Install the latest release by default (#301)

Author: stepchowfun

MAINTAINERS.md

@@ -33,5 +33,5 @@ The GitHub workflow will fail initially because the jobs which test the installe
 Releasing a new version is a three-step process:
 
 1. Bump the version in `[file:Cargo.toml]`, run `cargo build` to update `[file:Cargo.lock]`, and update `[file:CHANGELOG.md]` with information about the new version. Ship those changes as a single commit.
-2. Once the GitHub workflow has finished on the `main` branch, update the version in `[file:install.sh]` to point to the new release. Also, update the `rev` in the example pre-commit configuration in `[file:README.md]` to point to the new version.
+2. Once the GitHub workflow has finished on the `main` branch, the installation script will begin installing the new release by default. Update the `rev` in the example pre-commit configuration in `[file:README.md]` to point to the new version.
 3. Create a pull request in the `Homebrew/homebrew-core` repository on GitHub to bump the version in [this file](https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/t/tagref.rb).

install.sh

@@ -13,9 +13,6 @@
   # Where the binary will be installed
   DESTINATION="${PREFIX:-/usr/local/bin}/tagref"
 
-  # Which version to download
-  RELEASE="v${VERSION:-1.13.0}"
-
   # Determine which binary to download.
   FILENAME=''
   if uname -a | grep -qi 'x86_64.*GNU/Linux'; then
@@ -56,10 +53,15 @@
   # Compute the full file path.
   SOURCE="$TEMPDIR/$FILENAME"
 
+  # Download the requested version, or the latest published version by default.
+  if [ -n "${VERSION:-}" ]; then
+    DOWNLOAD_URL="https://github.com/stepchowfun/tagref/releases/download/v$VERSION/$FILENAME"
+  else
+    DOWNLOAD_URL="https://github.com/stepchowfun/tagref/releases/latest/download/$FILENAME"
+  fi
+
   # Download the binary.
-  curl \
-    "https://github.com/stepchowfun/tagref/releases/download/$RELEASE/$FILENAME" \
-    -o "$SOURCE" -LSf || fail 'There was an error downloading the binary.'
+  curl "$DOWNLOAD_URL" -o "$SOURCE" -LSf || fail 'There was an error downloading the binary.'
 
   # Make it executable.
   chmod a+x "$SOURCE" || fail 'There was an error setting the permissions for the binary.'