On UNIX (and even Cygwin) we can package the entire jgit library into a single JAR file and prefix that JAR with a shell script to start the JVM, passing in the script/JAR file as the only classpath. This trick works because the table of contents for the ZIP file is at the end of the stream, and the JVM tends to only do random access through that table when it looks up classes for loading. A tiny shell script called make_jgit.sh compiles everything with the command line javac and packages it into the portable jgit shell script, making it possible to build and use jgit without touching either Eclipse or Maven. Currently this is quite easy to implement as we have only one support library (JSch), but things may get more complicated if we add another JAR to our classpath. With this I can install JGit into my personal account and make use of it on a daily basis from the command line: ./make_jgit.sh mv jgit ~/bin jgit push ... Signed-off-by: Shawn O. Pearce <spearce@xxxxxxxxxxx> --- .gitignore | 1 + jgit | 37 ------------------------------------- jgit.sh | 45 +++++++++++++++++++++++++++++++++++++++++++++ make_jgit.sh | 26 ++++++++++++++++++++++++++ 4 files changed, 72 insertions(+), 37 deletions(-) create mode 100644 .gitignore delete mode 100755 jgit create mode 100755 jgit.sh create mode 100755 make_jgit.sh diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..0763732 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +/jgit diff --git a/jgit b/jgit deleted file mode 100755 index be7df7e..0000000 --- a/jgit +++ /dev/null @@ -1,37 +0,0 @@ -#!/bin/sh - -jgit_home=`dirname $0` -cp="$jgit_home/org.spearce.jgit/bin" -cp="$cp:$jgit_home/org.spearce.jgit/lib/jsch-0.1.37.jar" -unset jgit_home -java_args= - -# Cleanup paths for Cygwin. -# -case "`uname`" in -CYGWIN*) - cp=`cygpath --windows --mixed --path "$cp"` - ;; -Darwin) - if test -e /System/Library/Frameworks/JavaVM.framework - then - java_args=' - -Dcom.apple.mrj.application.apple.menu.about.name=JGit - -Dcom.apple.mrj.application.growbox.intrudes=false - -Dapple.laf.useScreenMenuBar=true - -Xdock:name=JGit - ' - fi - ;; -esac - -CLASSPATH="$cp" -export CLASSPATH - -java=java -if test -n "$JAVA_HOME" -then - java="$JAVA_HOME/bin/java" -fi - -exec "$java" $java_args org.spearce.jgit.pgm.Main "$@" diff --git a/jgit.sh b/jgit.sh new file mode 100755 index 0000000..84927bc --- /dev/null +++ b/jgit.sh @@ -0,0 +1,45 @@ +#!/bin/sh + +if [ "@@use_self@@" = "1" ] +then + this_script=`which "$0" 2>/dev/null` + [ $? -gt 0 -a -f "$0" ] && this_script="$0" + cp=$this_script +else + jgit_home=`dirname $0` + cp="$jgit_home/org.spearce.jgit/bin" + cp="$cp:$jgit_home/org.spearce.jgit/lib/jsch-0.1.37.jar" + unset jgit_home + java_args= +fi + +# Cleanup paths for Cygwin. +# +case "`uname`" in +CYGWIN*) + cp=`cygpath --windows --mixed --path "$cp"` + ;; +Darwin) + if test -e /System/Library/Frameworks/JavaVM.framework + then + java_args=' + -Dcom.apple.mrj.application.apple.menu.about.name=JGit + -Dcom.apple.mrj.application.growbox.intrudes=false + -Dapple.laf.useScreenMenuBar=true + -Xdock:name=JGit + ' + fi + ;; +esac + +CLASSPATH="$cp" +export CLASSPATH + +java=java +if test -n "$JAVA_HOME" +then + java="$JAVA_HOME/bin/java" +fi + +exec "$java" $java_args org.spearce.jgit.pgm.Main "$@" +exit 1 diff --git a/make_jgit.sh b/make_jgit.sh new file mode 100755 index 0000000..3889dca --- /dev/null +++ b/make_jgit.sh @@ -0,0 +1,26 @@ +#!/bin/sh + +PATH=$JAVA_HOME/bin:$PATH +O=jgit +T=".temp$$.$O" + +rm -f $O +rm -rf $T $O+ org.spearce.jgit/bin2 +cp org.spearce.jgit/lib/jsch-0.1.37.jar $T && +mkdir org.spearce.jgit/bin2 && +(cd org.spearce.jgit/src && + find . -name \*.java -type f | + xargs javac \ + -source 1.5 \ + -target 1.5 \ + -g \ + -d ../bin2 \ + -cp ../lib/jsch-0.1.37.jar) && +jar uf $T -C org.spearce.jgit/bin2 . && +jar uf $T -C org.spearce.jgit META-INF && +sed s/@@use_self@@/1/ jgit.sh >$O+ && +cat $T >>$O+ && +chmod 555 $O+ && +mv $O+ $O && +echo "Created $O." && +rm -rf $T $O+ org.spearce.jgit/bin2 -- 1.5.6.74.g8a5e -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
