Add 'about' information to `-version` output

Adds a copyright and attribution message to the `-version` output
(the same as shown in the About dialog in the GUI).

Move the message to a function LicenseInfo in init.cpp.

src/bitcoind.cpp

@@ -87,7 +87,11 @@ bool AppInit(int argc, char* argv[])
         {
             std::string strUsage = _("Bitcoin Core Daemon") + " " + _("version") + " " + FormatFullVersion() + "\n";
 
-            if (!mapArgs.count("-version"))
+            if (mapArgs.count("-version"))
+            {
+                strUsage += LicenseInfo();
+            }
+            else
             {
                 strUsage += "\n" + _("Usage:") + "\n" +
                       "  bitcoind [options]                     " + _("Start Bitcoin Core Daemon") + "\n" +

src/init.cpp

@@ -195,7 +195,6 @@ bool static Bind(const CService &addr, unsigned int flags) {
     return true;
 }
 
-// Core-specific options shared between UI, daemon and RPC client
 std::string HelpMessage(HelpMessageMode hmm)
 {
     string strUsage = _("Options:") + "\n";
@@ -330,6 +329,18 @@ std::string HelpMessage(HelpMessageMode hmm)
     return strUsage;
 }
 
+std::string LicenseInfo()
+{
+    return FormatParagraph(strprintf(_("Copyright (C) 2009-%i The Bitcoin Core Developers"), COPYRIGHT_YEAR)) + "\n" +
+           "\n" +
+           FormatParagraph(_("This is experimental software.")) + "\n" +
+           "\n" +
+           FormatParagraph(_("Distributed under the MIT/X11 software license, see the accompanying file COPYING or <http://www.opensource.org/licenses/mit-license.php>.")) + "\n" +
+           "\n" +
+           FormatParagraph(_("This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit <https://www.openssl.org/> and cryptographic software written by Eric Young and UPnP software written by Thomas Bernard.")) +
+           "\n";
+}
+
 struct CImportingNow
 {
     CImportingNow() {

src/init.h

@@ -28,6 +28,9 @@ enum HelpMessageMode
     HMM_BITCOIN_QT
 };
 
+/** Help for options shared between UI and daemon (for -help) */
 std::string HelpMessage(HelpMessageMode mode);
+/** Returns licensing information (for -version) */
+std::string LicenseInfo();
 
 #endif

src/qt/forms/aboutdialog.ui

@@ -43,76 +43,14 @@
       </spacer>
      </item>
      <item>
-      <layout class="QHBoxLayout" name="horizontalLayout">
+      <widget class="QLabel" name="versionLabel">
-       <item>
-        <widget class="QLabel" name="label">
-         <property name="cursor">
-          <cursorShape>IBeamCursor</cursorShape>
-         </property>
-         <property name="text">
-          <string>&lt;b&gt;Bitcoin Core&lt;/b&gt; version</string>
-         </property>
-         <property name="textInteractionFlags">
-          <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QLabel" name="versionLabel">
-         <property name="cursor">
-          <cursorShape>IBeamCursor</cursorShape>
-         </property>
-         <property name="text">
-          <string notr="true">0.3.666-beta</string>
-         </property>
-         <property name="textInteractionFlags">
-          <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <spacer name="horizontalSpacer">
-         <property name="orientation">
-          <enum>Qt::Horizontal</enum>
-         </property>
-         <property name="sizeHint" stdset="0">
-          <size>
-           <width>40</width>
-           <height>20</height>
-          </size>
-         </property>
-        </spacer>
-       </item>
-      </layout>
-     </item>
-     <item>
-      <widget class="QLabel" name="copyrightLabel">
-       <property name="cursor">
-        <cursorShape>IBeamCursor</cursorShape>
-       </property>
-       <property name="text">
-        <string notr="true">Copyright &amp;copy; 2009-YYYY The Bitcoin Core developers</string>
-       </property>
-       <property name="textFormat">
-        <enum>Qt::RichText</enum>
-       </property>
-       <property name="textInteractionFlags">
-        <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
-       </property>
-      </widget>
-     </item>
-     <item>
-      <widget class="QLabel" name="label_2">
        <property name="cursor">
         <cursorShape>IBeamCursor</cursorShape>
        </property>
        <property name="text">
-        <string>
+        <string notr="true">
-This is experimental software.
+(placeholder for version message)
-
+        </string>
-Distributed under the MIT/X11 software license, see the accompanying file COPYING or &lt;a href=&quot;http://www.opensource.org/licenses/mit-license.php&quot;&gt;http://www.opensource.org/licenses/mit-license.php&lt;/a&gt;.
-
-This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit (&lt;a href=&quot;https://www.openssl.org/&quot;&gt;https://www.openssl.org/&lt;/a&gt;) and cryptographic software written by Eric Young (&lt;a href=&quot;mailto:eay@cryptsoft.com&quot;&gt;eay@cryptsoft.com&lt;/a&gt;) and UPnP software written by Thomas Bernard.</string>
        </property>
        <property name="textFormat">
         <enum>Qt::RichText</enum>

src/qt/utilitydialog.cpp

@@ -16,6 +16,7 @@
 #include "util.h"
 
 #include <QLabel>
+#include <QRegExp>
 #include <QVBoxLayout>
 
 /** "About" dialog box */
@@ -24,16 +25,13 @@ AboutDialog::AboutDialog(QWidget *parent) :
     ui(new Ui::AboutDialog)
 {
     ui->setupUi(this);
-
-    // Set current copyright year
-    ui->copyrightLabel->setText(tr("Copyright") + QString(" &copy; 2009-%1 ").arg(COPYRIGHT_YEAR) + tr("The Bitcoin Core developers"));
 }
 
 void AboutDialog::setModel(ClientModel *model)
 {
     if(model)
     {
-        QString version = model->formatFullVersion();
+        QString version = tr("Bitcoin Core") + " " + tr("version") + " " + model->formatFullVersion();
         /* On x86 add a bit specifier to the version so that users can distinguish between
          * 32 and 64 bit builds. On other architectures, 32/64 bit may be more ambigious.
          */
@@ -42,7 +40,17 @@ void AboutDialog::setModel(ClientModel *model)
 #elif defined(__i386__ )
         version += " " + tr("(%1-bit)").arg(32);
 #endif
-        ui->versionLabel->setText(version);
+
+        /// HTML-format the license message from the core
+        QString licenseInfo = QString::fromStdString(LicenseInfo());
+        // Make URLs clickable
+        QRegExp uri("<(.*)>", Qt::CaseSensitive, QRegExp::RegExp2);
+        uri.setMinimal(true); // use non-greedy matching
+        licenseInfo = licenseInfo.replace(uri, "<a href=\"\\1\">\\1</a>");
+        // Replace newlines with HTML breaks
+        licenseInfo = licenseInfo.replace("\n\n", "<br><br>");
+
+        ui->versionLabel->setText(version + "<br><br>" + licenseInfo);
     }
 }
 
@@ -81,7 +89,7 @@ HelpMessageDialog::HelpMessageDialog(QWidget *parent, bool versionOnly) :
 
     // Set help message text
     if(versionOnly)
-        ui->helpMessageLabel->setText(version);
+        ui->helpMessageLabel->setText(version + "\n" + QString::fromStdString(LicenseInfo()));
     else
         ui->helpMessageLabel->setText(version + "\n" + header + "\n" + coreOptions + "\n" + uiOptions);
 }