/
scala-runner
executable file
·236 lines (207 loc) · 9.03 KB
/
scala-runner
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#!/usr/bin/env bash
#
# A dynamic scala runner, using coursier's app launch capabilities.
# Author: Dale Wijnand <dale.wijnand@gmail.com>
# https://github.com/dwijnand/scala-runners
shopt -s extglob # for extended pattern matching operators, like `+([0-9])`
app_name=$(basename "$0")
declare app_name
declare scala_version=latest.stable
declare -a java_args residual_args
declare verbose print_scala_version
declare -r scala_ea_builds_url=https://scala-ci.typesafe.com/artifactory/scala-integration
declare -r scala_pr_builds_url=https://scala-ci.typesafe.com/artifactory/scala-pr-validation-snapshots
echoerr() { echo >&2 "$@"; }
vlog() { [[ -n "$verbose" ]] && echoerr "$@"; }
die() { echo "$*"; exit 1; }
dropR() { echo "${1:0:$((${#1} - $2))}"; } # https://superuser.com/q/1033273 ${1:0:-5} (bash 4.2+)
checkExec() { type -f "$1" &> /dev/null || die "$1 command required"; }
checkHub() {
checkExec hub
if [ ! -f "${HOME}/.config/hub" ]; then
echo "No hub config found (at ~/.config/hub). Triggering hub to prompt you for credentials."
hub api
fi
}
curl() { checkExec curl && command curl "$@"; }
cs() { checkExec cs && command cs "$@"; }
jq() { checkExec jq && command jq "$@"; }
hub() { checkHub && command hub "$@"; }
addJava() { vlog "[addJava] arg = '$1'"; java_args+=("--java-opt" "$1"); }
addCoursier() { vlog "[addCoursier] arg = '$1'"; coursier_args+=("$1"); }
getScalaBaseVersion() {
vlog "[getScalaBaseVersion] arg = '$1'"
local build_sbt base_version cross
build_sbt=$(hub api -H "Accept: application/vnd.github.v3.raw" "repos/scala/scala/contents/build.sbt?ref=$1")
[ $? -eq 0 ] || die "$build_sbt"
base_version=$(grep -E '(baseVersion in Global|Global / baseVersion\b)' <<< "$build_sbt" | sed 's/.*"\(.*\)".*/\1/')
cross=$(grep -q -E '\d+\.\d+.0' <<< "$base_version" && echo "-pre" || echo "-bin")
echo "$base_version$cross"
}
getScalaHead() {
vlog "[getScalaHead] arg = '$1'"
if [[ "$1" = 3* ]]; then
echo "3+" # Using 3+ will find the latest NIGHTLY, which is the closest to Scala 2's merglies
else
local base_version refInfo sha
base_version=$(getScalaBaseVersion "heads/$1")
[ $? -eq 0 ] || die "$base_version"
refInfo=$(hub api "repos/scala/scala/git/ref/heads/$1")
[ $? -eq 0 ] || die "$refInfo"
sha=$(jq -r '.object.sha' <<< "$refInfo")
[ $? -eq 0 ] || die "$sha"
echo "$base_version-${sha:0:7}"
fi
}
getScalaNext() {
vlog "[getScalaNext] arg = '$1'"
if [[ "$1" = 3* ]]; then
# this is likely fragile and will need to be refined in the future.
# assumptions we are making include:
# * tag name doesn't start with `v`
# * releases are ordered such that latest RC comes last;
# this assumption breaks if e.g. the Scala 3 team releases 3.0.6 after 3.1.0-RC1;
# which is a plausible scenario, but maybe not worth accounting for? shrug, for now
hub api "repos/lampepfl/dotty/releases?per_page=1" | jq -r .[0].tag_name
else
curl -Ls "https://raw.github.com/scala/community-build/$1/nightly.properties" \
| sed -n 's/nightly=\(.*\)/\1/p'
fi
}
setCoursierOptionsForSv() {
case "$scala_version" in
*-@(bin|pre)-*SNAPSHOT) addCoursier "-r=$scala_pr_builds_url" ;;
*-@(bin|pre)-*) addCoursier "-r=$scala_ea_builds_url" ;;
*+) addCoursier "--no-default" && addCoursier "-r=central" ;;
esac
case "$scala_version" in
*-SNAPSHOT) addCoursier "--ttl=24h" ;;
*+) addCoursier "--ttl=24h" ;;
latest.*) addCoursier "--ttl=24h" ;; # latest.stable, latest.release, latest.integration
esac
}
setScalaVersion() {
vlog "[setScalaVersion] arg = '$1'"
[[ "$1" = 3* ]] && case "$app_name" in
scalac) app_name="scala3-compiler" ;;
scala) app_name="scala3" ;;
scaladoc) app_name="scala3-doc" ;;
scalap) app_name="scala3-decompiler" ;;
esac
case "$1" in
*.head) scala_version=$(getScalaHead "$(dropR "$1" 5).x") ;;
*.next) scala_version=$(getScalaNext "$(dropR "$1" 5).x") ;;
3+) scala_version=latest.stable ;; # Using "3+" makes cs pick the latest NIGHTLY
*) scala_version="$1" ;;
esac
[ $? -eq 0 ] || die "Failed to set scala version given the argument '$1', cause: $scala_version"
}
setScalaPrVersion() {
vlog "[setScalaPrVersion] arg = '$1'"
local base_version prInfo sha
base_version=$(getScalaBaseVersion "pull/$1/head")
[ $? -eq 0 ] || die "Failed to get scala base version for PR $1, cause: $base_version"
prInfo=$(hub api "repos/scala/scala/pulls/$1")
[ $? -eq 0 ] || die "$prInfo"
sha=$(jq -r '.head.sha' <<< "$prInfo")
[ $? -eq 0 ] || die "$sha"
setScalaVersion "$base_version-${sha:0:7}-SNAPSHOT"
}
usage() {
cat <<EOM
Usage: \$script_name [options]
Where, "script_name" is scala, scalac, scaladoc, or scalap.
