git status peek in prompt for clink

git.lua

---
 -- Find out current branch
 -- @return {false|git branch name}
---
function get_git_branch()
    for line in io.popen("git branch 2>nul"):lines() do
        local m = line:match("%* (.+)$")
        if m then
            return m
        end
    end

    return false
end

---
 -- Get the status of working dir
 -- @return {bool}
---
function get_git_status()

    local status = {
        anyChanges = false,
        indexAdded = 0,
        indexModified = 0,
        indexDeleted = 0,
        filesAdded = 0,
        filesModified = 0,
        filesDeleted = 0
    }
    
    for line in io.popen("git -c color.status=false status --short 2>nul"):lines() do
        if line:match("^A(.+)$") then status.indexAdded = status.indexAdded + 1 end
        if line:match("^M(.+)$") then status.indexModified = status.indexModified + 1 end
        if line:match("^R(.+)$") then status.indexModified = status.indexModified + 1 end
        if line:match("^C(.+)$") then status.indexModified = status.indexModified + 1 end
        if line:match("^D(.+)$") then status.indexDeleted = status.indexDeleted + 1 end

        if line:match("^%?(.+)$") then status.filesAdded = status.filesAdded + 1 end
        if line:match("^ A(.+)$") then status.filesAdded = status.filesAdded + 1 end
        if line:match("^ M(.+)$") then status.filesModified = status.filesModified + 1 end
        if line:match("^ R(.+)$") then status.filesModified = status.filesModified + 1 end
        if line:match("^ C(.+)$") then status.filesModified = status.filesModified + 1 end
        if line:match("^ D(.+)$") then status.filesDeleted = status.filesDeleted + 1 end

        status.anyChanges = true
    end    

    return status

end

function git_prompt_filter()

    -- Colors for git status
    local colors = {
        clean = "\x1b[1;37;40m",
        red = "\x1b[31;1m",
        green = "\x1b[32;1m",
    }

    local branch = get_git_branch()
    if branch then
        -- Has branch => therefore it is a git folder, now figure out status
        
        local status = get_git_status()
        
        if not status.anyChanges then
            clink.prompt.value = string.gsub(clink.prompt.value, "{git}", colors.clean.."("..branch..")")
        else
            -- for k,v in pairs(status) do print(k,v) end
            clink.prompt.value = string.gsub(clink.prompt.value, "{git}", string.format("%s(%s %s+%d ~%d -%d%s | %s+%d ~%d -%d%s)", 
                colors.clean, 
                branch, 
                colors.green,
                status.indexAdded, 
                status.indexModified, 
                status.indexDeleted, 
                colors.clean, 
                colors.red, 
                status.filesAdded, 
                status.filesModified, 
                status.filesDeleted, 
                colors.clean))
        end

        
        return true
    end

    -- No git present or not in git file
    clink.prompt.value = string.gsub(clink.prompt.value, "{git}", "")
    return false
end

clink.prompt.register_filter(git_prompt_filter, 50)