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index.js
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var path = require('path').posix;
function isAbsolute(p) {
return path.isAbsolute(p) || /^[A-Za-z]:\//.test(p);
}
function isExternal(p) {
return !/^(\.?\.?|[A-Za-z]:)\//.test(p);
}
function absolutify(p, cwd) {
if(cwd) {
return path.join(cwd, p);
} else {
return './' + p;
}
}
function forEachInObjectOrMap(object, map, callback) {
if(object && map) {
throw Error("Both an Object and a Map were supplied!");
}
if(map) {
map.forEach(callback);
} else if(object) {
for(var key in object) {
callback(object[key], key);
}
}
// if neither was supplied, do nothing.
}
module.exports = function rollupPluginHypothetical(options) {
options = options || {};
var files0 = options.files;
var files0AsMap = options.filesMap;
var allowFallthrough = options.allowFallthrough || false;
var allowRelativeExternalFallthrough = options.allowRelativeExternalFallthrough || false;
var allowExternalFallthrough = options.allowExternalFallthrough;
if(allowExternalFallthrough === undefined) {
allowExternalFallthrough = true;
}
var leaveIdsAlone = options.leaveIdsAlone || false;
var impliedExtensions = options.impliedExtensions;
if(impliedExtensions === undefined) {
impliedExtensions = ['.js', '/'];
} else {
impliedExtensions = Array.prototype.slice.call(impliedExtensions);
}
var cwd = options.cwd;
if(cwd !== false) {
if(cwd === undefined) {
cwd = process.cwd();
}
cwd = unixStylePath(cwd);
}
var files = new Map();
if(leaveIdsAlone) {
forEachInObjectOrMap(files0, files0AsMap, function(contents, f) {
files.set(f, contents);
});
} else {
forEachInObjectOrMap(files0, files0AsMap, function(contents, f) {
var unixStyleF = unixStylePath(f);
var pathIsExternal = isExternal(unixStyleF);
var p = path.normalize(unixStyleF);
if(pathIsExternal && !isExternal(p)) {
throw Error(
"Supplied external file path \"" +
unixStyleF +
"\" normalized to \"" +
p +
"\"!"
);
}
if(!isAbsolute(p) && !pathIsExternal) {
p = absolutify(p, cwd);
}
files.set(p, contents);
});
}
function basicResolve(importee) {
if(files.has(importee)) {
return importee;
} else if(!allowFallthrough) {
throw Error(dneMessage(importee));
}
}
var resolveId = leaveIdsAlone ? basicResolve : function(importee, importer) {
importee = unixStylePath(importee);
// the entry file is never external.
var importeeIsExternal = Boolean(importer) && isExternal(importee);
var importeeIsRelativeToExternal =
importer &&
!importeeIsExternal &&
isExternal(importer) &&
!isAbsolute(importee);
if(importeeIsExternal) {
var normalizedImportee = path.normalize(importee);
if(!isExternal(normalizedImportee)) {
throw Error(
"External import \"" +
importee +
"\" normalized to \"" +
normalizedImportee +
"\"!"
);
}
importee = normalizedImportee;
} else if(importeeIsRelativeToExternal) {
var joinedImportee = path.join(path.dirname(importer), importee);
if(!isExternal(joinedImportee)) {
throw Error(
"Import \"" +
importee +
"\" relative to external import \"" +
importer +
"\" results in \"" +
joinedImportee +
"\"!"
);
}
importee = joinedImportee;
} else {
if(!isAbsolute(importee) && importer) {
importee = path.join(path.dirname(importer), importee);
} else {
importee = path.normalize(importee);
}
if(!isAbsolute(importee)) {
importee = absolutify(importee, cwd);
}
}
if(files.has(importee)) {
return importee;
} else if(impliedExtensions) {
for(var i = 0, len = impliedExtensions.length; i < len; ++i) {
var extended = importee + impliedExtensions[i];
if(files.has(extended)) {
return extended;
}
}
}
if(importeeIsExternal && !allowExternalFallthrough) {
throw Error(dneMessage(importee));
}
if(importeeIsRelativeToExternal && !allowRelativeExternalFallthrough) {
throw Error(dneMessage(importee));
}
if(!importeeIsExternal && !importeeIsRelativeToExternal && !allowFallthrough) {
throw Error(dneMessage(importee));
}
if(importeeIsRelativeToExternal) {
// we have to resolve this case specially because Rollup won't
// treat it as external if we don't.
// we have to trust that the user has informed Rollup that this import
// is supposed to be external... ugh.
return importee;
}
};
return {
resolveId: resolveId,
load: function(id) {
if(files.has(id)) {
return files.get(id);
} else {
id = resolveId(id);
return id && files.get(id);
}
}
};
}
function unixStylePath(p) {
return p.split('\\').join('/');
}
function dneMessage(id) {
return "\""+id+"\" does not exist in the hypothetical file system!";
}