From 6ffc2ac6e66ac2d47c09379ca8523e0cfd7c4ac4 Mon Sep 17 00:00:00 2001
From: mikessh <mikhail.shugay@gmail.com>
Date: Fri, 8 Apr 2016 23:16:29 +0300
Subject: [PATCH] Add shell script that facilitates running migec CLI

---
 migec | 144 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100644 migec

diff --git a/migec b/migec
new file mode 100644
index 0000000..f2f98e0
--- /dev/null
+++ b/migec
@@ -0,0 +1,144 @@
+#!/bin/bash
+
+java="java"
+
+sedString="s/.*1\.\(.*\)\..*/\1/"
+jVersion=$($java -version 2>&1 | grep version | awk '{ print $3 }' | sed $sedString)
+if [[ $jVersion -lt 7 ]];
+then
+    echo "Wrong java version. Please use Java 7 or higher."
+    exit 1
+fi
+
+# Linux readlink -f alternative for Mac OS X
+function readlinkUniversal() {
+    targetFile=$1
+
+    cd `dirname $targetFile`
+    targetFile=`basename $targetFile`
+
+    # iterate down a (possible) chain of symlinks
+    while [ -L "$targetFile" ]
+    do
+        targetFile=`readlink $targetFile`
+        cd `dirname $targetFile`
+        targetFile=`basename $targetFile`
+    done
+
+    # compute the canonicalized name by finding the physical path 
+    # for the directory we're in and appending the target file.
+    phys_dir=`pwd -P`
+    result=$phys_dir/$targetFile
+    echo $result
+}
+
+os=`uname`
+delta=100
+
+dir=""
+
+case $os in
+    Darwin)
+        freeBlocks=$(vm_stat | grep free | awk '{ print $3 }' | sed 's/\.//')
+        inactiveBlocks=$(vm_stat | grep inactive | awk '{ print $3 }' | sed 's/\.//')
+        speculativeBlocks=$(vm_stat | grep speculative | awk '{ print $3 }' | sed 's/\.//')
+        freeMb=$((($freeBlocks+$speculativeBlocks)*4096/1048576))
+        inactiveMb=$(($inactiveBlocks*4096/1048576))
+        maxMb=$((($freeMb+$inactiveMb-$delta)))
+        dir=$(dirname "$(readlinkUniversal "$0")")
+    ;;
+    Linux)
+        rFreeMb=$(free -m | head -n 3 | tail -n 1 | awk '{ print $4 }')
+        maxMb=$(($rFreeMb-$delta))
+        dir="$(dirname "$(readlink -f "$0")")"
+    ;;
+    *)
+       echo "Unknown OS."
+       exit 1
+    ;;
+esac
+
+migec=${dir}/migec
+
+migecArgs=()
+javaArgs=()
+
+needXmxXms=true
+otherJar=""
+
+while [[ $# > 0 ]]
+do
+    key="$1"
+    shift
+    case $key in
+        -D*|-X*|-ea|-agentlib*)
+            javaArgs+=(${key})
+
+            case $key in
+                -Xmx*|-Xms*)
+                    needXmxXms=false
+                    ;;
+            esac
+
+            ;;
+        -jar|-V)
+            otherJar="$1"
+            shift
+            ;;
+        *)
+            migecArgs+=(${key})
+            ;;
+    esac
+done
+
+if [[ ${needXmxXms} == true ]]
+then
+    targetXmx=12000
+
+    if [[ $targetXmx -gt $maxMb ]];
+    then
+        targetXmx=$maxMb
+    fi
+
+    javaArgs+=("-Xmx${targetXmx}m")
+
+    targetXms=$((${targetXmx}*2/3))
+
+    if [[ $targetXms -lt 2000 ]];
+    then
+        targetXms=$targetXmx
+    fi
+
+    javaArgs+=("-Xms${targetXms}m")
+fi
+
+jar=""
+
+if [[ -z "$otherJar" ]];
+then
+    for j in "$dir/../jar/migec.jar" "$dir/migec.jar" $(ls -d -1 $dir/target/* 2> /dev/null | grep distribution.jar)
+    do
+        if [[ -e "$j" ]];
+        then
+            jar=$j
+            break
+        fi
+    done
+else
+    for j in $(ls -1 ${dir}/* | grep "migec" | grep ".jar" | grep ${otherJar});
+    do
+        if [[ -e "$j" ]];
+        then
+            jar=$j
+            break
+        fi
+    done
+fi
+
+if [[ "$jar" == "" ]];
+then
+    echo "No jar."
+    exit 1
+fi
+
+$java -XX:+AggressiveOpts "${javaArgs[@]}" -jar $jar "${migecArgs[@]}"
\ No newline at end of file