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63 lines
2.0 KiB
Plaintext
63 lines
2.0 KiB
Plaintext
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#!/bin/sh -eu
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: ${MAFIA_HOME:=$HOME/.mafia}
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: ${MAFIA_VERSIONS:=$MAFIA_HOME/versions}
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latest_version () {
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git ls-remote https://github.com/haskell-mafia/mafia | grep refs/heads/master | cut -f 1
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}
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build_version() {
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MAFIA_VERSION="$1"
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MAFIA_TEMP=$(mktemp -d 2>/dev/null || mktemp -d -t 'exec_mafia')
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MAFIA_FILE=mafia-$MAFIA_VERSION
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MAFIA_PATH=$MAFIA_VERSIONS/$MAFIA_FILE
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mkdir -p $MAFIA_VERSIONS
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echo "Building $MAFIA_FILE in $MAFIA_TEMP"
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git clone https://github.com/haskell-mafia/mafia $MAFIA_TEMP
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git --git-dir="$MAFIA_TEMP/.git" --work-tree="$MAFIA_TEMP" reset --hard $MAFIA_VERSION || {
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echo "mafia version ($MAFIA_VERSION) could not be found." >&2
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exit 1
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}
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(cd "$MAFIA_TEMP" && ./bin/bootstrap) || {
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got=$?
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echo "mafia version ($MAFIA_VERSION) could not be built." >&2
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exit "$got"
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}
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chmod +x "$MAFIA_TEMP/.cabal-sandbox/bin/mafia"
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# Ensure executable is on same file-system so final mv is atomic.
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mv -f "$MAFIA_TEMP/.cabal-sandbox/bin/mafia" "$MAFIA_PATH.$$"
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mv "$MAFIA_PATH.$$" "$MAFIA_PATH" || {
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rm -f "$MAFIA_PATH.$$"
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echo "INFO: mafia version ($MAFIA_VERSION) already exists not overiding," >&2
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echo "INFO: this is expected if parallel builds of the same version of" >&2
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echo "INFO: mafia occur, we are playing by first in, wins." >&2
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exit 0
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}
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}
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enable_version() {
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if [ $# -eq 0 ]; then
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MAFIA_VERSION="$(latest_version)"
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echo "INFO: No explicit mafia version requested installing latest ($MAFIA_VERSION)." >&2
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else
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MAFIA_VERSION="$1"
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fi
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[ -x "$MAFIA_HOME/versions/mafia-$MAFIA_VERSION" ] || build_version "$MAFIA_VERSION"
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ln -sf "$MAFIA_HOME/versions/mafia-$MAFIA_VERSION" "$MAFIA_HOME/versions/mafia"
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}
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exec_mafia () {
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[ -x "$MAFIA_HOME/versions/mafia" ] || enable_version
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"$MAFIA_HOME/versions/mafia" "$@"
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}
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#
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# The actual start of the script.....
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#
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case "${1:-}" in
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upgrade) shift; enable_version "$@" ;;
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*) exec_mafia "$@"
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esac
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