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node_modules/semver/CHANGELOG.md

@@ -1,5 +1,31 @@
 # changes log
 
+## 7.3.0
+
+* Add `subset(r1, r2)` method to determine if `r1` range is entirely
+  contained by `r2` range.
+
+## 7.2.3
+
+* Fix handling of `includePrelease` mode where version ranges like `1.0.0 -
+  2.0.0` would include `3.0.0-pre` and not `1.0.0-pre`.
+
+## 7.2.2
+
+* Fix bug where `2.0.0-pre` would be included in `^1.0.0` if
+  `includePrerelease` was set to true.
+
+## 7.2.0
+
+* Add `simplifyRange` method to attempt to generate a more human-readable
+  range expression that is equivalent to a supplied range, for a given set
+  of versions.
+
+## 7.1.2
+
+* Remove fancy lazy-loading logic, as it was causing problems for webpack
+  users.
+
 ## 7.1.0
 
 * Add `require('semver/preload')` to load the entire module without using

node_modules/semver/README.md

@@ -78,6 +78,8 @@ const semverOutside = require('semver/ranges/outside')
 const semverGtr = require('semver/ranges/gtr')
 const semverLtr = require('semver/ranges/ltr')
 const semverIntersects = require('semver/ranges/intersects')
+const simplifyRange = require('semver/ranges/simplify')
+const rangeSubset = require('semver/ranges/subset')
 ```
 
 As a command-line utility:
@@ -254,8 +256,8 @@ inclusive range, then all versions that start with the supplied parts
 of the tuple are accepted, but nothing that would be greater than the
 provided tuple parts.
 
-* `1.2.3 - 2.3` := `>=1.2.3 <2.4.0`
-* `1.2.3 - 2` := `>=1.2.3 <3.0.0`
+* `1.2.3 - 2.3` := `>=1.2.3 <2.4.0-0`
+* `1.2.3 - 2` := `>=1.2.3 <3.0.0-0`
 
 #### X-Ranges `1.2.x` `1.X` `1.2.*` `*`
 
@@ -263,28 +265,28 @@ Any of `X`, `x`, or `*` may be used to "stand in" for one of the
 numeric values in the `[major, minor, patch]` tuple.
 
 * `*` := `>=0.0.0` (Any version satisfies)
-* `1.x` := `>=1.0.0 <2.0.0` (Matching major version)
-* `1.2.x` := `>=1.2.0 <1.3.0` (Matching major and minor versions)
+* `1.x` := `>=1.0.0 <2.0.0-0` (Matching major version)
+* `1.2.x` := `>=1.2.0 <1.3.0-0` (Matching major and minor versions)
 
 A partial version range is treated as an X-Range, so the special
 character is in fact optional.
 
 * `""` (empty string) := `*` := `>=0.0.0`
-* `1` := `1.x.x` := `>=1.0.0 <2.0.0`
-* `1.2` := `1.2.x` := `>=1.2.0 <1.3.0`
+* `1` := `1.x.x` := `>=1.0.0 <2.0.0-0`
+* `1.2` := `1.2.x` := `>=1.2.0 <1.3.0-0`
 
 #### Tilde Ranges `~1.2.3` `~1.2` `~1`
 
 Allows patch-level changes if a minor version is specified on the
 comparator.  Allows minor-level changes if not.
