128 lines
4.8 KiB
Diff
128 lines
4.8 KiB
Diff
diff --git a/src/client/opamInitDefaults.ml b/src/client/opamInitDefaults.ml
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index eca13a7c..1fd66f43 100644
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--- a/src/client/opamInitDefaults.ml
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+++ b/src/client/opamInitDefaults.ml
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@@ -35,11 +35,15 @@ let eval_variables = [
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let os_filter os =
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FOp (FIdent ([], OpamVariable.of_string "os", None), `Eq, FString os)
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+let os_distribution_filter distro =
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+ FOp (FIdent ([], OpamVariable.of_string "os-distribution", None), `Eq, FString distro)
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+
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let linux_filter = os_filter "linux"
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let macos_filter = os_filter "macos"
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let openbsd_filter = os_filter "openbsd"
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let freebsd_filter = os_filter "freebsd"
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let sandbox_filter = FOr (linux_filter, macos_filter)
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+let nixos_filter = os_distribution_filter "nixos"
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let gpatch_filter = FOr (openbsd_filter, freebsd_filter)
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let patch_filter = FNot gpatch_filter
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@@ -50,6 +54,11 @@ let wrappers ~sandboxing () =
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CString t, None;
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] in
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let w = OpamFile.Wrappers.empty in
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+ let w = { w with
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+ OpamFile.Wrappers.
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+ pre_build = [[CString "%{hooks}%/shebangs.sh", None], Some nixos_filter];
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+ }
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+ in
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if sandboxing then
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{ w with
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OpamFile.Wrappers.
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@@ -113,6 +122,7 @@ let required_tools ~sandboxing () =
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let init_scripts () = [
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("sandbox.sh", OpamScript.bwrap), Some bwrap_filter;
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("sandbox.sh", OpamScript.sandbox_exec), Some macos_filter;
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+ ("shebangs.sh", OpamScript.patch_shebangs), Some nixos_filter;
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]
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module I = OpamFile.InitConfig
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diff --git a/src/state/opamScript.mli b/src/state/opamScript.mli
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index 03449970..83de0b53 100644
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--- a/src/state/opamScript.mli
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+++ b/src/state/opamScript.mli
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@@ -20,3 +20,4 @@ val env_hook : string
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val env_hook_zsh : string
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val env_hook_csh : string
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val env_hook_fish : string
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+val patch_shebangs : string
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diff --git a/src/state/shellscripts/patch_shebangs.sh b/src/state/shellscripts/patch_shebangs.sh
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new file mode 100755
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index 00000000..3ea84e2d
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--- /dev/null
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+++ b/src/state/shellscripts/patch_shebangs.sh
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@@ -0,0 +1,73 @@
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+#!/usr/bin/env bash
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+# This setup hook causes the fixup phase to rewrite all script
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+# interpreter file names (`#! /path') to paths found in $PATH. E.g.,
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+# /bin/sh will be rewritten to /nix/store/<hash>-some-bash/bin/sh.
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+# /usr/bin/env gets special treatment so that ".../bin/env python" is
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+# rewritten to /nix/store/<hash>/bin/python. Interpreters that are
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+# already in the store are left untouched.
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+
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+header() { echo "$1"; }
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+stopNest() { true; }
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+
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+fixupOutputHooks+=('if [ -z "${dontPatchShebangs-}" -a -e "$prefix" ]; then patchShebangs "$prefix"; fi')
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+
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+patchShebangs() {
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+ local dir="$1"
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+ header "patching script interpreter paths in $dir"
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+ local f
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+ local oldPath
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+ local newPath
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+ local arg0
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+ local args
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+ local oldInterpreterLine
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+ local newInterpreterLine
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+
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+ find "$dir" -type f -perm -0100 | while read f; do
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+ if [ "$(head -1 "$f" | head -c+2)" != '#!' ]; then
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+ # missing shebang => not a script
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+ continue
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+ fi
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+
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+ oldInterpreterLine=$(head -1 "$f" | tail -c+3)
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+ read -r oldPath arg0 args <<< "$oldInterpreterLine"
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+
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+ if $(echo "$oldPath" | grep -q "/bin/env$"); then
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+ # Check for unsupported 'env' functionality:
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+ # - options: something starting with a '-'
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+ # - environment variables: foo=bar
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+ if $(echo "$arg0" | grep -q -- "^-.*\|.*=.*"); then
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+ echo "unsupported interpreter directive \"$oldInterpreterLine\" (set dontPatchShebangs=1 and handle shebang patching yourself)"
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+ exit 1
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+ fi
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+ newPath="$(command -v "$arg0" || true)"
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+ else
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+ if [ "$oldPath" = "" ]; then
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+ # If no interpreter is specified linux will use /bin/sh. Set
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+ # oldpath="/bin/sh" so that we get /nix/store/.../sh.
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+ oldPath="/bin/sh"
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+ fi
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+ newPath="$(command -v "$(basename "$oldPath")" || true)"
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+ args="$arg0 $args"
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+ fi
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+
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+ # Strip trailing whitespace introduced when no arguments are present
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+ newInterpreterLine="$(echo "$newPath $args" | sed 's/[[:space:]]*$//')"
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+
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+ if [ -n "$oldPath" -a "${oldPath:0:${#NIX_STORE}}" != "$NIX_STORE" ]; then
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+ if [ -n "$newPath" -a "$newPath" != "$oldPath" ]; then
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+ echo "$f: interpreter directive changed from \"$oldInterpreterLine\" to \"$newInterpreterLine\""
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+ # escape the escape chars so that sed doesn't interpret them
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+ escapedInterpreterLine=$(echo "$newInterpreterLine" | sed 's|\\|\\\\|g')
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+ # Preserve times, see: https://github.com/NixOS/nixpkgs/pull/33281
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+ touch -r "$f" "$f.timestamp"
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+ sed -i -e "1 s|.*|#\!$escapedInterpreterLine|" "$f"
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+ touch -r "$f.timestamp" "$f"
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+ rm "$f.timestamp"
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+ fi
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+ fi
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+ done
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+
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+ stopNest
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+}
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+
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+patchShebangs .
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