change how installed clang hashes are stored on disk

Summary:
Change the hash stored to be the same as output of "--clang-hash". This change simplifies future work with building clang from alternative sources.

Also remove outdated src/checksums.txt

Reviewed By: jvillard

Differential Revision: D24016467

fbshipit-source-id: 3c24ff029

facebook-clang-plugins/clang/setup.sh

@@ -10,7 +10,6 @@ set -e
 set -o pipefail
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-SCRIPT_RELATIVE_PATH="$(basename "${BASH_SOURCE[0]}")"
 CLANG_RELATIVE_SRC="src/download/llvm"
 CLANG_SRC="$SCRIPT_DIR/$CLANG_RELATIVE_SRC"
 CLANG_PREBUILD_PATCHES=(
@@ -49,15 +48,22 @@ clang_hash () {
 
 check_installed () {
     pushd "$SCRIPT_DIR" > /dev/null
-    $SHASUM -c "$CLANG_INSTALLED_VERSION_FILE" >& /dev/null
-    local result=$?
+    HASH=$(clang_hash)
+    RESULT=1
+    if [ -f "$CLANG_INSTALLED_VERSION_FILE" ]; then
+        FILE_HASH=$(cat "$CLANG_INSTALLED_VERSION_FILE")
+        if [ "$HASH" == "$FILE_HASH" ]; then
+            RESULT=0
+        fi
+    fi
     popd > /dev/null
-    return $result
+    return $RESULT
 }
 
 record_installed () {
     pushd "$SCRIPT_DIR" > /dev/null
-    $SHASUM setup.sh src/prepare_clang_src.sh > "$CLANG_INSTALLED_VERSION_FILE"
+    HASH=$(clang_hash)
+    echo $HASH > "$CLANG_INSTALLED_VERSION_FILE"
     popd > /dev/null
 }
 

facebook-clang-plugins/clang/src/checksums.txt

@@ -1,31 +0,0 @@
-= LLVM+Clang 9.0.0 -- official release
-
-Downloaded from http://releases.llvm.org/download.html#9.0.0
-
-Included components:
-$ sha256sum *.tar.xz
-7ba81eef7c22ca5da688fdf9d88c20934d2d6b40bfe150ffd338900890aa4610  cfe-9.0.0.src.tar.xz
-56e4cd96dd1d8c346b07b4d6b255f976570c6f2389697347a6c3dcb9e820d10e  compiler-rt-9.0.0.src.tar.xz
-3c4162972b5d3204ba47ac384aa456855a17b5e97422723d4758251acf1ed28c  libcxx-9.0.0.src.tar.xz
-675041783565c906ac2f7f8b2bc5c40f14d871ecfa8ade34855aa18de95530e9  libcxxabi-9.0.0.src.tar.xz
-d6a0565cf21f22e9b4353b2eb92622e8365000a9e90a16b09b56f8157eabfe84  llvm-9.0.0.src.tar.xz
-9979eb1133066376cc0be29d1682bc0b0e7fb541075b391061679111ae4d3b5b  openmp-9.0.0.src.tar.xz
-
-Script to build the archive:
-
-tar xf llvm-9.0.0.src.tar.xz
-cd llvm-9.0.0.src/tools/
-tar xf ../../cfe-9.0.0.src.tar.xz
-mv cfe-9.0.0.src/ clang
-cd ../projects/
-tar xf ../../compiler-rt-9.0.0.src.tar.xz
-mv compiler-rt-9.0.0.src/ compiler-rt
-tar xf ../../libcxx-9.0.0.src.tar.xz
-mv libcxx-9.0.0.src/ libcxx
-tar xf ../../libcxxabi-9.0.0.src.tar.xz
-mv libcxxabi-9.0.0.src/ libcxxabi
-tar xf ../../openmp-9.0.0.src.tar.xz
-mv openmp-9.0.0.src/ openmp
-cd ../..
-mv llvm-9.0.0.src llvm
-tar cJ llvm > llvm_clang_compiler-rt_libcxx_libcxxabi_openmp-9.0.0.tar.xz