X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~yarrgweb/git?p=jarrg-owen.git;a=blobdiff_plain;f=jpctb;h=f6c60e1552d879c28dceb7a34a66608ee19fc47e;hp=1356b396f57657a5ec1868d3fdb7ff26b3dcc947;hb=3eb74584022612700ae9bedcb7fd4fbc99277872;hpb=e7f6950e8e622a72e89019f1272a8c78025e043d;ds=sidebyside

diff --git a/jpctb b/jpctb
index 1356b39..f6c60e1 100755
--- a/jpctb
+++ b/jpctb
@@ -32,6 +32,12 @@ fail () {
 	echo >&2 "jpctb: $*"
 	exit 127
 }
+
+nojre () {
+	fail "couldn't find the right jre: $*
+ perhaps you should make ypp's java symlink (normally yohoho/java)
+ point to your jre, eg to /usr/lib/jvm/java-6-sun"
+
 badusage () {
 	fail "bad usage: $*"
 }
@@ -73,30 +79,63 @@ fi
 
 yppdir="${yohoho%/*}"
 
-if [ -x "$yppdir/java/bin/java" ]; then
-	javadir="$yppdir/java"
-elif [ x"$JAVA_HOME" != x ] && [ -x "$JAVA_HOME/bin/java" ]; then
-	javadir="$JAVA_HOME"
+# this replicates the java-searching logic from yohoho/yohoho:
+if [ -x "$yohoho/java/bin/java" ]; then
+	yppjava="$yohoho/java/bin/java"
+elif [ -x "$JAVA_HOME/bin/java" ]; then
+	yppjava="$JAVA_HOME/bin/java"
+else
+	set +e
+	yppjava=`type -p java 2>&1`
+	set -e
+fi
+
+cat <<END
+jpctb:
+   jpctb tree:	 "$jpctbdir"
+   yohoho:       "$yohoho"
+   ypp uses:     "$yppjava"
+END
+
+if ! [ -x "$yppjava" ]; then
+	nojre "bad java ypp"
+fi
+
+javadir="${yppjava#/bin/java}"
+if [ -x "$javadir/jre/bin/java" ]; then
+	echo "   java/ points to the jre, good"
 else
-	fail "could not find java runtime system"
+	echo "   java/ has just the executable bin/java, trying readlink"
+	absjava=`readlink -f "$yppjava"`
+	echo "   abs. java:    \"$absjava\""
+	case "$absjava" in
+	*/jre/bin/java)
+		echo "   found jre directory, good"
+		javadir="${absjava%/jre/bin/java}"
+		;;
+	*)
+		nojre "java binary not in jre dir"
+		;;
+	esac
 fi
 
 case "$javadir" in
-/*)	;;
-*)	javadir="$PWD/$javadir" ;;
+|/|/usr)	nojre "javadir is $javadir (and even found $javadir/jre!)" ;;
+/*)		;;
+*)		javadir="$PWD/$javadir" ;;
 esac
 
 jtmp="$jpctbdir/tmp"
 linkfarm="$jtmp/linkfarm"
 extdir="$jtmp/ext"
 
+export JPCTB_JRE="$javadir/jre"
+
 #---------- confirm for the user which paths we're using ----------
 
 cat <<END
-jpctb:
-   jpctb tree:	 "$jpctbdir"
-   yohoho:       "$yohoho"
    java:         "$javadir"
+   JRE:          "$JPCTB_JRE"
    PCTB jars:    "$srcjardir"
    jpctb tmpdir: "$jtmp"
 END
@@ -119,7 +158,6 @@ wrapper="$linkfarm"/jre/bin/java
 rm -- "$wrapper"
 
 export JPCTB_EXTDIR="$extdir"
-export JPCTB_JRE="$javadir/jre"
 
 cat <<'END' >"$wrapper"
 #!/bin/bash