Add default-editor subpackage (#1854444)

Reference: https://fedoraproject.org/wiki/Changes/UseNanoByDefault

nano-default-editor.csh

@@ -0,0 +1,5 @@
+# Ensure GNU nano is set as EDITOR if it isn't already set
+
+if ( ! ($?EDITOR) ) then
+	setenv EDITOR "/usr/bin/nano"
+endif

nano-default-editor.fish

@@ -0,0 +1,8 @@
+# Ensure GNU nano is set as EDITOR if it isn't already set
+# This is set as a universal variable so that any other definition
+# by the user would win
+# Cf. https://fishshell.com/docs/current/index.html#variables-scope
+
+if ! set -q EDITOR;
+	set -Ux EDITOR /usr/bin/nano
+end

nano-default-editor.sh

@@ -0,0 +1,5 @@
+# Ensure GNU nano is set as EDITOR if it isn't already set
+
+if [ -z "$EDITOR" ]; then
+	export EDITOR="/usr/bin/nano"
+fi

nano.spec

@@ -1,12 +1,17 @@
 Summary:         A small text editor
 Name:            nano
 Version:         4.9.3
-Release:         1%{?dist}
+Release:         2%{?dist}
 License:         GPLv3+
 URL:             https://www.nano-editor.org
 Source:          https://www.nano-editor.org/dist/latest/%{name}-%{version}.tar.xz
 Source2:         nanorc
 
+# Shell snippets for default-editor setup
+Source11:        nano-default-editor.sh
+Source12:        nano-default-editor.csh
+Source13:        nano-default-editor.fish
+
 BuildRequires:   file-devel
 BuildRequires:   gettext-devel
 BuildRequires:   gcc
@@ -20,6 +25,15 @@ Conflicts:       filesystem < 3
 %description
 GNU nano is a small and friendly text editor.
 
+%package default-editor
+Summary:         Sets GNU nano as the default editor
+Requires:        nano = %{version}-%{release}
+BuildArch:       noarch
+
+%description default-editor
+This package ensures the EDITOR shell variable
+is set in common shells to GNU nano.
+
 %prep
 %autosetup -S git
 
@@ -53,6 +67,11 @@ install -m 0644 ./nanorc %{buildroot}%{_sysconfdir}/nanorc
 
 %find_lang %{name}
 
+# install nano-default-editor snippets
+install -Dpm 0644 %{SOURCE11} %{buildroot}%{_sysconfdir}/profile.d/%{basename:%{S:11}}
+install -Dpm 0644 %{SOURCE12} %{buildroot}%{_sysconfdir}/profile.d/%{basename:%{S:12}}
+install -Dpm 0644 %{SOURCE13} %{buildroot}%{_datadir}/fish/vendor_conf.d/%{basename:%{S:13}}
+
 %files -f build/%{name}.lang
 %doc AUTHORS COPYING ChangeLog INSTALL NEWS README THANKS TODO
 %doc build/doc/sample.nanorc
@@ -63,7 +82,17 @@ install -m 0644 ./nanorc %{buildroot}%{_sysconfdir}/nanorc
 %{_infodir}/nano.info*
 %{_datadir}/nano
 
+%files default-editor
+%dir %{_sysconfdir}/profile.d
+%config(noreplace) %{_sysconfdir}/profile.d/nano-default-editor.*
+%dir %{_datadir}/fish/vendor_conf.d
+%{_datadir}/fish/vendor_conf.d/nano-default-editor.fish
+
+
 %changelog
+* Thu Jul 16 2020 Neal Gompa <ngompa13@gmail.com> - 4.9.3-2
+- Add default-editor subpackage (#1854444)
+
 * Mon May 25 2020 Kamil Dudka <kdudka@redhat.com> - 4.9.3-1
 - new upstream release