Add comments to describe certain functions

Comments have been added to a couple of functions here and there
where I feel warrent some explanation. Hopefully this makes it a little
easier for people to contribute.

I commented on a couple of functions but my main focus is:
	DepTree
	DepCatagories
	StringSet
	Arguments

These are parts that have been mostly written by me and might seem
confusing without taking a while to study the code. Especially the first
two mentioned. They're a little complex, I'm not sure if they need to be
This is just how I came up with them. Hopefully helping other people
understand them will let them come up with improvments I did not see.
I'm not the best at explaining things but I did try my best here.

dependencies.go

@@ -43,12 +43,44 @@ func makeDependCatagories() *depCatagories {
 	return &dc
 }
 
+//cut the version requirement from a dependency leaving just the name
 func getNameFromDep(dep string) string {
 	return strings.FieldsFunc(dep, func(c rune) bool {
 		return c == '>' || c == '<' || c == '='
 	})[0]
 }
 
+//step two of dependency reloving. We already have all the information on the
+//packages we need, now it's just about ordering them correctly.
+//pkgs is a list of targets, the packages we want to install, dependencies not
+//included.
+//For each package we want we iterate down the tree until we hit the bottom.
+//This is done recursivley for each branch.
+//The start of the tree is defined as the package we want.
+//When we hit the bottom of the branch we know thats the first package
+//we need to install so we add it to the start of the to install
+//list (dc.Aur and dc.Repo).
+//We work our way up until there is another branch to go down and do it all
+//again.
+//
+//Here is a visual example
+//
+//      a
+//     / \
+//     b  c
+//    / \
+//   d   e
+//
+//we see a and it needs b and c
+//we see b and it needs d and e
+//we see d it needs nothing so we add d to our list and move up
+//we see e it needs nothing so we add e to our list and move up
+//we see c it needs nothign so we add c to our list and move up
+//
+//The final install order would come out as debca
+//
+//Theres a little more to this, handling provide, multiple packages wanting the
+//same dependencies and so on this is just the basic premise.
 func getDepCatagories(pkgs []string, dt *depTree) (*depCatagories, error) {
 	dc := makeDependCatagories()
 	seen := make(stringSet)
@@ -174,6 +206,36 @@ func depCatagoriesRecursive(_pkg *rpc.Pkg, dc *depCatagories, dt *depTree, isMak
 	}
 }
 
+//This is step one for dependency resolving. pkgs is a slice of the packages you
+//want to resolve the dependencioes for. They can be a mix of aur and repo
+//dependencies. All unmet dependencies will be resolved.
+//For Aur dependencies depends, makedepends and checkdepends are resolved but
+//for repo packages only depends are resolved as they are pre buiild.
+//The return will be split into three catagories. Repo, Aur and Missing.
+//The return is in no way ordered this step is is just aimed at gathering the
+//packaghes we need.
+//This has been designed to make the leat amount or rpc requests as possible.
+//Web requests are probably going to be the bottleneck here so minimizing them
+//provides a nice spead boost.
+//
+//Here is a visual expample of the request system.
+//Remember only unsatisfied packages are requested, if a package is already
+//installed we dont bother.
+//
+//      a
+//     / \
+//     b  c
+//    / \
+//   d   e
+//
+//We see a so we send a request for a
+//we see wants b and c so we send a request for b and c
+//we see d and e so we send a request for d and e
+//
+//Thats 5 packages in 3 requests.The amount of requests needed should always be
+//the same as the height of the tree.
+//The example does not really do this justice, In the real world where packages
+//have 10+ dependencies each this is a very nice optimization.
 func getDepTree(pkgs []string) (*depTree, error) {
 	dt := makeDepTree()
 

parser.go

@@ -7,6 +7,11 @@ import (
 	"strings"
 )
 
+//a basic set implementatrion for strings. this is used a lot so it deserves
+//its own type. Other types of sets are used throughout the code but tont have
+//their own typedef.
+//stringsets and <type>sets should be used throught the code when applicable,
+//they are a lot more flexable than slices and provide easy lookup,
 type stringSet map[string]struct{}
 
 func (set stringSet) set(v string) {
@@ -32,6 +37,8 @@ func (set stringSet) toSlice() []string {
 	return slice
 }
 
+//Parses command line arguments in a way we can interact with progamaticly but
+//also in a way that can easily be passed to pacman later on.
 type arguments struct {
 	op      string
 	options map[string]string

print.go

@@ -100,6 +100,9 @@ func (s repoQuery) printSearch() {
 	}
 }
 
+//pretty print a set of packages from the the same package base
+//packages foo and bar from a pkgbase named base would print like so
+//base (foo bar)
 func formatPkgbase(pkg *rpc.Pkg, bases map[string][]*rpc.Pkg) string {
 	str := pkg.PackageBase
 	if len(bases[pkg.PackageBase]) > 1 || pkg.PackageBase != pkg.Name {
@@ -305,6 +308,7 @@ func printUpdateList() error {
 	return nil
 }
 
+//formats a unix timestamp to yyy/m/d
 func formatTime(i int) string {
 	t := time.Unix(int64(i), 0)
 	return fmt.Sprintf("%d/%d/%d", t.Year(), int(t.Month()), t.Day())
@@ -366,6 +370,8 @@ func bold(in string) string {
 	return in
 }
 
+//colours text using a hashing algorithm the same text will always produce the
+//same colour while different text will produce a different colour
 func colourHash(name string) (output string) {
 	if alpmConf.Options&alpm.ConfColor == 0 {
 		return name

query.go

@@ -317,6 +317,11 @@ func min(a, b int) int {
 	return a
 }
 
+//Queriers the aur for information about specified packages
+//all packages should be queried in a single rpc request except when the number
+//of packages exceeds the number set in config.RequestSplitN
+//if the number does exceed config.RequestSplitN multiple rpc requests will be
+//preformed concurrently
 func aurInfo(names []string) ([]rpc.Pkg, error) {
 	info := make([]rpc.Pkg, 0, len(names))
 	seen := make(map[string]int)