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99 lines
2.1 KiB
Bash
99 lines
2.1 KiB
Bash
#!/usr/bin/env bash
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# vim:ts=4:sts=4:sw=4:et
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#
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# Author: Hari Sekhon
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# Date: 2024-08-28 21:07:22 +0200 (Wed, 28 Aug 2024)
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#
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# https///github.com/HariSekhon/DevOps-Bash-tools
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#
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# License: see accompanying Hari Sekhon LICENSE file
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#
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# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
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#
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# https://www.linkedin.com/in/HariSekhon
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#
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set -euo pipefail
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[ -n "${DEBUG:-}" ] && set -x
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srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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# shellcheck disable=SC1090,SC1091
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. "$srcdir/lib/utils.sh"
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# shellcheck disable=SC2034,SC2154
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usage_description="
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Decompiles a Java jar
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Unpacks it in /tmp, finds the Main-Class from the META-INF/MANIFEST.MF
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and runs the Java decompiler JD GUI on its main .class file
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Uses adjacent script ./jd_gui.sh
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which uses ../install/download_jd_gui_jar.sh if the JD GUI jar is not already available
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Require Java to already be installed and in the \$PATH
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"
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# used by usage() in lib/utils.sh
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# shellcheck disable=SC2034
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usage_args="<jar>"
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help_usage "$@"
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min_args 1 "$@"
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jar="$1"
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readlink(){
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if is_mac; then
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command greadlink "$@"
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else
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command readlink "$@"
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fi
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}
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if ! [[ "$jar" =~ \.jar$ ]]; then
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die "ERROR: arg given is not a JAR file: $jar"
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fi
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if ! [[ -f "$jar" ]]; then
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die "ERROR: jar file not found: $jar"
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fi
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jar="$(readlink -f "$jar")"
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if is_mac; then
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jar="${jar/\/private\/tmp/\/tmp}"
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fi
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if [ "$jar" != "/tmp/${jar##*/}" ]; then
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timestamp "Copying JAR to /tmp:"
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echo >&2
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unalias cp >&/dev/null || :
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cp -fv "$jar" /tmp/
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echo >&2
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fi
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cd /tmp/
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jar="${jar##*/}"
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timestamp "Unpacking JAR"
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#echo >&2
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tar zxf "$jar"
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#echo >&2
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echo >&2
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timestamp "Determining main class"
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main_class="$(awk '/Main-Class:/{print $2}' META-INF/MANIFEST.MF)"
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echo >&2
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if is_blank "$main_class"; then
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die "ERROR: failed to find Main-Class from unpacked jar's META-INF/MANIFEST.MF"
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fi
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timestamp "Determined main class to be: $main_class"
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echo >&2
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main_class_file="${main_class//./\/}"
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timestamp "Running decompiler on main class: $main_class_file"
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echo >&2
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"$srcdir/jd_gui.sh" "$main_class_file"
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