whatcanGOwrong

go/pkg/mod/golang.org/x/exp@v0.0.0-20230224173230-c95f2b4c22f2/devtools/checklib.sh

@@ -0,0 +1,73 @@
+# Copyright 2021 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+# Library of useful bash functions and variables for presubmit checks.
+
+RED=; GREEN=; YELLOW=; NORMAL=;
+MAXWIDTH=0
+
+if tput setaf 1 >& /dev/null; then
+  RED=`tput setaf 1`
+  GREEN=`tput setaf 2`
+  YELLOW=`tput setaf 3`
+  NORMAL=`tput sgr0`
+  MAXWIDTH=$(( $(tput cols) - 2 ))
+fi
+
+EXIT_CODE=0
+
+info() { echo -e "${GREEN}$@${NORMAL}" 1>&2; }
+warn() { echo -e "${YELLOW}$@${NORMAL}" 1>&2; }
+err() { echo -e "${RED}$@${NORMAL}" 1>&2; EXIT_CODE=1; }
+
+die() {
+  err $@
+  exit 1
+}
+
+dryrun=false
+
+# runcmd prints an info log describing the command that is about to be run, and
+# then runs it. It sets EXIT_CODE to non-zero if the command fails, but does not exit
+# the script.
+runcmd() {
+  msg="$@"
+  if $dryrun; then
+    echo -e "${YELLOW}dryrun${GREEN}\$ $msg${NORMAL}"
+    return 0
+  fi
+  # Truncate command logging for narrow terminals.
+  # Account for the 2 characters of '$ '.
+  if [[ $MAXWIDTH -gt 0 && ${#msg} -gt $MAXWIDTH ]]; then
+    msg="${msg::$(( MAXWIDTH - 3 ))}..."
+  fi
+
+  echo -e "$@\n" 1>&2;
+  $@ || err "command failed"
+}
+
+# check_header checks that all given files contain the standard header for Go
+# projects.
+check_header() {
+  if [[ "$@" != "" ]]; then
+    for FILE in $@
+    do
+        line="$(head -4 $FILE)"
+        if [[ ! $line == *"The Go Authors. All rights reserved."* ]] &&
+         [[ ! $line == "// DO NOT EDIT. This file was copied from" ]]; then
+              err "missing license header: $FILE"
+        fi
+    done
+  fi
+}
+
+# ensure_go_binary verifies that a binary exists in $PATH corresponding to the
+# given go-gettable URI. If no such binary exists, it is fetched via `go install`.
+ensure_go_binary() {
+  local binary=$(basename $1)
+  if ! [ -x "$(command -v $binary)" ]; then
+    info "Installing: $1"
+    go install $1
+  fi
+}