "}" | function entry "(" ")" | subshell entry let lns_norec = del_empty* . (comment | entry_eol) * let lns = del_empty* . (comment | entry_eol | rec_entry) * let sc_incl (n:string) = (incl ("/etc/sysconfig/" . n)) let sc_excl (n:string) = (excl ("/etc/sysconfig/" . n)) let filter_sysconfig = sc_incl "*" . sc_excl "anaconda" . sc_excl "bootloader" . sc_excl "hw-uuid" . sc_excl "hwconf" . sc_excl "ip*tables" . sc_excl "ip*tables.save" . sc_excl "kernel" . sc_excl "*.pub" . sc_excl "sysstat.ioconf" . sc_excl "system-config-firewall" . sc_excl "system-config-securitylevel" . sc_incl "network/config" . sc_incl "network/dhcp" . sc_incl "network/dhcp6r" . sc_incl "network/dhcp6s" . sc_incl "network/ifcfg-*" . sc_incl "network/if-down.d/*" . sc_incl "network/ifroute-*" . sc_incl "network/if-up.d/*" . sc_excl "network/if-up.d/SuSEfirewall2" . sc_incl "network/providers/*" . sc_excl "network-scripts" . sc_incl "network-scripts/ifcfg-*" . sc_excl "rhn" . sc_incl "rhn/allowed-actions/*" . sc_excl "rhn/allowed-actions/script" . sc_incl "rhn/allowed-actions/script/*" . sc_incl "rhn/rhnsd" . sc_excl "SuSEfirewall2.d" . sc_incl "SuSEfirewall2.d/cobbler" . sc_incl "SuSEfirewall2.d/services/*" . sc_excl "SuSEfirewall2.d/services/TEMPLATE" . sc_excl "*.systemd" let filter_default = incl "/etc/default/*" . excl "/etc/default/grub_installdevice*" . excl "/etc/default/rmt" . excl "/etc/default/star" . excl "/etc/default/whoopsie" . incl "/etc/profile" . incl "/etc/profile.d/*" . excl "/etc/profile.d/*.csh" . excl "/etc/profile.d/csh.local" let filter_misc = incl "/etc/arno-iptables-firewall/debconf.cfg" . incl "/etc/conf.d/*" . incl "/etc/cron-apt/config" . incl "/etc/environment" . incl "/etc/firewalld/firewalld.conf" . incl "/etc/blkid.conf" . incl "/etc/adduser.conf" . incl "/etc/cowpoke.conf" . incl "/etc/cvs-cron.conf" . incl "/etc/cvs-pserver.conf" . incl "/etc/devscripts.conf" . incl "/etc/kamailio/kamctlrc" . incl "/etc/lbu/lbu.conf" . incl "/etc/lintianrc" . incl "/etc/lsb-release" . incl "/etc/os-release" . incl "/etc/periodic.conf" . incl "/etc/popularity-contest.conf" . incl "/etc/rc.conf" . incl "/etc/rc.conf.d/*" . incl "/etc/rc.conf.local" . incl "/etc/selinux/config" . incl "/etc/ucf.conf" . incl "/etc/locale.conf" . incl "/etc/vconsole.conf" . incl "/etc/byobu/*" let filter = filter_sysconfig . filter_default . filter_misc . Util.stdexcl let xfm = transform lns filter (* Local Variables: *) (* mode: caml *) (* End: *)