Added download status, added comparison by hash sum (#474)

Add [SPDX][1] licensing/copyright tags to the `get_cpm.cmake` script,
so that anybody that copies the `get_cpm.cmake` script into their repo
(following the instructions in the README.md)
will automatically comply with CPM's MIT license.

[1]: https://spdx.dev/

.cmake-format

@@ -1,74 +1,5 @@
+include: ["cmake/.cmake-format-additional_commands-cpm"]
 format:
   tab_size: 2
   line_width: 100
   dangle_parens: true
-
-parse:
-  additional_commands:
-    cpmaddpackage:
-      pargs:
-        nargs: '*'
-        flags: []
-      spelling: CPMAddPackage
-      kwargs: &cpmaddpackagekwargs
-        NAME: 1
-        FORCE: 1
-        VERSION: 1
-        GIT_TAG: 1
-        DOWNLOAD_ONLY: 1
-        GITHUB_REPOSITORY: 1
-        GITLAB_REPOSITORY: 1
-        GIT_REPOSITORY: 1
-        SVN_REPOSITORY: 1
-        SVN_REVISION: 1
-        SOURCE_DIR: 1
-        DOWNLOAD_COMMAND: 1
-        FIND_PACKAGE_ARGUMENTS: 1
-        NO_CACHE: 1
-        GIT_SHALLOW: 1
-        URL: 1
-        URL_HASH: 1
-        URL_MD5: 1
-        DOWNLOAD_NAME: 1
-        DOWNLOAD_NO_EXTRACT: 1
-        HTTP_USERNAME: 1
-        HTTP_PASSWORD: 1
-        EXCLUDE_FROM_ALL: 1
-        SYSTEM: 1
-        SOURCE_SUBDIR: 1
-        OPTIONS: +
-    cpmfindpackage:
-      pargs:
-        nargs: '*'
-        flags: []
-      spelling: CPMFindPackage
-      kwargs: *cpmaddpackagekwargs
-    cpmdeclarepackage:
-      pargs:
-        nargs: '*'
-        flags: []
-      spelling: CPMDeclarePackage
-      kwargs: *cpmaddpackagekwargs
-    packageproject:
-      pargs:
-        nargs: '*'
-        flags: []
-      spelling: packageProject
-      kwargs:
-        NAME: 1
-        VERSION: 1
-        INCLUDE_DIR: 1
-        INCLUDE_DESTINATION: 1
-        BINARY_DIR: 1
-        COMPATIBILITY: 1
-        VERSION_HEADER: 1
-        DEPENDENCIES: +
-    cpmusepackagelock:
-      pargs: 1
-      spelling: CPMUsePackageLock
-    cpmregisterpackage:
-      pargs: 1
-      spelling: CPMRegisterPackage
-    cpmgetpackageversion:
-      pargs: 2
-      spelling: CPMGetPackageVersion

.github/workflows/publish.yaml

@@ -15,8 +15,9 @@ jobs:
       - name: Set CPM version by tag
         run: |
           mkdir dist
-          sed "s/1.0.0-development-version/${GITHUB_REF/refs\/tags\/v}/g" cmake/CPM.cmake > dist/CPM.cmake
-          sed "s/1.0.0-development-version/${GITHUB_REF/refs\/tags\/v}/g" cmake/get_cpm.cmake > dist/get_cpm.cmake
+          sed -e "s/1.0.0-development-version/${GITHUB_REF/refs\/tags\//v}/g" cmake/CPM.cmake > dist/CPM.cmake
+          sed -e "s/1.0.0-development-version/${GITHUB_REF/refs\/tags\//v}/g" \
+              -e "s/EMPTY_HASH_SUM/$(sha256sum cmake/CPM.cmake | cut -d' ' -f1)/" cmake/get_cpm.cmake > dist/get_cpm.cmake
 
       - name: Upload CPM.cmake to release
         uses: svenstaro/upload-release-action@v1-release

README.md

@@ -12,7 +12,7 @@ It's built as a thin wrapper around CMake's [FetchContent](https://cmake.org/cma
 
 ## Manage everything
 
-Any downloadable project or resource can be added as a version-controlled dependency though CPM, it is not necessary to modify or package anything.
+Any downloadable project or resource can be added as a version-controlled dependency through CPM, it is not necessary to modify or package anything.
 Projects using modern CMake are automatically configured and their targets can be used immediately.
 For everything else, the targets can be created manually after the dependency has been downloaded (see the [snippets](#snippets) below for examples).
 
