Enabling pragma with > in minimum version check

.circleci/config.yml

@@ -651,6 +651,19 @@ jobs:
       SOLTEST_FLAGS: --no-smt
       ASAN_OPTIONS: check_initialization_order=true:detect_stack_use_after_return=true:strict_init_order=true:strict_string_checks=true:detect_invalid_pointer_pairs=2
 
+  t_ubu_pragma_docs_test: &t_ubu_pragma_docs_test
+    docker:
+      - image: ethereum/solidity-buildpack-deps:ubuntu1904-<< pipeline.parameters.ubuntu-1904-docker-image-rev >>
+    environment:
+      TERM: xterm
+    steps:
+      - checkout
+      - attach_workspace:
+          at: build
+      - run: *run_docs_version_pragma_check
+      - store_test_results: *store_test_results
+      - store_artifacts: *artifacts_test_results
+
   t_ems_solcjs:
     docker:
       - image: ethereum/solidity-buildpack-deps:ubuntu1904
@@ -802,6 +815,7 @@ workflows:
       - b_ubu: *workflow_trigger_on_tags
       - b_ubu18: *workflow_trigger_on_tags
       - t_ubu_cli: *workflow_ubuntu1904
+      - t_ubu_pragma_docs_test: *workflow_ubuntu1904
       - t_ubu_soltest: *workflow_ubuntu1904
       - b_ubu_clang: *workflow_trigger_on_tags
       - t_ubu_clang_soltest: *workflow_ubuntu1904_clang

docs/examples/blind-auction.rst

@@ -184,7 +184,7 @@ invalid bids.
 
 ::
 
-    pragma solidity >0.4.23 <0.7.0;
+    pragma solidity >=0.5.0 <0.7.0;
 
     contract BlindAuction {
         struct Bid {

docs/using-the-compiler.rst

@@ -605,8 +605,8 @@ Assume you have the following contracts you want to update declared in ``Source.
 
 .. code-block:: none
 
-    // This will not compile
-    pragma solidity >0.4.23;
+    // This will not compile after 0.5.0
+    pragma solidity >0.4.23 <0.5.0;
 
     contract Updateable {
         function run() public view returns (bool);

scripts/docs_version_pragma_check.sh

@@ -32,6 +32,97 @@ SOLIDITY_BUILD_DIR=${SOLIDITY_BUILD_DIR:-build}
 source "${REPO_ROOT}/scripts/common.sh"
 source "${REPO_ROOT}/scripts/common_cmdline.sh"
 
+function versionGreater()
+{
+    v1=$1
+    v2=$2
+    ver1=( ${v1//./ } )
+    ver2=( ${v2//./ } )
+
+    if (( ${ver1[0]} > ${ver2[0]} ))
+    then
+        return 0
+    elif (( ${ver1[0]} == ${ver2[0]} )) && (( ${ver1[1]} > ${ver2[1]} ))
+    then
+        return 0
+    elif (( ${ver1[0]} == ${ver2[0]} )) && (( ${ver1[1]} == ${ver2[1]} )) && (( ${ver1[2]} > ${ver2[2]} ))
+    then
+        return 0
+    fi
+    return 1
+}
+
+function versionEqual()
+{
+    if [ "$1" == "$2" ]
+    then
+        return 0
+    fi
+    return 1
+}
+
+function getAllAvailableVersions()
+{
+    allVersions=()
+    local allListedVersions=( $(
+        wget -q -O- https://ethereum.github.io/solc-bin/bin/list.txt |
+        grep -Po '(?<=soljson-v)\d+.\d+.\d+(?=\+commit)' |
+        sort -V
+    ) )
+    for listed in "${allListedVersions[@]}"
+    do
+        if versionGreater "$listed" "0.4.10"
+        then
+            allVersions+=( $listed )
+        fi
+    done
+}
+
+function findMinimalVersion()
+{
+    local f=$1
+    local greater=false
+    local pragmaVersion
+
+    # Get minimum compiler version defined by pragma
+    if (grep -Po '(?<=pragma solidity >=)\d+.\d+.\d+' "$f" >/dev/null)
+    then
+        pragmaVersion="$(grep -Po '(?<=pragma solidity >=)\d+.\d+.\d+' "$f")"
+        sign=">="
+    elif (grep -Po '(?<=pragma solidity \^)\d+.\d+.\d+' "$f" >/dev/null)
+    then
+        pragmaVersion="$(grep -Po '(?<=pragma solidity \^)\d+.\d+.\d+' "$f")"
+        sign="^"
+    elif (grep -Po '(?<=pragma solidity >)\d+.\d+.\d+' "$f" >/dev/null)
+    then
+        pragmaVersion="$(grep -Po '(?<=pragma solidity >)\d+.\d+.\d+' "$f")"
+        sign=">"
+        greater=true;
+    else
+        printError "No valid pragma statement in file. Skipping..."
+        return
+    fi
+
+    version=""
+    for ver in "${allVersions[@]}"
+    do
+        if versionGreater "$ver" "$pragmaVersion"
+        then
+            minVersion="$ver"
+            break
+        elif ([ $greater == false ]) && versionEqual "$ver" "$pragmaVersion"
+        then
+            version="$ver"
+            break
+        fi
+    done
+
+    if [ -z version ]
+    then
+        printError "No release $sign$pragmaVersion was listed in available releases!"
+    fi
+}
+
 printTask "Verifying that all examples from the documentation have the correct version range..."
 SOLTMPDIR=$(mktemp -d)
 (
@@ -39,6 +130,8 @@ SOLTMPDIR=$(mktemp -d)
     cd "$SOLTMPDIR"
     "$REPO_ROOT"/scripts/isolate_tests.py "$REPO_ROOT"/docs/ docs
 
+    getAllAvailableVersions
+
     for f in *.sol
     do
         # The contributors guide uses syntax tests, but we cannot
@@ -61,27 +154,26 @@ SOLTMPDIR=$(mktemp -d)
         # ignore warnings in this case
         opts="$opts -o"
 
-        # Get minimum compiler version defined by pragma
-        if (grep -Po '(?<=pragma solidity >=)\d+.\d+.\d+' "$f" >/dev/null); then
-            version="$(grep -Po '(?<=pragma solidity >=)\d+.\d+.\d+' "$f")"
-            if (echo $version | grep -Po '(?<=0.4.)\d+' >/dev/null); then
-                patch=$(echo $version | grep -Po '(?<=0.4.)\d+')
-                if (( patch < 11 )); then
-                    version="0.4.11" # first available release on github
-                fi
-            fi
-        elif (grep -Po '(?<=pragma solidity \^)\d+.\d+.\d+' "$f" >/dev/null); then
-            version="$(grep -Po '(?<=pragma solidity \^)\d+.\d+.\d+' "$f")"
+        findMinimalVersion $f
+        if [ -z "$version" ]
+        then
+            continue
         fi
 
         opts="$opts -v $version"
 
         solc_bin="solc-$version"
         echo "$solc_bin"
-        if [[ ! -f "$solc_bin" ]]; then
+        if [[ ! -f "$solc_bin" ]]
+        then
             echo "Downloading release from github..."
-            wget https://github.com/ethereum/solidity/releases/download/v$version/solc-static-linux
-            mv solc-static-linux $solc_bin
+            if wget -q https://github.com/ethereum/solidity/releases/download/v$version/solc-static-linux >/dev/null
+            then
+                mv solc-static-linux $solc_bin
+            else
+                printError "No release $version was found on github!"
+                continue
+            fi
         fi
 
         ln -sf "$solc_bin" "solc"