 
-* `~1.2.3` := `>=1.2.3 <1.(2+1).0` := `>=1.2.3 <1.3.0`
-* `~1.2` := `>=1.2.0 <1.(2+1).0` := `>=1.2.0 <1.3.0` (Same as `1.2.x`)
-* `~1` := `>=1.0.0 <(1+1).0.0` := `>=1.0.0 <2.0.0` (Same as `1.x`)
-* `~0.2.3` := `>=0.2.3 <0.(2+1).0` := `>=0.2.3 <0.3.0`
-* `~0.2` := `>=0.2.0 <0.(2+1).0` := `>=0.2.0 <0.3.0` (Same as `0.2.x`)
-* `~0` := `>=0.0.0 <(0+1).0.0` := `>=0.0.0 <1.0.0` (Same as `0.x`)
-* `~1.2.3-beta.2` := `>=1.2.3-beta.2 <1.3.0` Note that prereleases in
+* `~1.2.3` := `>=1.2.3 <1.(2+1).0` := `>=1.2.3 <1.3.0-0`
+* `~1.2` := `>=1.2.0 <1.(2+1).0` := `>=1.2.0 <1.3.0-0` (Same as `1.2.x`)
+* `~1` := `>=1.0.0 <(1+1).0.0` := `>=1.0.0 <2.0.0-0` (Same as `1.x`)
+* `~0.2.3` := `>=0.2.3 <0.(2+1).0` := `>=0.2.3 <0.3.0-0`
+* `~0.2` := `>=0.2.0 <0.(2+1).0` := `>=0.2.0 <0.3.0-0` (Same as `0.2.x`)
+* `~0` := `>=0.0.0 <(0+1).0.0` := `>=0.0.0 <1.0.0-0` (Same as `0.x`)
+* `~1.2.3-beta.2` := `>=1.2.3-beta.2 <1.3.0-0` Note that prereleases in
   the `1.2.3` version will be allowed, if they are greater than or
   equal to `beta.2`.  So, `1.2.3-beta.4` would be allowed, but
   `1.2.4-beta.2` would not, because it is a prerelease of a
@@ -306,15 +308,15 @@ However, it presumes that there will *not* be breaking changes between
 `0.2.4` and `0.2.5`.  It allows for changes that are presumed to be
 additive (but non-breaking), according to commonly observed practices.
 
-* `^1.2.3` := `>=1.2.3 <2.0.0`
-* `^0.2.3` := `>=0.2.3 <0.3.0`
-* `^0.0.3` := `>=0.0.3 <0.0.4`
-* `^1.2.3-beta.2` := `>=1.2.3-beta.2 <2.0.0` Note that prereleases in
+* `^1.2.3` := `>=1.2.3 <2.0.0-0`
+* `^0.2.3` := `>=0.2.3 <0.3.0-0`
+* `^0.0.3` := `>=0.0.3 <0.0.4-0`
+* `^1.2.3-beta.2` := `>=1.2.3-beta.2 <2.0.0-0` Note that prereleases in
   the `1.2.3` version will be allowed, if they are greater than or
   equal to `beta.2`.  So, `1.2.3-beta.4` would be allowed, but
   `1.2.4-beta.2` would not, because it is a prerelease of a
   different `[major, minor, patch]` tuple.
-* `^0.0.3-beta` := `>=0.0.3-beta <0.0.4`  Note that prereleases in the
+* `^0.0.3-beta` := `>=0.0.3-beta <0.0.4-0`  Note that prereleases in the
   `0.0.3` version *only* will be allowed, if they are greater than or
   equal to `beta`.  So, `0.0.3-pr.2` would be allowed.
 
@@ -322,16 +324,16 @@ When parsing caret ranges, a missing `patch` value desugars to the
 number `0`, but will allow flexibility within that value, even if the
 major and minor versions are both `0`.
 
-* `^1.2.x` := `>=1.2.0 <2.0.0`
-* `^0.0.x` := `>=0.0.0 <0.1.0`
-* `^0.0` := `>=0.0.0 <0.1.0`
+* `^1.2.x` := `>=1.2.0 <2.0.0-0`
+* `^0.0.x` := `>=0.0.0 <0.1.0-0`
+* `^0.0` := `>=0.0.0 <0.1.0-0`
 
 A missing `minor` and `patch` values will desugar to zero, but also
 allow flexibility within those values, even if the major version is
 zero.
 
-* `^1.x` := `>=1.0.0 <2.0.0`
-* `^0.x` := `>=0.0.0 <1.0.0`
+* `^1.x` := `>=1.0.0 <2.0.0-0`
+* `^0.x` := `>=0.0.0 <1.0.0-0`
 
 ### Range Grammar
 
@@ -446,6 +448,16 @@ strings that they parse.
