regular backup

home-manager/home.nix

@@ -14,8 +14,8 @@ in {
   nixpkgs.config.allowUnfree = true;
   # Home Manager needs a bit of information about you and the paths it should
   # manage.
-  home.username = "user";
+  home.username = "nixos";
-  home.homeDirectory = "/home/user";
+  home.homeDirectory = "/home/nixos";
   xdg.enable = true;
 
   targets.genericLinux.enable = true;
@@ -34,13 +34,17 @@ in {
     };
     ".gitconfig" = {
       text = ''
+        [core]
+          sshCommand = ssh.exe
         [user]
           email = arielherself@duck.com
           name = arielherself
         [gpg "ssh"]
-          program = ${pkgs._1password-gui}/bin/op-ssh-sign
+          program = "/mnt/c/Users/user/AppData/Local/1Password/app/8/op-ssh-sign.exe"
         [safe]
           directory = /mnt/fdos_server/OS-24Fall-FDU
+        [credential]
+          helper = store
       '';
     };
     "Documents" = {
@@ -50,6 +54,9 @@ in {
   };
 
   xdg.configFile = {
+    "ptool/ptool.toml" = {
+      source = "${config.home.homeDirectory}/Dropbox/arch/ptool.toml";
+    };
     "nixpkgs/config.nix" = {
       source = ../nixpkgs-config.nix;
     };
@@ -83,6 +90,15 @@ in {
       source = ../nvim;
       recursive = true;
     };
+    "nvim/ftplugin/java.lua" = {
+      text = ''
+        local config = {
+          cmd = {'${pkgs.jdt-language-server}/bin/jdtls'},
+          root_dir = vim.fs.dirname(vim.fs.find({'gradlew', '.git', 'mvnw'}, { upward = true })[1]),
+        }
+        require('jdtls').start_or_attach(config)
+      '';
+    };
     "p10k/p10k.zsh" = {
       source = ../p10k.zsh;
       recursive = true;
@@ -91,21 +107,21 @@ in {
 
   xdg.desktopEntries = {
     # Don't forget to change its permissions.
-    cider = {
+    # cider = {
-      name = "Cider";
+    #   name = "Cider";
-      comment = "Apple Music Player";
+    #   comment = "Apple Music Player";
-      type = "Application";
+    #   type = "Application";
-      exec = "${pkgs.appimage-run}/bin/appimage-run ${config.home.homeDirectory}/Dropbox/arch/cider/Cider-linux-appimage-x64.AppImage";
+    #   exec = "${pkgs.appimage-run}/bin/appimage-run ${config.home.homeDirectory}/Dropbox/arch/cider/Cider-linux-appimage-x64.AppImage";
-      terminal = false;
+    #   terminal = false;
-      categories = [ "AudioVideo" "Audio" ];
+    #   categories = [ "AudioVideo" "Audio" ];
-    };
+    # };
-    thorium = {
+    # thorium = {
-      name = "Thorium (AppImage)";
+    #   name = "Thorium (AppImage)";
-      comment = "Access the Internet";
+    #   comment = "Access the Internet";
-      type = "Application";
+    #   type = "Application";
-      exec = "${pkgs.appimage-run}/bin/appimage-run ${config.home.homeDirectory}/Dropbox/arch/thorium/Thorium.AppImage";
+    #   exec = "${pkgs.appimage-run}/bin/appimage-run ${config.home.homeDirectory}/Dropbox/arch/thorium/Thorium.AppImage";
-      terminal = false;
+    #   terminal = false;
-    };
+    # };
   };
 
   # This value determines the Home Manager release that your configuration is
@@ -123,13 +139,14 @@ in {
     # Terminal
     # pkgs.contour
     # pkgs.tmux
-    pkgs.kitty
+    # pkgs.kitty
-    pkgs.alacritty
+    # pkgs.alacritty
 
     # Networking
-    pkgs.wireshark
+    # pkgs.wireshark
     # pkgs.clash-verge-rev
     mypkgs.aria2
+    pkgs.qbittorrent-nox
 
     # Editor
     unstable.neovim
@@ -145,8 +162,8 @@ in {
     pkgs.nodePackages.prettier
     unstable.markdown-oxide
     pkgs.helix
-    unstable.zed-editor
+    # unstable.zed-editor
-    pkgs.xfce.mousepad
+    # pkgs.xfce.mousepad
 
