makerepropkg: support checking multiple split packages

By specifying multiple package files, we assume they are all from the
same PKGBUILD, and try to check them all against the produced artifacts.
Since the buildinfo should be comparable for all of them, we simply use
the first one passed on the command line.

Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Levente Polyak <anthraxx@archlinux.org>

doc/makerepropkg.1.asciidoc

@@ -7,12 +7,12 @@ makerepropkg - Rebuild a package to see if it is reproducible
 
 Synopsis
 --------
-makerepropkg [OPTIONS] <package_file>
+makerepropkg [OPTIONS] <package_file>...
 
 Description
 -----------
 
-Given the path to a built pacman package, attempt to rebuild it using the
+Given the path to a built pacman package(s), attempt to rebuild it using the
 PKGBUILD in the current directory. The package will be built in an environment
 as closely matching the environment of the initial package as possible, by
 building up a chroot to match the information exposed in the package's
@@ -20,6 +20,10 @@ linkman:BUILDINFO[5] manifest. On success, the resulting package will be
 compared to the input package, and makerepropkg will report whether the
 artifacts are identical.
 
+When given multiple packages, additional package files are assumed to be split
+packages and will be treated as additional artifacts to compare during the
+verification step.
+
 This implements a verifier for pacman/libalpm packages in accordance with the
 link:https://reproducible-builds.org/[Reproducible Builds] project.
 

makerepropkg.in

@@ -117,10 +117,13 @@ check_root
 
 if [[ -n $1 ]]; then
     pkgfile="$1"
-    if ! bsdtar -tqf "${pkgfile}" .BUILDINFO >/dev/null 2>&1; then
-        error "file is not a valid pacman package: '%s'" "${pkgfile}"
-        exit 1
-    fi
+    splitpkgs=("$@")
+    for f in "${splitpkgs[@]}"; do
+        if ! bsdtar -tqf "${f}" .BUILDINFO >/dev/null 2>&1; then
+            error "file is not a valid pacman package: '%s'" "${f}"
+            exit 1
+        fi
+    done
 else
     error "no package file specified. Try '${BASH_SOURCE[0]##*/} -h' for more information. "
     exit 1
@@ -176,23 +179,26 @@ arch-nspawn "${buildroot}/${chroot}" \
     --bind="${PWD}:/startdir" \
     --bind="${SRCDEST}:/srcdest" \
     /chrootbuild -C --noconfirm --log --holdver --skipinteg
+ret=$?
 
-if (( $? == 0 )); then
+if (( ${ret} == 0 )); then
     msg2 "built succeeded! built packages can be found in ${buildroot}/${chroot}/pkgdest"
     msg "comparing artifacts..."
 
-    comparefiles=("${pkgfile}" "${buildroot}/${chroot}/pkgdest/${pkgfile##*/}")
-    if cmp -s "${comparefiles[@]}"; then
-        msg2 "Package successfully reproduced!"
-        exit 0
-    else
-        warning "Package is not reproducible. :("
-        sha256sum "${comparefiles[@]}"
-        if (( diffoscope )); then
-            diffoscope "${comparefiles[@]}"
+    for pkgfile in "${splitpkgs[@]}"; do
+        comparefiles=("${pkgfile}" "${buildroot}/${chroot}/pkgdest/${pkgfile##*/}")
+        if cmp -s "${comparefiles[@]}"; then
+            msg2 "Package '%s' successfully reproduced!" "${pkgfile}"
+        else
+            ret=1
+            warning "Package '%s' is not reproducible. :(" "${pkgfile}"
+            sha256sum "${comparefiles[@]}"
+            if (( diffoscope )); then
+                diffoscope "${comparefiles[@]}"
+            fi
         fi
-    fi
+    done
 fi
 
-# the package either failed to build, or was unreproducible
-exit 1
+# return failure from chrootbuild, or the reproducibility status
+exit ${ret}