#!/usr/bin/make -f
include /usr/share/dpkg/pkg-info.mk
include /usr/share/dpkg/architecture.mk

# Upstream version without the +ds repack suffix, and its series (2.13).
VERSION = $(firstword $(subst +, ,$(DEB_VERSION_UPSTREAM)))
SERIES = $(word 1,$(subst ., ,$(VERSION))).$(word 2,$(subst ., ,$(VERSION)))

# Two-pass self-host build (no sbt):
#   pass 1 STARR = scala-2.13 from the archive (Build-Depends), or, for the
#                  one-time bootstrap with the pkg.scala.stage0 profile,
#                  upstream's pinned STARR jars from $(SCALA_STAGE0)
#   pass 2 STARR = the pass-1 output; only pass-2 jars are shipped
# The 2.13.17 STARR cannot compile the 2.13.18 library on JDK >= 26
# (Comparator max/min clash), so the stage0 build uses JDK 25; 2.13.18 itself
# handles newer JDKs, so normal builds use default-jdk.
SCALA_STAGE0 ?= /usr/share/scala-2.13-stage0
ifneq ($(filter pkg.scala.stage0,$(DEB_BUILD_PROFILES)),)
STARR0_JARS = $(SCALA_STAGE0)/scala-library.jar $(SCALA_STAGE0)/scala-reflect.jar $(SCALA_STAGE0)/scala-compiler.jar
export JAVA_HOME = /usr/lib/jvm/java-25-openjdk-$(DEB_HOST_ARCH)
else
STARR0_JARS = /usr/share/java/scala-library-$(SERIES).jar /usr/share/java/scala-reflect-$(SERIES).jar /usr/share/java/scala-compiler-$(SERIES).jar
export JAVA_HOME = /usr/lib/jvm/default-java
endif
export PATH := $(JAVA_HOME)/bin:$(PATH)

# Version-independent aliases of the build dependencies.
ASM = /usr/share/maven-repo/org/scala-lang/modules/scala-asm/debian/scala-asm-debian.jar
JLINE3 = /usr/share/java/jline3.jar

SEED = $(CURDIR)/debian/starr0
STARR1 = $(CURDIR)/debian/starr1
OUT1 = $(CURDIR)/debian/buildout1
OUT2 = $(CURDIR)/debian/buildout2
J2 = $(OUT2)/jars
MAN = $(CURDIR)/debian/manout
DRV = sh debian/build-driver.sh
CMDS = scala scalac scaladoc fsc scalap

D = debian/scala-2.13
DLIB = debian/scala-library-2.13
SD = /usr/share/scala-$(SERIES)

%:
	dh $@

override_dh_auto_build:
	# Stage the pass-1 STARR (build-time only, never shipped). The three
	# jars are copied under the names the driver expects.
	rm -rf $(SEED) && mkdir -p $(SEED)/lib
	set -e; for j in $(STARR0_JARS); do \
	  n=$$(basename $$j | sed -E 's/-$(SERIES)\.jar$$/.jar/'); \
	  cp -L $$j $(SEED)/lib/$$n; \
	done
	# Pass 1: build the jars from that STARR.
	$(DRV) $(CURDIR) $(SEED) $(ASM) $(JLINE3) $(OUT1) $(VERSION)
	# Pass 2: self-host from the pass-1 jars.
	rm -rf $(STARR1) && mkdir -p $(STARR1)/lib
	cp $(OUT1)/jars/scala-library.jar $(OUT1)/jars/scala-reflect.jar \
	   $(OUT1)/jars/scala-compiler.jar $(STARR1)/lib/
	$(DRV) $(CURDIR) $(STARR1) $(ASM) $(JLINE3) $(OUT2) $(VERSION)
	# Manual pages from upstream's sources in src/manual, compiled and run
	# with the pass-2 compiler.
	rm -rf $(MAN) && mkdir -p $(MAN)/classes
	java -cp $(J2)/scala-library.jar:$(J2)/scala-reflect.jar:$(J2)/scala-compiler.jar:$(ASM) \
	  scala.tools.nsc.Main -nowarn -d $(MAN)/classes -classpath $(J2)/scala-library.jar \
	  src/manual/scala/tools/docutil/ManPage.scala \
	  src/manual/scala/tools/docutil/EmitManPage.scala \
	  src/manual/scala/man1/*.scala
	set -e; for c in $(CMDS); do \
	  java -cp $(MAN)/classes:$(J2)/scala-library.jar \
	    scala.tools.docutil.EmitManPage scala.man1.$$c $(MAN)/$$c.1; \
	done
	# POMs for the Maven repository (installed by maven-repo-helper).
	for p in scala-library scala-reflect scala-compiler; do \
	  sed "s/@VERSION@/$(VERSION)/g" debian/poms/$$p.pom.xml.in > debian/poms/$$p.pom.xml; \
	done

override_dh_auto_test:

override_dh_auto_install:
	# scala-library, scala-reflect and scala-compiler are installed by
	# maven-repo-helper (debian/*.poms) as /usr/share/java/<name>-$(VERSION).jar
	# and in /usr/share/maven-repo; no unversioned names, which belong to
	# the default Scala (the scala and scala-library packages).
	install -d $(D)/usr/share/java
	install -m644 $(J2)/scalap.jar $(D)/usr/share/java/scalap-$(VERSION).jar
	install -d $(D)$(SD)/bin
	install -m755 debian/scalac $(D)$(SD)/bin/scalac
	install -m755 debian/scala-runner $(D)$(SD)/bin/scala
	install -m755 debian/scaladoc $(D)$(SD)/bin/scaladoc
	install -m755 debian/fsc $(D)$(SD)/bin/fsc
	install -m755 debian/scalap-wrapper $(D)$(SD)/bin/scalap
	install -d $(D)$(SD)/man/man1
	set -e; for c in $(CMDS); do \
	  install -m644 $(MAN)/$$c.1 $(D)$(SD)/man/man1/$$c.1; \
	done
	gzip -9n $(D)$(SD)/man/man1/*.1

execute_after_dh_link:
	# Series links (<name>-2.13.jar), and the commands as <cmd>-2.13.
	dh_link -pscala-library-2.13 \
	  usr/share/java/scala-library-$(VERSION).jar usr/share/java/scala-library-$(SERIES).jar \
	  usr/share/java/scala-reflect-$(VERSION).jar usr/share/java/scala-reflect-$(SERIES).jar
	dh_link -pscala-2.13 \
	  usr/share/java/scala-compiler-$(VERSION).jar usr/share/java/scala-compiler-$(SERIES).jar \
	  usr/share/java/scalap-$(VERSION).jar usr/share/java/scalap-$(SERIES).jar
	set -e; for c in $(CMDS); do \
	  dh_link -pscala-2.13 $(SD)/bin/$$c usr/bin/$$c-$(SERIES); \
	  dh_link -pscala-2.13 $(SD)/man/man1/$$c.1.gz usr/share/man/man1/$$c-$(SERIES).1.gz; \
	done

override_dh_auto_clean:
	rm -rf debian/buildout1 debian/buildout2 debian/starr0 debian/starr1 \
	  debian/manout debian/poms/*.pom.xml