o Rewriting most of this stuff to make it feel more like git.

1 files changed, 502 insertions, 0 deletions

diff --git a/bin/app-instance b/bin/app-instance
new file mode 100755
index 0000000..02e3c0f
--- /dev/null
+++ b/bin/app-instance
@@ -0,0 +1,502 @@
+#!/bin/bash
+
+if [[ $APPSH_HOME == "" ]]
+then
+  APPSH_HOME=`dirname "$0"`
+  APPSH_HOME=`cd "$APPSH_HOME/.." && pwd`
+fi
+
+if [ -n "$APPSH_REPO" ]
+then
+  repo="$APPSH_REPO"
+else
+  repo="http://repo1.maven.org"
+fi
+
+calculate_md5() {
+  local file="$1"; shift
+
+  md5sum "$file" | cut -c 1-32
+}
+ 
+# TODO: support file:// repositories
+# TODO: look in the local repository first
+get() { 
+  local url=$1
+  local file=$2
+  local exit
+
+  curl -o $file $url -D curl.tmp
+
+  exit=`grep "^HTTP/[0-9]\.[0-9] 200 .*" curl.tmp >/dev/null; echo $?`
+  head=`head -n 1 curl.tmp`
+  rm -f curl.tmp
+  if [ "$exit" != 0 ]
+  then
+    echo "Unable to download $url: $head" >&2
+    exit 1
+  fi
+}
+
+resolve_snapshot() {
+  local groupId=$1; shift
+  local groupIdSlash=$1; shift
+  local artifactId=$1; shift
+  local version=$1; shift
+
+  local metadata=$apps/.app/var/download/$groupId-$artifactId-$version-metadata.xml
+  local base_url=$repo/$groupIdSlash/$artifactId/$version
+  get $base_url/maven-metadata.xml $metadata
+  local resolved_version=`xmlstarlet sel -t -m '//snapshotVersion[extension[text()="zip"]]' -v value $metadata`
+  echo $resolved_version
+}
+
+download_artifact() {
+  local file="$1"; shift
+  local url="$1"; shift
+
+  echo "Downloading $url.md5"
+  get $url.md5 $file.md5
+  local expected_md5="`cat $file.md5`"
+
+  if [ -r $file ]
+  then
+    if [ "$expected_md5" == "`calculate_md5 $file`" ]
+    then
+      echo "Artifact already downloaded."
+    else
+      rm -f "$file"
+    fi
+    return 0
+  fi
+  echo "Downloading artifact: $url"
+  get $url $file
+
+  local actual_md5="`calculate_md5 $file`"
+  if [ "$expected_md5" == "$actual_md5" ]
+  then
+    echo "Artifact downloaded."
+  else
+    echo "Invalid checksum. Expected $expected_md5, got $actual_md5" >&2
+    exit 1
+  fi
+}
+
+method_install_usage() {
+  if [ -n "$1" ]
+  then
+    echo "Error:" "$@" >&2
+  fi
+
+  echo "usage: install <-r resolver> -u <url>" >&2
+  echo "" >&2
+  echo "Install package from a Maven repository:" >&2
+  echo "  $0 [-n name] [-i instance] instance install -r maven -u groupId:artifactId:version" >&2
+  echo "" >&2
+  echo "Install package from a file:" >&2
+  echo "  $0 [-n name] [-i instance] instance install -r file -u file [-v version]" >&2
+  echo "The version defaults to the current timestamp" >&2
+  exit 1
+}
+
+method_install() {
+  local name="$1"; shift
+  local instance="$1"; shift
+  local version
+  local resolver
+  local url
+  local groupId
+  local artifactId
+  local zip_file
+
+
+  if [ $# -eq 0 ]
+  then
+    method_install_usage
+  fi
+
+  while getopts "n:i:v:r:u:" opt
+  do
+    case $opt in
+      n)
+        name=$OPTARG
+        ;;
+      i)
+        instance=$OPTARG
+        ;;
+      v)
+        version=$OPTARG
+        ;;
+      r)
+        resolver=$OPTARG
+        ;;
+      u)
+        url=$OPTARG
+        ;;
+      \?)
+        method_install_usage "Invalid option: -$OPTARG" 
+        ;;
+    esac
+  done
+
+  if [ -z "$name" ]
+  then
+    method_install_usage "Missing required argument: -i name."
+  fi
+
+  if [ -z "$instance" ]
+  then
+    method_install_usage "Missing required argument: -i instance."
