gnu: Add python-xmp-toolkit.

* gnu/packages/python-xyz.scm (python-xmp-toolkit): New variable.
* gnu/packages/patches/python-xmp-toolkit-add-missing-error-codes.patch:
New file.
* gnu/local.mk (dist_patch_DATA): Add it.

Change-Id: Ibce05155961eb5ba199754646e08acff2410f95d
Co-authored-by: Ludovic Courtès <ludo@gnu.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/gnu/packages/patches/python-xmp-toolkit-add-missing-error-codes.patch b/gnu/packages/patches/python-xmp-toolkit-add-missing-error-codes.patch
new file mode 100644
index 0000000000..17bdae188f
--- /dev/null
+++ b/gnu/packages/patches/python-xmp-toolkit-add-missing-error-codes.patch
@@ -0,0 +1,51 @@
+From fd9e887a1853d9b4bc3fce20d414d648fb5abbfc Mon Sep 17 00:00:00 2001
+From: Asher Glick <asher.glick@gmail.com>
+Date: Mon, 1 Mar 2021 14:35:46 -0600
+Subject: [PATCH] Add missing error codes and graceful handling of possible
+ future missing codes.
+
+---
+ libxmp/exempi.py | 14 +++++++++++++-
+ 1 file changed, 13 insertions(+), 1 deletion(-)
+
+diff --git a/libxmp/exempi.py b/libxmp/exempi.py
+index 683e240..f58003c 100644
+--- a/libxmp/exempi.py
++++ b/libxmp/exempi.py
+@@ -85,6 +85,7 @@ ERROR_MESSAGE = {    0: "unknown error",
+                    -13: "std exception",
+                    -14: "unknown exception",
+                    -15: "no memory",
++                   -16: "progress abort",
+                   -101: "bad schema",
+                   -102: "bad XPath",
+                   -103: "bad options",
+@@ -95,6 +96,14 @@ ERROR_MESSAGE = {    0: "unknown error",
+                   -108: "bad file format",
+                   -109: "no file handler",
+                   -110: "too large for JPEG",
++                  -111: "no file",
++                  -112: "file permission error",
++                  -113: "disk space",
++                  -114: "read error",
++                  -115: "write error",
++                  -116: "bad block format",
++                  -117: "file path not a file",
++                  -118: "rejected file extension",
+                   -201: "bad XML",
+                   -202: "bad RDF",
+                   -203: "bad XMP",
+@@ -1697,6 +1706,9 @@ def check_error(success):
+     # so we supplement it by explicitly checking the error code.
+     ecode = EXEMPI.xmp_get_error()
+     if not success or ecode != 0:
+-        error_msg = ERROR_MESSAGE[ecode]
++        if ecode in ERROR_MESSAGE:
++            error_msg = ERROR_MESSAGE[ecode]
++        else:
++            error_msg = "Unexpected error code " + str(ecode)
+         msg = 'Exempi function failure ("{0}").'.format(error_msg)
+         raise XMPError(msg)
+-- 
+2.30.2
+