Separate downloading and installation

bootstrap.lua

@@ -0,0 +1,47 @@
+-- Easy installer. Bootstrapped by http://pastebin.com/p8PJVxC4
+
+local base_url, dest = select(1,...)
+dest = dest or 'computercraft-github'
+
+print("Downloading from %s":format(base_url))
+
+local FILES = {
+	'apis/dkjson',
+	'apis/github',
+	'programs/github',
+	'github'
+}
+
+local function request(url_path)
+	local request = http.get(base_url..'/'..url_path)
+	local status = request.getResponseCode()
+	local response = request.readAll()
+	request.close()
+	return status, response
+end
+
+local function makeFile(file_path, data)
+	local file = fs.open(dest..'/'..file_path,'w')
+	file.write(data)
+	file.close()
+end
+
+-- download github
+for key, path in pairs(FILES) do
+	local try = 0
+	repeat
+		local status, response
+		if try >= 3 then
+			printError(('Unable to download %s - status of %s'):format(path, status))
+			printError(response)
+			fs.delete(dest)
+			return
+		end
+		status, response = request(path)
+		try = try + 1
+	until status ~= 200
+end
+
+print('Downloaded')
+shell.setDir(dest)
+loadfile('install.lua', getfenv())()

install

@@ -0,0 +1,28 @@
+-- Install the program by rewriting dofiles, and creating a link to the program
+
+local dest_dir = shell.resolve(select(..., 1) or '_build')
+
+print("Installing to %s...":format(dest_dir))
+
+local copyAndFix(src_file, src_file)
+	local r = fs.open(src_file, 'r')
+	local data = r.readAll()
+	r.close()
+	local w = fs.open(dest, 'w')
+	data = data:gsub('dofile%("', 'dofile("'..dest_dir..'/')
+	w.write(data)
+	w.close()
+end
+
+for _, folder in ipairs({'api', 'programs'})
+	for _, file in pairs(fs.list(folder)) do
+		copyAndFix(folder..'/'..file, dest_dir..'/'..folder..'/'..file)
+	end
+end
+
+for _, prog in pairs(fs.list('programs')) do
+	local f = fs.open('/'..prog, 'w')
+	f.write([[loadfile('%s', getfenv())(...)]]:format(dest_dir..'/programs/'..prog))
+end
+print("github by Eric Wieser installed!")
+dofile('github')

readme.md

@@ -7,10 +7,18 @@ Installation
 ------------
 The easiest way to install this project on your computercraft computer is by running:
 
-    pastebin run p8PJVxC4 [<branch>|<tag>]
+    pastebin run zDAQHQdz [<branch>|<tag>]
 
 The branch or tag argument is optional, and defaults to 'master'.
 
+### Updates
+
+To update an existing installation, do:
+
+    > github clone eric-wieser/computercraft-github .
+    ...
+    > install
+
 Usage
 -----
 
@@ -23,15 +31,16 @@ The destination folder is optional, and defaults to the current folder name. Wat
     > github clone eric-wieser/computercraft-github ccgit
     Discovering files...
     Downloading:
-      github
       readme.md
       apis/dkjson
       apis/github
       programs/github
+      install
+      bootstrap.lua
     [============================================] 100%
     > ls ccgit
     apis      programs
-    github readme.md
+    readme.md bootstrap.lua
 
 ---