Major refactoring. Splitting out the method groups into separate files.

1 files changed, 403 insertions, 0 deletions

diff --git a/.app/lib/app-app b/.app/lib/app-app
new file mode 100644
index 0000000..d59a231
--- /dev/null
+++ b/.app/lib/app-app
@@ -0,0 +1,403 @@
+#!/bin/bash
+
+if [ -n "$APPSH_REPO" ]
+then
+  repo="$APPSH_REPO"
+else
+  repo="http://repo1.maven.org"
+fi
+
+# TODO: support file:// repositories
+# TODO: look in the local repository first
+# TODO: assert that we got a 200 OK
+get() { 
+  local exit
+
+  curl -o $2 $1 -D curl.tmp
+
+  exit=`grep "^HTTP/[0-9]\.[0-9] 200 .*" curl.tmp >/dev/null; echo $?`
+  head=`head -n 1 curl.tmp`
+  rm curl.tmp
+  if [ "$exit" != 0 ]
+  then
+    echo "Unable to download $1: $head"
+    exit 1
+  fi
+}
+
+resolved_version=
+resolve_snapshot() {
+  local base_url
+  local metadata
+
+  echo "Resolving version $version..."
+  metadata=$BASEDIR/.app/var/download/$groupId-$artifactId-$version-metadata.xml
+  base_url=$repo/$(echo $groupId | sed "s,\.,/,g")/$artifactId/$version
+  get $base_url/maven-metadata.xml $metadata
+  resolved_version=`xmlstarlet sel -t -m '//snapshotVersion[extension[text()="zip"]]' -v value $metadata`
+
+  if [ -z "$resolved_version" ]
+  then
+    echo "Unable to resolve version."
+    exit 1
+  fi
+  echo "Resolved version $version to $resolved_version"
+}
+
+zip_file=
+download_artifact() {
+  zip_file=$BASEDIR/.app/var/download/$groupId-$artifactId-$resolved_version.zip
+  if [ -r $zip_file ]
+  then
+    echo "Artifact already downloaded."
+    return 0
+  fi
+  echo "Downloading artifact"
+  base_url=$repo/$(echo $groupId | sed "s,\.,/,g")/$artifactId/$version
+  get $base_url/$artifactId-$resolved_version.zip $zip_file
+
+  # TODO: download checksum. bash is too shady to trust
+}
+
+method_install_usage() {
+  if [ -n "$1" ]
+  then
+    echo "Error:" "$@" >&2
+  fi
+
+  echo "usage:" >&2
+  echo ""
+  echo "Install Maven artifact from repo:" >&2
+  echo "  $0 install -m groupId:artifactId [-n name] -i instance [-v version]" >&2
+  echo "Name defaults to artifactId." >&2
+  echo ""
+  echo "Install zip file:" >&2
+  echo "  $0 install -f file -n name -i instance [-v version]" >&2
+  echo "The version defaults to the current timestamp" >&2
+  exit 1
+}
+
+method_install() {
+  local m
+
+  while getopts "m:n:i:v:f:" opt
+  do
+    case $opt in
+      m)
+        m=$OPTARG
+        groupId=`echo $OPTARG | cut -s -f 1 -d :`
+        artifactId=`echo $OPTARG | cut -s -f 2 -d :`
+        if [ -z "$groupId" -o -z "$artifactId" ]
+        then
+          method_install_usage "Invalid -m value."
+        fi
+        ;;
+      n)
+        name=$OPTARG
+        ;;
+      i)
+        instance=$OPTARG
+        ;;
+      v)
+        version=$OPTARG
+        ;;
+      f)
+        file=$OPTARG
+        ;;
+      \?)
+        method_install_usage "Invalid option: -$OPTARG" 
+        ;;
+    esac
+  done
+
+  if [ -z "$file" -a -z "$m" ]
+  then
+    method_install_usage "Either -f or -m has to be specified." 
+  fi
+
+  if [ -n "$file" -a -n "$m" ]
+  then
+    method_install_usage "Only one of -f or -m can specified." 
+  fi
+
+  if [ -z "$instance" ]
+  then
+    method_install_usage "Missing required argument: -i instance."
+  fi
+
+  if [ -z "version" ]
+  then
+    method_install_usage "Missing required argument: -v version."
