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nix-shell: In #! mode, pass the last argument

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"i < argc - 1" should be "i < argc".
This commit is contained in:
Eelco Dolstra 2017-01-03 11:40:51 +01:00
parent ae1e4dfad2
commit c287e797a8
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GPG key ID: 8170B4726D7198DE
3 changed files with 14 additions and 16 deletions
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22
src/nix-build/nix-build.cc
View file

@ -105,6 +105,7 @@ int main(int argc, char ** argv)
std::vector<string> args; std::vector<string> args;
for (int i = 1; i < argc; ++i) for (int i = 1; i < argc; ++i)
args.push_back(argv[i]); args.push_back(argv[i]);
// Heuristic to see if we're invoked as a shebang script, namely, if we // Heuristic to see if we're invoked as a shebang script, namely, if we
// have a single argument, it's the name of an executable file, and it // have a single argument, it's the name of an executable file, and it
// starts with "#!". // starts with "#!".
@ -115,7 +116,7 @@ int main(int argc, char ** argv)
if (std::regex_search(lines.front(), std::regex("^#!"))) { if (std::regex_search(lines.front(), std::regex("^#!"))) {
lines.pop_front(); lines.pop_front();
inShebang = true; inShebang = true;
for (int i = 2; i < argc - 1; ++i) for (int i = 2; i < argc; ++i)
savedArgs.push_back(argv[i]); savedArgs.push_back(argv[i]);
args.clear(); args.clear();
for (auto line : lines) { for (auto line : lines) {
@ -288,9 +289,8 @@ int main(int argc, char ** argv)
// executes it unless it contains the string "perl" or "indir", // executes it unless it contains the string "perl" or "indir",
// or (undocumented) argv[0] does not contain "perl". Exploit // or (undocumented) argv[0] does not contain "perl". Exploit
// the latter by doing "exec -a". // the latter by doing "exec -a".
if (std::regex_search(interpreter, std::regex("perl"))) { if (std::regex_search(interpreter, std::regex("perl")))
execArgs = "-a PERL"; execArgs = "-a PERL";
}
std::ostringstream joined; std::ostringstream joined;
for (const auto & i : savedArgs) for (const auto & i : savedArgs)
@ -301,7 +301,6 @@ int main(int argc, char ** argv)
// read the shebang to understand which packages to read from. Since // read the shebang to understand which packages to read from. Since
// this is handled via nix-shell -p, we wrap our ruby script execution // this is handled via nix-shell -p, we wrap our ruby script execution
// in ruby -e 'load' which ignores the shebangs. // in ruby -e 'load' which ignores the shebangs.
envCommand = (format("exec %1% %2% -e 'load(\"%3%\") -- %4%") % execArgs % interpreter % script % joined.str()).str(); envCommand = (format("exec %1% %2% -e 'load(\"%3%\") -- %4%") % execArgs % interpreter % script % joined.str()).str();
} else { } else {
envCommand = (format("exec %1% %2% %3% %4%") % execArgs % interpreter % script % joined.str()).str(); envCommand = (format("exec %1% %2% %3% %4%") % execArgs % interpreter % script % joined.str()).str();
@ -421,7 +420,7 @@ int main(int argc, char ** argv)
// environment variables and shell functions. Also don't lose // environment variables and shell functions. Also don't lose
// the current $PATH directories. // the current $PATH directories.
auto rcfile = (Path) tmpDir + "/rc"; auto rcfile = (Path) tmpDir + "/rc";
writeFile(rcfile, (format( writeFile(rcfile, fmt(
"rm -rf '%1%'; " "rm -rf '%1%'; "
"[ -n \"$PS1\" ] && [ -e ~/.bashrc ] && source ~/.bashrc; " "[ -n \"$PS1\" ] && [ -e ~/.bashrc ] && source ~/.bashrc; "
"%2%" "%2%"
@ -435,13 +434,12 @@ int main(int argc, char ** argv)
"unset NIX_INDENT_MAKE; " "unset NIX_INDENT_MAKE; "
"shopt -u nullglob; " "shopt -u nullglob; "
"unset TZ; %4%" "unset TZ; %4%"
"%5%" "%5%",
) (Path) tmpDir,
% (Path) tmpDir (pure ? "" : "p=$PATH; "),
% (pure ? "" : "p=$PATH; ") (pure ? "" : "PATH=$PATH:$p; unset p; "),
% (pure ? "" : "PATH=$PATH:$p; unset p; ") (getenv("TZ") ? (string("export TZ='") + getenv("TZ") + "'; ") : ""),
% (getenv("TZ") ? (string("export TZ='") + getenv("TZ") + "'; ") : "") envCommand));
% envCommand).str());
Strings envStrs; Strings envStrs;
for (auto & i : env) for (auto & i : env)

4
tests/nix-shell.sh
View file

@ -17,5 +17,5 @@ output=$(NIX_PATH=nixpkgs=shell.nix nix-shell --pure -p foo bar --run 'echo "$(f
sed -e "s|@ENV_PROG@|$(type -p env)|" shell.shebang.sh > $TEST_ROOT/shell.shebang.sh sed -e "s|@ENV_PROG@|$(type -p env)|" shell.shebang.sh > $TEST_ROOT/shell.shebang.sh
chmod a+rx $TEST_ROOT/shell.shebang.sh chmod a+rx $TEST_ROOT/shell.shebang.sh
output=$($TEST_ROOT/shell.shebang.sh) output=$($TEST_ROOT/shell.shebang.sh abc def)
[ "$output" = "foo bar" ] [ "$output" = "foo bar abc def" ]

2
tests/shell.shebang.sh
View file

@ -1,4 +1,4 @@
#! @ENV_PROG@ nix-shell #! @ENV_PROG@ nix-shell
#! nix-shell -I nixpkgs=shell.nix --option use-binary-caches false #! nix-shell -I nixpkgs=shell.nix --option use-binary-caches false
#! nix-shell --pure -i bash -p foo bar #! nix-shell --pure -i bash -p foo bar
echo "$(foo) $(bar)" echo "$(foo) $(bar) $@"