Add license check step to Travis

Signed-off-by: Tomasz Michalak <tmichalak@antmicro.com>
Signed-off-by: Tim 'mithro' Ansell <tansell@google.com>

.github/check_license.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+
+echo
+echo "==========================="
+echo "Check SPDX identifier"
+echo "==========================="
+echo
+
+ERROR_FILES=""
+FILES_TO_CHECK=`find . \
+    -size +0 -type f \( -name '*.sh' -o -name '*.py' -o -name 'Makefile' -o -name '*.tcl' \) \
+    \( -not -path "*/.*/*" -not -path "*/third_party/*" -not -path "*/database/*" -not -path "*/env/*" \)`
+
+for file in $FILES_TO_CHECK; do
+    echo "Checking $file"
+    grep -q "SPDX-License-Identifier" $file || ERROR_FILES="$ERROR_FILES $file"
+done
+
+if [ ! -z "$ERROR_FILES" ]; then
+    for file in $ERROR_FILES; do
+        echo "ERROR: $file does not have license information."
+    done
+    return 1
+fi
+
+echo
+echo "==========================="
+echo "Check third party LICENSE"
+echo "==========================="
+echo
+
+function check_if_submodule {
+    for submodule in `git submodule --quiet foreach 'echo $sm_path'`; do
+        if [ "$1" == "$submodule" ]; then
+            return 1
+        fi
+    done
+}
+
+THIRD_PARTY_DIRS=""
+if [[ -e third_party ]]; then
+    THIRD_PARTY_DIRS=`ls third_party --ignore=reformat.tcl --ignore cctz --ignore gflags --ignore yosys `
+fi
+ERROR_NO_LICENSE=""
+
+for dir in $THIRD_PARTY_DIRS; do
+    # Checks if we are not in a submodule
+    if check_if_submodule $dir; then
+        echo "Checking third_party/$dir"
+        [ -f third_party/$dir/LICENSE ] || ERROR_NO_LICENSE="$ERROR_NO_LICENSE $dir"
+    fi
+done
+
+if [ ! -z "$ERROR_NO_LICENSE" ]; then
+    for dir in $ERROR_NO_LICENSE; do
+        echo "ERROR: $dir does not have the LICENSE file."
+    done
+    return 1
+fi

.github/check_python_scripts.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+
+echo
+echo "==================================="
+echo "Check python utf coding and shebang"
+echo "==================================="
+echo
+
+ERROR_FILES_SHEBANG=""
+ERROR_FILES_UTF_CODING=""
+FILES_TO_CHECK=`find . \
+    -size +0 -type f \( -name '*.py' \) \
+    \( -not -path "*/.*/*" -not -path "*/third_party/*" -not -path "*/env/*" \)`
+
+for file in $FILES_TO_CHECK; do
+    echo "Checking $file"
+    if [[ -x $file ]]; then
+        grep -q "\#\!/usr/bin/env python3" $file || ERROR_FILES_SHEBANG="$ERROR_FILES_SHEBANG $file"
+    fi
+    grep -q "\#.*coding: utf-8" $file || ERROR_FILES_UTF_CODING="$ERROR_FILES_UTF_CODING $file"
+done
+
+if [ ! -z "$ERROR_FILES_SHEBANG" ]; then
+    for file in $ERROR_FILES_SHEBANG; do
+        echo "ERROR: $file does not have the python3 shebang."
+    done
+    return 1
+fi
+
+if [ ! -z "$ERROR_FILES_UTF_CODING" ]; then
+    for file in $ERROR_FILES_UTF_CODING; do
+        echo "ERROR: $file does not have the utf encoding set."
+    done
+    return 1
+fi
+
+echo

.travis.yml

@@ -32,3 +32,8 @@ jobs:
       script:
         - make format
         - test $(git status --porcelain | wc -l) -eq 0 || { git diff; false; }
+
+    - name: "License Checks"
+      script:
+        - source .github/check_license.sh
+        - source .github/check_python_scripts.sh