   `hilo` argument must be either the string `'>'` or `'<'`.  (This is
   the function called by `gtr` and `ltr`.)
 * `intersects(range)`: Return true if any of the ranges comparators intersect
+* `simplifyRange(versions, range)`: Return a "simplified" range that
+  matches the same items in `versions` list as the range specified.  Note
+  that it does *not* guarantee that it would match the same versions in all
+  cases, only for the set of versions provided.  This is useful when
+  generating ranges by joining together multiple versions with `||`
+  programmatically, to provide the user with something a bit more
+  ergonomic.  If the provided range is shorter in string-length than the
+  generated range, then that is returned.
+* `subset(subRange, superRange)`: Return `true` if the `subRange` range is
+  entirely contained by the `superRange` range.
 
 Note that, since ranges may be non-contiguous, a version might not be
 greater than a range, less than a range, *or* satisfy a range!  For

node_modules/semver/classes/range.js

@@ -68,7 +68,7 @@ class Range {
     range = range.trim()
     // `1.2.3 - 1.2.4` => `>=1.2.3 <=1.2.4`
     const hr = loose ? re[t.HYPHENRANGELOOSE] : re[t.HYPHENRANGE]
-    range = range.replace(hr, hyphenReplace)
+    range = range.replace(hr, hyphenReplace(this.options.includePrerelease))
     debug('hyphen replace', range)
     // `> 1.2.3 < 1.2.5` => `>1.2.3 <1.2.5`
     range = range.replace(re[t.COMPARATORTRIM], comparatorTrimReplace)
@@ -92,6 +92,7 @@ class Range {
       .map(comp => parseComparator(comp, this.options))
       .join(' ')
       .split(/\s+/)
+      .map(comp => replaceGTE0(comp, this.options))
       // in loose mode, throw out any that are not valid comparators
       .filter(this.options.loose ? comp => !!comp.match(compRe) : () => true)
       .map(comp => new Comparator(comp, this.options))
@@ -191,11 +192,11 @@ const parseComparator = (comp, options) => {
 const isX = id => !id || id.toLowerCase() === 'x' || id === '*'
 
 // ~, ~> --> * (any, kinda silly)
-// ~2, ~2.x, ~2.x.x, ~>2, ~>2.x ~>2.x.x --> >=2.0.0 <3.0.0
-// ~2.0, ~2.0.x, ~>2.0, ~>2.0.x --> >=2.0.0 <2.1.0
-// ~1.2, ~1.2.x, ~>1.2, ~>1.2.x --> >=1.2.0 <1.3.0
-// ~1.2.3, ~>1.2.3 --> >=1.2.3 <1.3.0
-// ~1.2.0, ~>1.2.0 --> >=1.2.0 <1.3.0
+// ~2, ~2.x, ~2.x.x, ~>2, ~>2.x ~>2.x.x --> >=2.0.0 <3.0.0-0
+// ~2.0, ~2.0.x, ~>2.0, ~>2.0.x --> >=2.0.0 <2.1.0-0
+// ~1.2, ~1.2.x, ~>1.2, ~>1.2.x --> >=1.2.0 <1.3.0-0
+// ~1.2.3, ~>1.2.3 --> >=1.2.3 <1.3.0-0
+// ~1.2.0, ~>1.2.0 --> >=1.2.0 <1.3.0-0
 const replaceTildes = (comp, options) =>
   comp.trim().split(/\s+/).map((comp) => {
     return replaceTilde(comp, options)
@@ -210,18 +211,18 @@ const replaceTilde = (comp, options) => {
