Add file(MD5) command to compute cryptographic hash

Provide a CMake-language binding to the md5sum function previously
available only by "cmake -E md5sum".

7 files changed, 22 insertions, 1 deletions

diff --git a/Tests/CMakeTests/CheckCMakeTest.cmake b/Tests/CMakeTests/CheckCMakeTest.cmake
index 2e4fedd..db92905 100644
--- a/Tests/CMakeTests/CheckCMakeTest.cmake
+++ b/Tests/CMakeTests/CheckCMakeTest.cmake
@@ -12,7 +12,7 @@ function(check_cmake_test prefix)
       )
     string(REGEX REPLACE "\n" "\n out> " out " out> ${stdout}")
     string(REGEX REPLACE "\n" "\n err> " err " err> ${stderr}")
-    if(NOT "${result}" STREQUAL ${${test}-RESULT})
+    if(NOT "${result}" STREQUAL "${${test}-RESULT}")
       message(FATAL_ERROR
         "Test ${test} result is [${result}], not [${${test}-RESULT}].\n"
         "Test ${test} output:\n"
diff --git a/Tests/CMakeTests/File-MD5-BadArg1.cmake b/Tests/CMakeTests/File-MD5-BadArg1.cmake
new file mode 100644
index 0000000..ac5f67a
--- /dev/null
+++ b/Tests/CMakeTests/File-MD5-BadArg1.cmake
@@ -0,0 +1 @@
+file(MD5)
diff --git a/Tests/CMakeTests/File-MD5-BadArg2.cmake b/Tests/CMakeTests/File-MD5-BadArg2.cmake
new file mode 100644
index 0000000..68a172f
--- /dev/null
+++ b/Tests/CMakeTests/File-MD5-BadArg2.cmake
@@ -0,0 +1 @@
+file(MD5 ${CMAKE_CURRENT_LIST_DIR}/File-Copy-NoDest.cmake)
diff --git a/Tests/CMakeTests/File-MD5-BadArg4.cmake b/Tests/CMakeTests/File-MD5-BadArg4.cmake
new file mode 100644
index 0000000..a11efcb
--- /dev/null
+++ b/Tests/CMakeTests/File-MD5-BadArg4.cmake
@@ -0,0 +1 @@
+file(MD5 ${CMAKE_CURRENT_LIST_DIR}/File-Copy-NoDest.cmake md5 extra_arg)
diff --git a/Tests/CMakeTests/File-MD5-NoFile.cmake b/Tests/CMakeTests/File-MD5-NoFile.cmake
new file mode 100644
index 0000000..1b91bc8
--- /dev/null
+++ b/Tests/CMakeTests/File-MD5-NoFile.cmake
@@ -0,0 +1 @@
+file(MD5 ${CMAKE_CURRENT_LIST_DIR}/DoesNotExist.cmake md5)
diff --git a/Tests/CMakeTests/File-MD5-Works.cmake b/Tests/CMakeTests/File-MD5-Works.cmake
new file mode 100644
index 0000000..2989e98
--- /dev/null
+++ b/Tests/CMakeTests/File-MD5-Works.cmake
@@ -0,0 +1,2 @@
+file(MD5 ${CMAKE_CURRENT_LIST_DIR}/File-Copy-NoDest.cmake md5)
+message("${md5}")
diff --git a/Tests/CMakeTests/FileTest.cmake.in b/Tests/CMakeTests/FileTest.cmake.in
index b6dcaa6..3aa88a7 100644
--- a/Tests/CMakeTests/FileTest.cmake.in
+++ b/Tests/CMakeTests/FileTest.cmake.in
@@ -12,6 +12,16 @@ set(Copy-NoDest-RESULT 1)
 set(Copy-NoDest-STDERR "given no DESTINATION")
 set(Copy-NoFile-RESULT 1)
 set(Copy-NoFile-STDERR "COPY cannot find.*/does_not_exist\\.txt")
+set(MD5-NoFile-RESULT 1)
+set(MD5-NoFile-STDERR "file MD5 failed to read file")
+set(MD5-BadArg1-RESULT 1)
+set(MD5-BadArg1-STDERR "file must be called with at least two arguments")
+set(MD5-BadArg2-RESULT 1)
+set(MD5-BadArg2-STDERR "file MD5 requires a file name and output variable")
+set(MD5-BadArg4-RESULT 1)
+set(MD5-BadArg4-STDERR "file MD5 requires a file name and output variable")
+set(MD5-Works-RESULT 0)
+set(MD5-Works-STDERR "a28a44fb5b58a6acf0cbec46557bc775")
 
 include("@CMAKE_CURRENT_SOURCE_DIR@/CheckCMakeTest.cmake")
 check_cmake_test(File
@@ -22,6 +32,11 @@ check_cmake_test(File
   Copy-LateArg
   Copy-NoDest
   Copy-NoFile
+  MD5-NoFile
+  MD5-BadArg1
+  MD5-BadArg2
+  MD5-BadArg4
+  MD5-Works
   )
 
 # Also execute each test listed in FileTestScript.cmake: