# -*- sh -*-
# Build script to construct a full distribution directory of PuTTY.

module putty

# Start by figuring out what our version information looks like.
#
# There are four classes of PuTTY build:
#  - a release, which just has an X.YY version number
#  - a prerelease, which has an X.YY version number, plus a date and
#    version control commit id (and is considered to be 'almost'
#    version X.YY)
#  - a development snapshot, which just has a date and commit id
#  - a custom build, which also has a date and commit id (but is
#    labelled differently, to stress that development snapshots are
#    built from the checked-in code by the automated nightly script
#    whereas custom builds are made manually, perhaps from uncommitted
#    changes, e.g. to send to a user for diagnostic or testing
#    purposes).
#
# The four classes of build are triggered by invoking bob with
# different command-line variable definitions:
#
#  - RELEASE=X.YY makes a release build
#  - PRERELEASE=X.YY makes a prerelease build (combined with the build
#    date and VCS info)
#  - setting SNAPSHOT to any non-empty string makes a development
#    snapshot
#  - setting none of these makes a custom build.

# If we need a date for our build, start by computing it in the
# various forms we need. $(Ndate) is the date in purely numeric form
# (YYYYMMDD); $(Date) is separated as YYYY-MM-DD; $(Days) is the
# number of days since the epoch.
ifeq "$(RELEASE)" "" set Ndate $(!builddate)
ifneq "$(Ndate)" "" in . do echo $(Ndate) | perl -pe 's/(....)(..)(..)/$$1-$$2-$$3/' > date
ifneq "$(Ndate)" "" read Date date
set Epoch 15746 # update this at every release
ifneq "$(Ndate)" "" in . do echo $(Ndate) | perl -ne 'use Time::Local; /(....)(..)(..)/ and print timegm(0,0,0,$$3,$$2-1,$$1) / 86400 - $(Epoch)' > days
ifneq "$(Ndate)" "" read Days days

# For any non-release, we're going to need the number of the prior
# release, for putting in various places so as to get monotonic
# comparisons with the surrounding actual releases.
ifeq "$(RELEASE)" "" read Lastver putty/LATEST.VER

# Set up the textual version strings for the docs build and installer.
# We have one of these including the word 'PuTTY', and one without,
# which are inconveniently capitalised differently.
ifneq "$(RELEASE)" "" set Puttytextver PuTTY release $(RELEASE)
ifneq "$(RELEASE)" "" set Textver Release $(RELEASE)
ifneq "$(PRERELEASE)" "" set Puttytextver PuTTY pre-release $(PRERELEASE):$(Date).$(vcsid)
ifneq "$(PRERELEASE)" "" set Textver Pre-release $(PRERELEASE):$(Date).$(vcsid)
ifneq "$(SNAPSHOT)" "" set Puttytextver PuTTY development snapshot $(Date).$(vcsid)
ifneq "$(SNAPSHOT)" "" set Textver Development snapshot $(Date).$(vcsid)
ifeq "$(RELEASE)$(PRERELEASE)$(SNAPSHOT)" "" set Puttytextver PuTTY custom build $(Date).$(vcsid)
ifeq "$(RELEASE)$(PRERELEASE)$(SNAPSHOT)" "" set Textver Custom build $(Date).$(vcsid)
set Docmakever VERSION="$(Puttytextver)"

# Set up the version string for use in the SSH connection greeting.
#
# We use $(Ndate) rather than $(Date) in the pre-release string to
# make sure it's under 40 characters, which is a hard limit in the SSH
# protocol spec (and enforced by a compile-time assertion in
# version.c).
ifneq "$(RELEASE)" "" set Sshver PuTTY-Release-$(RELEASE)
ifneq "$(PRERELEASE)" "" set Sshver PuTTY-Prerelease-$(PRERELEASE):$(Ndate).$(vcsid)
ifneq "$(SNAPSHOT)" "" set Sshver PuTTY-Snapshot-$(Date).$(vcsid)
ifeq "$(RELEASE)$(PRERELEASE)$(SNAPSHOT)" "" set Sshver PuTTY-Custom-$(Date).$(vcsid)

# Set up the filename suffix for the Unix source archive.
ifneq "$(RELEASE)" "" set Uxarcsuffix -$(RELEASE)
ifneq "$(PRERELEASE)" "" set Uxarcsuffix -$(PRERELEASE)~pre$(Ndate).$(vcsid)
ifneq "$(SNAPSHOT)" "" set Uxarcsuffix -$(Lastver)-$(Date).$(vcsid)
ifeq "$(RELEASE)$(PRERELEASE)$(SNAPSHOT)" "" set Uxarcsuffix -custom-$(Date).$(vcsid)