     # Tools
     pkgs.zip
@@ -163,20 +180,20 @@ in {
     pkgs.mtr
     pkgs.htop
     pkgs.gdb
-    mypkgs.dropbox
+    # mypkgs.dropbox
     pkgs.brightnessctl
     pkgs.psmisc
     pkgs.xclip                                 # Clipboard support
-    pkgs.vulkan-tools
+    # pkgs.vulkan-tools
     pkgs.lshw                                  # Hardware info
-    unstable._1password
+    # unstable._1password
-    unstable._1password-gui
+    # unstable._1password-gui
     pkgs.nix-index
     pkgs.rclone
     pkgs.sshfs
-    pkgs.usbutils
+    # pkgs.usbutils
-    pkgs.udiskie
+    # pkgs.udiskie
-    pkgs.udisks
+    # pkgs.udisks
 
     # Pwn
     pkgs.nmap
@@ -185,6 +202,7 @@ in {
 
     # Java
     pkgs.jdk22
+    pkgs.jdt-language-server
 
     # Python
     (pkgs.python312.withPackages (ps: with ps; [
@@ -200,49 +218,50 @@ in {
     # pkgs.waybar-mpris
 
     # Desktop management
-    pkgs.xfce.thunar
+    # pkgs.xfce.thunar
-    pkgs.baobab
+    # pkgs.baobab
     pkgs.dua                                   # CLI disk usage
-    pkgs.i3lock
+    # pkgs.i3lock
-    pkgs.flameshot
+    # pkgs.flameshot
 
     # Note & Documents
-    pkgs.obsidian
+    # pkgs.obsidian
-    pkgs.xournalpp
+    # pkgs.xournalpp
-    pkgs.sioyek
+    # pkgs.sioyek
 
     # Multimedia
-    pkgs.kdePackages.gwenview                  # Image viewer
+    # pkgs.kdePackages.gwenview                  # Image viewer
-    pkgs.vlc
+    # pkgs.vlc
     pkgs.playerctl
     pkgs.jellyfin-ffmpeg
-    pkgs.spotify
+    # pkgs.spotify
-    unstable.spotify-player
+    # unstable.spotify-player
 
     # Streaming
-    pkgs.obs-studio
+    # pkgs.obs-studio
 
     # Communication
-    pkgs.telegram-desktop
+    # pkgs.telegram-desktop
-    pkgs.discord
+    # pkgs.discord
 
     # Browser
-    pkgs.firefox-devedition
+    # pkgs.firefox-devedition
-    pkgs.chromium
+    # pkgs.chromium
-    mypkgs.thorium
+    # mypkgs.thorium
 
     # Misc
     pkgs.fastfetch
     pkgs.onefetch
     pkgs.lf                                    # Terminal file manager
+    pkgs.lsof
     pkgs.smassh                                # Typing test
     pkgs.you-get                               # YouTube video downloader
     pkgs.asciinema                             # Record terminal sessions
-    pkgs.ulauncher                             # application launcher
+    # pkgs.ulauncher                             # application launcher
-    pkgs.networkmanagerapplet                  # Network manager tray icon
+    # pkgs.networkmanagerapplet                  # Network manager tray icon
-    pkgs.cbatticon                             # Battery tray icon
+    # pkgs.cbatticon                             # Battery tray icon
-    pkgs.pavucontrol                           # Volume control
+    # pkgs.pavucontrol                           # Volume control
-      pkgs.pasystray                           # Volume tray icon
+    #   pkgs.pasystray                           # Volume tray icon
     pkgs.yaru-theme
     unstable.adwaita-icon-theme
     pkgs.adwaita-qt
@@ -251,13 +270,13 @@ in {
     pkgs.asciiquarium                          # Interesting
     pkgs.starship                              # Prompt bar
     pkgs.patchelf
-    pkgs.screenkey
+    # pkgs.screenkey
 
     # My version of BerkeleyMono NF is incomplete. Should add some fallback fonts.
-    (pkgs.nerdfonts.override { fonts = [
+    # (pkgs.nerdfonts.override { fonts = [
-      "JetBrainsMono"
+    #   "JetBrainsMono"
-      "FiraCode"
+    #   "FiraCode"
-    ]; })
+    # ]; })
 