     if (isX(M)) {
       ret = ''
     } else if (isX(m)) {
-      ret = `>=${M}.0.0 <${+M + 1}.0.0`
+      ret = `>=${M}.0.0 <${+M + 1}.0.0-0`
     } else if (isX(p)) {
-      // ~1.2 == >=1.2.0 <1.3.0
-      ret = `>=${M}.${m}.0 <${M}.${+m + 1}.0`
+      // ~1.2 == >=1.2.0 <1.3.0-0
+      ret = `>=${M}.${m}.0 <${M}.${+m + 1}.0-0`
     } else if (pr) {
       debug('replaceTilde pr', pr)
       ret = `>=${M}.${m}.${p}-${pr
-      } <${M}.${+m + 1}.0`
+      } <${M}.${+m + 1}.0-0`
     } else {
-      // ~1.2.3 == >=1.2.3 <1.3.0
+      // ~1.2.3 == >=1.2.3 <1.3.0-0
       ret = `>=${M}.${m}.${p
-      } <${M}.${+m + 1}.0`
+      } <${M}.${+m + 1}.0-0`
     }
 
     debug('tilde return', ret)
@@ -230,11 +231,11 @@ const replaceTilde = (comp, options) => {
 }
 
 // ^ --> * (any, kinda silly)
-// ^2, ^2.x, ^2.x.x --> >=2.0.0 <3.0.0
-// ^2.0, ^2.0.x --> >=2.0.0 <3.0.0
-// ^1.2, ^1.2.x --> >=1.2.0 <2.0.0
-// ^1.2.3 --> >=1.2.3 <2.0.0
-// ^1.2.0 --> >=1.2.0 <2.0.0
+// ^2, ^2.x, ^2.x.x --> >=2.0.0 <3.0.0-0
+// ^2.0, ^2.0.x --> >=2.0.0 <3.0.0-0
+// ^1.2, ^1.2.x --> >=1.2.0 <2.0.0-0
+// ^1.2.3 --> >=1.2.3 <2.0.0-0
+// ^1.2.0 --> >=1.2.0 <2.0.0-0
 const replaceCarets = (comp, options) =>
   comp.trim().split(/\s+/).map((comp) => {
     return replaceCaret(comp, options)
@@ -243,6 +244,7 @@ const replaceCarets = (comp, options) =>
 const replaceCaret = (comp, options) => {
   debug('caret', comp, options)
   const r = options.loose ? re[t.CARETLOOSE] : re[t.CARET]
+  const z = options.includePrerelease ? '-0' : ''
   return comp.replace(r, (_, M, m, p, pr) => {
     debug('caret', comp, _, M, m, p, pr)
     let ret
@@ -250,40 +252,40 @@ const replaceCaret = (comp, options) => {
     if (isX(M)) {
       ret = ''
     } else if (isX(m)) {
-      ret = `>=${M}.0.0 <${+M + 1}.0.0`
+      ret = `>=${M}.0.0${z} <${+M + 1}.0.0-0`
     } else if (isX(p)) {
       if (M === '0') {
-        ret = `>=${M}.${m}.0 <${M}.${+m + 1}.0`
+        ret = `>=${M}.${m}.0${z} <${M}.${+m + 1}.0-0`
       } else {
-        ret = `>=${M}.${m}.0 <${+M + 1}.0.0`
+        ret = `>=${M}.${m}.0${z} <${+M + 1}.0.0-0`
       }
     } else if (pr) {
       debug('replaceCaret pr', pr)
       if (M === '0') {
         if (m === '0') {
           ret = `>=${M}.${m}.${p}-${pr
-          } <${M}.${m}.${+p + 1}`
+          } <${M}.${m}.${+p + 1}-0`
         } else {
           ret = `>=${M}.${m}.${p}-${pr
-          } <${M}.${+m + 1}.0`
+          } <${M}.${+m + 1}.0-0`
         }
       } else {
         ret = `>=${M}.${m}.${p}-${pr
-        } <${+M + 1}.0.0`
+        } <${+M + 1}.0.0-0`
       }
     } else {
       debug('no pr')
       if (M === '0') {
         if (m === '0') {
