From cccd7052b8fdb7e8679673fcc27f366b2aeaa964 Mon Sep 17 00:00:00 2001
From: Manuel Barkhau <mbarkhau@gmail.com>
Date: Fri, 22 Feb 2019 10:40:31 +0100
Subject: [PATCH] update documentation

---
 README.md               | 15 ++++++++++++++-
 src/pycalver/rewrite.py |  2 +-
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 5190402..261cc28 100644
--- a/README.md
+++ b/README.md
@@ -147,7 +147,7 @@ src/mymodule_v*/__init__.py =
     __version__ = "{pycalver}"
 README.md =
     [PyCalVer {calver}{build}{release}]
-    img.shields.io/badge/PyCalVer-{calver}{build}-{release}-blue
+    img.shields.io/static/v1.svg?label=PyCalVer&message={pycalver}&color=blue
 ```
 
 To see if a pattern is found, you can use `pycalver bump --dry`, which will
@@ -188,6 +188,19 @@ INFO    - New Version: v201902.0002-beta
      license="MIT",
 ```
 
+If there is no match for a pattern, bump will report an error.
+
+```shell
+$ pycalver bump --dry --no-fetch
+INFO    - Old Version: v201901.0001-beta
+INFO    - New Version: v201902.0002-beta
+ERROR   - No match for pattern 'img.shields.io/static/v1.svg?label=PyCalVer&message={pycalver}&color=blue'
+ERROR   - Pattern compiles to regex 'img\.shields\.io/static/v1\.svg\?label=PyCalVer&message=(?P<pycalver>v(?P<year>\d{4})(?P<month>(?:0[0-9]|1[0-2]))\.(?P<bid>\d{4,})(?:-(?P
+<tag>(?:alpha|beta|dev|rc|post|final)))?)&color=blue'
+```
+
+The internally used regular expression is also shown, which you can use to debug the issue, for example on https://regex101.com.
+
 
 ### Pattern Search and Replacement
 
diff --git a/src/pycalver/rewrite.py b/src/pycalver/rewrite.py
index e41a063..771ea38 100644
--- a/src/pycalver/rewrite.py
+++ b/src/pycalver/rewrite.py
@@ -72,7 +72,7 @@ def rewrite_lines(
             log.error(f"No match for pattern '{non_matched_pattern}'")
             compiled_pattern = patterns._compile_pattern(non_matched_pattern)
             log.error(f"Pattern compiles to regex '{compiled_pattern}'")
-        raise ValueError("Invalid pattern(s)", list(non_matched_patterns))
+        raise ValueError("Invalid pattern(s)")
     else:
         return new_lines