From 558977cc38369653e618a70a9bf900cd1e926173 Mon Sep 17 00:00:00 2001
From: Miro Hrončok <miro@hroncok.cz>
Date: Jun 15 2020 10:46:23 +0000
Subject: Add pkgname helper


Fixes https://pagure.io/fedora-packager/issue/162

Suggestion by Adam in https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/message/N444O6WJKADAQN77A4Y5KNBUH2543LAD/

Signed-off-by: Miro Hrončok <miro@hroncok.cz>

Consider this script public domain, hence the license of fedora-packager is not affected.

---

diff --git a/.gitignore b/.gitignore
index e0a10f8..5248390 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,6 +13,7 @@ fedora-cvs
 .project
 .pydevproject
 *.pyc
+pkgname
 py-compile
 /src/pyrpkg/*.py*
 *~
diff --git a/Makefile.am b/Makefile.am
index 05c7bae..c65cd48 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -3,6 +3,7 @@ bin_SCRIPTS = \
 	fedora-cert \
 	fedora-getsvn \
 	fedora-hosted \
+	pkgname \
 	rpmbuild-md5 \
 	s390-koji \
 	stg-koji
@@ -17,6 +18,7 @@ EXTRA_DIST = \
 	src/fedora-getsvn \
 	src/fedora-hosted.py \
 	src/fedora-burn-yubikey.py \
+	src/pkgname.py \
 	src/rpmbuild-md5 \
 	src/secondary-koji
 
@@ -40,6 +42,10 @@ fedora-burn-yubikey: $(srcdir)/src/fedora-burn-yubikey.py
 	rm -f fedora-burn-yubikey
 	install -p -m 755 -T $(srcdir)/src/fedora-burn-yubikey.py fedora-burn-yubikey
 
+pkgname: $(srcdir)/src/pkgname.py
+	rm -f pkgname
+	install -p -m 755 -T $(srcdir)/src/pkgname.py pkgname
+
 rpmbuild-md5: $(srcdir)/src/rpmbuild-md5
 	rm -f rpmbuild-md5
 	install -p -m 755 -T $(srcdir)/src/rpmbuild-md5 rpmbuild-md5
diff --git a/src/pkgname.py b/src/pkgname.py
new file mode 100644
index 0000000..eb0ad3a
--- /dev/null
+++ b/src/pkgname.py
@@ -0,0 +1,32 @@
+#!/usr/bin/python3
+"""
+Pipe package NEVRAs into this script to get package names.
+
+NEVRA stands for Name, Epoch, Version, Release, Architecture. E.g.:
+
+    $ echo fedora-packager-0:0.6.0.4-1.fc32.noarch | pkgname
+    fedora-packager
+
+You can omit epoch and/or architecture:
+
+    $ echo fedora-packager-0.6.0.4-1.fc32 | pkgname
+    fedora-packager
+
+But, if version and release is omitted, the script can produce invalid results:
+
+    $ echo fedora-packager | pkgname
+    fedora
+
+Created by Miro Hrončok, with suggestions from Adam Williamson.
+
+This script is trivial, consider it Public Domain.
+"""
+import fileinput
+import sys
+
+
+if len(sys.argv) > 1:
+    sys.exit(__doc__.strip())
+
+for line in fileinput.input():
+    print(line.rsplit("-", 2)[0])