DIRECTORY
BasicTime USING [GMT, nullGMT, Period],
Commander USING [CommandProc, Register],
CommandTool USING [ArgumentVector, Failed, Parse],
DFUtilities USING [DateToStream],
FileNames USING [ResolveRelativePath],
FS USING [EnumerateForNames, ExpandName, Error, FileInfo, NameProc],
IO USING [PutChar, PutF, PutRope, STREAM],
PriorityQueue USING [Create, Insert, Ref, Remove, Size, SortPred],
Process USING [CheckForAbort],
Rope USING [Compare, Equal, Fetch, Flatten, Length, ROPE, Run, SkipTo, Substr],
UserProfile USING [Token];

ListCommandImpl: CEDAR PROGRAM
IMPORTS BasicTime, Commander, CommandTool, DFUtilities, FileNames, FS, IO, PriorityQueue, Process, Rope, UserProfile
= BEGIN

GMT: TYPE = BasicTime.GMT;
LORA: TYPE = LIST OF REF ANY;
ROPE: TYPE = Rope.ROPE;
STREAM: TYPE = IO.STREAM;

ListCommandProc: Commander.CommandProc = {
EachFile: FS.NameProc = {
attachedTo: ROPE _ NIL;
created: GMT _ BasicTime.nullGMT;
bytes: INT _ 0;
keep: CARDINAL _ 0;
item: FileItem _ NIL;
needInfo: BOOL _ unattachedOnly;
continue _ TRUE;
Process.CheckForAbort[];
IF exactLevelMatch AND anglesRequired # CountAngles[fullFName] THEN RETURN;
SELECT TRUE FROM
directoriesOnly => {};
briefPrint AND NOT complexSorting AND NOT attachedPrint => {};
ENDCASE => needInfo _ TRUE;
IF needInfo THEN {
pos: INT _ Rope.SkipTo[fullFName, 1, "]"]+1;
len: INT _ Rope.Length[fullFName];
[fullFName, attachedTo, keep, bytes, created]
_ FS.FileInfo[name: fullFName, remoteCheck: remoteCheck];
};
IF unattachedOnly AND attachedTo # NIL THEN RETURN;
IF bytes < 0 AND needInfo AND NOT remoteCheck THEN
[fullFName, attachedTo, keep, bytes, created]
_ FS.FileInfo[name: fullFName, remoteCheck: TRUE];
item _ NEW[FileItemRep _ [fullFName, attachedTo, created, bytes, keep]];
filesSeen _ filesSeen + 1;
IF bytes > 0 THEN bytesTotal _ bytesTotal + bytes;
SELECT TRUE FROM
directoriesOnly => {
oldLag: ROPE _ lagPrefix;
SetLagPrefix[fullFName];
IF oldLag # lagPrefix THEN {
item.fullFName _ lagPrefix;
PriorityQueue.Insert[pq, item];
};
};
complexSorting => PriorityQueue.Insert[pq, item];
ENDCASE => PrintOneFile[item];
};
PrintOneFile: PROC [item: FileItem] = {
oldLag: ROPE _ lagPrefix;
printName: ROPE _ item.fullFName;
Process.CheckForAbort[];
IF NOT fullPrint AND NOT directoriesOnly THEN {
SetLagPrefix[printName];
IF oldLag # lagPrefix THEN {
IO.PutRope[out, lagPrefix];
IO.PutChar[out, IF oneLine THEN '  ELSE '\n];
};
printName _ Rope.Substr[printName, lagPrefixLen];
IF NOT oneLine THEN IO.PutRope[out, "  "];
};
SELECT TRUE FROM
directoriesOnly => IO.PutRope[out, printName];
briefPrint => {
IO.PutRope[out, printName];
IF attachedPrint AND item.attachedTo # NIL THEN {
IF NOT oneLine THEN IO.PutRope[out, "\n "];
IO.PutF[out, " => %g", [rope[item.attachedTo]] ];
};
};
ENDCASE => {
form: ROPE = IF narrowPrint THEN "%g\n%12g  " ELSE "%-24g %6g ";
IO.PutF[out, form, [rope[printName]], [integer[item.bytes]] ];
IF item.created = BasicTime.nullGMT
THEN IO.PutRope[out, "??"]
ELSE DFUtilities.DateToStream[out, [explicit, item.created] ];
IF attachedPrint AND item.attachedTo # NIL THEN {
IF NOT oneLine THEN IO.PutRope[out, "\n "];
IO.PutF[out, " => %g", [rope[item.attachedTo]] ];
};
IF printKeep THEN IO.PutF[out, ", keep: %g", [cardinal[item.keep]] ];
};
IO.PutChar[out, IF oneLine THEN '  ELSE '\n];
};
TryPattern: PROC [pattern: ROPE] = {
ENABLE FS.Error => IF error.group # $bug THEN {