           ret = `>=${M}.${m}.${p
-          } <${M}.${m}.${+p + 1}`
+          }${z} <${M}.${m}.${+p + 1}-0`
         } else {
           ret = `>=${M}.${m}.${p
-          } <${M}.${+m + 1}.0`
+          }${z} <${M}.${+m + 1}.0-0`
         }
       } else {
         ret = `>=${M}.${m}.${p
-        } <${+M + 1}.0.0`
+        } <${+M + 1}.0.0-0`
       }
     }
 
@@ -356,12 +358,15 @@ const replaceXRange = (comp, options) => {
         }
       }
 
+      if (gtlt === '<')
+        pr = '-0'
+
       ret = `${gtlt + M}.${m}.${p}${pr}`
     } else if (xm) {
-      ret = `>=${M}.0.0${pr} <${+M + 1}.0.0${pr}`
+      ret = `>=${M}.0.0${pr} <${+M + 1}.0.0-0`
     } else if (xp) {
       ret = `>=${M}.${m}.0${pr
-      } <${M}.${+m + 1}.0${pr}`
+      } <${M}.${+m + 1}.0-0`
     }
 
     debug('xRange return', ret)
@@ -378,32 +383,42 @@ const replaceStars = (comp, options) => {
   return comp.trim().replace(re[t.STAR], '')
 }
 
+const replaceGTE0 = (comp, options) => {
+  debug('replaceGTE0', comp, options)
+  return comp.trim()
+    .replace(re[options.includePrerelease ? t.GTE0PRE : t.GTE0], '')
+}
+
 // This function is passed to string.replace(re[t.HYPHENRANGE])
 // M, m, patch, prerelease, build
 // 1.2 - 3.4.5 => >=1.2.0 <=3.4.5
-// 1.2.3 - 3.4 => >=1.2.0 <3.5.0 Any 3.4.x will do
-// 1.2 - 3.4 => >=1.2.0 <3.5.0
-const hyphenReplace = ($0,
+// 1.2.3 - 3.4 => >=1.2.0 <3.5.0-0 Any 3.4.x will do
+// 1.2 - 3.4 => >=1.2.0 <3.5.0-0
+const hyphenReplace = incPr => ($0,
   from, fM, fm, fp, fpr, fb,
   to, tM, tm, tp, tpr, tb) => {
   if (isX(fM)) {
     from = ''
   } else if (isX(fm)) {
-    from = `>=${fM}.0.0`
+    from = `>=${fM}.0.0${incPr ? '-0' : ''}`
   } else if (isX(fp)) {
-    from = `>=${fM}.${fm}.0`
-  } else {
+    from = `>=${fM}.${fm}.0${incPr ? '-0' : ''}`
+  } else if (fpr) {
     from = `>=${from}`
+  } else {
+    from = `>=${from}${incPr ? '-0' : ''}`
   }
 
   if (isX(tM)) {
     to = ''
   } else if (isX(tm)) {
-    to = `<${+tM + 1}.0.0`
+    to = `<${+tM + 1}.0.0-0`
   } else if (isX(tp)) {
-    to = `<${tM}.${+tm + 1}.0`
+    to = `<${tM}.${+tm + 1}.0-0`
   } else if (tpr) {
     to = `<=${tM}.${tm}.${tp}-${tpr}`
+  } else if (incPr) {
+    to = `<${tM}.${tm}.${+tp + 1}-0`
   } else {
     to = `<=${to}`
   }

node_modules/semver/index.js

@@ -43,4 +43,6 @@ module.exports = {
   gtr: require('./ranges/gtr'),
   ltr: require('./ranges/ltr'),
   intersects: require('./ranges/intersects'),
+  simplifyRange: require('./ranges/simplify'),
+  subset: require('./ranges/subset'),
 }

node_modules/semver/internal/re.js

@@ -177,3 +177,6 @@ createToken('HYPHENRANGELOOSE', `^\\s*(${src[t.XRANGEPLAINLOOSE]})` +
 
 // Star ranges basically just allow anything at all.
