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Handle substitution references in mk2rbc

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Bug: 201700692
Test: go test
Change-Id: I5ba5e51848e795e39f1f65dc153e4c1530066860
This commit is contained in:
Cole Faust
2021-12-07 15:20:45 -08:00
parent 4eadba7438
commit c36c962670
2 changed files with 45 additions and 0 deletions
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28
mk2rbc/mk2rbc.go
View File

@@ -1332,6 +1332,34 @@ func (ctx *parseContext) parseReference(node mkparser.Node, ref *mkparser.MakeSt
// TODO (asmundak): if we find many, maybe handle them.
return ctx.newBadExpr(node, "SOONG_CONFIG_ variables cannot be referenced, use soong_config_get instead: %s", refDump)
}
// Handle substitution references: https://www.gnu.org/software/make/manual/html_node/Substitution-Refs.html
if strings.Contains(refDump, ":") {
parts := strings.SplitN(refDump, ":", 2)
substParts := strings.SplitN(parts[1], "=", 2)
if len(substParts) < 2 || strings.Count(substParts[0], "%") > 1 {
return ctx.newBadExpr(node, "Invalid substitution reference")
}
if !strings.Contains(substParts[0], "%") {
if strings.Contains(substParts[1], "%") {
return ctx.newBadExpr(node, "A substitution reference must have a %% in the \"before\" part of the substitution if it has one in the \"after\" part.")
}
substParts[0] = "%" + substParts[0]
substParts[1] = "%" + substParts[1]
}
v := ctx.addVariable(parts[0])
if v == nil {
return ctx.newBadExpr(node, "unknown variable %s", refDump)
}
return &callExpr{
name: "patsubst",
returnType: knownFunctions["patsubst"].returnType,
args: []starlarkExpr{
&stringLiteralExpr{literal: substParts[0]},
&stringLiteralExpr{literal: substParts[1]},
&variableRefExpr{v, ctx.lastAssignment(v.name()) != nil},
},
}
}
if v := ctx.addVariable(refDump); v != nil {
return &variableRefExpr{v, ctx.lastAssignment(v.name()) != nil}
}

17
mk2rbc/mk2rbc_test.go
View File

@@ -1112,6 +1112,23 @@ def init(g, handle):
g["TEST_VAR_2"] = ("bar" if g["TEST_VAR"] else "")
g["TEST_VAR_3"] = ("bar" if g["TEST_VAR"] else "baz")
g["TEST_VAR_3"] = (g["TEST_VAR_LIST"] if g["TEST_VAR"] else [])
`,
},
{
desc: "substitution references",
mkname: "product.mk",
in: `
SOURCES := foo.c bar.c
OBJECTS := $(SOURCES:.c=.o)
OBJECTS2 := $(SOURCES:%.c=%.o)
`,
expected: `load("//build/make/core:product_config.rbc", "rblf")
def init(g, handle):
cfg = rblf.cfg(handle)
g["SOURCES"] = "foo.c bar.c"
g["OBJECTS"] = rblf.mkpatsubst("%.c", "%.o", g["SOURCES"])
g["OBJECTS2"] = rblf.mkpatsubst("%.c", "%.o", g["SOURCES"])
`,
},
}