# Set up the version number for the autoconf system.
ifneq "$(RELEASE)" "" set Autoconfver $(RELEASE)
ifneq "$(PRERELEASE)" "" set Autoconfver $(PRERELEASE)~pre$(Ndate).$(vcsid)
ifneq "$(SNAPSHOT)" "" set Autoconfver $(Lastver)-$(Date).$(vcsid)
ifeq "$(RELEASE)$(PRERELEASE)$(SNAPSHOT)" "" set Autoconfver Custom.$(Date).$(vcsid)

# Set up the filename for the Windows installer.
ifneq "$(RELEASE)" "" set Ifilename putty-$(RELEASE)-installer.exe
ifneq "$(PRERELEASE)" "" set Ifilename putty-$(PRERELEASE)-pre$(Ndate)-installer.exe
ifneq "$(SNAPSHOT)" "" set Ifilename putty-$(Date)-installer.exe
ifeq "$(RELEASE)$(PRERELEASE)$(SNAPSHOT)" "" set Ifilename putty-custom-$(Date)-installer.exe

# Set up the version string for the Windows installer.
ifneq "$(RELEASE)" "" set Iversion $(RELEASE)
ifneq "$(PRERELEASE)" "" set Iversion $(PRERELEASE)-pre$(Ndate).$(vcsid)
ifneq "$(SNAPSHOT)" "" set Iversion $(Date).$(vcsid)
ifeq "$(RELEASE)$(PRERELEASE)$(SNAPSHOT)" "" set Iversion Custom-$(Date).$(vcsid)

# Set up the Windows version resource info, for both the installer and
# the individual programs. This must be a sequence of four 16-bit
# integers compared lexicographically, and we define it as follows:
#
#   For release X.YY:                             X.YY.0.0
#   For a prerelease before the X.YY release:     (X.YY-1).(DDDDD + 0x8000).0
#   For a devel snapshot after the X.YY release:  X.YY.DDDDD.0
#   For a custom build:                           X.YY.DDDDD.1
#
# where DDDDD is a representation of the build date, in the form of a
# number of days since an epoch date. The epoch is reset at every
# release (which, with 15 bits, gives us a comfortable 80-odd years
# before it becomes vital to make another release to reset the count
# :-).

ifneq "$(RELEASE)" "" in . do echo $(RELEASE).0.0 > winver
ifneq "$(PRERELEASE)" "" in . do perl -e 'printf "%s.%d.0", $$ARGV[0], 0x8000+$$ARGV[1]' $(Lastver) $(Days) > winver
ifneq "$(SNAPSHOT)" "" in . do perl -e 'printf "%s.%d.0", $$ARGV[0], $$ARGV[1]' $(Lastver) $(Days) > winver
ifeq "$(RELEASE)$(PRERELEASE)$(SNAPSHOT)" "" in . do perl -e 'printf "%s.%d.1", $$ARGV[0], $$ARGV[1]' $(Lastver) $(Days) > winver
in . do perl -pe 'y!.!,!' winver > winvercommas
read Winver winver
read Winvercommas winvercommas

# Write out a version.h that contains the real version number.
in putty do echo '/* Generated by automated build script */' > version.h
ifneq "$(RELEASE)" "" in putty do echo '$#define RELEASE $(RELEASE)' >> version.h
ifneq "$(PRERELEASE)" "" in putty do echo '$#define PRERELEASE $(PRERELEASE)' >> version.h
ifneq "$(SNAPSHOT)" "" in putty do echo '$#define SNAPSHOT' >> version.h
in putty do echo '$#define TEXTVER "$(Textver)"' >> version.h
in putty do echo '$#define SSHVER "$(Sshver)"' >> version.h
in putty do echo '$#define BINARY_VERSION $(Winvercommas)' >> version.h

# Set up the extra arguments for the main Windows nmake command. The
# user can define XFLAGS and MAKEARGS on the bob command line, to pass
# in extra compile and make options respectively (e.g. to do a
# debugging or Minefield build).
set Makeargs
ifneq "$(XFLAGS)" "" set Makeargs $(Makeargs) XFLAGS="$(XFLAGS)"
ifneq "$(MAKEARGS)" "" set Makeargs $(Makeargs) $(MAKEARGS)

in putty do ./mksrcarc.sh
in putty do ./mkunxarc.sh '$(Autoconfver)' '$(Uxarcsuffix)' $(Docmakever)
in putty do perl mkfiles.pl
in putty/doc do make $(Docmakever) putty.hlp
in putty/doc do make $(Docmakever) chm