@@ -332,7 +332,14 @@ If you know others, feel free to add them here through a PR.
         <p align="center"><b>AALTITOAD - verifier and simulator for Tick Tock Automata</b></p>
       </a>
     </td>
-    <td/>
+    <td>
+      <a href="https://github.com/ZIMO-Elektronik">
+        <p align="center">
+          <img src="https://avatars.githubusercontent.com/u/117935012?s=400&u=9a871a46dd13437f0adcae166e9efbe518ff0b99&v=4" alt="ZIMO-Elektronik" width="100pt" />
+        </p>
+        <p align="center"><b>ZIMO-Elektronik</b></p>
+      </a>
+    </td>
   </tr>
 </table>
 

cmake/.cmake-format-additional_commands-cpm

@@ -0,0 +1,69 @@
+parse:
+  additional_commands:
+    cpmaddpackage:
+      pargs:
+        nargs: '*'
+        flags: []
+      spelling: CPMAddPackage
+      kwargs: &cpmaddpackagekwargs
+        NAME: 1
+        FORCE: 1
+        VERSION: 1
+        GIT_TAG: 1
+        DOWNLOAD_ONLY: 1
+        GITHUB_REPOSITORY: 1
+        GITLAB_REPOSITORY: 1
+        GIT_REPOSITORY: 1
+        SVN_REPOSITORY: 1
+        SVN_REVISION: 1
+        SOURCE_DIR: 1
+        DOWNLOAD_COMMAND: 1
+        FIND_PACKAGE_ARGUMENTS: 1
+        NO_CACHE: 1
+        GIT_SHALLOW: 1
+        URL: 1
+        URL_HASH: 1
+        URL_MD5: 1
+        DOWNLOAD_NAME: 1
+        DOWNLOAD_NO_EXTRACT: 1
+        HTTP_USERNAME: 1
+        HTTP_PASSWORD: 1
+        EXCLUDE_FROM_ALL: 1
+        SYSTEM: 1
+        SOURCE_SUBDIR: 1
+        OPTIONS: +
+    cpmfindpackage:
+      pargs:
+        nargs: '*'
+        flags: []
+      spelling: CPMFindPackage
+      kwargs: *cpmaddpackagekwargs
+    cpmdeclarepackage:
+      pargs:
+        nargs: '*'
+        flags: []
+      spelling: CPMDeclarePackage
+      kwargs: *cpmaddpackagekwargs
+    packageproject:
+      pargs:
+        nargs: '*'
+        flags: []
+      spelling: packageProject
+      kwargs:
+        NAME: 1
+        VERSION: 1
+        INCLUDE_DIR: 1
+        INCLUDE_DESTINATION: 1
+        BINARY_DIR: 1
+        COMPATIBILITY: 1
+        VERSION_HEADER: 1
+        DEPENDENCIES: +
+    cpmusepackagelock:
+      pargs: 1
+      spelling: CPMUsePackageLock
+    cpmregisterpackage:
+      pargs: 1
+      spelling: CPMRegisterPackage
+    cpmgetpackageversion:
+      pargs: 2
+      spelling: CPMGetPackageVersion

cmake/CPM.cmake

@@ -5,7 +5,7 @@
 # MIT License
 # -----------
 #[[
-  Copyright (c) 2019-2022 Lars Melchior and contributors
+  Copyright (c) 2019-2023 Lars Melchior and contributors
 
   Permission is hereby granted, free of charge, to any person obtaining a copy
   of this software and associated documentation files (the "Software"), to deal

cmake/get_cpm.cmake

@@ -1,4 +1,9 @@
+# SPDX-License-Identifier: MIT
+#
+# SPDX-FileCopyrightText: Copyright (c) 2019-2023 Lars Melchior and contributors
+
 set(CPM_DOWNLOAD_VERSION 1.0.0-development-version)
+set(CPM_HASH_SUM "HASH_SUM_PLACEHOLDER")
 
 if(CPM_SOURCE_CACHE)
   set(CPM_DOWNLOAD_LOCATION "${CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
@@ -11,23 +16,20 @@ endif()
 # Expand relative path. This is important if the provided path contains a tilde (~)
 get_filename_component(CPM_DOWNLOAD_LOCATION ${CPM_DOWNLOAD_LOCATION} ABSOLUTE)
 
-function(download_cpm)
-  message(STATUS "Downloading CPM.cmake to ${CPM_DOWNLOAD_LOCATION}")
-  file(DOWNLOAD
-       https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
-       ${CPM_DOWNLOAD_LOCATION}
-  )
-endfunction()
-
-if(NOT (EXISTS ${CPM_DOWNLOAD_LOCATION}))
-  download_cpm()
+message(STATUS "Downloading CPM.cmake to ${CPM_DOWNLOAD_LOCATION}")
+file(
+  DOWNLOAD
+  https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
+  ${CPM_DOWNLOAD_LOCATION}
+  STATUS CPM_DOWNLOAD_STATUS
+  EXPECTED_HASH SHA256=${CPM_HASH_SUM}
+)
+list(GET CPM_DOWNLOAD_STATUS 0 CPM_DOWNLOAD_STATUS_CODE)
+list(GET CPM_DOWNLOAD_STATUS 1 CPM_DOWNLOAD_ERROR_MESSAGE)
+if(${CPM_DOWNLOAD_STATUS_CODE} EQUAL 0)
+  message(STATUS "CPM: Download completed successfully.")
 else()
-  # resume download if it previously failed
-  file(READ ${CPM_DOWNLOAD_LOCATION} check)
-  if("${check}" STREQUAL "")
-    download_cpm()
-  endif()
-  unset(check)
+  message(FATAL_ERROR "CPM: Error occurred during download: ${CPM_DOWNLOAD_ERROR_MESSAGE}")
 endif()
 
 include(${CPM_DOWNLOAD_LOCATION})