+  fi
+
+  if [ -z "$resolver" ]
+  then
+    method_install_usage "Missing required option: -r resolver"
+  fi
+
+  if [ -z "$url" ]
+  then
+    method_install_usage "Missing required option: -u url"
+  fi
+
+  case "$resolver" in
+    maven)
+      url=`echo $url | tr ":" " "`; set -- $url
+      groupId=$1
+      artifactId=$2
+      version=$3
+
+      if [ -z "$groupId" -o -z "$artifactId" -o -z "$version" ]
+      then
+        method_install_usage "Invalid Maven url."
+      fi
+
+      local groupIdSlash=$(echo $groupId | sed "s,\.,/,g")
+      if [ "`echo $version | sed -n s,.*-SNAPSHOT$,SNAPSHOT,p`" == "SNAPSHOT" ]
+      then
+        echo "Resolving version $version..."
+        local resolved_version=`resolve_snapshot $groupId $groupIdSlash $artifactId $version`
+        if [ -z "$resolved_version" ]
+        then
+          echo "Unable to resolve version."
+          exit 1
+        fi
+        echo "Resolved version $version to $resolved_version"
+      else
+        resolved_version=$version
+      fi
+
+      zip_file=$apps/.app/var/download/$groupId-$artifactId-$resolved_version.zip
+      artifact_url=$repo/$groupIdSlash/$artifactId/$version/$artifactId-$resolved_version.zip
+
+      download_artifact "$zip_file" "$artifact_url"
+      ;;
+    file)
+      if [ ! -r "$url" ]
+      then
+        echo "Could not read file: $url" >&2
+        exit 1
+      fi
+
+      # TODO: should the zip file be copied into download/ so that
+      # there's always a local copy?
+      zip_file=$url
+
+      if [ -z "$version" ]
+      then
+        version=`TZ=UTC date +"%Y%m%d-%H%M%S"`
+      fi
+
+      resolved_version=$version
+      ;;
+    *)
+      method_install_usage "Invalid resolver type: $resolver" 
+      ;;
+  esac
+
+  if [ -d $name/$instance/versions/$resolved_version ]
+  then
+    echo "Version $resolved_version is already installed"
+    exit 1
+  fi
+
+  if [ ! -d $name/$instance ]
+  then
+    echo "Creating instance '$instance' for '$name'"
+    mkdir -p $name/$instance
+  fi
+
+  mkdir -p $name/$instance/versions/$resolved_version
+
+  echo "Unpacking..."
+  unzip -q -d $name/$instance/versions/$resolved_version $zip_file
+
+  if [ ! -d $name/$instance/versions/$resolved_version/root ]
+  then
+    echo "Invalid zip file, did not contain a ./root directory." >&2
+    exit 1
+  fi
+
+  echo "Changing current symlink"
+  rm -f $apps/$name/$instance/current
+  ln -s versions/$resolved_version/root $apps/$name/$instance/current
+
+  if [ -d $name/$instance/current/bin ]
+  then
+    (
+      cd $name/$instance/current
+      find bin -type f | xargs chmod +x
+    )
+  fi
+
+  (
+    cd $name/$instance/versions/$resolved_version
+    if [ -d scripts ]
+    then
+      find scripts | xargs chmod +x
+    fi
+
+    if [ -x scripts/postinstall ]
+    then
+      echo "Running postinstall..."
+      cd root
+      set +e
+      env -i \
+        PATH=/bin:/usr/bin \
+        APPSH_APPS=$apps \
+        APPSH_HOME=$APPSH_HOME \
+        APPSH_NAME=$name \
+        APPSH_INSTANCE=$instance \
+        APPSH_VERSION=$resolved_version \
+        ../scripts/postinstall
+      set -e
+      ret=`echo $?`
+      if [ "$ret" != 0 ]
+      then
+        echo "Postinstall failed!"
+        exit 1
+      fi
+      echo "Postinstall completed successfully"
+    fi
+  )
+
+  if [ -r $apps/.app/var/list ]
+  then
+    sed "/^$name:$instance/d" $apps/.app/var/list > $apps/.app/var/list.new
+  fi
+  echo "$name:$instance:$version:$url" >> $apps/.app/var/list.new
+  mv $apps/.app/var/list.new $apps/.app/var/list
+}
+
+method_set_current_usage() {
+  if [ -n "$1" ]
+  then
+    echo "Error:" "$@" >&2
+  fi
+
+  echo "usage: set-current -v version" >&2
+  exit 1
+}
+
+method_set_current() {
+  local name="$1"; shift
+  local instance="$1"; shift
+  local version
+
+  if [ $# -eq 0 ]
+  then
+    method_set_current_usage
+  fi
+
+  while getopts "n:i:v:" opt
+  do
+    case $opt in
+      n)
+        name=$OPTARG
+        ;;
+      i)
+        instance=$OPTARG
+        ;;
+      v)
+        version=$OPTARG
+        ;;
+      \?)
