From b41f45a623e0e1ddb858970172315830770bc3eb Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 30 Mar 2020 14:06:50 +0200
Subject: Make symlinks to actual binaries rather than backlinks in bootstrap
 script

---
 bootstrap | 42 +++++++++++++++++++++++++-----------------
 1 file changed, 25 insertions(+), 17 deletions(-)

diff --git a/bootstrap b/bootstrap
index 7a1291b..4eb33ff 100755
--- a/bootstrap
+++ b/bootstrap
@@ -176,6 +176,9 @@ while [ $# -gt 0 ]; do
   esac
 done
 
+cfg_bs="$cfg-asan-bs"
+cfg_pm="$cfg-asan-pm"
+
 function git_clone () # <url>
 {
   local u d l
@@ -238,43 +241,43 @@ run mkdir -p builds
 #
 #   2. Only building shared libraries for speed of development.
 #
-run bpkg create -d "builds/$cfg-asan-bs" cc ?cli \
+run bpkg create -d "builds/$cfg_bs" cc ?cli \
   config.cxx="$cxx" \
   config.cc.coptions="-Wall -Wextra -Werror -g3 -fsanitize=address -fsanitize=undefined -fno-omit-frame-pointer" \
   config.cc.loptions="-fuse-ld=gold -Wl,--threads,--thread-count,4" \
   config.bin.lib=shared \
   config.install.root=/tmp/install config.dist.root=/tmp/dist
 
-run bdep init -d libbutl -A "builds/$cfg-asan-bs" "@$cfg-asan-bs" --no-default
-run bdep init -d build2  -A "builds/$cfg-asan-bs" "@$cfg-asan-bs"
+run bdep init -d libbutl -A "builds/$cfg_bs" "@$cfg_bs" --no-default
+run bdep init -d build2  -A "builds/$cfg_bs" "@$cfg_bs"
 
 run b build2/build2/
 run build2/build2/b --version
 
 # Package manager (and the rest of the toolchain) configuration.
 #
-run bpkg create -d "builds/$cfg-asan-pm" cc cli \
+run bpkg create -d "builds/$cfg_pm" cc cli \
   config.cxx="$cxx" \
   config.cc.coptions="-Wall -Wextra -Werror -g3 -fsanitize=address -fsanitize=undefined -fno-omit-frame-pointer" \
   config.cc.loptions="-fuse-ld=gold -Wl,--threads,--thread-count,4" \
   config.bin.lib=shared \
   config.install.root=/tmp/install config.dist.root=/tmp/dist
 
-run bdep init -d libbutl -A "builds/$cfg-asan-pm" "@$cfg-asan-pm" --default
-run bdep init -d libbpkg -A "builds/$cfg-asan-pm" "@$cfg-asan-pm"
-run bdep init -d bpkg    -A "builds/$cfg-asan-pm" "@$cfg-asan-pm"
-run bdep init -d bdep    -A "builds/$cfg-asan-pm" "@$cfg-asan-pm"
+run bdep init -d libbutl -A "builds/$cfg_pm" "@$cfg_pm" --default
+run bdep init -d libbpkg -A "builds/$cfg_pm" "@$cfg_pm"
+run bdep init -d bpkg    -A "builds/$cfg_pm" "@$cfg_pm"
+run bdep init -d bdep    -A "builds/$cfg_pm" "@$cfg_pm"
 
 # Generate database support (currently and temporarily handled with a script).
 #
 # Note: this has to be done after bdep-init since we need the libodb headers.
 #       We also have to pre-update version headers.
 #
-run bpkg update -d builds/$cfg-asan-pm libodb
-run b "builds/$cfg-asan-pm/libbutl/libbutl/hxx{version}"
-run b "builds/$cfg-asan-pm/libbpkg/libbpkg/hxx{version}"
-run b "builds/$cfg-asan-pm/bpkg/bpkg/hxx{version common-options}"
-run b "builds/$cfg-asan-pm/bdep/bdep/hxx{version common-options project-options}"
+run bpkg update -d "builds/$cfg_pm" libodb
+run b "builds/$cfg_pm/libbutl/libbutl/hxx{version}"
+run b "builds/$cfg_pm/libbpkg/libbpkg/hxx{version}"
+run b "builds/$cfg_pm/bpkg/bpkg/hxx{version common-options}"
+run b "builds/$cfg_pm/bdep/bdep/hxx{version common-options project-options}"
 
 run cd bpkg/bpkg
 run ./odb.sh
@@ -291,10 +294,15 @@ run bdep/bdep/bdep --version
 # Add symlinks.
 #
 if [ "$sym" ]; then
-  run sudo ln -s "$owd/build2/build2/b"      /usr/local/bin/b
-  run sudo ln -s "$owd/build2/build2/b-boot" /usr/local/bin/b-boot
-  run sudo ln -s "$owd/bpkg/bpkg/bpkg"       /usr/local/bin/bpkg
-  run sudo ln -s "$owd/bdep/bdep/bdep"       /usr/local/bin/bdep
+  # Note that we symlink the actual executable in the build configuration
+  # rather than the backlink in the forwarded source to make the old binary
+  # runnable in the face of compilation errors (which trigger the removal of
+  # backlinks).
+  #
+  run sudo ln -s "$owd/build2/build2/b-boot"            /usr/local/bin/b-boot
+  run sudo ln -s "$owd/$builds/$cfg_bs/build2/build2/b" /usr/local/bin/b
+  run sudo ln -s "$owd/$builds/$cfg_pm/bpkg/bpkg/bpkg"  /usr/local/bin/bpkg
+  run sudo ln -s "$owd/$builds/$cfg_pm/bdep/bdep/bdep"  /usr/local/bin/bdep
 
   run export PATH="/usr/local/bin:$PATH"
   run which b bpkg bdep
-- 
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