Added new lenses for future use.

1 files changed, 39 insertions, 0 deletions

diff --git a/lenses/packagemask.aug b/lenses/packagemask.aug
new file mode 100644
index 0000000..b61c215
--- /dev/null
+++ b/lenses/packagemask.aug
@@ -0,0 +1,39 @@
+(* Parsing /etc/portage/package.mask *)
+
+(*
+  It is still far from perfect, but at least it doesn't give "ambiguous concat"
+  anymore and work for packages without digits in package name.
+*)
+
+module Packagemask =
+  autoload xfm
+
+  let sep_spc = Util.del_ws_spc
+  let sep_tab = Util.del_ws_tab
+
+  let eol = del /[ \t]*\n/ "\n"
+  let indent = del /[ \t]*/ ""
+
+  let comment = Util.comment
+  let empty   = [ del /[ \t]*#?[ \t]*\n/ "\n" ]
+
+  let operator = /[<>]?=?/
+
+  let package = /[a-z_\/-]+([a-z0-9_\/-]*[a-z_-])?/
+  let version = /[0-9]+(\.[0-9]+)*(-r[0-9]+)?/
+  let sep_version = del /-/ "-"
+
+  let word = /[^#<>= \n\t]+/
+
+  let record = [ seq "packagemask" . indent
+    . [ label "operator" . store operator ]
+    . [ label "package" . store package ]
+    . [ sep_version . label "version" . store version ]?
+    . (comment|eol)
+    ]
+
+  let lns = ( empty | comment | record ) *
+
+  let filter = (incl "/etc/portage/package.mask")
+    . (incl "/etc/portage/package.mask/*")
+  let xfm = transform lns filter