Add --dry-run option to push-release script

helper/push-release.sh

@@ -4,21 +4,34 @@ set -euo pipefail
 REPO=fort-nix/nix-bitcoin
 BRANCH=master
 OAUTH_TOKEN=$(pass show nix-bitcoin/github/oauth-token)
+DRY_RUN=
+TAG_NAME=
 
 if [[ ! $OAUTH_TOKEN ]]; then
     echo "Please set OAUTH_TOKEN variable"
 fi
 
-if [[ $# < 1 ]]; then
-    echo "$0 <tag_name>"
+for arg in "$@"; do
+    case $arg in
+        --dry-run|-n)
+            DRY_RUN=1
+            ;;
+        *)
+            TAG_NAME="$arg"
+            ;;
+    esac
+done
+
+if [[ ! $TAG_NAME ]]; then
+    echo "$0 [--dry-run|-n] <tag_name>"
     exit
 fi
-TAG_NAME=$1
+if [[ $DRY_RUN ]]; then echo "Dry run"; fi
 
 RESPONSE=$(curl https://api.github.com/repos/$REPO/releases/latest 2> /dev/null)
 echo "Latest release" $(echo $RESPONSE | jq -r '.tag_name' | tail -c +2)
 while true; do
-    read -p "Create release $1? [yn] " yn
+    read -p "Create release $TAG_NAME? [yn] " yn
     case $yn in
         [Yy]* ) break;;
         [Nn]* ) exit;;
@@ -27,7 +40,7 @@ while true; do
 done
 
 TMPDIR=$(mktemp -d)
-trap "rm -rf $TMPDIR" EXIT
+if [[ ! $DRY_RUN ]]; then trap "rm -rf $TMPDIR" EXIT; fi
 ARCHIVE_NAME=nix-bitcoin-$TAG_NAME.tar.gz
 ARCHIVE=$TMPDIR/$ARCHIVE_NAME
 
@@ -40,6 +53,11 @@ SHA256SUMS=$TMPDIR/SHA256SUMS.txt
 (cd $TMPDIR; sha256sum $ARCHIVE_NAME > $SHA256SUMS)
 gpg -o $SHA256SUMS.asc -a --detach-sig $SHA256SUMS
 
+if [[ $DRY_RUN ]]; then
+    echo "Created v$TAG_NAME in $TMPDIR"
+    exit 0
+fi
+
 POST_DATA="{ \"tag_name\": \"v$TAG_NAME\", \"name\": \"nix-bitcoin-$TAG_NAME\", \"body\": \"nix-bitcoin-$TAG_NAME\", \"target_comitish\": \"$BRANCH\" }"
 RESPONSE=$(curl -H "Authorization: token $OAUTH_TOKEN" -d "$POST_DATA" https://api.github.com/repos/$REPO/releases 2> /dev/null)
 ID=$(echo $RESPONSE | jq -r '.id')
@@ -50,8 +68,8 @@ fi
 
 post_asset() {
     GH_ASSET="https://uploads.github.com/repos/$REPO/releases/$ID/assets?name="
-    curl -H "Authorization: token $OAUTH_TOKEN" --data-binary "@$1" -H "Content-Type: application/octet-stream" \
-         $GH_ASSET/$(basename $1) &> /dev/null
+    curl -H "Authorization: token $OAUTH_TOKEN" --data-binary "@$TAG_NAME" -H "Content-Type: application/octet-stream" \
+         $GH_ASSET/$(basename $TAG_NAME) &> /dev/null
 }
 post_asset $ARCHIVE
 post_asset $SHA256SUMS