     # # You can also create simple shell scripts directly inside your
     # # configuration. For example, this adds a command 'my-hello' to your
@@ -334,7 +353,7 @@ in {
       commit.gpgsign = true;
       gpg.format = "ssh";
       # This may not apply. Also try `git config --global gpg.ssh.program "/home/user/.nix-profile/bin/op-ssh-sign"`
-      gpg."ssh".program = "${unstable._1password-gui}/bin/op-ssh-sign";
+      # gpg."ssh".program = "${unstable._1password-gui}/bin/op-ssh-sign";
       push.autoSetupRemote = true;
       core.editor = "nvim";
     };
@@ -352,9 +371,13 @@ in {
     shell = "${pkgs.zsh}/bin/zsh";
     extraConfig = ''
       # Fix font variants and undercurl but optional.
-      # set -ga terminal-overrides ",xterm-256color:Tc"
+      set -ga terminal-overrides ",xterm-256color:Tc"
       # set-option -sa terminal-features ',xterm-256color:RGB'
-      # set-option -g default-terminal "tmux-256color"
+      # Fix Windows Terminal
+      set-option -g default-terminal "tmux-256color"
+      set-option -sa terminal-overrides ",xterm-256color:RGB"
+      set -as terminal-overrides ',*:Smulx=\E[4::%p1%dm'
+      set -as terminal-overrides ',*:Setulc=\E[58::2::%p1%{65536}%/%d::%p1%{256}%/%{255}%&%d::%p1%{255}%&%d%;m'
       # set-option -ga terminal-features ",xterm-256color:usstyle"
       # set -as terminal-overrides ',*:Smulx=\E[4::%p1%dm'
       # set -as terminal-overrides ',*:Setulc=\E[58::2::%p1%{65536}%/%d::%p1%{256}%/%{255}%&%d::%p1%{255}%&%d%;m'
@@ -373,7 +396,7 @@ in {
   };
 
   programs.wezterm = {
-    enable = true;
+    enable = false;
     enableZshIntegration = true;
     extraConfig = ''
       local config = wezterm.config_builder()
@@ -411,5 +434,23 @@ in {
   programs.home-manager = {
     enable = true;
   };
+
+  systemd.user.services.qbittorrent-nox = {
+    Unit = {
+      Description = "qBittorrent-nox service.";
+      # Wants = [ "network-online.target" ];
+      # After = [ "local-fs.target" "network-online.target" "nss-lookup.target" "multi-user.target" ];
+    };
+    Install = {
+      WantedBy = [ "default.target" ];
+    };
+    Service = {
+      Type = "simple";
+      PrivateTmp = "false";
+      ExecStart = "${pkgs.qbittorrent-nox}/bin/qbittorrent-nox";
+      TimeoutStopSec = 1800;
+      Restart = "always";
+    };
+  };
 }
 

nvim/lua/config.lua

@@ -1,5 +1,9 @@
 vim.cmd("set encoding=utf-8")
 vim.cmd("set exrc")
+vim.cmd("set undofile")
+vim.cmd("set undodir=~/.vim/undofiles")
+vim.cmd("set undolevels=10000")
+vim.cmd("set undoreload=50000")
 vim.cmd("filetype off")
 vim.cmd("set pumblend=40")
 vim.cmd("set winblend=40")
@@ -39,7 +43,7 @@ vim.diagnostic.config({
         focusable = false,
     },
 })
-vim.cmd([[au CursorHold * lua vim.diagnostic.open_float(0,{scope = "cursor"})]])
+-- vim.cmd([[au CursorHold * lua vim.diagnostic.open_float(0,{scope = "cursor"})]])
 vim.g.mapleader = " ";
 vim.filetype.add({
     extension = {
@@ -151,12 +155,12 @@ local plugins = {
     {
         'jdhao/better-escape.vim'  -- `jk` without causing `j` to have delay
     },
-    {
+    -- {
-        'Pocco81/auto-save.nvim',
+    --     'Pocco81/auto-save.nvim',
-        opts = {
+    --     opts = {
-            enabled = true,
+    --         enabled = true,
-        }
+    --     }
-    },
+    -- },
     {
         "windwp/nvim-autopairs",
         event = "InsertEnter",
@@ -485,6 +489,7 @@ local plugins = {
     },
     { 'NStefan002/screenkey.nvim' },
     { 'kosayoda/nvim-lightbulb' },
+    { 'mfussenegger/nvim-jdtls' },  -- Java LS
 }
 require("lazy").setup(plugins, {})
 
@@ -545,7 +550,7 @@ require('search').setup {
         },
     }
 }
-vim.keymap.set('n', '<leader>o', '<Cmd>lua require("search").open({ tab_name = "Smart Open" })<CR>')
+vim.keymap.set('n', '<leader>o', '<Cmd>lua require("search").open({ tab_name = "Files" })<CR>')
 vim.keymap.set('n', '<leader>f', '<Cmd>lua require("search").open({ tab_name = "Symbols" })<CR>')
 vim.keymap.set('n', '<leader>g', '<Cmd>lua require("search").open({ tab_name = "Grep" })<CR>')
 
