gh-133447: Add basic color to sqlite3 CLI

Lib/sqlite3/__main__.py

@@ -10,9 +10,14 @@
 from argparse import ArgumentParser
 from code import InteractiveConsole
 from textwrap import dedent
+import _colorize as colorize
 
+def _clr(color, use_color):
+    if use_color:
+        return color
+    return ''
 
-def execute(c, sql, suppress_errors=True):
+def execute(c, sql, suppress_errors=True, use_color=False):
     """Helper that wraps execution of SQL code.
 
     This is used both by the REPL and by direct execution from the CLI.
@@ -25,22 +30,27 @@ def execute(c, sql, suppress_errors=True):
         for row in c.execute(sql):
             print(row)
     except sqlite3.Error as e:
+        theme = colorize.get_theme(force_color=True).traceback
         tp = type(e).__name__
         try:
-            print(f"{tp} ({e.sqlite_errorname}): {e}", file=sys.stderr)
+            print(f"{_clr(theme.type, use_color)}{tp} ({e.sqlite_errorname})"
+                  f"{_clr(theme.reset, use_color)}: "
+                  f"{_clr(theme.message, use_color)}{e}{_clr(theme.reset, use_color)}", file=sys.stderr)
         except AttributeError:
-            print(f"{tp}: {e}", file=sys.stderr)
+            print(f"{_clr(theme.type, use_color)}{tp}{_clr(theme.reset, use_color)}: "
+                  f"{_clr(theme.message, use_color)}{e}{_clr(theme.reset, use_color)}", file=sys.stderr)
         if not suppress_errors:
             sys.exit(1)
 
 
 class SqliteInteractiveConsole(InteractiveConsole):
     """A simple SQLite REPL."""
 
-    def __init__(self, connection):
+    def __init__(self, connection, use_color=False):
         super().__init__()
         self._con = connection
         self._cur = connection.cursor()
+        self._use_color = use_color
 
     def runsource(self, source, filename="<input>", symbol="single"):
         """Override runsource, the core of the InteractiveConsole REPL.
@@ -58,7 +68,7 @@ def runsource(self, source, filename="<input>", symbol="single"):
             case _:
                 if not sqlite3.complete_statement(source):
                     return True
-                execute(self._cur, source)
+                execute(self._cur, source, use_color=self._use_color)
         return False
 
 
@@ -105,8 +115,12 @@ def main(*args):
         Each command will be run using execute() on the cursor.
         Type ".help" for more information; type ".quit" or {eofkey} to quit.
     """).strip()
-    sys.ps1 = "sqlite> "
-    sys.ps2 = "    ... "
+
+    use_color = colorize.can_colorize()
+    theme = colorize.get_theme(force_color=True).syntax
+
+    sys.ps1 = f"{_clr(theme.prompt, use_color)}sqlite> {_clr(theme.reset, use_color)}"
+    sys.ps2 = f"{_clr(theme.prompt, use_color)}    ... {_clr(theme.reset, use_color)}"
 
     con = sqlite3.connect(args.filename, isolation_level=None)
     try:
@@ -115,7 +129,7 @@ def main(*args):
             execute(con, args.sql, suppress_errors=False)
         else:
             # No SQL provided; start the REPL.
-            console = SqliteInteractiveConsole(con)
+            console = SqliteInteractiveConsole(con, use_color)
             try:
                 import readline  # noqa: F401
             except ImportError:

Lib/test/test_sqlite3/test_cli.py

@@ -9,6 +9,7 @@
     captured_stderr,
     captured_stdin,
     force_not_colorized,
+    force_not_colorized_test_class,
 )
 
 
@@ -69,6 +70,7 @@ def test_cli_on_disk_db(self):
         self.assertIn("(0,)", out)
 
 
+@force_not_colorized_test_class
 class InteractiveSession(unittest.TestCase):
     MEMORY_DB_MSG = "Connected to a transient in-memory database"
     PS1 = "sqlite> "
@@ -158,6 +160,14 @@ def test_interact_on_disk_file(self):
         out, _ = self.run_cli(TESTFN, commands=("SELECT count(t) FROM t;",))
         self.assertIn("(0,)\n", out)
 
+    def test_color(self):
+        with unittest.mock.patch("_colorize.can_colorize", return_value=True):
+            out, err = self.run_cli(commands="\n")
+            self.assertIn("\x1b[1;35msqlite> \x1b[0m", out)
+            self.assertIn("\x1b[1;35m    ... \x1b[0m\x1b", out)
+            out, err = self.run_cli(commands=("sel;",))
+            self.assertIn('\x1b[1;35mOperationalError (SQLITE_ERROR)\x1b[0m: '
+                          '\x1b[35mnear "sel": syntax error\x1b[0m', err)
 
 if __name__ == "__main__":
     unittest.main()

Misc/NEWS.d/next/Library/2025-05-05-18-50-00.gh-issue-133447.ajshdb.rst

@@ -0,0 +1 @@
+Add basic color to :mod:`sqlite3` CLI interface.