Adding also rpmlint reports:

---------------------

$ rpmlint -i SRPMS/vim-ctrlp-1.8.0-1.fc30.src.rpm 
vim-ctrlp.src: W: spelling-error Summary(en_US) mru -> mu, rum
The value of this tag appears to be misspelled. Please double-check.

vim-ctrlp.src: W: spelling-error %description -l en_US mru -> mu, rum
The value of this tag appears to be misspelled. Please double-check.

vim-ctrlp.src: W: spelling-error %description -l en_US gVim -> g Vim, grim, vim
The value of this tag appears to be misspelled. Please double-check.

vim-ctrlp.src: W: invalid-url Source0: vim-ctrlp-1.8.0.tar.gz
The value should be a valid, public HTTP, HTTPS, or FTP URL.

1 packages and 0 specfiles checked; 0 errors, 4 warnings.

---------------------

$ rpmlint -i RPMS/noarch/vim-ctrlp-1.8.0-1.fc30.noarch.rpm 
vim-ctrlp.noarch: W: spelling-error Summary(en_US) mru -> mu, rum
The value of this tag appears to be misspelled. Please double-check.

vim-ctrlp.noarch: W: spelling-error %description -l en_US mru -> mu, rum
The value of this tag appears to be misspelled. Please double-check.

vim-ctrlp.noarch: W: spelling-error %description -l en_US gVim -> g Vim, grim, vim
The value of this tag appears to be misspelled. Please double-check.

1 packages and 0 specfiles checked; 0 errors, 3 warnings.

---------------------

That mru spelling error in the description should IMO refer to most recently used which is correct abbreviation. The description was however taken unchanged from the upstream:

http://ctrlpvim.github.io/ctrlp.vim/

 - Source0 must be a url pointing to the archive

Source0:        https://github.com/ctrlpvim/ctrlp.vim/archive/%{version}/%{name}-%{version}.tar.gz

 - Version is 1.80, not 1.8.0

 - Appdata dir is the obsolete location, Appdata files now go in %{_metainfodir}

 - Add vim-filesystem as a RR too

Requires:       vim-filesystem

Thank you very much for the review!

(In reply to Robert-André Mauchin from comment #2)
>  - Source0 must be a url pointing to the archive
> 
> Source0:       
> https://github.com/ctrlpvim/ctrlp.vim/archive/%{version}/%{name}-%{version}.
> tar.gz

I updated Source0 and also Source1 (hope I am not too eager) to URLs instead of file system paths.

>  - Version is 1.80, not 1.8.0

I corrected the version number. I have to admit that I was confused by the upstream since they use to use X.Y.Z versions but switched to X.YZ for some reason. You are right that I should respect their version notation. 

>  - Appdata dir is the obsolete location, Appdata files now go in
> %{_metainfodir}

Directory for appdata files was also corrected according to your suggestion.
 
>  - Add vim-filesystem as a RR too
> 
> Requires:       vim-filesystem

The requirements were updated also.


The complete list of changes is at

https://copr-dist-git.fedorainfracloud.org/cgit/osoukup/ctrlp.vim/vim-ctrlp.git/diff/vim-ctrlp.spec

Additionally follows the links to updated COPR and KOJI builds

https://copr.fedorainfracloud.org/coprs/osoukup/ctrlp.vim/build/929280/
https://koji.fedoraproject.org/koji/taskinfo?taskID=35450870

Additionally the following warning is no more produced by rpmlint:

vim-ctrlp.src: W: invalid-url Source0: vim-ctrlp-1.8.0.tar.gz
The value should be a valid, public HTTP, HTTPS, or FTP URL.

 - Why -c? This break the build

%setup -cq

 Use:

%autosetup -n ctrlp.vim-%{version}

 - There's no LICENSE file in the archive.

+ cp -pr LICENSE /builddir/build/BUILDROOT/vim-ctrlp-1.80-1.fc31.x86_64/usr/share/licenses/vim-ctrlp
BUILDSTDERR: cp: cannot stat 'LICENSE': No such file or directory
+ :
+ exit 0
BUILDSTDERR: error: File not found: /builddir/build/BUILDROOT/vim-ctrlp-1.80-1.fc31.x86_64/usr/share/licenses/vim-ctrlp/LICENSE

 Add it as another source from GH or consider packaging a snapshot version of the master branch.

%global commit 2e773fd8c7548526853fff6ee2e642eafbbe3d04
%global shortcommit %(c=%%{commit}; echo ${c:0:7})
%global snapshotdate 20190610

Name:           vim-ctrlp
Version:        1.80
Release:        1.%{snapshotdate}git%{shortcommit}%{?dist}
Summary:        Full path fuzzy file, buffer, mru, tag, ... finder for Vim

License:        Vim
URL:            https://github.com/ctrlpvim/ctrlp.vim
Source0:        https://github.com/ctrlpvim/ctrlp.vim/archive/%{commit}/%{name}-%{shortcommit}.tar.gz

[…]

%autosetup -n ctrlp.vim-%{commit}

[…]

* Tue Feb 26 2019 Ondřej Soukup <osoukup> - 1.80-1.20190610git2e773fd

Hey Ondrej,

I sponsored you to the packagers group.

Let me know if you need any assistance with review made by eclipseo.

(In reply to Igor Gnatenko from comment #6)
> Hey Ondrej,
> 
> I sponsored you to the packagers group.
> 
> Let me know if you need any assistance with review made by eclipseo.

Thank you very much Igor! I am also thankful to Robert-André for his reviews. After his last comment I tried to incorporate his suggestions in various ways but I am still just struggling with it without any success. I at least understood some of my previous mistakes like building from my own modified archive instead of the upstream one.

I was first trying to stick with version-directed approach which I was using previously. The farthest I got was to various LICENSE install errors and got stuck with it. I am not sure how to install it. I was not able to find some example or documentation which would work for me.

Now I am investigating the second suggested commit-oriented approach. Simple copy-pasting ended up with invalid spec file so now I am learning it and trying to solve what is the correct working way of using it.

I am doing this my little packaging adventure in my free time and cannot find more than couple of hours for it every week so I am proceeding quite slowly. Moreover, I feel most of my last tries ended up as a waste of time investigating blind ways.

So as soon as I wrote down all these despair here things finally moved forward! I used commit-based approach as suggested by Robert-André - thank you - which works like a charm. I just had to first find out an unrelated typo of mine which made me think it does not work so straightforward...

Here are the changes

https://github.com/osoukup/ctrlp.vim/commit/2afc0feca05dbf86d4fc233b34951056b42b1163

and here are the new builds

https://copr.fedorainfracloud.org/coprs/osoukup/ctrlp.vim/build/944205/
https://koji.fedoraproject.org/koji/taskinfo?taskID=35793933

Thank you both once again!

LGTM, package approved.

(In reply to Robert-André Mauchin from comment #9)
> LGTM, package approved.

Thank you for the detailed review and lot of advice!

(fedscm-admin):  The Pagure repository was created at https://src.fedoraproject.org/rpms/vim-ctrlp

FEDORA-2019-11d543f05f has been submitted as an update to Fedora 30. https://bodhi.fedoraproject.org/updates/FEDORA-2019-11d543f05f

vim-ctrlp-1.80-1.20190610git2e773fd.fc30 has been pushed to the Fedora 30 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2019-11d543f05f

vim-ctrlp-1.80-1.20190610git2e773fd.fc30 has been pushed to the Fedora 30 stable repository. If problems still persist, please make note of it in this bug report.