.gitignore

intellij-community
.DS_Store
*.png

extract_idea_logos.sh

#!/bin/bash
# execute in the cloned intellij-community edition git repo https://github.com/JetBrains/intellij-community.git
mkdir temp

filepath=community-resources/src/idea_community_logo.png
for sha in $(git log --format="%H" $filepath); do
  git show $sha:$filepath > temp/$sha.file
done

filepath=community-resources/src/idea_community_logo@2x.png
for sha in $(git log --format="%H" $filepath); do
  git show $sha:$filepath > temp/$sha.file
done

rakefile.rb

def git
  "git -C intellij-community"
end
task :default do
  [
    "community-resources/src/idea_community_logo.png",
    "community-resources/src/idea_community_logo@2x.png",
  ].map{|path|
    `#{git} log --format="%h@%cd" --date=format:'%Y-%m-%dT%H-%M-%S' #{path}`
      .split("\n")
      .map{|line|[path, line]}
  }.flatten(1).each {|path, line|
    sha, date = line.split("@")
    puts "#{path}: #{sha} #{date}"
    sh "#{git} show #{sha}:#{path} > #{date}.png"
  }
end