Merge #18556: build: Drop make dist in gitian builds

2aa48edec0 refactor: Drop unused ${WRAP_DIR}/${HOST} directory (Hennadii Stepanov)
1362be0447 build: Drop make dist in gitian builds (Hennadii Stepanov)

Pull request description:

  After the merge of #18331, the packaged source tarball is created by `git archive`, but the binaries are built from another one which is made by `make dist`.

  With this PR the only source tarball, created by `git archive`, is used both for binaries building and for packaging to users.

  Close #16588.
  Close #18547.

  As a good side-effect, #18349 becomes redundant.

  **Change in behavior**

  The following variables 1b151e3ffc/configure.ac (L2-L6)

  are no longer used for naming of directories and tarballs.

  Instead of them the gitian descriptors use a git tag (if available) or a commit hash.

  ---

  Also a small refactor commit picked from #18404.

ACKs for top commit:
  dongcarl:
    ACK 2aa48edec0
  MarcoFalke:
    ACK 2aa48edec0
  fanquake:
    ACK 2aa48edec0 - I've had a quick look over this, and don't want to block merging if this actually gets as closer to finally having this all sorted out. Obviously we've still got #18741, and after speaking to Carl this morning, there will likely be even more changes after that (not Guix specific).

Tree-SHA512: d3b16f87e48d1790a3264940c28acd5d881bfd10f3ce94fb0c8a6af76d8039289d01e0cd4972adac49ae24362857251f6c1e5e09e3e9fbf636c10708b4015a7c

contrib/gitian-descriptors/gitian-linux.yml

@@ -140,18 +140,12 @@ script: |
   create_per-host_faketime_wrappers "${REFERENCE_DATETIME}"
   export PATH=${WRAP_DIR}:${PATH}
 
-  # Create the release tarball using (arbitrarily) the first host
-  ./autogen.sh
-  CONFIG_SITE=${BASEPREFIX}/$(echo "${HOSTS}" | awk '{print $1;}')/share/config.site ./configure --prefix=/
-  make dist
-  SOURCEDIST=$(echo bitcoin-*.tar.gz)
-  DISTNAME=${SOURCEDIST/%.tar.gz}
-
-  # Workaround for tarball not building with the bare tag version (prep)
-  make -C src obj/build.h
+  # Create the git archive, and define DISTNAME and GIT_ARCHIVE variables.
+  # shellcheck source=contrib/gitian-descriptors/make_git_archive
+  source contrib/gitian-descriptors/make_git_archive
 
   ORIGPATH="$PATH"
-  # Extract the release tarball into a dir for each host and build
+  # Extract the git archive into a dir for each host and build
   for i in ${HOSTS}; do
     export PATH=${BASEPREFIX}/${i}/native/bin:${ORIGPATH}
     if [ "${i}" = "riscv64-linux-gnu" ]; then
@@ -165,13 +159,9 @@ script: |
     cd distsrc-${i}
     INSTALLPATH="${PWD}/installed/${DISTNAME}"
     mkdir -p ${INSTALLPATH}
-    tar --strip-components=1 -xf ../$SOURCEDIST
-
-    # Workaround for tarball not building with the bare tag version
-    echo '#!/bin/true' >share/genbuild.sh
-    mkdir src/obj
-    cp ../src/obj/build.h src/obj/
+    tar -xf $GIT_ARCHIVE
 
+    ./autogen.sh
     CONFIG_SITE=${BASEPREFIX}/${i}/share/config.site ./configure --prefix=/ --disable-ccache --disable-maintainer-mode --disable-dependency-tracking ${CONFIGFLAGS} CFLAGS="${HOST_CFLAGS}" CXXFLAGS="${HOST_CXXFLAGS}" LDFLAGS="${HOST_LDFLAGS}"
     make ${MAKEOPTS}
     make ${MAKEOPTS} -C src check-security
@@ -183,12 +173,9 @@ script: |
     rm -rf ${DISTNAME}/lib/pkgconfig
     find ${DISTNAME}/bin -type f -executable -print0 | xargs -0 -n1 -I{} ../contrib/devtools/split-debug.sh {} {} {}.dbg
     find ${DISTNAME}/lib -type f -print0 | xargs -0 -n1 -I{} ../contrib/devtools/split-debug.sh {} {} {}.dbg
-    cp ../../README.md ${DISTNAME}/
+    cp ../README.md ${DISTNAME}/
     find ${DISTNAME} -not -name "*.dbg" | sort | tar --mtime="$REFERENCE_DATETIME" --no-recursion --mode='u+rw,go+r-w,a+X' --owner=0 --group=0 -c -T - | gzip -9n > ${OUTDIR}/${DISTNAME}-${i}.tar.gz
     find ${DISTNAME} -name "*.dbg" | sort | tar --mtime="$REFERENCE_DATETIME" --no-recursion --mode='u+rw,go+r-w,a+X' --owner=0 --group=0 -c -T - | gzip -9n > ${OUTDIR}/${DISTNAME}-${i}-debug.tar.gz
     cd ../../
     rm -rf distsrc-${i}
   done
-
-  mkdir -p ${OUTDIR}/src
-  git archive --output=${OUTDIR}/src/${DISTNAME}.tar.gz HEAD