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https://github.com/obi1kenobi/cargo-semver-checks-action.git
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60 lines
2.2 KiB
Bash
60 lines
2.2 KiB
Bash
#!/usr/bin/env bash
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# Script requirements:
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# - curl
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# - jq
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# - sort with `-V` flag, available in `coreutils-7`
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# On macOS this may require `brew install coreutils`.
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# Fail on first error, on undefined variables, and on failures in pipelines.
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set -euo pipefail
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# Go to the repo root directory.
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cd "$(git rev-parse --show-toplevel)"
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# The first argument should be the name of a crate.
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CRATE_NAME="$1"
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CURRENT_VERSION="$( \
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cargo metadata --format-version 1 | \
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jq --arg crate_name "$CRATE_NAME" --exit-status -r \
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'.packages[] | select(.name == $crate_name) | .version' \
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)" || (echo >&2 "No crate named $CRATE_NAME found in workspace."; exit 1)
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echo >&2 "Crate $CRATE_NAME current version: $CURRENT_VERSION"
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# The leading whitespace is important! With it, we know that every version is both
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# preceded by and followed by whitespace. We use this fact to avoid matching
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# on substrings of versions.
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EXISTING_VERSIONS="
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$( \
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curl 2>/dev/null "https://crates.io/api/v1/crates/$CRATE_NAME" | \
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jq --exit-status -r .versions[].num \
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)"
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echo >&2 -e "Versions on crates.io:$EXISTING_VERSIONS\n"
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# Use version sort (sort -V) to get all versions in ascending order, then use grep to:
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# - grab the first line that matches the current version (--max-count=1)
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# - only match full lines (--line-regexp)
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# - get one line of leading context (-B 1) i.e. the immediately-smaller version, if one exists
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# - explicitly opt out of trailing context lines (-A 0)
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# Finally, use `head` to output only the first of the up-to-two lines output.
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# Now, either:
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# - two lines were output, and we grabbed the immediately-smaller version, or
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# - one line was output with only our version, because there was no immediately-smaller version,
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# and we grabbed that one. We sort this out with the subsequent conditional.
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OUTPUT="$( \
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echo -e "$CURRENT_VERSION$EXISTING_VERSIONS" | \
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sort -V | \
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grep -B 1 -A 0 --line-regexp --max-count=1 "$CURRENT_VERSION" | \
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head -n 1 \
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)"
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if [[ "$OUTPUT" == "$CURRENT_VERSION" ]]; then
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echo >&2 "There is no suitable comparison version."
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echo >&2 \
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"The current version $CURRENT_VERSION is smaller than any version published on crates.io"
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exit 1
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fi
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echo "Comparison version: $OUTPUT" >&2
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echo "$OUTPUT"
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