1 files changed, 125 insertions, 0 deletions
diff --git a/src/config.nim b/src/config.nim
new file mode 100644
index 0000000..abcf376
--- /dev/null
+++ b/src/config.nim
@@ -0,0 +1,125 @@
+import
+  future, options, posix, re, sets, strutils, tables,
+  utils
+
+type
+  ColorMode* {.pure.} = enum
+    colorNever = "never",
+    colorAuto = "auto",
+    colorAlways = "always"
+
+  CommonConfig* = object of RootObj
+    dbs*: seq[string]
+    arch*: string
+    debug*: bool
+    progressBar*: bool
+    verbosePkgList*: bool
+    ignorePkgs*: HashSet[string]
+    ignoreGroups*: HashSet[string]
+
+  PacmanConfig* = object of CommonConfig
+    rootOption*: Option[string]
+    dbOption*: Option[string]
+    colorMode*: ColorMode
+
+  Config* = object of CommonConfig
+    root*: string
+    db*: string
+    tmpRoot*: string
+    color*: bool
+    aurComments*: bool
+    checkIgnored*: bool
+    printAurNotFound*: bool
+    viewNoDefault*: bool
+
+proc readConfigFile*(configFile: string):
+  (OrderedTable[string, ref Table[string, string]], bool) =
+  var file: File
+  var table = initOrderedTable[string, ref Table[string, string]]()
+  var category: ref Table[string, string]
+  var currentCategory = ""
+
+  let wasError = if file.open(configFile):
+      try:
+        var matches: array[2, string]
+
+        while true:
+          let rawLine = readLine(file).strip(leading = false, trailing = true)
+          let commentIndex = rawLine.find('#')
+          let line = if commentIndex >= 0:
+              rawLine[0 .. commentIndex - 1].strip(leading = false, trailing = true)
+            else:
+              rawLine
+
+          if line.len > 0:
+            if line.match(re"\[(.*)\]", matches):
+              currentCategory = matches[0]
+              if table.hasKey(currentCategory):
+                category = table[currentCategory]
+              else:
+                category = newTable[string, string]()
+                table[currentCategory] = category
+            elif currentCategory.len > 0:
+              if line.match(re"\ *(\w+)\ *=\ *(.*)", matches):
+                category[].add(matches[0], matches[1])
+              else:
+                category[].add(line.strip(leading = true, trailing = false), "")
+
+        false
+      except EOFError:
+        false
+      except IOError:
+        true
+      finally:
+        file.close()
+    else:
+      true
+
+  (table, wasError)
+
+proc ignored*(config: Config, name: string, groups: openArray[string]): bool =
+  name in config.ignorePkgs or (config.ignoreGroups * groups.toSet).len > 0
+
+proc isRootDefault*(config: Config): bool =
+  config.root == "/"
+
+proc get*(colorMode: ColorMode): bool =
+  case colorMode:
+    of ColorMode.colorNever: false
+    of ColorMode.colorAlways: true
+    of ColorMode.colorAuto: isatty(1) == 1
+
+proc root*(config: PacmanConfig): string =
+  config.rootOption.get("/")
+
+proc db*(config: PacmanConfig): string =
+  if config.dbOption.isSome:
+    config.dbOption.unsafeGet
+  else:
+    let root = config.root
+    let workRoot = if root == "/": "" else: root
+    workRoot & localStateDir & "/lib/pacman/"
+
+proc obtainConfig*(config: PacmanConfig): Config =
+  let (configTable, _) = readConfigFile(sysConfDir & "/pakku.conf")
+  let options = configTable.opt("options").map(t => t[]).get(initTable[string, string]())
+
+  let root = config.root
+  let db = config.db
+  let color = config.colorMode.get
+
+  let (userId, userName) = getUser()
+  let tmpRoot = options.opt("TmpDir").get("/tmp/pakku-${USER}")
+    .replace("${UID}", $userId)
+    .replace("${USER}", userName)
+  let aurComments = options.hasKey("AurComments")
+  let checkIgnored = options.hasKey("CheckIgnored")
+  let printAurNotFound = options.hasKey("PrintAurNotFound")
+  let viewNoDefault = options.hasKey("ViewNoDefault")
+
+  Config(root: root, db: db, tmpRoot: tmpRoot, color: color,
+    dbs: config.dbs, arch: config.arch, debug: config.debug,
+    progressBar: config.progressBar, verbosePkgList: config.verbosePkgList,
+    ignorePkgs: config.ignoreGroups, ignoreGroups: config.ignoreGroups,
+    aurComments: aurComments, checkIgnored: checkIgnored,
+    printAurNotFound: printAurNotFound, viewNoDefault: viewNoDefault)