IO.PutRope[out, "  -- "];
IO.PutRope[out, error.explanation];
GO TO err};
patternsTried _ patternsTried + 1;
pattern _ FileNames.ResolveRelativePath[pattern];
pattern _ FS.ExpandName[pattern].fullFName;
IF exactLevelMatch THEN
anglesRequired _ CountAngles[pattern];
complexSorting _ sortData # NIL;
SELECT TRUE FROM
directoriesOnly => pq _ PriorityQueue.Create[SortPred, NIL];
complexSorting => pq _ PriorityQueue.Create[SortPred, sortData];
ENDCASE => pq _ NIL;
SetLagPrefix[NIL];
FS.EnumerateForNames[pattern, EachFile];
SetLagPrefix[NIL];
IF pq # NIL THEN {
lagName: ROPE _ NIL;
THROUGH [0..PriorityQueue.Size[pq]) DO
item: FileItem = NARROW[PriorityQueue.Remove[pq]];
IF directoriesOnly THEN {
IF Rope.Equal[item.fullFName, lagName] THEN LOOP;
lagName _ item.fullFName;
};
PrintOneFile[item];
ENDLOOP;
};
EXITS
err => {IO.PutRope[out, "\n"]; RETURN};
};
SetLagPrefix: PROC [fileName: ROPE] = {
IF lagPrefix # NIL THEN {
IF Rope.Run[lagPrefix, 0, fileName, 0, FALSE] = lagPrefixLen THEN {
pos: INT = Rope.SkipTo[fileName, lagPrefixLen, ">/]"];
IF pos = Rope.Length[fileName] THEN RETURN;
};
};
FOR i: INT DECREASING IN [0..Rope.Length[fileName]) DO
SELECT Rope.Fetch[fileName, i] FROM
'>, '/, '] => {lagPrefix _ Rope.Flatten[fileName, 0, lagPrefixLen _ i+1]; RETURN};
ENDCASE;
ENDLOOP;
lagPrefix _ NIL;
lagPrefixLen _ 0;
};
AddSortOption: PROC [option: ATOM] = {
new: LORA _ LIST[option];
IF sortDataTail = NIL THEN sortData _ new ELSE sortDataTail.rest _ new;
sortDataTail _ new;
};
RemSortOption: PROC [option: ATOM] = {
lag: LORA _ sortData;
IF lag = NIL THEN RETURN;
IF lag.first = option THEN {
sortData _ sortData.rest;
RETURN};
FOR each: LORA _ lag.rest, each.rest WHILE each # NIL DO
IF each.first = option THEN {lag.rest _ each.rest; EXIT};
lag _ each;
ENDLOOP;
};
out: STREAM = cmd.out;
lagPrefix: ROPE _ NIL;
lagPrefixLen: INT _ 0;
patternsTried: INT _ 0;
filesSeen: INT _ 0;
bytesTotal: INT _ 0;
directoriesOnly: BOOL _ FALSE;
complexSorting: BOOL _ FALSE;
printKeep: BOOL _ FALSE;
narrowPrint: BOOL _ FALSE;
attachedPrint: BOOL _ FALSE;
briefPrint: BOOL _ FALSE;
remoteCheck: BOOL _ FALSE;
fullPrint: BOOL _ FALSE;
oneLine: BOOL _ FALSE;
unattachedOnly: BOOL _ FALSE;
exactLevelMatch: BOOL _ FALSE;
anglesRequired: INT _ 0;
sortData: LORA _ NIL;
sortDataTail: LORA _ NIL;
pq: PriorityQueue.Ref _ NIL;
argv: CommandTool.ArgumentVector _ CommandTool.Parse[cmd: cmd
! CommandTool.Failed => {msg _ errorMsg; GO TO failed}];
ProcessSwitches: PROC [arg: ROPE] = {
sense: BOOL _ TRUE;
direction: {up, down} _ down;
FOR index: INT IN [0..Rope.Length[arg]) DO
SELECT Rope.Fetch[arg, index] FROM
'~ => {sense _ NOT sense; LOOP};
'> => direction _ down;
'< => direction _ up;
'a, 'A => attachedPrint _ sense;
'b, 'B => briefPrint _ sense;
'd, 'D => {
RemSortOption[$MoreRecent];
RemSortOption[$LessRecent];
IF sense THEN
AddSortOption[IF direction = up THEN $LessRecent ELSE $MoreRecent];
};
'f, 'F => fullPrint _ sense;
'k, 'K => printKeep _ sense;
'n, 'N => narrowPrint _ sense;
'o, 'O => oneLine _ sense;
'p, 'P => directoriesOnly _ sense;
'r, 'R => remoteCheck _ sense;
's, 'S => {
RemSortOption[$Larger];
RemSortOption[$Smaller];
IF sense THEN
AddSortOption[IF direction = up THEN $Smaller ELSE $Larger];
};
'u, 'U => unattachedOnly _ sense;
'x, 'X => exactLevelMatch _ sense;
ENDCASE;
sense _ TRUE;
ENDLOOP;
};