# Munge the installer script locally so that it reports the version
# we're really building.
in putty/windows do perl -i~ -pe 'BEGIN{$$a=shift@ARGV;}s/^(AppVerName=).*$$/$$1$$a/' '$(Puttytextver)' putty.iss
in putty/windows do perl -i~ -pe 'BEGIN{$$a=shift@ARGV;}s/^(VersionInfoTextVersion=).*$$/$$1$$a/' '$(Textver)' putty.iss
in putty/windows do perl -i~ -pe 'BEGIN{$$a=shift@ARGV;}s/^(AppVersion=).*$$/$$1$$a/' '$(Iversion)' putty.iss
in putty/windows do perl -i~ -pe 'BEGIN{$$a=shift@ARGV;}s/^(VersionInfoVersion=)\d+\.\d+\.\d+\.\d+\r?$$/$$1$$a/' '$(Winver)' putty.iss

# Windowsify LICENCE, since it's going in the Windows installer.
in putty do perl -i~ -pe 'y/\015//d;s/$$/\015/' LICENCE

delegate windows
  # FIXME: Cygwin alternative?
  in putty/windows do/win vcvars32 && nmake -f Makefile.vc $(Makeargs)
  # Code-sign the binaries, if the local bob config provides a script
  # to do so. We assume here that the script accepts an -i option to
  # provide a 'more info' URL, and an optional -n option to provide a
  # program name, and that it can take multiple .exe filename
  # arguments and sign them all in place.
  ifneq "$(winsigncode)" "" in putty/windows do $(winsigncode) -i http://www.chiark.greenend.org.uk/~sgtatham/putty/ *.exe
  # Ignore exit code from hhc, in favour of seeing whether the .chm
  # file was created. (Yuck; but hhc appears to return non-zero
  # exit codes on whim.)
  in putty/doc do/win hhc putty.hhp & type putty.chm >nul
  in putty/windows do/win iscc putty.iss
  ifneq "$(winsigncode)" "" in putty/windows do $(winsigncode) -i http://www.chiark.greenend.org.uk/~sgtatham/putty/ -n "PuTTY Installer" Output/setup.exe
  return putty/windows/*.exe
  return putty/windows/*.map
  return putty/doc/putty.chm
  return putty/windows/Output/setup.exe
enddelegate
in putty/doc do make mostlyclean
in putty/doc do make $(Docmakever)
in putty/windows do zip -k -j putty.zip `ls *.exe | grep -v puttytel` ../doc/putty.chm ../doc/putty.hlp ../doc/putty.cnt
in putty/doc do zip puttydoc.zip *.html

# Deliver the actual PuTTY release directory into a subdir `putty'.
deliver putty/windows/*.exe putty/x86/$@
deliver putty/windows/putty.zip putty/x86/$@
deliver putty/windows/Output/setup.exe putty/x86/$(Ifilename)
deliver putty/doc/puttydoc.zip putty/$@
deliver putty/doc/putty.chm putty/$@
deliver putty/doc/putty.hlp putty/$@
deliver putty/doc/putty.cnt putty/$@
deliver putty/doc/puttydoc.txt putty/$@
deliver putty/doc/*.html putty/htmldoc/$@
deliver putty/putty-src.zip putty/$@
deliver putty/*.tar.gz putty/$@

# Deliver the map files alongside the `proper' release deliverables.
deliver putty/windows/*.map maps-x86/$@

# Deliver sign.sh, so that whoever has just built PuTTY (the
# snapshot scripts or me, depending) can conveniently sign it with
# whatever key they want.
deliver putty/sign.sh $@

# Create files of cryptographic checksums, which will be signed along
# with the files they verify. We've provided MD5 checksums for a
# while, but now MD5 is looking iffy, we're expanding our selection.
#
# Creating these files is most easily done in the destination
# directory, where all the files we're delivering are already in their
# final relative layout.
in-dest putty do a=`\find * -type f -print`; md5sum $$a > md5sums && sha1sum $$a > sha1sums && sha256sum $$a > sha256sums && sha512sum $$a > sha512sums

# And construct .htaccess files. One in the top-level directory,
# setting the MIME types for Windows help files and providing an
# appropriate link to the source archive:
in-dest putty do echo "AddType application/octet-stream .chm" >> .htaccess
in-dest putty do echo "AddType application/octet-stream .hlp" >> .htaccess
in-dest putty do echo "AddType application/octet-stream .cnt" >> .htaccess
in-dest putty do set -- putty*.tar.gz; for k in '' .gpg; do echo RedirectMatch temp '(.*/)'putty.tar.gz$$k\$$ '$$1'"$$1$$k" >> .htaccess; done
# And one in the x86 directory, providing a link for the installer.
in-dest putty/x86 do set -- putty*installer.exe; for k in '' .gpg; do echo RedirectMatch temp '(.*/)'putty-installer.exe$$k\$$ '$$1'"$$1$$k" >> .htaccess; done