 createToken('STAR', '(<|>)?=?\\s*\\*')
+// >=0.0.0 is like a star
+createToken('GTE0', '^\\s*>=\\s*0\.0\.0\\s*$')
+createToken('GTE0PRE', '^\\s*>=\\s*0\.0\.0-0\\s*$')

node_modules/semver/package.json

@@ -1,6 +1,6 @@
 {
   "name": "semver",
-  "version": "7.1.3",
+  "version": "7.3.2",
   "description": "The semantic version parser used by npm.",
   "main": "index.js",
   "scripts": {
@@ -11,7 +11,7 @@
     "postpublish": "git push origin --follow-tags"
   },
   "devDependencies": {
-    "tap": "^14.10.2"
+    "tap": "^14.10.7"
   },
   "license": "ISC",
   "repository": "https://github.com/npm/node-semver",
@@ -19,12 +19,12 @@
     "semver": "./bin/semver.js"
   },
   "files": [
-    "bin",
+    "bin/**/*.js",
     "range.bnf",
-    "classes",
-    "functions",
-    "internal",
-    "ranges",
+    "classes/**/*.js",
+    "functions/**/*.js",
+    "internal/**/*.js",
+    "ranges/**/*.js",
     "index.js",
     "preload.js"
   ],

node_modules/semver/ranges/simplify.js

@@ -0,0 +1,44 @@
+// given a set of versions and a range, create a "simplified" range
+// that includes the same versions that the original range does
+// If the original range is shorter than the simplified one, return that.
+const satisfies = require('../functions/satisfies.js')
+const compare = require('../functions/compare.js')
+module.exports = (versions, range, options) => {
+  const set = []
+  let min = null
+  let prev = null
+  const v = versions.sort((a, b) => compare(a, b, options))
+  for (const version of v) {
+    const included = satisfies(version, range, options)
+    if (included) {
+      prev = version
+      if (!min)
+        min = version
+    } else {
+      if (prev) {
+        set.push([min, prev])
+      }
+      prev = null
+      min = null
+    }
+  }
+  if (min)
+    set.push([min, null])
+
+  const ranges = []
+  for (const [min, max] of set) {
+    if (min === max)
+      ranges.push(min)
+    else if (!max && min === v[0])
+      ranges.push('*')
+    else if (!max)
+      ranges.push(`>=${min}`)
+    else if (min === v[0])
+      ranges.push(`<=${max}`)
+    else
+      ranges.push(`${min} - ${max}`)
+  }
+  const simplified = ranges.join(' || ')
+  const original = typeof range.raw === 'string' ? range.raw : String(range)
+  return simplified.length < original.length ? simplified : range
+}

node_modules/semver/ranges/subset.js

@@ -0,0 +1,155 @@
+const Range = require('../classes/range.js')
+const { ANY } = require('../classes/comparator.js')
+const satisfies = require('../functions/satisfies.js')
+const compare = require('../functions/compare.js')
+
+// Complex range `r1 || r2 || ...` is a subset of `R1 || R2 || ...` iff:
+// - Every simple range `r1, r2, ...` is a subset of some `R1, R2, ...`
+//
+// Simple range `c1 c2 ...` is a subset of simple range `C1 C2 ...` iff:
+// - If c is only the ANY comparator
+//   - If C is only the ANY comparator, return true
+//   - Else return false
+// - Let EQ be the set of = comparators in c
+// - If EQ is more than one, return true (null set)
+// - Let GT be the highest > or >= comparator in c
+// - Let LT be the lowest < or <= comparator in c
+// - If GT and LT, and GT.semver > LT.semver, return true (null set)
+// - If EQ
+//   - If GT, and EQ does not satisfy GT, return true (null set)
+//   - If LT, and EQ does not satisfy LT, return true (null set)
+//   - If EQ satisfies every C, return true
+//   - Else return false
+// - If GT
+//   - If GT is lower than any > or >= comp in C, return false
+//   - If GT is >=, and GT.semver does not satisfy every C, return false
+// - If LT
+//   - If LT.semver is greater than that of any > comp in C, return false
+//   - If LT is <=, and LT.semver does not satisfy every C, return false
+// - If any C is a = range, and GT or LT are set, return false
+// - Else return true
+
+const subset = (sub, dom, options) => {
+  sub = new Range(sub, options)
+  dom = new Range(dom, options)
+  let sawNonNull = false
+
+  OUTER: for (const simpleSub of sub.set) {
+    for (const simpleDom of dom.set) {
+      const isSub = simpleSubset(simpleSub, simpleDom, options)
+      sawNonNull = sawNonNull || isSub !== null
+      if (isSub)
+        continue OUTER
+    }
+    // the null set is a subset of everything, but null simple ranges in
+    // a complex range should be ignored.  so if we saw a non-null range,
+    // then we know this isn't a subset, but if EVERY simple range was null,
+    // then it is a subset.
