Add release automation script.

RELEASING.md

@@ -1,9 +1,9 @@
 Releasing
 =========
 
-1. Update the version in Sources/Version.swift
-2. `git commit -am "Version X.Y.Z"`
-3. `git tag -a X.Y.Z -m "Version X.Y.Z"`
-4. `git push && git push --tags`
-5. Create a new github release at https://github.com/segmentio/analytics-swift/releases
-    * Summarize change history since last release in the notes.
+Use `release.sh` to perform releases.  This script will perform all the safety checks as well
+as update Version.swfit, commit the change, and create tag + release.  History since the last
+released version will be used as the changelog for the release.
+
+ex: $ ./release.sh 1.1.1
+

Sources/Segment/Version.swift

@@ -7,5 +7,12 @@
 
 // Referred to by Analytics.swift
 
+// DO NOT MODIFY THIS FILE BY HAND!!
+// DO NOT MODIFY THIS FILE BY HAND!!
+// DO NOT MODIFY THIS FILE BY HAND!!
+// DO NOT MODIFY THIS FILE BY HAND!!
+
+// Use release.sh's automation.
+
 // BREAKING.FEATURE.FIX
 internal let __segment_version = "1.0.1"

release.sh

@@ -0,0 +1,110 @@
+#!/bin/bash
+
+vercomp () {
+	if [[ $1 == $2 ]]
+	then
+		return 0
+	fi
+	local IFS=.
+	local i ver1=($1) ver2=($2)
+	# fill empty fields in ver1 with zeros
+	for ((i=${#ver1[@]}; i<${#ver2[@]}; i++))
+	do
+		ver1[i]=0
+	done
+	for ((i=0; i<${#ver1[@]}; i++))
+	do
+		if [[ -z ${ver2[i]} ]]
+		then
+			# fill empty fields in ver2 with zeros
+			ver2[i]=0
+		fi
+		if ((10#${ver1[i]} > 10#${ver2[i]}))
+		then
+			return 1
+		fi
+		if ((10#${ver1[i]} < 10#${ver2[i]}))
+		then
+			return 2
+		fi
+	done
+	return 0
+}
+
+# check if `gh` tool is installed.
+if ! command -v gh &> /dev/null
+then
+	echo "Github CLI tool is required, but could not be found."
+	echo "Install it via: $ brew install gh"
+	exit 1
+fi
+
+# check that we're on the `main` branch
+branch=$(git rev-parse --abbrev-ref HEAD)
+if [ branch != 'main' ] 
+then
+	echo "The 'main' branch must be the current branch out to make a release."
+	echo "You are currently on: $branch"
+	exit 1
+fi
+
+versionFile="./sources/Segment/Version.swift"
+
+# get last line in version.swift
+versionLine=$(tail -n 1 $versionFile)
+# split at the =
+version=$(cut -d "=" -f2- <<< "$versionLine")
+# remove quotes and spaces
+version=$(sed "s/[' \"]//g" <<< "$version")
+
+echo "Analytics-Swift current version: $version"
+
+# no args, so give usage.
+if [ $# -eq 0 ] 
+then
+	echo "Release automation script"
+	echo ""
+	echo "Usage: $ ./release.sh <version>"
+	echo "   ex: $ ./release.sh \"1.0.2\""
+	exit 0
+fi
+
+newVersion="${1%.*}.$((${1##*.}))"
+echo "$version"
+echo "$newVersion"
+
+vercomp $newVersion $version
+case $? in
+	0) op='=';;
+	1) op='>';;
+	2) op='<';;
+esac
+
+if [ $op != '>' ] 
+then
+	echo "New version must be greater than previous version ($version)."
+	exit 1
+fi
+
+# get the commits since the last release...
+# note: we do this here so the "Version x.x.x" commit doesn't show up in logs.
+changelog=git log --pretty=format:"- (%an) %s" $(git describe --tags --abbrev=0 @^)..@
+tempFile=$(mktemp)
+#write changelog to temp file.
+echo $changelog >> $tempFile
+
+# update sources/Segment/Version.swift
+# - remove last line...
+sed -i '' -e '$ d' $versionFile
+# - add new line w/ new version
+echo "internal let __segment_version = \"$newVersion\"" >> $versionFile
+
+# commit the version change.
+git commit -am "Version $newVersion" && git push
+# gh release will make both the tag and the release itself.
+gh release create $newVersion -F $tempFile -t "Version $newVersion"
+
+# remove the tempfile.
+rm $tempFile
+
+