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Allow using include_top to filter results even when there is a constant prefix

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Previously, when seeing a `include foo/$(VAR)/bar.mk`, the include
tops wouldn't apply to filter down the results any further.

Allowing include_tops is useful here to prevent cycles in the
load graph.

Fixes: 236025787
Test: go test
Change-Id: I3ea445f222ee2283a68d4aca5002df750204076f
This commit is contained in:
Cole Faust
2022-06-14 12:45:26 -07:00
parent 83a02e4390
commit 74ac027962
2 changed files with 32 additions and 17 deletions
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40
mk2rbc/mk2rbc.go
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@@ -830,21 +830,13 @@ func (ctx *parseContext) handleSubConfig(
pathPattern = append(pathPattern, chunk)
}
}
if pathPattern[0] == "" && len(ctx.includeTops) > 0 {
// If pattern starts from the top. restrict it to the directories where
// we know inherit-product uses dynamically calculated path.
for _, p := range ctx.includeTops {
pathPattern[0] = p
matchingPaths = append(matchingPaths, ctx.findMatchingPaths(pathPattern)...)
}
} else {
matchingPaths = ctx.findMatchingPaths(pathPattern)
if len(pathPattern) == 1 {
pathPattern = append(pathPattern, "")
}
matchingPaths = ctx.findMatchingPaths(pathPattern)
needsWarning = pathPattern[0] == "" && len(ctx.includeTops) == 0
} else if len(ctx.includeTops) > 0 {
for _, p := range ctx.includeTops {
matchingPaths = append(matchingPaths, ctx.findMatchingPaths([]string{p, ""})...)
}
matchingPaths = append(matchingPaths, ctx.findMatchingPaths([]string{"", ""})...)
} else {
return []starlarkNode{ctx.newBadNode(v, "inherit-product/include argument is too complex")}
}
@@ -872,17 +864,31 @@ func (ctx *parseContext) findMatchingPaths(pattern []string) []string {
}
// Create regular expression from the pattern
s_regexp := "^" + regexp.QuoteMeta(pattern[0])
regexString := "^" + regexp.QuoteMeta(pattern[0])
for _, s := range pattern[1:] {
s_regexp += ".*" + regexp.QuoteMeta(s)
regexString += ".*" + regexp.QuoteMeta(s)
}
s_regexp += "$"
rex := regexp.MustCompile(s_regexp)
regexString += "$"
rex := regexp.MustCompile(regexString)
includeTopRegexString := ""
if len(ctx.includeTops) > 0 {
for i, top := range ctx.includeTops {
if i > 0 {
includeTopRegexString += "|"
}
includeTopRegexString += "^" + regexp.QuoteMeta(top)
}
} else {
includeTopRegexString = ".*"
}
includeTopRegex := regexp.MustCompile(includeTopRegexString)
// Now match
var res []string
for _, p := range files {
if rex.MatchString(p) {
if rex.MatchString(p) && includeTopRegex.MatchString(p) {
res = append(res, p)
}
}