[PATCH net-next 2/7] tools: ynl: cli: wrap the doc text if it's long

[Jakub Kicinski <kuba@kernel.org>]

We already use textwrap when printing "doc" section about an attribute,
but only to indent the text. Switch to using fill() to split and indent
all the lines. While at it indent the text by 2 more spaces, so that it
doesn't align with the name of the attribute.

Before (I'm drawing a "box" at ~60 cols here, in an attempt for clarity):

 |  - irq-suspend-timeout: uint                              |
 |    The timeout, in nanoseconds, of how long to suspend irq|
 |processing, if event polling finds events                  |

After:

 |  - irq-suspend-timeout: uint                              |
 |      The timeout, in nanoseconds, of how long to suspend  |
 |      irq processing, if event polling finds events        |

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 tools/net/ynl/pyynl/cli.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/tools/net/ynl/pyynl/cli.py b/tools/net/ynl/pyynl/cli.py
index aa50d42e35ac..e5e71ee4e133 100755
--- a/tools/net/ynl/pyynl/cli.py
+++ b/tools/net/ynl/pyynl/cli.py
@@ -10,6 +10,7 @@ import json
 import os
 import pathlib
 import pprint
+import shutil
 import sys
 import textwrap
 
@@ -101,7 +102,14 @@ RELATIVE_SCHEMA_DIR='../../../../Documentation/netlink'
                 attr_info += f" -> {nested_set_name}"
 
             if attr.yaml.get('doc'):
-                doc_text = textwrap.indent(attr.yaml['doc'], prefix + '  ')
+                doc_prefix = prefix + ' ' * 4
+                if sys.stdout.isatty():
+                    term_width = shutil.get_terminal_size().columns
+                else:
+                    term_width = 80
+                doc_text = textwrap.fill(attr.yaml['doc'], width=term_width,
+                                         initial_indent=doc_prefix,
+                                         subsequent_indent=doc_prefix)
                 attr_info += f"\n{doc_text}"
             print(attr_info)
 
-- 
2.52.0