1 files changed, 47 insertions, 0 deletions
diff --git a/copy b/copy
new file mode 100755
index 0000000..ecd371b
--- /dev/null
+++ b/copy
@@ -0,0 +1,47 @@
+#!/bin/sh
+
+# Usage: echo "text" | copy [register]
+# Example: echo "Hello" | copy a
+
+TARGET_REG=$1
+RAW_INPUT=$(cat)
+B64_TEXT=$(echo "$RAW_INPUT" | base64 | tr -d '\n')
+
+# 1. Validate Register (Must be a single letter a-z or A-Z)
+# This prevents malicious or malformed register names.
+if [ -n "$TARGET_REG" ]; then
+    if ! echo "$TARGET_REG" | grep -q '^[a-zA-Z]$'; then
+        echo "Error: Register must be a single letter [a-zA-Z]." >&2
+        exit 1
+    fi
+
+    # 2. Update Neovim Register via internal Lua decoder
+    if [ -n "$NVIM" ]; then
+        # <C-\><C-N> ensures we are in Normal mode.
+        # 'i' at the end returns us to Terminal-Insert mode.
+        nvim --server "$NVIM" --remote-send \
+            "<C-\><C-N>:lua vim.fn.setreg('$TARGET_REG', vim.base64.decode('$B64_TEXT'))<CR>i"
+    fi
+fi
+
+# 3. Dynamic TTY Detection (Fixes stale SSH_TTY in Tmux)
+if [ -n "$TMUX" ]; then
+    OUTPUT=$(tmux display-message -p '#{client_tty}')
+elif [ -n "$SSH_TTY" ]; then
+    OUTPUT="$SSH_TTY"
+else
+    OUTPUT="/dev/stdout"
+fi
+
+# 4. Send OSC 52 Sequence to the Terminal
+if [ -n "$TMUX" ]; then
+    # Double-wrapped for Tmux passthrough (DCS)
+    printf "\033Ptmux;\033\033]52;c;%s\007\033\\" "$B64_TEXT" > "$OUTPUT"
+elif [ -n "$NVIM" ]; then
+    # Wrapped for Neovim terminal passthrough
+    printf "\033P\033]52;c;%s\007\033\\" "$B64_TEXT" > "$OUTPUT"
+else
+    # Standard OSC 52
+    printf "\033]52;c;%s\007" "$B64_TEXT" > "$OUTPUT"
+fi
+