+    if (sawNonNull)
+      return false
+  }
+  return true
+}
+
+const simpleSubset = (sub, dom, options) => {
+  if (sub.length === 1 && sub[0].semver === ANY)
+    return dom.length === 1 && dom[0].semver === ANY
+
+  const eqSet = new Set()
+  let gt, lt
+  for (const c of sub) {
+    if (c.operator === '>' || c.operator === '>=')
+      gt = higherGT(gt, c, options)
+    else if (c.operator === '<' || c.operator === '<=')
+      lt = lowerLT(lt, c, options)
+    else
+      eqSet.add(c.semver)
+  }
+
+  if (eqSet.size > 1)
+    return null
+
+  let gtltComp
+  if (gt && lt) {
+    gtltComp = compare(gt.semver, lt.semver, options)
+    if (gtltComp > 0)
+      return null
+    else if (gtltComp === 0 && (gt.operator !== '>=' || lt.operator !== '<='))
+      return null
+  }
+
+  // will iterate one or zero times
+  for (const eq of eqSet) {
+    if (gt && !satisfies(eq, String(gt), options))
+      return null
+
+    if (lt && !satisfies(eq, String(lt), options))
+      return null
+
+    for (const c of dom) {
+      if (!satisfies(eq, String(c), options))
+        return false
+    }
+    return true
+  }
+
+  let higher, lower
+  let hasDomLT, hasDomGT
+  for (const c of dom) {
+    hasDomGT = hasDomGT || c.operator === '>' || c.operator === '>='
+    hasDomLT = hasDomLT || c.operator === '<' || c.operator === '<='
+    if (gt) {
+      if (c.operator === '>' || c.operator === '>=') {
+        higher = higherGT(gt, c, options)
+        if (higher === c)
+          return false
+      } else if (gt.operator === '>=' && !satisfies(gt.semver, String(c), options))
+        return false
+    }
+    if (lt) {
+      if (c.operator === '<' || c.operator === '<=') {
+        lower = lowerLT(lt, c, options)
+        if (lower === c)
+          return false
+      } else if (lt.operator === '<=' && !satisfies(lt.semver, String(c), options))
+        return false
+    }
+    if (!c.operator && (lt || gt) && gtltComp !== 0)
+      return false
+  }
+
+  // if there was a < or >, and nothing in the dom, then must be false
+  // UNLESS it was limited by another range in the other direction.
+  // Eg, >1.0.0 <1.0.1 is still a subset of <2.0.0
+  if (gt && hasDomLT && !lt && gtltComp !== 0)
+    return false
+
+  if (lt && hasDomGT && !gt && gtltComp !== 0)
+    return false
+
+  return true
+}
+
+// >=1.2.3 is lower than >1.2.3
+const higherGT = (a, b, options) => {
+  if (!a)
+    return b
+  const comp = compare(a.semver, b.semver, options)
+  return comp > 0 ? a
+    : comp < 0 ? b
+    : b.operator === '>' && a.operator === '>=' ? b
+    : a
+}
+
+// <=1.2.3 is higher than <1.2.3
+const lowerLT = (a, b, options) => {
+  if (!a)
+    return b
+  const comp = compare(a.semver, b.semver, options)
+  return comp < 0 ? a
+    : comp > 0 ? b
+    : b.operator === '<' && a.operator === '<=' ? b
+    : a
+}
+
+module.exports = subset