All options not specified below are passed through.
-h | -help print this message (only when script_name is scala-runner)
-v verbose operation (this runner is chattier)
# scala version (default: latest.stable, resolved by Couriser)
-28 use the latest 2.8.x release
-29 use the latest 2.9.x release
-210 use the latest 2.10.x release
-211 use the latest 2.11.x release
-212 use the latest 2.12.x release
-213 use the latest 2.13.x release
-3 use the latest 3.x release
-2.12.next use the latest 2.12.x release candidate (from the community build)
-2.13.next use the latest 2.13.x release candidate
-3.next use the latest 3.x release candidate
-2.12.head use the latest 2.12.x branch HEAD build (latest "merge-ly")
-2.13.head use the latest 2.13.x branch HEAD build
-3.head use the latest 3.x nightly release
-<version> use the specified scala version, e.g. -2.13.6 or -3.0.1
--scala-version <version> use the specified scala version, e.g. --scala-version 3.1-my-test
--scala-pr <PR number> use the version of scala built from the specified PR
# passing options to the jvm
-Dkey=val pass -Dkey=val directly to the jvm
-J-X pass option -X directly to the jvm
# passing options to coursier
-C-X pass option -X directly to coursier (-C is stripped)
--print-scala-version prints the resolved scala version
EOM
exit 0
}
require_arg() {
local type="$1"
local opt="$2"
local arg="$3"
if [[ -z "$arg" ]] || [[ "${arg:0:1}" == "-" ]]; then
die "$opt requires <$type> argument"
fi
}
while [[ $# -gt 0 ]]; do
case "$1" in
-h | -help) [[ "$app_name" == "scala-runner" ]] && usage || residual_args+=("$1") && shift ;;
-v) verbose=true && shift ;;
-28) setScalaVersion "2.8+" && shift ;;
-29) setScalaVersion "2.9+" && shift ;;
-210) setScalaVersion "2.10+" && shift ;;
-211) setScalaVersion "2.11+" && shift ;;
-212) setScalaVersion "2.12+" && shift ;;
-213) setScalaVersion "2.13+" && shift ;;
-3) setScalaVersion "3+" && shift ;;
-@(2.1[2-4]|3).@(head|next)) setScalaVersion "${1:1}" && shift ;;
-[2-3].+([0-9]).+([0-9])*) setScalaVersion "${1:1}" && shift ;;
--scala-version) require_arg version "$1" "$2" && setScalaVersion "$2" && shift 2 ;;
--scala-pr) require_arg "PR number" "$1" "$2" && setScalaPrVersion "$2" && shift 2 ;;
-C*) addCoursier "${1:2}" && shift ;;
-D*) addJava "$1" && shift ;;
-J*) addJava "${1:2}" && shift ;;
--print-scala-version) print_scala_version=1 && shift ;;
*) residual_args+=("$1") && shift ;;
esac
[ $? -eq 0 ] || die "Failed to process arg '$1'"
done
setCoursierOptionsForSv
execRunner() {
# print the arguments one to a line, quoting any containing spaces
vlog "# Executing command line:" && {
for arg; do
if [[ -n "$arg" ]]; then
if printf "%s\n" "$arg" | grep -q ' '; then
printf >&2 "\"%s\"\n" "$arg"
else
printf >&2 "%s\n" "$arg"
fi
fi
done
vlog ""
}
"$@"
}
if [[ -n "$print_scala_version" ]]; then
case "$scala_version" in
*.*.*) echo "$scala_version" ;;
*)
json_file="$(mktemp -t scala-runner.cs-fetch.XXXXXX.json)"
execRunner cs fetch -j "$json_file" "$app_name:$scala_version" "${coursier_args[@]}" >/dev/null 2>&1
[ $? -eq 0 ] || die "Failed to run cs fetch: exit code $?, json_file=$json_file"
jq -r <"$json_file" '[.[]] | .[0] | [.[]] | .[0]' | cut -d: -f3
;;
esac
exit
fi
execRunner cs launch \
"$app_name:$scala_version" \
"${java_args[@]}" \
"${coursier_args[@]}" \
-- "${residual_args[@]}"