Inconsistent Git tags

I see some issues with the Git tags:

• Some tags include the "v" prefix and some do not
  • In fact, there is both a 0.31.2 and v0.31.2
• Some crates.io releases do not have corresponding Git tags:
  • 0.0.2
  • 0.14.0
  • 0.15.0
  • 0.16.0
  • 0.17.0
  • 0.18.0
  • 0.19.0
  • 0.19.1
  • 0.20.1
  • 0.21.0
  • 0.21.1
  • 0.21.2
  • 0.25.4
  • 0.26.2
  • 0.28.0
  • 0.32.3
  • 0.33.0
  • 0.33.2

Expected Results

Each crates.io release has a unique corresponding Git tag

Recommendation

1. Write a shell script that makes a Git tag that is run every time a crates.io release is made.
   • I wrote tag_release.sh for capstone-sys that scrapes the version from Cargo.toml
2. Pick a convention for git tag names (has a "v" or not)
3. Create replacement git tags for existing git tags that do not meet the new naming convention.
   • Optionally, delete the old git tags that do not meet the convention.
4. For crates.io releases that do not have git tags, create the tags (they are listed above)
   • Or at least the recent ones ;-)

I used the following script to list the crates.io releases without Git tags:

#!/bin/bash

set -euxo pipefail

# Creates temp files
BINDGEN_CRATES_RELEASES="/tmp/bindgen_crate_releases.json"
CLEAN_GIT_TAGS="/tmp/clean_git_tag_versions.txt"

# tag names without leading 'v'; sort numerically
git tag | tr -d 'v' | sort -n -t'.' -k1,1g -k2,2g -k3,3g > "$CLEAN_GIT_TAGS"

# Get release information from crates.io-index
wget "https://raw.githubusercontent.com/rust-lang/crates.io-index/master/bi/nd/bindgen" -O "$BINDGEN_CRATES_RELEASES"

echo "Crates.io releases w/o a Git tag:"
# Select version field with jq uitility; get rid of quotes with xarsg
cat "$BINDGEN_CRATES_RELEASES" | jq '.vers' | xargs -n1 | grep -v -f <(cat "$CLEAN_GIT_TAGS")

Start by auditing the repository's existing Git tags against the crates.io versions listed in the issue, then review the referenced tag_release.sh script for an automation model. Define one tag naming convention, identify the missing and duplicate releases, and document verification that every crates.io release has one corresponding tag.