#!/usr/bin/tclsh
#
# This script is used to quickly test a VSIX (Visual Studio Extension) file
# with Visual Studio 2015 on Windows.
#
# PREREQUISITES
#
# 1. This tool must be executed with "elevated administrator" privileges.
#
# 2. Tcl 8.4 and later are supported, earlier versions have not been tested.
#
# 3. The "sqlite-UWP-output.vsix" file is assumed to exist in the parent
#    directory of the directory containing this script.  The [optional] first
#    command line argument to this script may be used to specify an alternate
#    file.  However, currently, the file must be compatible with both Visual
#    Studio 2015 and the Universal Windows Platform.
#
# 4. The "VERSION" file is assumed to exist in the parent directory of the
#    directory containing this script.  It must contain a version number that
#    matches the VSIX file being tested.
#
# 5. The temporary directory specified in the TEMP or TMP environment variables
#    must refer to an existing directory writable by the current user.
#
# 6. The VS140COMNTOOLS environment variable must refer to the Visual Studio
#    2015 common tools directory.
#
# USAGE
#
# The first argument to this script is optional.  If specified, it must be the
# name of the VSIX file to test.
#
package require Tcl 8.4

proc fail { {error ""} {usage false} } {
  if {[string length $error] > 0} then {
    puts stdout $error
    if {!$usage} then {exit 1}
  }

  puts stdout "usage:\
[file tail [info nameofexecutable]]\
[file tail [info script]] \[vsixFile\]"

  exit 1
}

proc isWindows {} {
  #
  # NOTE: Returns non-zero only when running on Windows.
  #
  return [expr {[info exists ::tcl_platform(platform)] && \
      $::tcl_platform(platform) eq "windows"}]
}

proc isAdministrator {} {
  #
  # NOTE: Returns non-zero only when running as "elevated administrator".
  #
  if {[isWindows]} then {
    if {[catch {exec -- whoami /groups} groups] == 0} then {
      set groups [string map [list \r\n \n] $groups]

      foreach group [split $groups \n] {
        #
        # NOTE: Match this group line against the "well-known" SID for
        #       the "Administrators" group on Windows.
        #
        if {[regexp -- {\sS-1-5-32-544\s} $group]} then {
          #
          # NOTE: Match this group line against the attributes column
          #       sub-value that should be present when running with
          #       elevated administrator credentials.
          #
          if {[regexp -- {\sEnabled group(?:,|\s)} $group]} then {
            return true
          }
        }
      }
    }
  }

  return false
}

proc getEnvironmentVariable { name } {
  #
  # NOTE: Returns the value of the specified environment variable or an empty
  #       string for environment variables that do not exist in the current
  #       process environment.
  #
  return [expr {[info exists ::env($name)] ? $::env($name) : ""}]
}

proc getTemporaryPath {} {
  #
  # NOTE: Returns the normalized path to the first temporary directory found
  #       in the typical set of environment variables used for that purpose
  #       or an empty string to signal a failure to locate such a directory.
  #
  set names [list]

  foreach name [list TEMP TMP] {
    lappend names [string toupper $name] [string tolower $name] \
        [string totitle $name]
  }

  foreach name $names {
    set value [getEnvironmentVariable $name]

    if {[string length $value] > 0} then {
      return [file normalize $value]
    }
  }

  return ""
}

proc appendArgs { args } {
  #
  # NOTE: Returns all passed arguments joined together as a single string
  #       with no intervening spaces between arguments.
  #
  eval append result $args
}

proc readFile { fileName } {
  #
  # NOTE: Reads and returns the entire contents of the specified file, which
  #       may contain binary data.
  #
  set file_id [open $fileName RDONLY]
  fconfigure $file_id -encoding binary -translation binary
  set result [read $file_id]
  close $file_id
  return $result
}

proc writeFile { fileName data } {
  #
  # NOTE: Writes the entire contents of the specified file, which may contain
  #       binary data.
  #
  set file_id [open $fileName {WRONLY CREAT TRUNC}]
  fconfigure $file_id -encoding binary -translation binary
  puts -nonewline $file_id $data
  close $file_id
  return ""
}

proc putsAndEval { command } {
  #
  # NOTE: Outputs a command to the standard output channel and then evaluates
  #       it in the callers context.
  #
  catch {
    puts stdout [appendArgs "Running: " [lrange $command 1 end] ...\n]
  }

  return [uplevel 1 $command]
}

proc isBadDirectory { directory } {
  #
  # NOTE: Returns non-zero if the directory is empty, does not exist, -OR- is
  #       not a directory.
  #
  catch {
    puts stdout [appendArgs "Checking directory \"" $directory \"...\n]
  }

  return [expr {[string length $directory] == 0 || \
      ![file exists $directory] || ![file isdirectory $directory]}]
}

proc isBadFile { fileName } {
  #
  # NOTE: Returns non-zero if the file name is empty, does not exist, -OR- is
  #       not a regular file.
  #
  catch {
    puts stdout [appendArgs "Checking file \"" $fileName \"...\n]
  }

  return [expr {[string length $fileName] == 0 || \
      ![file exists $fileName] || ![file isfile $fileName]}]
}

