Add scoop-info command (#2165)

Shows information about an installed app.
- name and description
- version and latest version
- license (with link to spdx.org)
- linked binaries
- shows install notes
- URL or path to manifest

libexec/scoop-info.ps1

@@ -0,0 +1,85 @@
+# Usage: scoop info <app>
+# Summary: Display information about an app
+param($app)
+
+. "$psscriptroot\..\lib\buckets.ps1"
+. "$psscriptroot\..\lib\core.ps1"
+. "$psscriptroot\..\lib\depends.ps1"
+. "$psscriptroot\..\lib\help.ps1"
+. "$psscriptroot\..\lib\install.ps1"
+. "$psscriptroot\..\lib\manifest.ps1"
+. "$psscriptroot\..\lib\versions.ps1"
+
+reset_aliases
+
+if(!$app) { my_usage; exit 1 }
+
+$global = installed $app $true
+$app, $bucket, $null = app $app
+$status = app_status $app $global
+$manifest, $bucket = find_manifest $app $bucket
+
+if (!$manifest) {
+    if ($bucket) {
+        abort "Could not find manifest for '$bucket/$app'."
+    } else {
+        abort "Could not find manifest for '$app'."
+    }
+}
+
+$install = install_info $app $status.version $global
+$manifest_file = manifest_path $app $bucket
+$version_output = $manifest.version
+
+if($status.installed) {
+    $bucket = $install.bucket
+    $manifest_file = manifest_path $app $bucket
+    if($install.url) { $manifest_file = $install.url }
+    if($status.version -eq $manifest.version) {
+        $version_output = $status.version
+    } else {
+        $version_output = "$($status.version) (Update to $($manifest.version) available)"
+    }
+}
+
+Write-Output "Name:      $app"
+if ($manifest.description) {
+    Write-Output "  $($manifest.description)"
+}
+Write-Output "Version:   $version_output"
+Write-Output "Website:   $($manifest.homepage)"
+# Show license
+if ($manifest.license) {
+    $license = $manifest.license
+    if($manifest.license -notmatch '^((ht)|f)tps?://') {
+        $license = "$($manifest.license) (https://spdx.org/licenses/$($manifest.license).html)"
+    }
+    Write-Output "License:   $license"
+}
+
+# Show installed versions
+if($status.installed) {
+    Write-Output "Installed:"
+    $versions = versions $app $global
+    $versions | ForEach-Object {
+        $dir = versiondir $app $_ $global
+        if($global) { $dir += " *global*" }
+        Write-Output "  $dir"
+    }
+    Write-Output "Binaries:"
+    $binaries = arch_specific 'bin' $manifest $install.architecture
+    Write-Output "  $binaries"
+} else {
+    Write-Output "Installed: No"
+}
+
+# Manifest file
+Write-Output "Manifest:`n  $manifest_file"
+
+# Show notes
+$dir = versiondir 'current' $global
+$original_dir = versiondir $app $manifest.version $global
+$persist_dir = persistdir $app $global
+show_notes $manifest $dir $original_dir $persist_dir
+
+exit 0