Get the title of a Pull Request from command line

Question

I'm writing a continuous integration step that checks the titles of our pull requests for proper tags and formatting before allowing them to be merged.

To do this, I need to echo the title of the Pull Request when given the PR number. Is there a way to do this simply in command line?

Answer 1

building off of @Simon-Warta's answer you can do the following:

git clone https://github.com/user_org/project.git
pushd project
for pr in $(git log --pretty="%s" --merges | grep pull | sed -e "s/.*#\([0-9]\+\).*/\1/g" | sort -rn | uniq); do
  curl https://api.github.com/repos/user_org/project/pulls/${pr} 2>/dev/null | jq '.title';
done
popd

You'll need curl and jq available on your machine but that shouldn't be hard if you have a reasonable linux distro..

Answer 2

With Github's new official CLI (command line interface):

gh pr view 3 --repo OWNER/REPO | head -n 1

where:

• 3 is the PR number
• gh pr view [options] displays the title (first line), body, and other information about the PR
• head -n 1 only keeps the first line of the gh pr view output in order to only get the title

See additional details and options and installation instructions.

Answer 3

Thanks Kevin Kreiser. My version of his solution without jq & only current commits from last tag.

TL;DR

instead

curl https://api.github.com/repos/user_org/project/pulls/${pr} 2>/dev/null | jq '.title';

use

curl https://api.github.com/repos/user_org/project/pulls/${pr} | grep title | cut -d'"' -f4

For CocoaHeadsRu repository example:

git clone https://github.com/cocoaheadsru/application.git  // clone the repository
cd application           // go to the application folder
touch getTitles.sh       // create file getTitles.sh
chmod a+x getTitles.sh   // make the file executable
vi getTitles.sh          // open the file in the vim text editor

add the following code to the getTitles.sh:

for pr in $(git log $(git describe --tags --abbrev=0)..HEAD --pretty="%s" --merges | cut -d' ' -f4 | cut -d'#' -f2 | tr '\n' ' ')
do
    curl https://api.github.com/repos/cocoaheadsru/application/pulls/${pr} | grep title | cut -d'"' -f4
done

save the code and exit the vim

:wq

Now we can create a release notes file using our script:

./getTitles.sh > ReleaseNotes.txt
cat ReleaseNotes.txt

// [qXUdCQay] Changed app build number, deleted MARKETING_VERSION and CU…
// Feature/kn vl5 eaw/add bluetooth always key
// [CQoos82f] Updated Realm, increment app version
// upgraded travis configuration
// Открытие места проведения митапа в 2ГИС
// Автокапитализация и технические улучшения
// Интеграция Travis-CI
// Postpone fetchEvents for main view after view appearing

Description script code:

1

git describe --tags --abbrev=0                  // get the last tag
git log $(git describe --tags --abbrev=0)..HEAD // get all commit from last tag to HEAD
[--//--] --pretty="%s"                          // all commits in one line
[--//--] --merges                               // merged commits only

2

break the string into parts using the space character and get 4th value

ex Merge pull request #347 from antonsergeev88/swipeToPop_crash

[--//--] cut -d' ' -f4      // get '#347'

3

break the string into parts using the '#' character and get 2nd value

ex #347

[--//--] cut -d'#' -f2      // get '347'

4

tr '\n' ' '                 // replaced '/n' with a space character

we get something like 355 354 353 352 350 349 348 347

5

In the loop using github api:

curl https://api.github.com/repos/cocoaheadsru/application/pulls/347

we get all pull requests in json-format. One of them:

{
  "url": "https://api.github.com/repos/cocoaheadsru/application/pulls/347",
  "id": 215781239,
  "number": 347,
  "state": "closed",
  ...
  "title": "Postpone fetchEvents for main view after view appearing",
  ...
  "user": {...},
  "merged_at": "2018-09-30T17:26:47Z",
  "merge_commit_sha": "553d8ea6f189882a22d424d0770785b53ddc4ab4",
  "commits": 1,
  ...
}

6

using grep

[--//--] | grep title

get a line with the word title:

"title": "Postpone fetchEvents for main view after view appearing",

7

using cut:

[--//--] | cut -d'"' -f4

finally we get only title value:

Postpone fetchEvents for main view after view appearing

Answer 4

If you are using github:

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
    fetch = +refs/heads/*:refs/remotes/origin/*
    url = [email protected]:a.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

[remote "origin"]
    fetch = +refs/heads/*:refs/remotes/origin/*
    url = [email protected]:a.git
    fetch = +refs/pull/*/head:refs/remotes/origin/pr/*

Now fetch all the pull requests:

$ git fetch origin
From github.com:ja
* [new ref]         refs/pull/1000/head -> origin/pr/1000
* [new ref]         refs/pull/1002/head -> origin/pr/1002
* [new ref]         refs/pull/1004/head -> origin/pr/1004
* [new ref]         refs/pull/1009/head -> origin/pr/1009

To check out a particular pull request:

$ git checkout pr/999
Branch pr/999 set up to track remote branch pr/999 from origin.
Switched to a new branch 'pr/999'

Answer 5

For pull requests use

https://api.github.com/repos/randombit/botan/pulls/359

For patches in a pull request, search for Subject: in the .patch url:

https://github.com/randombit/botan/pull/359.patch

Note that you can only do 60 request per hour and IP on the Github API.