#
# NOTE: This is the entry point for this script.
#
set script [file normalize [info script]]

if {[string length $script] == 0} then {
  fail "script file currently being evaluated is unknown" true
}

if {![isWindows]} then {
  fail "this tool only works properly on Windows"
}

if {![isAdministrator]} then {
  fail "this tool must run with \"elevated administrator\" privileges"
}

set path [file normalize [file dirname $script]]
set argc [llength $argv]; if {$argc > 1} then {fail "" true}

if {$argc == 1} then {
  set vsixFileName [lindex $argv 0]
} else {
  set vsixFileName [file join \
      [file dirname $path] sqlite-UWP-output.vsix]
}

###############################################################################

if {[isBadFile $vsixFileName]} then {
  fail [appendArgs \
      "VSIX file \"" $vsixFileName "\" does not exist"]
}

set versionFileName [file join [file dirname $path] VERSION]

if {[isBadFile $versionFileName]} then {
  fail [appendArgs \
      "Version file \"" $versionFileName "\" does not exist"]
}

set projectTemplateFileName [file join $path vsixtest.vcxproj.data]

if {[isBadFile $projectTemplateFileName]} then {
  fail [appendArgs \
      "Project template file \"" $projectTemplateFileName \
      "\" does not exist"]
}

set envVarName VS140COMNTOOLS
set vsDirectory [getEnvironmentVariable $envVarName]

if {[isBadDirectory $vsDirectory]} then {
  fail [appendArgs \
      "Visual Studio 2015 directory \"" $vsDirectory \
      "\" from environment variable \"" $envVarName \
      "\" does not exist"]
}

set vsixInstaller [file join \
    [file dirname $vsDirectory] IDE VSIXInstaller.exe]

if {[isBadFile $vsixInstaller]} then {
  fail [appendArgs \
      "Visual Studio 2015 VSIX installer \"" $vsixInstaller \
      "\" does not exist"]
}

set envVarName ProgramFiles
set programFiles [getEnvironmentVariable $envVarName]

if {[isBadDirectory $programFiles]} then {
  fail [appendArgs \
      "Program Files directory \"" $programFiles \
      "\" from environment variable \"" $envVarName \
      "\" does not exist"]
}

set msBuild [file join $programFiles MSBuild 14.0 Bin MSBuild.exe]

if {[isBadFile $msBuild]} then {
  fail [appendArgs \
      "MSBuild v14.0 executable file \"" $msBuild \
      "\" does not exist"]
}

set temporaryDirectory [getTemporaryPath]

if {[isBadDirectory $temporaryDirectory]} then {
  fail [appendArgs \
      "Temporary directory \"" $temporaryDirectory \
      "\" does not exist"]
}

###############################################################################

set installLogFileName [appendArgs \
    [file rootname [file tail $vsixFileName]] \
    -install- [pid] .log]

set commands(1) [list exec [file nativename $vsixInstaller]]

lappend commands(1) /quiet /norepair
lappend commands(1) [appendArgs /logFile: $installLogFileName]
lappend commands(1) [file nativename $vsixFileName]

###############################################################################

set buildLogFileName [appendArgs \
    [file rootname [file tail $vsixFileName]] \
    -build-%configuration%-%platform%- [pid] .log]

set commands(2) [list exec [file nativename $msBuild]]

lappend commands(2) [file nativename [file join $path vsixtest.sln]]
lappend commands(2) /target:Rebuild
lappend commands(2) /property:Configuration=%configuration%
lappend commands(2) /property:Platform=%platform%

lappend commands(2) [appendArgs \
    /logger:FileLogger,Microsoft.Build.Engine\;Logfile= \
    [file nativename [file join $temporaryDirectory \
    $buildLogFileName]] \;Verbosity=diagnostic]

###############################################################################

set uninstallLogFileName [appendArgs \
    [file rootname [file tail $vsixFileName]] \
    -uninstall- [pid] .log]

set commands(3) [list exec [file nativename $vsixInstaller]]

lappend commands(3) /quiet /norepair
lappend commands(3) [appendArgs /logFile: $uninstallLogFileName]
lappend commands(3) [appendArgs /uninstall:SQLite.UWP.2015]

###############################################################################

if {1} then {
  catch {
    puts stdout [appendArgs \
        "Install log: \"" [file nativename [file join \
        $temporaryDirectory $installLogFileName]] \"\n]
  }

  catch {
    puts stdout [appendArgs \
        "Build logs: \"" [file nativename [file join \
        $temporaryDirectory $buildLogFileName]] \"\n]
  }

  catch {
    puts stdout [appendArgs \
        "Uninstall log: \"" [file nativename [file join \
        $temporaryDirectory $uninstallLogFileName]] \"\n]
  }
}

###############################################################################

if {1} then {
  putsAndEval $commands(1)

  set versionNumber [string trim [readFile $versionFileName]]
  set data [readFile $projectTemplateFileName]
  set data [string map [list %versionNumber% $versionNumber] $data]

  set projectFileName [file join $path vsixtest.vcxproj]
  writeFile $projectFileName $data

  set platforms [list x86 x64 ARM]
  set configurations [list Debug Release]

  foreach platform $platforms {
    foreach configuration $configurations {
      putsAndEval [string map [list \
          %platform% $platform %configuration% $configuration] \
          $commands(2)]
    }
  }

  putsAndEval $commands(3)
}
