Edit environment variable configuration

* rename PROFILE_ENABLE_DAILYTRANSCRIPTS TO PROFILE_ENABLE_DAILY_TRANSCRIPTS
* add PROFILE_LOAD_CUSTOM_SCRIPTS and document its behavior in the
  readme file

README.md

@@ -23,12 +23,13 @@ New-Item -Path $ProfilePath -ItemType SymbolicLink -Value $(Resolve-Path profile
 ## Configuration
 
 Some additional features can be turned on by setting their respective environment
-variables.
+variables:
 
-```powershell
-# enable storing daily terminal transcription in the documents folder
-Set-EnvironmentVariable -Key PROFILE_ENABLE_DAILYTRANSCRIPTS -Value 1
-```
+- `PROFILE_ENABLE_DAILY_TRANSCRIPTS`: Set this environment variable to `1` to
+  enable automatic transcript storing in `MyDocuments\Transcripts` (off by default.)
+
+- `PROFILE_LOAD_CUSTOM_SCRIPTS`: Declare a single path to dot-source Powershell
+  scripts from on profile launch.
 
 ## Features
 

profile.ps1

@@ -32,6 +32,12 @@ $global:OperatingSystem = if ([OperatingSystem]::IsWindows()) {
 [CultureInfo]::CurrentCulture = "ja-JP"
 $PSDefaultParameterValues["*:Encoding"] = "utf8"
 
+if ($env:PROFILE_LOAD_CUSTOM_SCRIPTS) {
+    Get-ChildItem -Path $env:PROFILE_LOAD_CUSTOM_SCRIPTS -Filter "*.ps1" | ForEach-Object {
+        . $_.FullName
+    }
+}
+
 if ([OperatingSystem]::IsWindows()) {
     $global:PSRC = "$HOME\Documents\PowerShell\profile.ps1"
     $global:VSRC = "$env:APPDATA\Code\User\settings.json"
@@ -1257,7 +1263,7 @@ function Start-DailyTranscript {
         $Filename = [Path]::Combine($Transcripts, [string]::Format("{0}.txt", [datetime]::Now.ToString("yyyy-MM-dd")))
     }
     process {
-        if ($env:PROFILE_ENABLE_DAILYTRANSCRIPTS -eq 1) {
+        if ($env:PROFILE_ENABLE_DAILY_TRANSCRIPTS -eq 1) {
             Write-Verbose "Started a new transcript, output file is $Filename"
             Start-Transcript -Path $Filename -Append -IncludeInvocationHeader -UseMinimalHeader | Out-Null
         }