/deploy: respect the i686: prefix of PR titles

To allow for building i686 packages that are no longer built by the
MSYS2 project, let's establish the paradigm that Pull Requests whose
titles start with `i686:` are to be deployed only to the 32-bit flavor
of the Git for Windows Pacman repository.

Note: Since it is not customary to specifically point out each and every
such i686 build in the release notes, this commit does not take care of
`getMissingDeployments()` nor of the `/add relnote` command.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

GitForWindowsHelper/slash-commands.js

@@ -188,7 +188,7 @@ module.exports = async (context, req) => {
 
             const toTrigger = []
             if (isMSYSPackage(package_name)) {
-                if (package_name !== 'msys2-runtime-3.3') {
+                if (package_name !== 'msys2-runtime-3.3' && !req.body.issue.title.startsWith('i686:')) {
                     toTrigger.push(
                         { architecture: 'x86_64' }
                     )

__tests__/index.test.js

@@ -118,6 +118,9 @@ let mockGitHubApiRequest = jest.fn((_context, _token, method, requestPath, paylo
     if (method === 'GET' && requestPath.endsWith('/pulls/96')) return {
         head: { sha: 'b7b0dfc' }
     }
+    if (method === 'GET' && requestPath.endsWith('/pulls/153')) return {
+        head: { sha: 'b197f8f' }
+    }
     if (method === 'GET' && requestPath.endsWith('/pulls/4322')) return {
         head: { sha: 'c8edb521bdabec14b07e9142e48cab77a40ba339' }
     }
@@ -525,6 +528,28 @@ The workflow run [was started](dispatched-workflow-build-and-deploy.yml).`)
     expect(dispatchedWorkflows.map(e => e.payload.inputs.architecture)).toEqual(['aarch64'])
 })
 
+testIssueComment('/deploy libkbsa', {
+    issue: {
+        number: 153,
+        title: 'i686: build newest version of libksba, because gnupg requires at least v1.6.3',
+        body: 'I just tried to deploy gnupg v2.4.4 but it failed in the deploy-i686 job because of an outdated libksba package. We used to benefit from MSYS2\'s updates, but for the i686 variant there are no more updates of the MSYS packages, therefore we have to build it ourselves now.',
+        pull_request: {
+            html_url: 'https://github.com/git-for-windows/MSYS2-packages/pull/153'
+        }
+    },
+    repository: {
+        name: 'MSYS2-packages'
+    }
+}, async (context) => {
+    expect(await index(context, context.req)).toBeUndefined()
+    expect(context.res.body).toEqual(`I edited the comment: appended-comment-body-existing comment body
+
+The workflow run [was started](dispatched-workflow-build-and-deploy.yml).`)
+    expect(mockQueueCheckRun).toHaveBeenCalledTimes(1)
+    expect(mockUpdateCheckRun).toHaveBeenCalledTimes(1)
+    expect(dispatchedWorkflows.map(e => e.payload.inputs.architecture)).toEqual(['i686'])
+})
+
 const missingURL = 'https://wingit.blob.core.windows.net/x86-64/mingw-w64-x86_64-git-lfs-3.4.0-1-any.pkg.tar.xz'
 const mockDoesURLReturn404 = jest.fn(url => url === missingURL)
 jest.mock('../GitForWindowsHelper/https-request', () => {