+        method_set_current_usage "Invalid option: -$OPTARG" 
+        ;;
+    esac
+  done
+
+  if [ -z "$version" ]
+  then
+    echo "Missing required option -v version." >&2
+    exit 1
+  fi
+
+  assert_is_instance method_set_current_usage "$name" "$instance" "no"
+
+  if [ ! -d $apps/$name/$instance/versions/$version ]
+  then
+    echo "Invalid version: $version."
+    exit 1
+  fi
+
+  rm -f $apps/$name/$instance/current
+  ln -s versions/$version/root $apps/$name/$instance/current
+
+  return 0
+}
+
+method_list_usage() {
+  if [ -n "$1" ]
+  then
+    echo "Error:" "$@" >&2
+  fi
+
+  echo "usage: list [-n name] [-P field]" >&2
+  echo ""
+  echo "List all installed applications:" >&2
+  echo "  list" >&2
+  echo ""
+  echo "List all applications with the selected fields with parseable output:" >&2
+  echo "  list -P instance -P version -n foo" >&2
+  exit 1
+}
+
+method_list() {
+  local filter_name="$1"; shift
+  local filter_instance="$1"; shift
+  local mode="pretty"
+  local vars
+  local filter_name
+
+  while getopts "P:n:i:" opt
+  do
+    case $opt in
+      P)
+        mode="parseable"
+        vars="$vars $OPTARG"
+        ;;
+      n)
+        filter_name=$OPTARG
+        ;;
+      i)
+        filter_instance=$OPTARG
+        ;;
+      \?)
+        method_list_usage "Invalid option: -$OPTARG" 
+        ;;
+    esac
+  done
+ 
+  if [ ! -r $apps/.app/var/list ]
+  then
+    return
+  fi
+
+  if [ $mode = "pretty" ]
+  then
+    printf "%-20s %-20s %-20s\n" "Name" "Instance" "Version"
+    list_apps "$filter_name" "$filter_instance" name instance version | (IFS=:; while read name instance version
+    do
+      printf "%-20s %-20s %-20s\n" "$name" "$instance" "$version"
+    done)
+  else
+    list_apps "$filter_name" "$filter_instance" $vars
+  fi
+}
+
+method_list_versions_usage() {
+  if [ -n "$1" ]
+  then
+    echo "Error:" "$@" >&2
+  fi
+
+  echo "usage: list-versions -n name -i instance [-P]" >&2
+  exit 1
+}
+
+method_list_versions() {
+  local filter_name="$1"; shift
+  local instance="$1"; shift
+  local version
+  local mode="pretty"
+
+  if [ $# -eq 0 ]
+  then
+    method_list_versions_usage
+  fi
+
+  while getopts "n:i:P" opt
+  do
+    case $opt in
+      n)
+        name=$OPTARG
+        ;;
+      i)
+        instance=$OPTARG
+        ;;
+      v)
+        version=$OPTARG
+        ;;
+      P)
+        mode="parseable"
+        ;;
+      \?)
+        method_list_versions_usage "Invalid option: -$OPTARG" 
+        ;;
+    esac
+  done
+
+  assert_is_instance method_list_versions_usage "$name" "$instance" "no"
+
+  if [ $mode = "pretty" ]
+  then
+    echo "Available versions for $name/$instance:"
+  fi
+
+  find_versions $name $instance
+
+  return 0
+}
+
+method_instance_usage() {
+  if [ -n "$1" ]
+  then
+    echo "Error:" $@ >&2
+  fi
+
+  echo "usage: $0 instance <method>" >&2
+  echo "" >&2
+  echo "Available methods:" >&2
+  echo "  install       - Installs an application" >&2
+  echo "  list          - List all installed applications" >&2
+  echo "  list-versions - List all available versions for a single application" >&2
+  echo "  set-current   - Set the current version" >&2
+}
+
+method_instance() {
+  local name="$1"; shift
+  local instance="$1"; shift
+  local method="$1"
+
+  if [ $# -gt 0 ]
+  then
+    shift
+  fi
+
+  case "$method" in
+    install)       method_install       "$name" "$instance" "$@" ;;
+    list)          method_list          "$name" "$instance" "$@" ;;
+    list-versions) method_list_versions "$name" "$instance" "$@" ;;
+    set-current)   method_set_current   "$name" "$instance" "$@" ;;
+    *)
+      if [ -z "$method" ]
+      then
+        method_instance_usage
+      else
+        method_instance_usage "Unknown method $method"
+      fi
+      ;;
+  esac
+  exit $?
+}