ProcessSwitches[UserProfile.Token["ListCommand.DefaultSwitches"]];

FOR i: NAT IN [1..argv.argc) DO
arg: ROPE = argv[i];
IF Rope.Length[arg] = 0 THEN LOOP;
IF Rope.Fetch[arg, 0] = '- THEN {
ProcessSwitches[arg];
LOOP;
};
TryPattern[arg];
ENDLOOP;
IF patternsTried = 0 THEN TryPattern["*"];
IF oneLine THEN IO.PutChar[out, '\n];
IF filesSeen > 0 THEN {
IO.PutF[out, "-- %g files", [integer[filesSeen]] ];
IF bytesTotal > 0 THEN IO.PutF[out, ", %g total bytes", [integer[bytesTotal]] ];
IO.PutChar[out, '\n];
};
EXITS
failed => {result _ $Failure};
};

CountAngles: PROC [pattern: ROPE] RETURNS [count: INT _ 0] = {
len: INT = Rope.Length[pattern];
pos: INT _ Rope.SkipTo[pattern, 0, ">"];
WHILE pos < len DO
pos _ Rope.SkipTo[pattern, pos+1, ">"];
count _ count + 1;
ENDLOOP;
};

FileItem: TYPE = REF FileItemRep;
FileItemRep: TYPE = RECORD [
fullFName, attachedTo: ROPE, created: GMT, bytes: INT, keep: CARDINAL];

SortPred: PriorityQueue.SortPred = {
xx: FileItem = NARROW[x];
yy: FileItem = NARROW[y];
options: LORA = NARROW[data];
FOR each: LORA _ options, each.rest WHILE each # NIL DO
SELECT each.first FROM
$MoreRecent => {
IF xx.created = yy.created THEN LOOP;
RETURN [BasicTime.Period[xx.created, yy.created] < 0];
};
$LessRecent => {
IF xx.created = yy.created THEN LOOP;
RETURN [BasicTime.Period[xx.created, yy.created] > 0];
};
$Larger => {
IF xx.bytes = yy.bytes THEN LOOP;
RETURN [xx.bytes > yy.bytes];
};
$Smaller => {
IF xx.bytes = yy.bytes THEN LOOP;
RETURN [xx.bytes < yy.bytes];
};
ENDCASE;
ENDLOOP;
RETURN [Rope.Compare[xx.fullFName, yy.fullFName, FALSE] = less];
};

doc: ROPE = "(List | LS) {switch | pattern}*\nswitch = -a: attached print, -b: brief format, -d: date sort, -f: full name print, -k: keep print, -n: narrow print, -o: one line, -p: prefixes only, -r: remote check, -s: size sort, -u: un backed up, -x: exact level match";

Commander.Register[key: "///Commands/LS", proc: ListCommandProc, doc: doc];

Commander.Register[key: "///Commands/List", proc: ListCommandProc, doc: doc];

END.




ϊListCommandImpl.mesa
Copyright c 1984, 1985 by Xerox Corporation.  All rights reserved.
Russ Atkinson, March 5, 1985 6:02:56 pm PST
[cmd: Handle] RETURNS [result: REF _ NIL, msg: ROPE _ NIL]
CommandObject = [in, out, err: STREAM, commandLine, command: ROPE, ...]
[fullFName: ROPE] RETURNS [continue: BOOL]
We do not know the # of bytes in the file, so we have to check on the true length, which is on the server.  This seems to happen more often than I would like.  I wonder why?
item: REF [fullFName, attachedTo: ROPE, created: GMT, bytes: INT, keep: CARDINAL]
Factor out the directories
... sets the lagging prefix from the given file name, which is presumed to be syntactically correct, although it need not be complete.  A file name without a prefix will set the lagPrefix to NIL.  We also enforce lagPrefixLen = Rope.Length[lagPrefix] at exit, assuming that no other routine sets lagPrefix.
do we have a new prefix?
So far we have a match with the lagging prefix.  How far does it go?
We have a new lagging prefix, so scan backwards for the LAST directory
The file name has no prefix, so clear out the lagPrefix
This argument sets switches for the remaining patterns
Now the argument is assumed to be a file pattern.
[x: Item, y: Item, data: REF] RETURNS [BOOL]

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