add new create-release-pr command (#12)

Justfile

@@ -3,8 +3,62 @@ set dotenv-load := true
 @_default:
     just --list
 
-generate-example DATA_FILE:
-    rye run copier copy . {{ trim_end_match(DATA_FILE, '.yml') }} --force --data-file {{ DATA_FILE }}
+# ----------------------------------------------------------------------
+# RELEASING
+# ----------------------------------------------------------------------
+
+create-release-pr:
+    #!/usr/bin/env bash
+
+    set -euo pipefail
+
+    # get changes since last tag for PR body
+    # done first so none of the other commits in this script are included
+    changes=$(git log $(git tag --sort=-creatordate | head -n 1)..HEAD --pretty=format:"- `%h`: %s")
+
+    # grab the newest version for release branch name and example generation commit message
+    new_version=$(just _bump --dry 2>&1 | rg 'New Version' | awk '{print $5}')
+
+    release_branch="release-v${new_version}"
+    git checkout -b "${release_branch}"
+
+    just _bump
+    # grab the PR title from the `bumpver` commit message
+    pr_title=$(git log -1 --pretty=%s)
+
+    just generate-examples
+    git add . && git commit -m "regenerate examples for version ${new_version}"
+
+    repo_url=$(git remote get-url origin)
+    changelog="CHANGELOG.md"
+    # update unrelease section with new version and add new unreleased section
+    sed -i -e "0,/## \[Unreleased\]/s//## [${new_version}]/" $changelog
+    sed -i -e "/## \[${new_version}\]/i ## [Unreleased]\n\n" $changelog
+    # adjust link references at bottom of changelog
+    echo -e "[${new_version}]: ${repo_url}/releases/tag/v${new_version}\n" >> $changelog
+    sed -i -e "s|\[unreleased\]: ${repo_url}/compare/v.*...HEAD|\[unreleased\]: ${repo_url}/compare/v${new_version}...HEAD|" $changelog
+    git add . && git commit -m "update CHANGELOG"
+
+    git push --set-upstream origin "${release_branch}"
+
+    gh pr create --base main --head "${release_branch}" --title "${pr_title}" --body "${changes}"
+
+_bump *ARGS:
+    rye run bumpver update {{ ARGS }}
+
+@generate-examples:
+    for file in `ls examples/*.yml`; do \
+        just _generate-example $file; \
+    done
+
+_generate-example DATA_FILE:
+    #!/usr/bin/env bash
+
+    set -euo pipefail
+
+    DIRECTORY="{{ trim_end_match(DATA_FILE, '.yml') }}"
+    rm -rf $DIRECTORY
+    rye run copier copy -r HEAD . $DIRECTORY --force --trust --data-file {{ DATA_FILE }}
 
 # ----------------------------------------------------------------------
 # UTILS