rev: tip rubberband-qt-example/repoint -rwxr-xr-x 4.5 KiB View raw Log this file
6737d6595c4b — Chris Cannam Smaller image a month ago
                                                                                
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
#!/bin/bash

# Disable shellcheck warnings for useless-use-of-cat. UUOC is good
# practice, not bad: clearer, safer, less error-prone.
# shellcheck disable=SC2002

sml="$REPOINT_SML"

set -eu

# avoid gussying up output
export HGPLAIN=true

mydir=$(dirname "$0")
program="$mydir/repoint.sml"

hasher=
local_install=
if [ -w "$mydir" ]; then
    if echo | sha256sum >/dev/null 2>&1 ; then
	hasher=sha256sum
        local_install=true
    elif echo | shasum >/dev/null 2>&1 ; then
	hasher=shasum
	local_install=true
    else
        echo "WARNING: sha256sum or shasum program not found" 1>&2
    fi
fi

if [ -n "$local_install" ]; then
    hash=$(echo "$sml" | cat "$program" - | $hasher | cut -c1-16)
    gen_sml=$mydir/.repoint-$hash.sml
    gen_out=$mydir/.repoint-$hash.bin
    trap 'rm -f $gen_sml' 0
else
    gen_sml=$(mktemp /tmp/repoint-XXXXXXXX.sml)
    gen_out=$(mktemp /tmp/repoint-XXXXXXXX.bin)
    trap 'rm -f $gen_sml $gen_out' 0
fi

if [ -x "$gen_out" ]; then
    exec "$gen_out" "$@"
fi

# We need one of Poly/ML, SML/NJ, MLton, or MLKit. Since we're running
# a single-file SML program as if it were a script, our order of
# preference is usually based on startup speed. An exception is the
# local_install case, where we retain a persistent binary

if [ -z "$sml" ]; then
    if [ -n "$local_install" ] && mlton 2>&1 | grep -q 'MLton'; then
	sml="mlton"
    elif sml -h 2>&1 | grep -q 'Standard ML of New Jersey'; then
	sml="smlnj"
    # We would prefer Poly/ML to SML/NJ, except that Poly v5.7 has a
    # nasty bug that occasionally causes it to deadlock on startup.
    # That is fixed in v5.7.1, so we could promote it up the order
    # again at some point in future
    elif echo | poly -v 2>/dev/null | grep -q 'Poly/ML'; then
	sml="polyml"
    elif mlton 2>&1 | grep -q 'MLton'; then
	sml="mlton"
    # MLKit is at the bottom because it leaves compiled files around
    # in an MLB subdir in the current directory
    elif mlkit 2>&1 | grep -q 'MLKit'; then
	sml="mlkit"
    else cat 1>&2 <<EOF

ERROR: No supported SML compiler or interpreter found       
EOF
	cat 1>&2 <<EOF

  The Repoint external source code manager needs a Standard ML (SML)
  compiler or interpreter to run.

  Please ensure you have one of the following SML implementations
  installed and present in your PATH, and try again.

    1. Standard ML of New Jersey
       - may be found in a distribution package called: smlnj
       - executable name: sml

    2. Poly/ML
       - may be found in a distribution package called: polyml
       - executable name: poly

    3. MLton
       - may be found in a distribution package called: mlton
       - executable name: mlton

    4. MLKit
       - may be found in a distribution package called: mlkit
       - executable name: mlkit

EOF
	exit 2
    fi
fi

arglist=""
for arg in "$@"; do
    if [ -n "$arglist" ]; then arglist="$arglist,"; fi
    if echo "$arg" | grep -q '["'"'"']' ; then
	arglist="$arglist\"usage\""
    else
	arglist="$arglist\"$arg\""
    fi
done

case "$sml" in
    polyml)
        if [ -n "$local_install" ] && polyc --help >/dev/null 2>&1 ; then
            if [ ! -x "$gen_out" ]; then
                polyc -o "$gen_out" "$program"
            fi
	    "$gen_out" "$@"
        else
            echo 'use "'"$program"'"; repoint ['"$arglist"'];' |
                poly -q --error-exit
        fi ;;
    mlton)
        if [ ! -x "$gen_out" ]; then
	    echo "[Precompiling Repoint binary...]" 1>&2
	    echo "val _ = main ()" | cat "$program" - > "$gen_sml"
	    mlton -output "$gen_out" "$gen_sml"
        fi
	"$gen_out" "$@" ;;
    mlkit)
        if [ ! -x "$gen_out" ]; then
	    echo "[Precompiling Repoint binary...]" 1>&2
	    echo "val _ = main ()" | cat "$program" - > "$gen_sml"
	    mlkit -output "$gen_out" "$gen_sml"
        fi
	"$gen_out" "$@" ;;
    smlnj)
	cat "$program" | (
	    cat <<EOF
val smlrun__cp = 
    let val x = !Control.Print.out in
        Control.Print.out := { say = fn _ => (), flush = fn () => () };
        x
    end;
val smlrun__prev = ref "";
Control.Print.out := { 
    say = fn s => 
        (if String.isSubstring " Error" s
         then (Control.Print.out := smlrun__cp;
               (#say smlrun__cp) (!smlrun__prev);
               (#say smlrun__cp) s)
         else (smlrun__prev := s; ())),
    flush = fn s => ()
};
EOF
	    cat -
	    cat <<EOF
val _ = repoint [$arglist];
val _ = OS.Process.exit (OS.Process.success);
EOF
            ) > "$gen_sml"
	CM_VERBOSE=false sml "$gen_sml" ;;
    *)
	echo "ERROR: Unknown SML implementation name: $sml" 1>&2;
	exit 2 ;;
esac