@@ -654,7 +659,9 @@ lspconfig.clangd.setup {
     end,
     cmd = {
         "clangd",
-        -- "--header-insertion=never"
+        -- "--header-insertion=never",
+        "--clang-tidy",
+        "--clang-tidy-checks=*",
     }
 }
 lspconfig.pyright.setup {
@@ -787,6 +794,8 @@ vim.keymap.set('n', '<leader>x', require("mini.trailspace").trim, {noremap=true}
 vim.keymap.set('n', '<Del>', vim.notify.dismiss, {noremap=true})
 vim.keymap.set({'n', 'v', 'x'}, 'Q', 'q', {noremap=true})
 vim.keymap.set({'n', 'v', 'x'}, 'q', '<Nop>', {noremap=true})
+vim.keymap.set('n', 'g ', [[/\v^\s+$<CR>$<Cmd>nohlsearch<CR>]], {noremap=true, silent=true})
+vim.keymap.set('n', 'gy', "`[v`]", {noremap=true})
 
 vim.api.nvim_create_user_command('SearchInCurrentFile', function()
     vim.ui.input({ prompt = 'Grep ...'}, function(input)

nvim/lua/snippets/ebcc-with-mult.lua

@@ -0,0 +1,51 @@
+return [=[
+// INFO: This function treats vertex pairs that have multiple edges as eBCCs.
+//
+// Returns: (BCC count, indices of BCC of each vertex)
+//
+// BCC index starts from 1
+pair<int, vector<int>> ebcc_with_mult(const vector<vector<pii>>& ch) {
+    int n = ch.size() - 1;
+    vector<int> c(n + 1);
+
+    vector<int> low(n + 1), dfn(n + 1);
+    vector<bool> vis(n + 1);
+    vector<int> stack;
+
+    int time = 0;
+    int cnt = 0;
+
+    auto dfs = [&] (auto dfs, int v, int prev_idx) -> void {
+        low[v] = dfn[v] = ++time;
+        stack.emplace_back(v);
+        vis[v] = 1;
+        for (auto&& [u, i] : ch[v]) {
+            if (i == prev_idx) continue;
+            if (not dfn[u]) {
+                dfs(dfs, u, i);
+                chmin(low[v], low[u]);
+            } else if (vis[u]) {
+                chmin(low[v], dfn[u]);
+            }
+        }
+        if (dfn[v] == low[v]) {
+            cnt += 1;
+            c[v] = cnt;
+            while (stack.back() != v) {
+                c[stack.back()] = cnt;
+                vis[stack.back()] = 0;
+                stack.pop_back();
+            }
+            stack.pop_back();
+        }
+    };
+
+    for (int i = 1; i <= n; ++i) {
+        if (not dfn[i]) {
+            dfs(dfs, i, -1);
+        }
+    }
+    return { cnt, c };
+}
+
+]=]

nvim/lua/snippets/ebcc.lua

@@ -0,0 +1,51 @@
+return [=[
+// WARN: Input should be a simple graph
+//
+// Returns: (BCC count, indices of BCC of each vertex)
+//
+// BCC index starts from 1
+pair<int, vector<int>> ebcc(const vector<vector<int>>& ch) {
+    int n = ch.size() - 1;
+    vector<int> c(n + 1);
+
+    vector<int> low(n + 1), dfn(n + 1);
+    vector<bool> vis(n + 1);
+    vector<int> stack;
+
+    int time = 0;
+    int cnt = 0;
+
+    auto dfs = [&] (auto dfs, int v, int pa) -> void {
+        low[v] = dfn[v] = ++time;
+        stack.emplace_back(v);
+        vis[v] = 1;
+        for (auto&& u : ch[v]) {
+            if (u == pa) continue;
+            if (not dfn[u]) {
+                dfs(dfs, u, v);
+                chmin(low[v], low[u]);
+            } else if (vis[u]) {
+                chmin(low[v], dfn[u]);
+            }
+        }
+        if (dfn[v] == low[v]) {
+            cnt += 1;
+            c[v] = cnt;
+            while (stack.back() != v) {
+                c[stack.back()] = cnt;
+                vis[stack.back()] = 0;
+                stack.pop_back();
+            }
+            stack.pop_back();
+        }
+    };
+
+    for (int i = 1; i <= n; ++i) {
+        if (not dfn[i]) {
+            dfs(dfs, i, 0);
+        }
+    }
+    return { cnt, c };
+}
+
+]=]

nvim/lua/snippets/hash-vec.lua

@@ -74,7 +74,7 @@ struct range_hash {
     template <typename T>
     range_hash(const T& vec) {
         hp.emplace_back();
-        hash_vec<ll> hs(vec.size());
+        hash_vec<ll> hs(vec.size() + 1);
         for (auto&& x : vec) {
             hs.push_back(x);
             hp.emplace_back(hs.hash());

nvim/lua/snippets/init.lua

@@ -366,3 +366,42 @@ ls.add_snippets(nil, {
     }
 })
 
