77require 'rexml/document'
88require 'open3' # [macOS]
99require 'json' # [macOS]
10+ require 'tmpdir' # [macOS]
1011
1112HERMES_GITHUB_URL = "https://github.com/facebook/hermes.git"
1213ENV_BUILD_FROM_SOURCE = "RCT_BUILD_HERMES_FROM_SOURCE"
@@ -175,8 +176,18 @@ def podspec_source_build_from_github_tag(react_native_path)
175176end
176177
177178def podspec_source_build_from_github_main ( )
178- hermes_log ( "Using the latest commit from main." )
179- return { :git => HERMES_GITHUB_URL , :commit => `git ls-remote #{ HERMES_GITHUB_URL } . strip }
179+ # hermes_log("Using the latest commit from main.")
180+ # return {:git => HERMES_GITHUB_URL, :commit => `git ls-remote #{HERMES_GITHUB_URL} main | cut -f 1`.strip}
181+
182+ # [macOS
183+ # The logic for this is a bit different on macOS.
184+ # Since react-native-macos lags slightly behind facebook/react-native, we can't always use
185+ # the latest Hermes commit because Hermes and JSI don't always guarantee backwards compatibility.
186+ # Instead, we take the commit hash of Hermes at the time of the merge base with facebook/react-native.
187+ commit = hermes_commit_at_merge_base ( )
188+ hermes_log ( "Using Hermes commit from the merge base with facebook/react-native: #{ commit } )
189+ return { :git => HERMES_GITHUB_URL , :commit => commit }
190+ # macOS]
180191end
181192
182193def podspec_source_download_prebuild_release_tarball ( react_native_path , version )
@@ -199,6 +210,51 @@ def artifacts_dir()
199210 return File . join ( Pod ::Config . instance . project_pods_root , "hermes-engine-artifacts" )
200211end
201212
213+ # [macOS
214+ def hermes_commit_at_merge_base ( )
215+ # We don't need ls-remote because react-native-macos is a fork of facebook/react-native
216+ fetch_result = `git fetch -q https://github.com/facebook/react-native.git`
217+ if $?. exitstatus != 0
218+ abort <<-EOS
219+ [Hermes] Failed to fetch facebook/react-native into the local repository.
220+ EOS
221+ end
222+
223+ merge_base = `git merge-base FETCH_HEAD HEAD` . strip
224+ if merge_base . empty?
225+ abort <<-EOS
226+ [Hermes] Unable to find the merge base between our HEAD and upstream's HEAD.
227+ EOS
228+ end
229+
230+ timestamp = `git show -s --format=%ci #{ merge_base } . strip
231+ if timestamp . empty?
232+ abort <<-EOS
233+ [Hermes] Unable to extract the timestamp for the merge base (#{ merge_base }
234+ EOS
235+ end
236+
237+ commit = nil
238+ Dir . mktmpdir do |tmpdir |
239+ hermes_git_dir = File . join ( tmpdir , "hermes.git" )
240+ # Unfortunately we can't use git rev-list on HERMES_GITHUB_URL directly since we're not in that repo.
241+ # Instead, we create a shallow clone to avoid downloading the entire history.
242+ `git clone -q --bare --shallow-since="#{ timestamp } #{ HERMES_GITHUB_URL } #{ hermes_git_dir }
243+ `git --git-dir="#{ hermes_git_dir }
244+
245+ # If all goes well, this will be the commit hash of Hermes at the time of the merge base
246+ commit = `git --git-dir="#{ hermes_git_dir } #{ timestamp } . strip
247+ if commit . empty?
248+ abort <<-EOS
249+ [Hermes] Unable to find the Hermes commit hash at time #{ timestamp }
250+ EOS
251+ end
252+ end
253+
254+ return commit
255+ end
256+ # macOS]
257+
202258def hermestag_file ( react_native_path )
203259 return File . join ( react_native_path , "sdks" , ".hermesversion" )
204260end
@@ -236,15 +292,20 @@ def resolve_url_redirects(url)
236292 return ( `curl -Ls -o /dev/null -w %{url_effective} \" #{ url } \" ` )
237293end
238294
239- # [macOS react-native-macos does not publish macos specific hermes artifacts
240- # so we attempt to find the latest patch version of the iOS artifacts and use that
241- def findLastestVersionWithArtifact ( version )
242- # See https://central.sonatype.org/search/rest-api-guide/ for details on query params
243- versionWithoutPatch = "#{ version . match ( /^(\d +\. \d +)/ ) }
244- res , = Open3 . capture3 ( "curl -s https://search.maven.org/solrsearch/select?q=g:com.facebook.react+AND+a:react-native-artifacts+AND+v:#{ versionWithoutPatch } )
245- wt = JSON . parse ( res )
246- response = wt [ 'response' ]
247- return response [ 'docs' ] [ 0 ] [ 'v' ] unless response [ 'numFound' ] == 0
295+ # [macOS
296+ # Tries to find a suitable Hermes version for a given react-native-macos package.
297+ # For stable branches, we prefer this to be specified as a peer dependency.
298+ def findMatchingHermesVersion ( package )
299+ if package [ 'version' ] == "1000.0.0"
300+ # The main branch builds from source, so skip this check
301+ return nil
302+ end
303+
304+ if package [ 'peerDependencies' ]
305+ return package [ 'peerDependencies' ] [ 'react-native' ]
306+ end
307+
308+ hermes_log ( "No matching Hermes version found. Defaulting to main branch, which may be unreliable." )
248309end
249310# macOS]
250311
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