Computercraft Github API

local args = {...}

--[[ Setting up variables ]]
local fileWriteOK
local url
local filename
local tArgs = { ... }


local function getHttpBody( url )
    http.request( url )

    while true do
        local event, url, hBody = os.pullEvent()
        if event == "http_success" then
            print( "HTTP SUCCESS\nURL = "..url )
            return hBody
        elseif event == "http_failure" then
            error( "HTTP FAILURE\nURL = "..url )    -- If the error is not catched, this will exit the program.
            return nil    -- In case this function is called via pcall.
        end
    end
end

local function processHttpBody( hBody, filename )
    local hFile

    if hBody then
        local body = hBody.readAll()    -- Read the whole body.
        hFile = io.open( filename, "w" )    -- Open the provided filename for writing.
        hFile:write( body )     -- Write the body to the file.
        hFile:close()   -- Save the changes and close the file.
    else
        print( "Sorry, no body to process." )
    end

    hBody.close()   -- Do not know for sure if this is really necessary, but just in case.
end

local function checkOverwrite( filename )
    term.setCursorBlink( false )
    print("\nWarning: File already exists. Overwrite? (Y/N)")

    while true do
        event, choice = os.pullEvent( "char" )  -- Only listen for "char" events.
        if string.lower( choice ) == "y" then return true end
        if string.lower( choice ) == "n" then return false end
    end
end


local function getRepoPointer()
    local handle = io.open("configs/git.config", "r")
    local username, repo
    if handle then
        username =  handle:read("l")
        repo =  handle:read("l")
        handle:close()
    end
    return username, repo
end

local function saveRepoConfig(username, repo)
    local handle = io.open("configs/git.config", "w")
    if handle then
        handle:write(username .. "\n")
        handle:write(repo .. "\n")
        handle:close()
        print("Set local repo config:")
        print(username .. "/" .. repo)
    else
        print("Failed to write to repo config")
    end
end

local function printUsage(fn)
    if not fn then
        --print base usage
        print("Usage:")
        print("git [repo | push | pull | run]")
    elseif fn == "repo" then
        --print usage for repo command
        print("Usage:")
        print("git repo <username> <repo>")
        print("Sets the local config file to point to a specific github repo")
    elseif fn == "pull" then
        --print usage for pull command
        print("Usage:")
        print("git pull <git filename> <local filename>")
        print("Downloads <git filename> from the repo in your local config")
        print("Saves this file to <local filename>")
    elseif fn == "push" then
        --print usage for push command
        print("git push is still a WIP")
    elseif fn == "run" then
        --print usage for run command
        print("Usage:")
        print("git run <git filename>")
        print("Downloads <git filename> from the repo in your local config")
        print("Runs this file without saving it")
    end
end

local function warnNoRepo()
    print("Missing repo pointer")
    print("First run \"git repo\" to set up")
    printUsage("repo")
end

local function makeGitURL(username, repo, filename)
    return "https://raw.githubusercontent.com/" .. username .. "/" .. repo .. "/main/" .. filename
end

if #args == 0 then
    printUsage()
elseif args[1] == "pull" then
    -- git pull <git file> <local file>?
    if #args == 2 or #args == 3 then
        username, repo = getRepoPointer()
        if not username then
            warnNoRepo()
        else
            --save to filename <args[3]> if provided, else <args[2]>
            processHttpBody(getHttpBody(makeGitURL(username, repo, args[2])), args[3] or args[2])
        end
    else
        printUsage("pull")
    end
elseif args[1] == "push" then
    -- git push <local file> <git file>
elseif args[1] == "run" then
    -- git run <git file>
elseif args[1] == "repo" then
    --git repo <username> <repository>
    --sets the pointer to the repo
    if #args == 3 then
        saveRepoConfig(args[2], args[3])
    else
        printUsage("repo")
    end
else
    --error, undefined command
    printUsage()
end