internal/rosa: create /bin symlinks via helper

This centralises the workaround for surprisingly common buggy scripts with nonstandard hardcoded paths.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/llvm.go

@@ -341,6 +341,13 @@ ln -s \
 
 		return &meta, t.NewPackage("llvm", meta.Version, source, &PackageAttr{
 			Flag: TExclusive,
+			Bin: []string{
+				"chmod",
+				"mkdir",
+				"rm",
+				"tr",
+				"awk",
+			},
 		}, &CMakeHelper{
 			Append: []string{"llvm"},
 
@@ -358,16 +365,7 @@ ln -s clang++ /work/system/bin/c++
 			// on 3-stage determinism to test later stages.
 			SkipTest: t.stage.isStage0(),
 
-			Test: `
-chmod +w /bin && ln -s \
-	../system/bin/chmod \
-	../system/bin/mkdir \
-	../system/bin/rm \
-	../system/bin/tr \
-	../system/bin/awk \
-	/bin
-ninja ` + jobsFlagE + ` check-all
-`,
+			Test: "ninja " + jobsFlagE + " check-all",
 		},
 			_python,
 			_perl,

internal/rosa/package/acl/package.az

@@ -13,10 +13,8 @@ package attr {
 
 	patches = [ "musl-errno.patch" ];
 
-	early = `
-ln -s ../../system/bin/perl /usr/bin
-`;
-
+	bin = [ "perl" ];
+	populateUsrBin = true;
 	exec = make {};
 
 	inputs = [

internal/rosa/package/git.az

@@ -12,8 +12,6 @@ package git {
 	};
 
 	early = `
-ln -s ../../system/bin/perl /usr/bin/ || true
-
 # test suite assumes apache
 rm -f /system/bin/httpd
 `;
@@ -22,6 +20,8 @@ rm -f /system/bin/httpd
 	enterSource = true;
 	env = [ "NO_RUST=YesPlease" ];
 
+	bin = [ "perl" ];
+	populateUsrBin = true;
 	exec = make {
 		inPlace = true;
 		generate = "make configure";

internal/rosa/package/gnu.az

@@ -511,10 +511,7 @@ package parallel {
 		compress = bzip2;
 	};
 
-	early = `
-ln -s ../system/bin/bash /bin/
-`;
-
+	bin = [ "bash" ];
 	exec = make {};
 
 	inputs = [

internal/rosa/package/libcap.az

@@ -12,6 +12,7 @@ package libcap {
 	};
 
 	// uses source tree as scratch space
+	enterSource = true;
 	writable = true;
 	chmod = true;
 
@@ -20,8 +21,7 @@ package libcap {
 		"lib=lib",
 	];
 
-	early = "\nln -s ../system/bin/bash /bin/\n";
-
+	bin = [ "bash" ];
 	exec = make {
 		skipConfigure = true;
 		inPlace = true;

internal/rosa/package/libinput.az

@@ -11,8 +11,7 @@ package libinput {
 		checksum = "GxBGPN6YybQxrD2MDsIL8gdDYImXn4NAJi6EvTx_Hb_1jcbjwCrjeyjY2upUyTMi";
 	};
 
-	early = "ln -sf ../system/bin/bash /bin/\n";
-
+	bin = [ "bash" ];
 	exec = meson {
 		setup = {
 			"Dmtdev": "false";

internal/rosa/package/libseccomp/package.az

@@ -13,8 +13,7 @@ package libseccomp {
 	};
 	patches = [ "fix-export-oob-read.patch" ];
 
-	early = "\nln -s ../system/bin/bash /bin/\n";
-
+	bin = [ "bash" ];
 	exec = make {};
 
 	inputs = [

internal/rosa/package/lm_sensors.az

@@ -14,12 +14,8 @@ package lm_sensors {
 	chmod = true;
 	enterSource = true;
 
-	early = `
-ln -s \
-	../../system/bin/perl \
-	/usr/bin/
-`;
-
+	bin = [ "perl" ];
+	populateUsrBin = true;
 	exec = make {
 		inPlace = true;
 		skipConfigure = true;

internal/rosa/package/netfilter/package.az

@@ -81,13 +81,13 @@ sed -i \
 	extensions/libebt_snat.txlate
 `;
 
+	bin = [ "bash" ];
 	exec = make {
 		generate = "./autogen.sh";
 		configure = {
 			"enable-static";
 		};
 		preCheck = `
-ln -s ../system/bin/bash /bin/
 chmod +w /etc/ && ln -s ../usr/src/iptables/etc/ethertypes /etc/
 `;
 	};

internal/rosa/package/ninja.az

@@ -15,6 +15,7 @@ package ninja {
 		"CFLAGS=-std=c++17",
 	];
 
