gnulib-tool.py: Display specified modules in bold.

[Collin Funk <collin.funk1@gmail.com>]

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I noticed that the bold printing was missing. One of the most important
changes I've made yet.

Collin

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From 95e3bf4e2d912ffc87889c72cff7119523bf081b Mon Sep 17 00:00:00 2001
From: Collin Funk <collin.funk1@gmail.com>
Date: Fri, 29 Mar 2024 06:09:20 -0700
Subject: [PATCH] gnulib-tool.py: Display specified modules in bold.

* pygnulib/GLImport.py (GLImport.prepare): Detect terminals starting
with 'xterm'. Change hexadecimal numbers to octal, matching
gnulib-tool.sh.
* pygnulib/GLTestDir.py (GLTestDir.execute): Likewise.
---
 ChangeLog             | 8 ++++++++
 pygnulib/GLImport.py  | 8 ++++----
 pygnulib/GLTestDir.py | 8 ++++----
 3 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 84a33eecb7..c6ac9f13a0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2024-03-29  Collin Funk  <collin.funk1@gmail.com>
+
+	gnulib-tool.py: Display specified modules in bold.
+	* pygnulib/GLImport.py (GLImport.prepare): Detect terminals starting
+	with 'xterm'. Change hexadecimal numbers to octal, matching
+	gnulib-tool.sh.
+	* pygnulib/GLTestDir.py (GLTestDir.execute): Likewise.
+
 2024-03-29  Bruno Haible  <bruno@clisp.org>
 
 	gnulib-tool.py: Don't print Makefile.am edits that are already done.
diff --git a/pygnulib/GLImport.py b/pygnulib/GLImport.py
index afe751dbd3..84e1c08689 100644
--- a/pygnulib/GLImport.py
+++ b/pygnulib/GLImport.py
@@ -849,10 +849,10 @@ AC_DEFUN([%s_FILE_LIST], [\n''' % macro_prefix
         if verbose >= 0:
             bold_on = ''
             bold_off = ''
-            term = os.getenv('TERM')
-            if term == 'xterm':
-                bold_on = '\x1b[1m'
-                bold_off = '\x1b[0m'
+            term = os.getenv('TERM', '')
+            if term.startswith('xterm') and os.isatty(1):
+                bold_on = '\033[1m'
+                bold_off = '\033[0m'
             print('Module list with included dependencies (indented):')
             for module in final_modules:
                 if str(module) in self.config.getModules():
diff --git a/pygnulib/GLTestDir.py b/pygnulib/GLTestDir.py
index 57fbef7b06..e395090b83 100644
--- a/pygnulib/GLTestDir.py
+++ b/pygnulib/GLTestDir.py
@@ -260,10 +260,10 @@ class GLTestDir(object):
         if verbose >= 0:
             bold_on = ''
             bold_off = ''
-            term = os.getenv('TERM')
-            if term == 'xterm':
-                bold_on = '\x1b[1m'
-                bold_off = '\x1b[0m'
+            term = os.getenv('TERM', '')
+            if term.startswith('xterm') and os.isatty(1):
+                bold_on = '\033[1m'
+                bold_off = '\033[0m'
             print('Module list with included dependencies (indented):')
             specified_modules_set = { str(module)
                                       for module in specified_modules }
-- 
2.44.0