+  fi
+
+  if [ -n "$m" ]
+  then
+    if [ -z "$name" ]
+    then
+      name=$artifactId
+    fi
+
+    resolve_snapshot
+
+    download_artifact
+  else
+    zip_file=$file
+
+    if [ -z "$version" ]
+    then
+      version=`TZ=UTC date +"%Y%m%d-%H%M%S"`
+    fi
+
+    resolved_version=$version
+  fi
+
+  if [ ! -d $name/$instance ]
+  then
+    echo "Creating instance '$instance' for $name"
+    mkdir -p $name/$instance
+  fi
+
+  if [ -d $name/$instance/versions/$resolved_version ]
+  then
+    echo "Version $resolved_version is already installed"
+    exit 1
+  fi
+
+  mkdir -p $name/$instance/versions/$resolved_version
+
+  echo "Unpacking..."
+  unzip -q -d $name/$instance/versions/$resolved_version $zip_file
+
+  (
+    cd $name/$instance/versions/$resolved_version
+    if [ -d scripts ]
+    then
+      find scripts | xargs chmod +x
+    fi
+
+    if [ -x scripts/postinstall ]
+    then
+      echo "Running postinstall..."
+      set +e
+      env -i \
+        PATH=$PATH \
+        scripts/postinstall
+      set -e
+      ret=`echo $?`
+      if [ "$ret" != 0 ]
+      then
+        echo "Postinstall failed!"
+        exit 1
+      fi
+      echo "Postinstall completed successfully"
+    fi
+  )
+
+  echo "Changing current symlink"
+  rm -f $BASEDIR/$name/$instance/current
+  ln -s versions/$resolved_version/root $BASEDIR/$name/$instance/current
+
+  (
+    cd $name/$instance/current
+    find bin -type f | xargs chmod +x
+  )
+
+  if [ -r $BASEDIR/.app/var/list ]
+  then
+    sed "/^$name:$instance/d" $BASEDIR/.app/var/list > $BASEDIR/.app/var/list.new
+  fi
+  echo "$name:$instance:$version" >> $BASEDIR/.app/var/list.new
+  mv $BASEDIR/.app/var/list.new $BASEDIR/.app/var/list
+}
+
+method_set_current_usage() {
+  if [ -n "$1" ]
+  then
+    echo "Error:" "$@" >&2
+  fi
+
+  echo "usage: set-current -n name -i instance -v version" >&2
+  exit 1
+}
+
+method_set_current() {
+  local name
+  local instance
+  local version
+
+  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 $BASEDIR/$name/$instance/versions/$version ]
+  then
+    echo "Invalid version: $version."
+    exit 1
+  fi
+
+  rm -f $BASEDIR/$name/$instance/current
+  ln -s versions/$version/root $BASEDIR/$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 "  $0 list" >&2
+  echo ""
+  echo "List all applications in an parseable format:" >&2
+  echo "  $0 -P instance -P version -n foo" >&2
+  exit 1
+}
+
+method_list() {
+  local mode="pretty"
+  local vars
+  local filter_name
+
+  while getopts "P:n:" opt
+  do
+    case $opt in
+      P)
+        mode="parseable"
+        vars="$vars $OPTARG"
+        ;;
+      n)
+        filter_name=$OPTARG
+        ;;
+      \?)
+        method_list_usage "Invalid option: -$OPTARG" 
+        ;;
+    esac
+  done
+ 
+  if [ ! -r $BASEDIR/.app/var/list ]
+  then
+    return
+  fi
+
+  if [ $mode = "pretty" ]
+  then
+    printf "%-20s %-20s %-20s\n" "Name" "Instance" "Version"
+    list_apps "$filter_name" name instance version | (IFS=:; while read name instance version
+    do
+      printf "%-20s %-20s %-20s\n" "$name" "$instance" "$version"
+    done)
+  else
+    list_apps "$filter_name" $vars
+  fi
+}
+
+method_list_versions_usage() {
+  if [ -n "$1" ]
+  then
+    echo "Error:" "$@" >&2
+  fi
+
+  echo "usage: list-versions -n name -i instance [-P]" >&2
+  echo "  -P - parseable output" >&2
+  exit 1
+}
+
+method_list_versions() {
+  local name
+  local instance
+  local version
+  local mode="pretty"
+
+  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_app_usage() {
+  if [ -n "$1" ]
+  then
+    echo "Error:" $@ >&2
+  fi
+
+  echo "usage: $0 app <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_app() {
+  local name="$1"
+  local instance="$2"
+
+  if [ $# -gt 2 ]
+  then
+    method=$3
+    shift
+  fi
+
+  case "$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" "$instance" "$@" ;;
+    *)             method_app_usage ;;
+  esac
+  exit $?
+}