+	bin = [ "echo" ];
 	exec = generic {
 		build = `
 python3 /usr/src/ninja/configure.py \
@@ -22,12 +23,10 @@ python3 /usr/src/ninja/configure.py \
 	--bootstrap
 python3 /usr/src/ninja/configure.py \
 	--gtest-source-dir=/usr/src/extra/googletest
-./ninja ` + jobsFlagE + ` all`;
+./ninja ` + jobsFlagE + ` all
+`;
 
-		check = `
-chmod +w /bin/
-ln -s ../system/bin/echo /bin/
-./ninja_test`;
+		check = "./ninja_test";
 
 		install = `
 mkdir -p /work/system/bin/

internal/rosa/package/pcre2.az

@@ -12,11 +12,8 @@ package pcre2 {
 		compress = bzip2;
 	};
 
-	early = `
-# RunGrepTest expects /bin/echo
-ln -s ../system/bin/toybox /bin/echo
-`;
-
+	// RunGrepTest expects /bin/echo
+	bin = [ "echo" ];
 	exec = make {
 		configure = {
 			"enable-jit";

internal/rosa/package/rdfind.az

@@ -10,10 +10,9 @@ package rdfind {
 		compress = gzip;
 	};
 
-	exec = make {
-		// test suite hard codes /bin/echo
-		preCheck = "\nln -s ../system/bin/toybox /bin/echo\n";
-	};
+	// test suite hard codes /bin/echo
+	bin = [ "echo" ];
+	exec = make {};
 
 	inputs = [ nettle ];
 	runtime = [ nettle ];

internal/rosa/package/util-linux.az

@@ -23,8 +23,7 @@ package util-linux {
 		compress = gzip;
 	};
 
-	early = "\nln -s ../system/bin/bash /bin/\n";
-
+	bin = [ "bash" ];
 	exec = make {
 		configure = {
 			"disable-use-tty-group";

internal/rosa/package/x.az

@@ -781,6 +781,7 @@ package xwayland {
 		checksum = "0D0bs8EbDzlyLIULvm6lizqzdx4g1-umdbjVVO7zk-cS1kVIaSkKronCqj95tz-A";
 	};
 
+	bin = [ "bash" ];
 	exec = meson {
 		setup = {
 			"Dipv6": "false";
@@ -788,10 +789,6 @@ package xwayland {
 		};
 	};
 
-	early = `
-ln -sf ../system/bin/bash /bin/
-`;
-
 	inputs = [
 		bash,
 		gawk,

internal/rosa/rosa.go

@@ -414,6 +414,10 @@ type PackageAttr struct {
 
 	// Passed to [Toolchain.NewPatchedSource].
 	Patches []KV
+	// Programs to make available in /bin/.
+	Bin []string
+	// Whether to replace /usr/bin/ with a symlink to /bin/.
+	PopulateUsrBin bool
 
 	// Unregistered extras.
 	Extra []pkg.Artifact
@@ -544,6 +548,26 @@ cd '/usr/src/` + name + `/'
 		})
 	}
 
+	bin := attr.Bin
+	if attr.PopulateUsrBin {
+		scriptEarly += `
+chmod +w /usr/ /usr/bin/
+rm -rf /usr/bin/
+ln -s ../bin /usr/`
+		bin = append(bin, "env")
+	}
+
+	if t.stage != stageGentoo && len(bin) > 0 {
+		scriptEarly += "\nchmod +w /bin/" +
+			"\n(set -o braceexpand && ln -sf ../system/bin/"
+		if len(bin) > 1 {
+			scriptEarly += "{'" + strings.Join(bin, "','") + "'}"
+		} else {
+			scriptEarly += "'" + bin[0] + "'"
+		}
+		scriptEarly += " /bin/)\n"
+	}
+
 	return t.New(
 		rn,
 		attr.Flag,

internal/rosa/state.go

@@ -1004,15 +1004,17 @@ func (ctx *evalContext) pf(
 		k("block"):       &meta.Blocked,
 		k("latest"):      &meta.latest,
 
-		k("writable"):    &attr.Writable,
-		k("chmod"):       &attr.Chmod,
-		k("enterSource"): &attr.EnterSource,
-		k("env"):         &attr.Env,
-		k("early"):       &attr.ScriptEarly,
-		k("patches"):     &patches,
-		k("files"):       &files,
-		k("exclusive"):   &excl,
-		k("toyboxEarly"): &early,
+		k("writable"):       &attr.Writable,
+		k("chmod"):          &attr.Chmod,
+		k("enterSource"):    &attr.EnterSource,
+		k("env"):            &attr.Env,
+		k("early"):          &attr.ScriptEarly,
+		k("bin"):            &attr.Bin,
+		k("populateUsrBin"): &attr.PopulateUsrBin,
+		k("patches"):        &patches,
+		k("files"):          &files,
+		k("exclusive"):      &excl,
+		k("toyboxEarly"):    &early,
 
 		k("checksum"): &kc,
 		k("output"):   &output,