Add optional component for installing the docs.

They are still installed by default, but can be manually deselected.

Author: embray

CHANGES.md

@@ -4,9 +4,19 @@ Changelog for the Windows Installer
 0.5.0 (unreleased)
 ------------------
 
+* Debug symbols, which are not needed at runtime, are stripped from most
+  binaries, resulting in a noticeably smaller install footprint.  Now the
+  installer and the installation itself are smaller despite packing in more
+  features!
+
 * Includes a copy of `git` in the SageMath Shell, so no need to install a
   separate Git or integrate an existing Git for Windows installation.
 
+* Installing the HTML documentation is now optional.  Although some help
+  features won't work without it, it saves about 600 MB of installation
+  size, and if you have an internet connection you can still read the docs
+  at doc.sagemath.org.
+
 * Updates to use a few more Cygwin system packages rather than including
   Sage-specific copies, including:
 
@@ -22,9 +32,6 @@ Changelog for the Windows Installer
   We still build our own copies of MPIR and anything that depends on it,
   as there are still too many bugs with the system GMP on Cygwin.
 
-* Debug symbols, which are not needed at runtime, are stripped from most
-  binaries, resulting in a noticeably smaller install footprint.
-
 
 0.4.3 (2019-05-06)
 ------------------

SageMath.iss

@@ -56,9 +56,12 @@
 
 #define Runtime     "{app}\runtime"
 #define Bin         Runtime + "\bin"
-#define SageRootWin Runtime + "\opt\sagemath-" + MyAppVersion
+#define SageRoot "\opt\sagemath-" + MyAppVersion
+#define SageRootWin Runtime + SageRoot
 #define SageRootPosix "/opt/sagemath-" + MyAppVersion
 
+#define SageDoc SageRoot + "\local\share\doc\sage\html"
+
 [Setup]
 AppCopyright={#MyAppPublisher}
 AppId={#MyAppName}-{#MyAppVersion}
@@ -79,6 +82,7 @@ DisableWelcomePage=no
 DiskSpanning={#DiskSpanning}
 OutputDir={#OutputDir}
 OutputBaseFilename={#MyAppName}-{#MyAppVersion}-Installer-v{#InstallerVersion}
+OutputManifestFile=SageMath-Manifest.txt
 PrivilegesRequired=lowest
 Compression={#Compression}
 SolidCompression=yes
@@ -94,14 +98,23 @@ LicenseFile="{#Source}\opt\sagemath-{#SageVersion}\COPYING.txt"
 [Languages]
 Name: "english"; MessagesFile: "compiler:Default.isl"
 
+[Types]
+Name: "full"; Description: "Full installation"
+Name: "custom"; Description: "Custom installation"; Flags: iscustom
+
+[Components]
+Name: "sage"; Description: "SageMath Core"; Types: full custom; Flags: fixed
+Name: "sagedoc"; Description: "SageMath HTML Documentation"; Types: full
+
 [Tasks]
 Name: startmenu; Description: "Create &start menu icons"; GroupDescription: "Additional icons"
 Name: desktop; Description: "Create &desktop icons"; GroupDescription: "Additional icons"
 
 [Files]
-Source: "dot_sage\*"; DestDir: "{#SageRootWin}\dot_sage"; Flags: recursesubdirs ignoreversion
-Source: "{#Source}\*"; DestDir: "{#Runtime}"; Excludes: "{#SageExcludes}"; Flags: recursesubdirs ignoreversion
-Source: "resources\sagemath.ico"; DestDir: "{app}"; Flags: ignoreversion; AfterInstall: PostInstall
+Source: "dot_sage\*"; DestDir: "{#SageRootWin}\dot_sage"; Flags: recursesubdirs ignoreversion; Components: sage
+Source: "{#Source}\*"; DestDir: "{#Runtime}"; Excludes: "{#SageExcludes},{#SageDoc}"; Flags: recursesubdirs ignoreversion; Components: sage
+Source: "{#Source}{#SageDoc}\*"; DestDir: "{#Runtime}"; Flags: recursesubdirs ignoreversion; Components: sagedoc
+Source: "resources\sagemath.ico"; DestDir: "{app}"; Flags: ignoreversion; AfterInstall: PostInstall; Components: sage
 
 ; InnoSetup will not create empty directories found when including files
 ; recursively in the [Files] section, so any directories that must exist
@@ -125,7 +138,7 @@ Name: "{#Runtime}\home\sage"; Permissions: users-modify
 Type: filesandordirs; Name: "{#Runtime}\etc\fstab.d"
 Type: filesandordirs; Name: "{#Runtime}\dev\shm"
 Type: filesandordirs; Name: "{#Runtime}\dev\mqueue"
-Type: files; Name: "{#Runtime}\*.stackdump
+Type: files; Name: "{#Runtime}\*.stackdump"
 
 #define RunSage "/bin/bash --login -c '" + SageRootPosix + "/sage'"
 #define RunSageName "SageMath " + SageVersion