+local ebcc = require('snippets.ebcc')
+ls.add_snippets(nil, {
+    cpp = {
+        snip({
+            trig = 'ebcc',
+            namr = 'ebcc',
+            dscr = 'eBCC on simple undirected graph',
+        },{
+            text(lines(ebcc))
+        })
+    }
+})
+
+local ebcc_with_mult = require('snippets.ebcc-with-mult')
+ls.add_snippets(nil, {
+    cpp = {
+        snip({
+            trig = 'ebcc_with_mult',
+            namr = 'ebcc_with_mult',
+            dscr = 'eBCC on common undirected graph (with multiple edges)',
+        },{
+            text(lines(ebcc_with_mult))
+        })
+    }
+})
+
+local manacher = require('snippets.manacher')
+ls.add_snippets(nil, {
+    cpp = {
+        snip({
+            trig = 'manacher',
+            namr = 'manacher',
+            dscr = 'Manacher algorithm for counting palindrome substrings',
+        },{
+            text(lines(manacher))
+        })
+    }
+})
+

nvim/lua/snippets/manacher.lua

@@ -0,0 +1,31 @@
+return [=[
+template <typename T>
+vector<int> manacher(const vector<T>& s, const T& never) {
+    vector<T> t = { never };
+    for (auto&& c : s) {
+        t.emplace_back(c);
+        t.emplace_back(never);
+    }
+    int n = t.size();
+    vector<int> r(n);
+    for (int i = 0, j = 0; i < n; ++i) {
+        if (2 * j - i >= 0 && j + r[j] > i) {
+            r[i] = min(r[2 * j - i], j + r[j] - i);
+        }
+        while (i - r[i] >= 0 && i + r[i] < n && t[i - r[i]] == t[i + r[i]]) {
+            r[i] += 1;
+        }
+        if (i + r[i] > j + r[j]) {
+            j = i;
+        }
+    }
+    for (int i = 0; i < n; i += 2) {
+        r[i] = (r[i] - 1) / 2;
+    }
+    for (int i = 1; i < n; i += 2) {
+        r[i] /= 2;
+    }
+    return r;
+}
+
+]=]

nvim/lua/snippets/mcmf.lua

@@ -8,19 +8,15 @@ struct mcmf {
         int rev;
         int mark;
     };
-
     vector<vector<edge>> edges;
     vector<ll> dis;
     vector<bool> vis;
     ll ret;
-
     mcmf(int n) : edges(n + 1), dis(n + 1), vis(n + 1) {}
-
     void add_edge(int from, int to, ll cap, ll cost, int mark = 0, int mark_rev = 0) {
         edges[from].push_back({ to, cap, 0, cost, int(edges[to].size()), mark });
         edges[to].push_back({ from, 0, 0, -cost, int(edges[from].size() - 1), mark_rev });
     }
-
     bool sp(int s, int t) {
         dis.assign(edges.size(), INFLL);
         dis[s] = 0;
@@ -39,7 +35,6 @@ struct mcmf {
         }
         return dis[t] != INFLL;
     }
-
     ll dfs(int s, int t, ll cap) {
         if (vis[s]) {
             return 0;
@@ -65,7 +60,6 @@ struct mcmf {
         }
         return res;
     }
-
     // returns: (flow, cost)
     pll run(int s, int t) {
         ll res = 0; ret = 0;
@@ -73,6 +67,9 @@ struct mcmf {
             vis.assign(edges.size(), 0);
             ll curr = dfs(s, t, LLONG_MAX);
             res += curr;
+            // BUG: this is a temporary fix of the infinite-looping issue observed
+            // when dealing with networks with negative weights.
+            if (curr == 0) break;
         }
         return { res, ret };
     }

nvim/lua/snippets/sparse-table.lua

@@ -2,6 +2,7 @@ return [[
 template<typename _Tp, typename _Op = function<_Tp(const _Tp&, const _Tp&)>> struct sparse_table {
     _Op op;
     vector<vector<_Tp>> st;
+    sparse_table() {}
     template <typename ReverseIterator>
     sparse_table(ReverseIterator __first, ReverseIterator __last, _Op&& __operation) {
         op = __operation;