From 75a936ef2975bc4032cb1262b946b89725fed1bc Mon Sep 17 00:00:00 2001
From: "dingfeng.wong" <dingfeng.wong@okg.com>
Date: Tue, 22 Jul 2025 14:55:54 +0800
Subject: [PATCH] a

---
 src/elf/better_bash.py | 70 ++++++++++++++++++++++++++++++++++++------
 1 file changed, 61 insertions(+), 9 deletions(-)

diff --git a/src/elf/better_bash.py b/src/elf/better_bash.py
index d0367d2..1e544d3 100644
--- a/src/elf/better_bash.py
+++ b/src/elf/better_bash.py
@@ -56,20 +56,72 @@ def build_ps1_prompt() -> str:
     
     return f'{green}{user_host} ($({local_ip_cmd})):{work_dir}{prompt_symbol} {reset}'
 
+# Alias building utilities
+def create_bash_function(func_name: str, func_body: str) -> str:
+    """
+    Creates a bash function with the given name and body.
+    The function body should be properly formatted bash code.
+    """
+    return f'{func_name}() {{\n{func_body}\n}}'
+
+def create_alias_with_function(alias_name: str, func_name: str, func_body: str) -> str:
+    """
+    Creates a bash alias that defines and immediately calls a function.
+    This pattern allows for complex logic within aliases.
+    """
+    function_def = create_bash_function(func_name, func_body)
+    return f"alias {alias_name}='{function_def}; {func_name}'"
+
+# File finding utilities
+def find_last_modified_file_command() -> str:
+    """
+    Returns a command that finds the last modified file in current directory.
+    Uses find with printf to get modification time, sorts by time, and gets the newest.
+    """
+    return 'find . -maxdepth 1 -type f -printf "%T@ %p\\0" | sort -znr | head -zn1 | cut -d" " -f2- --zero-terminated'
+
+def create_conditional_message(condition: str, success_msg: str, failure_msg: str) -> str:
+    """
+    Creates a bash conditional that shows different messages based on a condition.
+    """
+    return f'''if [ {condition} ]; then
+    {success_msg}
+  else
+    {failure_msg}
+  fi'''
+
+# Tail last modified file alias components
+def get_tail_last_logic() -> str:
+    """
+    Creates the logic for tailing the last modified file in current directory.
+    """
+    find_cmd = find_last_modified_file_command()
+    success_action = '''echo "Tailing: \\"$LAST_MODIFIED_FILE\\"";
+    tail "$@" "$LAST_MODIFIED_FILE"'''
+    failure_action = 'echo "No files found in the current directory to tail."'
+    
+    conditional = create_conditional_message(
+        '-n "$LAST_MODIFIED_FILE"',
+        success_action,
+        failure_action
+    )
+    
+    return f'''LAST_MODIFIED_FILE=$({find_cmd});
+  {conditional}'''
+
+def build_tail_last_alias() -> str:
+    """
+    Builds the 'tl' alias that tails the last modified file in current directory.
+    """
+    func_body = get_tail_last_logic()
+    return create_alias_with_function('tl', '_tl_func', func_body)
+
 better_env = f'''
 export TERM=xterm
 export PS1="{build_ps1_prompt()}"
 
 # Tail the last modified file in current directory
-alias tl='_tl_func() {{
-  LAST_MODIFIED_FILE=$(find . -maxdepth 1 -type f -printf "%T@ %p\0" | sort -znr | head -zn1 | cut -d" " -f2- --zero-terminated);
-  if [ -n "$LAST_MODIFIED_FILE" ]; then
-    echo "Tailing: \"$LAST_MODIFIED_FILE\"";
-    tail "$@" "$LAST_MODIFIED_FILE";
-  else
-    echo "No files found in the current directory to tail.";
-  fi
-}}; _tl_func'
+{build_tail_last_alias()}
 
 echo "Bash customizations sourced successfully!"
 '''