1 files changed, 90 insertions, 0 deletions
diff --git a/tools/install.sh b/tools/install.sh
new file mode 100755
index 0000000..f79cb3b
--- /dev/null
+++ b/tools/install.sh
@@ -0,0 +1,90 @@
+#!/bin/sh -e
+# Portable install version that supports -D -m and -t
+usage() {
+    printf '%s\n' "usage: $0 [-D] [-m mode] source dest" \
+                  "   or: $0 [-D] [-m mode] [-t dir] [source...]" >&2
+    exit 1
+}
+
+die() { printf '%s\n' "$@" >&2; exit 1;}
+
+mkdirp=''
+target=''
+mode=''
+REST=''
+parse() {
+    OPTIND=$(($#+1))
+    while OPTARG= && [ $# -gt 0 ]; do
+        case $1 in
+            -[tm]?*) OPTARG=$1; shift
+                     eval 'set -- "${OPTARG%"${OPTARG#??}"}" "${OPTARG#??}"' ${1+'"$@"'}
+                     ;;
+            -[!-]?*) OPTARG=$1; shift
+                     eval 'set -- "${OPTARG%"${OPTARG#??}"}" -"${OPTARG#??}"' ${1+'"$@"'}
+                     OPTARG= ;;
+        esac
+        case $1 in
+            '-D')
+                [ "${OPTARG:-}" ] && OPTARG=${OPTARG#*\=} && set "noarg" "$1" && break
+                eval '[ ${OPTARG+x} ] &&:' && OPTARG='1' || OPTARG=''
+                mkdirp="$OPTARG"
+                ;;
+            '-t')
+                [ $# -le 1 ] && set "required" "$1" && break
+                OPTARG=$2
+                target="$OPTARG"
+                shift ;;
+            '-m')
+                [ $# -le 1 ] && set "required" "$1" && break
+                OPTARG=$2
+                mode="$OPTARG"
+                shift ;;
+            '-h'|'--help')
+                usage
+                exit 0 ;;
+            --)
+                shift
+                while [ $# -gt 0 ]; do
+                    REST="${REST} \"\${$((OPTIND-$#))}\""
+                    shift
+                done
+                break ;;
+            [-]?*) set "unknown" "$1"; break ;;
+            *)
+                REST="${REST} \"\${$((OPTIND-$#))}\""
+        esac
+        shift
+    done
+    [ $# -eq 0 ] && { OPTIND=1; unset OPTARG; return 0; }
+    case $1 in
+        unknown) set "Unrecognized option: $2" "$@" ;;
+        noarg) set "Does not allow an argument: $2" "$@" ;;
+        required) set "Requires an argument: $2" "$@" ;;
+        pattern:*) set "Does not match the pattern (${1#*:}): $2" "$@" ;;
+        notcmd) set "Not a command: $2" "$@" ;;
+        *) set "Validation error ($1): $2" "$@"
+    esac
+    echo "$1" >&2
+    exit 1
+}
+
+parse "$@" && eval set -- "$REST"
+
+if [ "$target" ]; then
+    [ "$mkdirp" ] || [ -d "$target" ] || die "$target doesn't exist"
+    mkdir -p "$target"
+    for arg; do
+        [ -d "$target/${arg##*/}" ] && die "$target/${arg##*/} is a directory"
+        cp "$arg" "$target/${arg##*/}"
+
+        # Most implementations set the mode to 0755 by default when -t is set.
+        chmod "${mode:=0755}" "$target/${arg##*/}"
+    done
+else
+    case "$2" in */*) [ "$mkdirp" ] || [ -d "${2%/*}" ] || die "${2%/*} doesn't exist"
+                      mkdir -p "${2%/*}"
+    esac
+    [ -d "$2" ] && die "$2 is a directory"
+    cp "$1" "$2"
+    chmod "${mode:=0755}" "$2"
+fi